Page 1

OPERATING INSTRUCTIONS VOLUME CORRECTOR Type ERZ 9004 (AGA-NX 19)

Status: June 1995 Subject to changes


CONTENTS 1

Introduction to the ERZ 9004

3

2

ERZ 9004 Front Panel

4

3

Operating the ERZ 9004

5

4

ID Display / Device Data

7

5

Display Fault / Clear Fault Function

8

6

"TEST" Key Special Function: Freeze / Calibration During Operation

9

7 7.1 7.2 7.3

Summary of Coordinates for the ERZ 9004 Coordinates from A to L Coordinates from M to T Coordinates from U to Y

11 11 12 13

8 8.1 8.2 8.2.1 8.2.2 8.2.3 8.2.4 8.2.5 8.3 8.3.1 8.3.2 8.3.3 8.3.4 8.4 8.5 8.6 8.7 8.8

Summary of Device Functions to Be Called up with Function Keys Description of the matrix structure Device-specific functions Pressure at measuring conditions Temperature at measuring conditions (PT100) Volume flow rate at actual conditions Standard volume flow rate Analysis Outputs Current outputs Dispatcher outputs Data interface - Standard Data interface for gas (DSfG) - Option Totalizers Test ID display Mode Clear / Fault

14 14 15 15 16 17 18 19 20 20 21 21 22 23 24 25 26 27

Annex A

Function Chart for the ERZ 9004 Volume Corrector

28

Annex B

Survey of Equations Used

29

Annex C

Operating Examples (setting totalizers, enabling user levels, etc.)

30

Annex D

Technical Data

34

Annex E

Terminal Diagrams

38

Annex F

Wiring Examples

42

Annex G

Fault List

45

Annex H

Data Interface for Gas (DSfG) - Option

47


1

Introduction to the ERZ 9004

The operating concept: The operating concept has been chosen in such a way that the operator can easily use the device without wasting too much time reading a manual. The function keys: The most important data for the operator can be directly selected via function keys. There are function keys for Pressure Temperature Analysis values Flow rates Totalizer readings Outputs (currents, dispatcher, interfaces) Identification / device data Storing measured values (freeze) / calibration during operation. The system of coordinates: A system of coordinates makes it easy for the operator to access all configuration data, measured values and operands by means of a table. The system of coordinates is based on 24 columns and 46 lines. Columns are marked A to Y and contain 46 lines per column. The operator can reach every value in this system of coordinates via cursor keys (arrows). The display field: An alphanumeric 2-line display with 20 characters per line enables data and measured values to be indicated together with their short designations and units. The luminescent display field in blue is easily readable even from a distance. The system: A complete Flow Computer System has been developed taking the size of a Eurocard as a basis and using the most advanced SMD technology with large-scale integrated components. A fully assembled printed circuit board incorporates all inputs required for a complex corrector. The range extends from simple volume correctors through density correctors to calorific value correctors. The type of the individual device essentially depends on the software used. Therefore, all conceivable special versions, such as density computers or calorific value computers, are possible. Thanks to large-scale integrated components, fewer parts are required and this also contributes to making the device reliable.

3


2

ERZ 9004 Front Panel

RMG Messtechnik Power / Standby

MESSTECHNIK

Base Volume Flow Computer Type ERZ 9004

Run

Ser.-No.:

Warning

Year Further data press button "identify"

Fault

97

GF 9

Input

1

2

3

4

5

6

Pressure

Temp.

C. Factor

Density

Output

Test

7

8

9

0

_, +

Totalizer

LED’s

4

Sealable slide switch

RS 232 C port

Flow Rate S. Density Cal. Value

2-line display with 20 characters per line

ID Mode

* Select

Clear Fault

Keypad for directly accessing the various device functions

Enter

ID plate with basic data; all other data can be accessed via the ID function key

Main stamp


3

Operating the ERZ 9004 Description of function keys

Pressure

Temp.

C. Factor

Density

Output

Test

Indication of the PRESSURE and when pressing the ↑ ↓ keys all pressure-related values. Indication of the TEMPERATURE and when pressing the ↑ ↓ keys all temperature-related values. Indication of the COMPRESSIBILITY FACTOR and the VOLUME CORRECTION FACTOR and when pressing the ↑ ↓ keys all the other gas-analysis values. This function is not available with the ERZ 9004 volume corrector. Indication of all outputs of the device: ANALOG, DIGITAL or DATA INTERFACES. Activation of the FREEZE and CALIBRATION DURING OPERATION functions. This key initiates a dual function (see Chapter 6). Indication of Va and Vn totalizers.

Totalizer Flow Rate

S. Density

Cal. Value

ID ⇒ Mode

Indication of the VOLUME AT ACTUAL CONDITIONS and when pressing the ↑ ↓ keys all values related to the volume at actual conditions.

This function is not available with the ERZ 9004 volume corrector.

This function is not available with the ERZ 9004 volume corrector.

Indication of DEVICE DATA and OPERATING MODES.

5


Special function keys ↑

Arrow up / down

Arrow to the right / left

Clear

Enter

Select

To scroll up or down by lines within a column. If you press ↑ at the beginning of a line of a column, you jump to the freeze table, namely to the last value of this table. Now you can select the fourth, third or second value by pressing ↑. If you press ↓ at the end of the freeze table, the display returns to the standard indication of the function key.

To scroll to the right or left by columns within a line. If you press ←, you can jump via the first column to the last column. If you press →, you can jump via the last column to the first column. The following applies to cursor keys in general: Unoccupied line fields within a column and unoccupied columns within a line are automatically skipped. If the column jumped to is occupied but the line field is empty, the line number is automatically increased until an occupied field is found. When you jump to the next column, the initial line number is selected again.

Clear / Fault

Enter

Select

*

6

a)

To clear incorrect inputs in the programming mode. The state prior to inputting the first digit is restored.

b)

To indicate and clear fault messages.

c)

To close user inputs (locking by means of the code number).

To initiate and complete a data input. All data inputted are accepted.

To switch over from short designations to coordinates and vice versa. Switching over is possible in almost all fields (also in the programming mode).


4

ID Display / Device Data

Press the ID / MODE key

p

ID line 0.9...4.5

T

ID line -10....50

1/17 bar

|

1

press ↓ 1/17 °C

2

←Line numbering

etc. The ID display comprises a field with a maximum of 17 data lines, a header line and a bottom line. When you press the ID / MODE key, the header line overlays the upper part of the display field. The header line will always remain in the upper part of the display field as long as the ID mode is active. The first data line of the ID data field is shown in the lower part of the display field. You can now scroll in the ID data lines by pressing the ↓ or ↑ key. The bottom line appears at the end of the data field. Header line

ID contens

Bottom line

ID line p T Meter G q KV ECL Meter -type Meter-No. PT type PT No. TT type TT No. QminHP Rho<HP Rho>HP Gas type Comp-No ** End of ID

0.9...4.5 -10...50 6500.0 200...10000 600.315 G7 TRZ 22523 G1151AP 634711 AGG Ex 664711 0.0 0 0 Natural gas 604711

bat °C m3/h pm3 Yes

m3/h kg/m3 kg/m3

1-17 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

**

Programming the ID display Set the switch to "Input" and make your changes after the bottom line "** End of ID**" has been displayed.

7


5

Display Fault / Clear Fault Function

Display fault The occurrence of a fault is indicated by the Fault LED on the front panel of the device or by an isolated contact at the terminal block. The LED flashes if faults are pending. If faults are no longer pending, the LED turns to steady light. To display fault texts, you must press the CLEAR / FAULT key. After you have pressed this key, the display field shows Fault indication and the bottom line shows the fault texts at 3second intervals. All messages are consecutively shown in the display field. As long as the Fault LED flashes, there is still at least one fault pending. If the Fault LED shows steady light, all indicated fault messages are no longer valid and the device has returned to fault-free operation. Clear fault There are two operating modes for clearing fault messages: DIRECT CLEARING and INDIRECT CLEARING. You can select the desired operating mode under FAULT-MOD in the field Y 17. a)

Direct clearing In the fault indication mode you can clear fault messages directly via the CLEAR / FAULT key.

b)

Indirect clearing You cannot clear fault messages unless you have selected the CLEAR FAULT ? field (Y5) using the ENTER key.

The time and date of the fault occurred are shown in the fields Y3 and Y4. If there is more than one fault pending, the time and date of the first fault occurred are shown. The time and date of the last fault acknowledgment are shown in the field Y6.

8


6

“TEST“ Key Special Function: Freeze / Calibration During Operation

The TEST key comprises two functions: 1. Freeze function 2. Calibration during operation

(storage of measured values and operands) (start / stop function of totalizers)

Freeze Manual freezing If the freeze mode is set to manual, a freeze operation is performed every time you press the TEST key. The frozen values can be read in the columns A ... V, lines 43, 44, 45, 46. Example: Press the TEST key. The display will show the totalizers for calibration during operation. At the same time, all freeze coordinates are written with the current values at this moment. Press the FLOW RATE key and the display will show the frozen value for the volume at actual conditions. The following is displayed for example:

Current value Current value

qa fm

1622,74 450,34

m3/h Hz

press ↑ 3 times Current value Frozen value

qa Fqa

1622,74 1621,45

m3/h Hz

If you press the TEST key again, this will result in repeated freezing of current values. Automatic freezing In the automatic freeze mode, the desired parameters are preselected in the "Mode" column. Example: You want to freeze current values daily at 06:00:00 a.m. First input the code number to enable the change option for the appropriate fields. Press the MODE key. Press → once. Mode Current time

Time:

13-25-43

9


press ↓ 4 times Manual freezing

F-mod:

Mode Manual

Set the “F-mod“ mode to daily freezing [Day(s)]: Press the ENTER key. Press the MODE key 3 times.

Daily freezing

F-mod:

Mode Day(s)

Press ↓ once

Start time

F-time:

Mode hh:mm:ss

Input the desired time for the first freeze operation. Press ↓ once Start date

F-date:

Mode dd:mm:yy

Input the desired date (no days of the past) for the first freeze operation. Press ↓ once Repetition rate

F-rep:

Mode xx

Input the desired repetition rate. For daily repetition, input “1“ Calibration during operation Parallel to the totalizers for official calibration, separate totalizers for standard volume and corrected and uncorrected volumes at actual conditions can be started or stopped via the TEST key. At the same time the totalizers are started, they are set to "0". Attention! Each time the totalizers are started or stopped, a freeze operation of the appropriate fields is performed in the manual freeze mode. If the freeze mode is not set to "manual", pressing the TEST key will not have any effect on freezing.

10


7

Summary of Coordinates for the ERZ 9004

7.1

Coordinates from A to L Press. A / 01

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

Meas. value 1 Meas. value 2 In / Out 1 In / Out 2 Min. range Max. range Min. limit Max. limit Default value Jump Reference Corr. factor Averaging Min. contact Max. contact Mode 1 Mode 2

19 Mode 3 20 Last meas. val 21 Specif. value 22 Delta limit 23 Delta act. val. 24 Meas. value 25 Cor. meas. val 26 Corr. factor 27 Constants 28 Constants 29 Constants 30 Constants 31 Constants 32 Constants 33 Constants 34 Constants 35 Constants 36 Constants 37 Special 38 Special 39 Special 40 Special 41 Special 42 Special 43 Freeze / CDO 44 Freeze / CDO 45 Freeze / CDO 46 Freeze / CDO

B/ 02

C/ 03

D/ 04

Temp. E / 05

p

t

I (mA)

R (Ohm)

p-min p-max

T-min T-max

p-default delta (%) p-standard Input

T-default delta (%) T-stand. Input

p< p>

T< T>

off / 0- / 4Meas. / DF val. pabs/pgauge

off / on Meas. / DF val.

F/ 06

G/ 07

H/ 08

I/ 09

Flow Rate 1 J / 10

Flow Rate 2 K / 11

Analysis L / 12

qa qac fm (Hz) fr (Hz) qa-min qa-max

qn / qM

VCF K

Difference (%) delta (%)

Input qa< qa>

K-default

Input qn< / qM< qn> / qM>

off / on 1/ 1:1 / x:y

AGA / K=c

off / corr.

delta Kvc (%) d-Kvc (%) Kvc Kv Meas. wheel Ref. wheel Missing puls. Ref. pulses Startup puls. f<L t<qa-min A -2 A -1 A0 A1 A2 qa peak Date / Time

1st value 3rd value

Locked via calibration switch (E)

Italic

1st value 3rd value

1st value 2nd value 3rd value 4th value

Locked via code number (B)

Italic

delta (%) delta (%) ra-calc

CO2-H H2-H Rhon-H Hon-H

qn peak Date / Time

1st value

Zn Z 1st value 2nd value

No locking (A)

11


7.2

Coordinates from M to T

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Meas. value 1 Meas. value 2 In / Out 1 In / Out 2 Min. range Max. range Min. limit Max. limit Default val. Jump Reference Corr. factor Averaging Min. contact Max. contact

18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46

Mode 2 Mode 3 Last meas.val. Specif. value Delta limit Delta act. val. Measured val. Corr.meas.val. Corr. factor Constants Constants Constants Constants Constants Constants Constants Constants Constants Constants Special Special Special Special Special Special Freeze Freeze Freeze Freeze

Mode 1

Analog 1 Analog 2 Analog 3 Analog 4 M / 13 N / 14 O / 15 P / 16 Phys. value Phys. value Phys. value Phys. value I 1 (mA)

I 2 (mA)

Digital 2 R / 18 Designation

Data 1 Data 2 S / 19 T / 20 Designation Designation

I 4 (mA)

Phys. value Phys. value Phys. value Phys. value Phys. value Phys. value Phys. value Phys. value

Cal. curr.

Cal. curr.

Cal. curr.

Cal. curr.

50 ... 300 ms

50 ... 300 ms

Selection Input Input

Selection Input Input

Selection Input Input

Selection Input Input

Selection

Selection

off / 0- /4/CC

off / 0- /4/CC

off / 0- /4/CC

off / 0- /4/CC

off / on

off / on

Locked via calibration switch (E)

12

I 3 (mA)

Digital 1 Q / 17 Designation

off / on

off / on Mode

Pulse value 1 Pulse value 2

Italic

Locked via code number (B)

Italic

Baud

No locking (A)

Baud


7.3

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46

Coordinates from U to Y

Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Special Freeze Freeze Freeze Freeze

Totalizer U / 21 Vn Vac Va

Test V / 22 Vn Vac Va

Vac dist. quan. Vn dist. quan. Va dist. quan.

Oper./malfunct.

TF Va TF Vn

Setting Vac Setting Vn Setting Va Setting VacD Setting VnD Setting VaD

Vac Vn Va

ID W / 23 Designation ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID Designation

Mode X / 24 Designation Time Date Code No. Operat. hrs Freeze mode Freeze time Freeze rep. Freeze date Last freeze Clock/external Auto / revision Manu./channel Print time start Print interval Revis. interval Last print Limit. contacts Display mode Comp. type Version Comp. No. A/D corr. RTC corr. System fr. fV System fr. fD Lamp test b. Lamp test t.

Fault Y / 25 Designation Indication Fault time Fault date Clear fault Last clearing

Fault mode

Vac dist.quan Vn dist.quan. Va dist.quan.

Locked via calibration switch (E)

Italic

Locked via code number (B)

Italic

No locking (A)

13


8.

Summary of Device Functions to Be Called up with Function Keys

8.1

Description of the matrix structure Function key on the ERZ 9000 Sequence of key operations to reach the desired column

Pressure

Designation of the column A .... 1st column of the matrix (01) .. Programming value for this column

â&#x2020;&#x201C; Direct access

1 3 5 6 9

A A E E B

A (01)

Description of coordinates

P I P min P max PV

Measured value for pressure (absolute pressure) Measured value for input current Lower adjusting value and fault limiting value Upper adjusting value and fault limiting value Default value (replacement value if a fault occurs)

Unit bar a mA bar a/g bar a/g bar a

Comment(s)

2) 3)

Short description of the coordinate Abbreviation of the coordinate (Display of the ERZ 9000)

Unit of the value displayed or programmed

Data protection level: A ... Display value B ... Data which the user can be modify using a code number E ... Data which can be modified via the slide switch (sealable)

Designation of the line 9 ... 9th line column A

14

Explanatory notes on the coordinate


8.2

Device-specific funktions

8.2.1 Pressure at measuring conditions

Pressure

â&#x2020;&#x201C; Direct access

1 3 5 6 9 10 11 12 14 15 17 18 19 43 44

1) 2) 3) 4)

A A E E B B E E B B E E E A A

A (01) p I P-min P-max PDF P-JP pn p-c p< p> P-mod1 P-mod2 P-mod3 FP FI

Description of coordinates Measured value for pressure (absolute pressure) Measured value for input current Lower adjusting value and fault limiting value Upper adjusting value and fault limiting value Default value (replacement value if a fault occurs) Max. permissible jump from measured value to measured value Standard pressure (reference quantity) Correction factor: balancing A/D converter offset Contact: lower limit Contact: upper limit Mode 1: current input = off (default value) / 0-20mA / 4-20mA Mode 2: if a fault occurs = default / measured value (last measurement) Mode 3: pressure transmitter = pabs / pgauge Freeze: pressure (bar) Freeze: input current

Unit bara mA bara/g bara/g bara % bar

Comment(s)

2) 3)

4)

bara bara 1) 1) 1) bara mA

Rolling texts! Press the MODE key to make your changes. Assigning 0 mA or 4 mA to the lower adjusting value. Assigning 20 mA to the upper adjusting value. Reference quantity for standard conditions of the country concerned.

15


8.2.2 Temperature at measuring conditions (PT 100)

Temp. ↓ Direct access

1 3 5 6 9 10 11 12 14 15 17 18 43 44

A A E E B B E E B B E E A A

E (05) T R T-min T-max TDF T-JP tn T-C T< T> T-mod1 T-mod2 FT FR

Description of coordinates Measured value for gas temperature Measured value for input resistance Lower fault limiting value Upper fault limiting value Default value (replacement value if a fault occurs) Max. permissible jump from measured value to measured value Standard temperature = 0 / 15 (reference quantity) Correction factor : balancing A/D converter offset Contact: lower limit Contact: upper limit Mode 1: resistance measurement off / on (PT 100) Mode 2: if a fault occurs = default / measured value (last measurement) Freeze: temperature at measuring conditions Freeze: input resistance

1) Rolling texts! Press the MODE key to make your changes. 2) Assigning to the lower adjusting value. 3) Assigning to the upper adjusting value. 4) Reference quantity for standard conditions of country concerned.

16

Unit °C ohm °C °C °C % °C

Comment(s)

2) 3)

4)

°C °C 1) 1) °C ohm


8.2.3 Volume flow rate at actual conditions

Flow Rate â&#x2020;&#x201C; Direct access

1 2 3 4 5 6 9 10 13 14 15 17 18 19 22 23 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 43 44 45 46

J (10) qa A qac A fm A fv A qa-min E qa-max E qa D% B qa JP B qA B qa< B qa> B qa-mod1 E qa-mod2 E E Fault corr G7 d Kvc>L E d Kvc A Kvc A Kv E MWP E RWP E DP E RP E P Start E f<L E t-qmin E A-2 E A-1 E A0 E A1 E A2 E >qa A > A Fqa A Fqac A Ffm A Ffv A

Description of coordinates Calculated volume flow rate at actual conditions Calculated corrected volume flow rate at actual conditions Measuring channel input frequency Reference channel input frequency Lower fault limiting value of the volume meter Upper fault limiting value of the volume meter Max. permissible difference between qam and qar Max. permissible jump from measured value to measured value Averaging factor for flow rate calculation and display Contact: lower limit Contact: upper limit Mode 1: volume measurement = on / off Mode 2: operating mode = 1-chan. / 1:1 (2-chan.) / x:y (2- chan.) Mode: error curve linearization: yes / no Limiting value for max. deviation due to error curve linearization Deviation of corrected pulse value (Kvc) from pulse value (Kv) Corrected pulse value of the volume meter Volume meter pulse value Number of blades of the measuring wheel * 10 Number of blades of the reference wheel * 10 Limiting value for the number of disturbing pulses (official value 10) Limiting value for the number of reference pulses (off. val. 10000) Suppression of fault messages during startup of volume meter Min. volume meter frequency Max. operating time for qa < qa-min Polynominal coefficient for error curve linearization Polynominal coefficient for error curve linearization Polynominal coefficient for error curve linearization Polynominal coefficient for error curve linearization Polynominal coefficient for error curve linearization Max. qa value (peak value) Time of max. value (date / time) Freeze: volume flow rate at actual conditions Freeze: corrected volume flow rate at actual conditions Freeze: measuring channel frequency Freeze: reference channel frequency

Unit m3/h m3/h Hz Hz m3/h m3/h % %

Comment(s) 5)

2)

m3/h m3/h

% % pulses/m3 pulses/m3

pulses pulses pulses Hz s

1) 3) 1) 4) 1) 5) 5) 5)

6) 6) 7) 8) 5) 5) 5) 5) 5)

m3/h m3/h m3/h Hz Hz

5)

Comments: See next page.

17


8.2.4 Standard volume flow rate

Flow Rate Indirect access by pressing the → key 1 14 15 39 40 43

A B B A A A

K (11) qn qm< qm> >qm > Fqn

Description of coordinates Calculated standard volume flow rate Min. limiting value contact Max. limiting value contact Max. qn value (peak value) Time of max. value (date / time) Freeze: standard volume flow rate

Unit m3/h m3/h m3/h m3/h

Comment(s)

m3/h

Comments on the column for the volume flow rate at actual conditions 1) Rolling texts! Press the MODE key to make your changes. 2) If the percentage deviation between the qa measuring channel (qam) and the qa reference channel (qar) is smaller than the preset value, the arithmetic mean is used to display the qa flow rate and the qa current output. If the deviation is greater, the greater one of the two flow rates is used. Attention! The calculation or display of flow rates does not have any effect on the calculation and monitoring of totalizers. 3) Va-mod1 = “off“ The Flow Computer operates in the pulse counting mode without monitoring volume limits including f<L. 4) Va-mod2 = “1-chan.“ J/9, J/27 - J/31 not active Va-mod2 = “1:1“ J/27, J/28 not active Va-mod2 = “x:y“ J/29, J/30, J/31 not active 5) Fault corr G7 = “no“ The field is not displayed. 6) Number of permissible missing pulses for a quantity of reference pulses before an alarm is tripped. 7) Lower limiting frequency of the volume meter. When the frequency drops below the lower limiting frequency, correction is no longer carried out. 8) Time in seconds during which the volume meter can be operated below qa-min before an alarm is tripped.

18


8.2.5 Analysis

C. Factor â&#x2020;&#x201C; Direct access

1

A

L (12) VCF

2

A

K

9 13 17 24 27 29 30 31 32 34 35 36 40 41 43 44

B B B A B B B B B B B B A A A A

K-DF VCF A K-mod Racalc CO2-H Rhon-H Hon-H N2-H CO2-L Rhon-L Hon-L N2-L Zn Z FVCF FK

Description of coordinates Reference Volume correct. factor for measurem. of pressure and temp. Compressibility factor calculated acc. to AGA-NX 19 or default value Compressibility factor default value Averaging factor for VCE (from p, T) Mode: K calculation = AGA / K=const(ant) Calculated density at actual conditions Carbon content of the gas - Analysis 1 Standard density of the gas - Analysis 1 Superior calorific value of the gas - Analysis 1 Nitrogen content of the gas - Analysis 1 Carbon content of the gas - Analysis 2 Standard density of the gas - Analysis 2 Superior calorific value of the gas - Analysis 2 Nitrogen content of the gas - Analysis 2 Real gas factor at standard conditions Real gas factor at actual conditions Freeze: volume correction factor Freeze: compressibility factor

Unit

Comment(s)

1) kg/m3 % kg/m3 kWh/m3 % % kg/m3 kWh/m3 %

2)

2) 2)

2)

1) Rolling texts! Press the MODE key to make your changes. 2) Inputs must be made in mol %. If values are only available in vol %, you must convert them to mol %. Convert: mol % CO2 = vol % CO2 * 1.0037 mol % H2 = vol % H2 * 0.9964

19


8.3

Outputs

8.3.1 Current outputs

Output ↓ Direct access

Analog 1 M (13) I1O 1 A I 3 A 5 B O1 min 6 B O1 max I1 CC 9 B O1 CS 11 B I1-c 12 B I1-A 13 B I1-mod 17 B

Analog 2 N (14) I2O I O2 min O2 max I2 CC O2 CS I2-c I2-A I2-mod

Analog 3 O (15) I3O I O3 min O3 max I3 CC O3 CS I3-c I3-A I3-mod

Analog 4 P (16) I4O I O4 min O4 max I4 CC O4 CS I4-c I4-A I4-mod

Description of coordinates Physical value for output n Current for output n Lower limiting value for output n Upper limiting value for output n Calibration current default value Selection of coordinate Correct. factor (D/A converter offset) Averaging factor (damping) Mode: operating mode = off / 0-20 mA / 4-20 mA / calibration current

Unit variable mA variable variable mA

Comment(s)

1) Rolling texts! Press the MODE key to make your changes. 2) Assigning physical limits to 0/4 mA or 20 mA. 3) If the "calibration current" mode is selected under l(n)-mod (M17 ... P17), the corresponding output (n) operates as current transmitter. The current value preselected in the corresponding fields M9 ... P9 will be outputted. 4) Selection of measured value to be outputted as current. Preselect the value via its coordinate. Example: See Annex C.

20

2) 2) 3) 4)

1)


8.3.2 Dispatcher outputs

Output Indirect access by pressing the → key 4 times →

1 9 11 17 27

1)

Digital 1 Q (17) Dispatcher 1 PW D1CS D1-mod Df1

A B B B B

Digital 2 R (18) Dispatcher 2 PW D2CS D2-mod Df2

Description of coordinates Designation of the selected dispatcher Setting the dispatcher pulse width (50 - 300) Assignment of the dispatcher = Va / Vn / Vac Mode: dispatcher = off / on Pulse value (0.001 to 10000)

Unit

Comment(s)

ms 1) 1)

Rolling texts! Press the MODE key to make your changes.

8.3.3 Data interface - Standard

Output Indirect access by pressing the → key 6 times →

1 17 18 27

1) 2)

A B B B

Data 1 S (19) Data 1 D-mod 1 Baudr.

Data 2 T (20) Data 2 D-Mod 1 D-Mod 2 Baudr.

Description of coordinates Designation of the RS 232 C data interface Mode 1: Interface Off / On Mode 2. Data / HP-Deskjet / Epson Data 1: bit rate = (1200 / 2400 / 4800 / 9600) Data 2: bit rate = (2400 / 4800 / 9600 / 19200)

Unit

Comment(s) 2) 1) 1) 1)

Rolling texts! Press the MODE key to make your changes. Data 1: Interface on the front panel. By means of this interface it is possible to read all fields from the corrector or rewrite all programmable fields. Data 2: C1 interface on the rear panel. You can adjust this interface to different printer protocols via the "D mod2" field or handle it like the "Data 1" interface.

21


8.3.4 Data interface for gas (DSfG) - Option

Output Indirect access by pressing the â&#x2020;&#x2019; key 6 times

1

A

S (19) Data 1/ Front

Description of coordinates Designation of the RS 232 C data interface Data 1: front panel for service laptop computer Mode 2: Data (for PC) / HP DeskJet / EPSON Bit rate = 300 / 600 / 1200 / 2400 / 4800 / 9600 Designation of the RS 232 C data interface Data 2: rear panel for printer connection Mode 1: interface off / on Mode 2: Data (for PC) / HP DeskJet / EPSON Bit rate = 2400 / 4800 / 9600 / 19200

Unit

Comment(s) 2)

3 4 9

B B A

D mod2 Baud rate Data 2 / C1

10 11 12

B B B

D mod1 D mod2 Baud rate

1) 2)

Rolling texts! Press the MODE key to make your changes. Data 1: Interface on the front panel. By means of this interface it is possible to read all fields from the corrector or rewrite all programmable fields. Data 2: C1 interface on the rear panel. You can adjust this interface to different printer protocols via the "D mod2" field or handle it like the "Data 1" interface.

1) 1) 2) 1) 1)

Output Indirect access by pressing the â&#x2020;&#x2019; key 7 times 1

A

2 4 5 6 7 8 9 10 11 12 .... 29 30

B B B B B B B B A A

1) 2) 3)

22

A A

T (20) Data 6 / C2 D mod1 Baud rate Stop bit Parity DSfG address Preset: Source addr. Source preset: Event 1 Time 1 .... Event 10 Time 10

Description of coordinates Designation of the RS 485 data interface Data 6: rear panel for DSfG application Mode 1: interface off / on Data 6: bit rate = 2400 / 4800 / 9600 / 19200 Stop bit setting = 1 / 2 Parity bit setting Address of the ERZ 9004 on the DSfG bus (1 to 31) Identification of the ERZ 9004 for the PTB stamp Address of the device sending data to the ERZ 9004 Identification of the device sending data to the ERZ 9004 Log for remote adjustments via the DSfG interface Log for remote adjustments via the DSfG interface .... Log for remote adjustments via the DSfG interface Log for remote adjustments via the DSfG interface

Unit

Comment(s) 2)

Rolling texts! Press the MODE key to make your changes. Heading, no writing into this data field. Log for remote adjustment via data transmission when using the DSfG interface.

1) 1) 1) 1)

3) 3) .... 3) 3)


8.4

Totalizers

Totalizer â&#x2020;&#x201C; Direct access 1 2 3 5

A A A A

U (21) Vn Vac Va VacD

6 7 17 20 21 25 26 27 28 29 30 43 44 45

A A E B B E E E E E E A A A

VnD VaD TOT.-mod If - Va If - Vn Vac-set Vn-set Va-set VacD-set VnD-set VaD-set FVac FVn FVa

Description of coordinates Main totalizer for standard volume Main totalizer for corrected volume at actual conditions Main totalizer for uncorrected volume at actual conditions Disturbing quantity totalizer for corrected volume at actual conditions Disturbing quantity totalizer for standard volume Disturbing quantity totalizer for uncorrected volume at actual cond. Mode: main totalizers = alarm stop / alarm run(ning) Totalizer factor output contact 1 (Va) = 1 / 10 / 100 / 1000 / 10000 Totalizer factor output contact 2 (Vn) = 1 / 10 / 100 / 1000 / 10000 Setting: main totalizer for corrected volume at actual conditions Setting: main totalizer for standard volume Setting: main totalizer for uncorrected volume at actual conditions Setting: disturbing quantity totalizer for corr. volume at actual cond. Setting: disturbing quantity totalizer for standard volume Setting: disturbing quantity totalizer for uncorr. vol. at actual cond. Freeze: corrected volume at actual conditions Freeze: standard volume Freeze: uncorrected volume at actual conditions

Unit m3 m3 m3 m3

Comment(s) 2) 2)

m3 m3

m3 m3 m3 m3 m3 m3 m3 m3 m3

1) 3) 1) 1) 2) 4) 4) 4) 2) 4) 4) 4) 2)

The number of digit positions preceding or following a decimal point depends on the size of the flow meter preset in the ID data field.

Vn Va Vac 1) 2) 3)

4)

Size <= G 2500 Digit positions preceding / following a decimal point 10 3 9 3 9 3

Size > G 2500 Digit positions preceding / following a decimal point 11 2 10 2 10 2

Rolling texts! Press the MODE key to make your changes. ECL G7 (J19) = no: The field is not displayed. Tot-mod = alarm stop: In the event of an alarm (Annex C) the main totalizers stop and the disturbing quantity totalizers start to run. Tot-mod = alarm run: In the event of an alarm (Annex C) the main totalizers continue to run and in addition to this, the disturbing quantity totalizers start to run. To set the totalizer, you must first input the code number and then set the calibrations witch to "Input". Example: see Annex C. Attention! Observe the sequence of operations.

23


8.5

Test

Test ↓ Direct access V (22) CVn CVac CVa FVacD FVnD FVaD

Description of coordinates Calibration during operation: totalizer for standard volume Calibration during operation: totalizer for corr. volume at operat. cond. Calibration during operation: totalizer for uncorrected Va Freeze: Va disturbing quantity, corrected Freeze: Vn disturbing quantity: Freeze: Va disturbing quantity, uncorrected

Unit m3 m3 m3 m3 m3 m3

Comment(s) 2) 1) 2) 2) 1)

1 2 3 43 44 45

A A A A A A

1) 2)

Fault corr G7 (J19) = “no“: The field ist not displayed. The totalizer can be started and stopped independetly of the main totalizer via the TEST key. See also Chapter “TEST“ Key Special Function. Indication of running time of the totalizers for calibration during operation.

3)

24


8.6

ID display

+ -

,

↓ Direct access 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 25 26 27 28 29 30 31 32 33 34 35 36 37 38

A A A A A A A A A A A A A A A A A A A E E E E E E E E E E E E E E

W (23) Designation ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID ID Designation p-type p-No. p-min p-max t-type t-No. t-min t-max M-type M-No. Q-min Q-max M-size QminHP

Description of coordinates ID header line 1st line of ID data: pressure range 2nd line of ID data: temperature range 3rd line of ID data: volume meter size (G) 4th line of ID data: flow rate range 5th line of ID data: volume meter pulse value 6th line of ID data: error correction (error curve linearization G7) 7th line of ID data: type of volume meter 8th line of ID data: serial No. of volume meter 9th line of ID data: type of pressure transmitter 10th line of ID data: serial No. of pressure transmitter 11th line of ID data: type of temperature transmitter 12th line of ID data: serial No. of temperature transmitter 13th line of ID data: QminHP 14th line of ID data: Rho<HP 15th line of ID data: Rho>HP 16th line of ID data: gas type 17th line of ID data: serial No. of corrector ID bottom line Input field: G1151AP / G1151GP / 2088A / 3051CA Input field: serial No. of pressure transmitter Input field: lower adjusting value of pressure transmitter Input field: upper adjusting value of pressure transmitter Input field: AGG Ex / Q/4407 / PT100 Input field: serial No. of temperature transmitter Input field: lower limiting value of temperature transmitter Input field: upper limiting value of temperature transmitter Input field: TRZ / DKZ / WBZ08 Input field: serial No. of volume meter Input field: lower limiting value of volume meter Input field: upper limiting value of volume meter Input field: volume meter size (G) Input field: lower limiting value of volume meter above high pressure Input field: min. density at actual conditions above high pressure Input field: max. density at actual conditions above high pressure Input field: natural gas / ethylene / oxygen / hydrogen / nitrogen Input field: volume meter pulse value

39 40 41 42

E E E E

RhominHP RhomaxHP Gas type PV

1)

Rolling texts! Press the MODE key to make your changes.

Unit

Comment(s)

bar °C m3/h I/m3

m3/h kg/m3 kg/m3

1) bar a bar a 1) °C °C 1) m3/h m3/h m3/h kg/m3 kg/m3 1) I/m3

For more information, please refer to Chapter 4.

25


8.7

Mode

+ -

,

Indirect access by pressing the â&#x2020;&#x2019; key 1 2 3 4

A A B E

X (24) Heading Time: Date: Code

5 6

A B

Oph F-mod:

7 8 9 10 11 12 13 14 15

B B B A B B B B B

F-time: F-date: F-rep.: F Pr-mod1: Pr-mod2: Pr-mod3: Pr-start: Auto-rep:

16 17 18

B A B

Rev.-rep: LP ><Cont.:

19 20 21 22 23 24 25

B A A E E B E

Display-mod: Comp. type: V Comp. No.: AD-corr.: RTC-corr.: f-Vol

26

E

f-Den

27 28

A A

Lamptest bottom Lamptest top

1) 2)

3) 4) 5)

26

Description of coordinates Mode Current time Current date User code (can only be defined if slide switch is set to "Input") Indication of operating hours Freeze mode = manual or automatic (min / hour / day / week / month) Time: Freeze start Date: Freeze start Repetition rate for automatic freezing Indication of time / date of the last freeze operation Print initiation via internal clock or external contact Switching over between automatic and revision print Manual printout or channel data report Start time for automatic printout Repetition time for automatic printout (0, 1, 2, 3, 4, 6, 12, 24) Repetition time for revision printout (1 to 99) Last print time Limiting contacts: Definition of coordinate (assignm. to a meas. value) Active display time (30 min / 6h - 18h / continuous duty) 9004 Software version: Version No. / date Serial number Correction factor for AD measurement Correction factor for real-time clock Internal clock frequency (quarz divided by 12) for volume frequencies Internal clock frequency (quarz divided by 12) for density frequencies Lamp test of bottom line of display Lamp test of top line of display

Unit

Comment(s)

hours 1) 2)

2) 1) 1) 3) 1) hours

5)

minutes 4) 1)

1) Hz Hz

Rolling texts! Press the MODE key to make your changes. If F-mod = "manual" is selected, the F-rep mode is not active. If F-mod = "minute, hour, day, week, or month" is selected, the freeze operation is carried out periodically in connection with the field X9. See also Chapter '"Test" Key Special Function'. Printing is automatically carried out in connection with the field X15 or as revision printing in connection with the field X16. Select the measured value whose <. and >. limit contacts should be available as output contacts. Repetition time = 0: printing is carried out only once a day at the set start time.


8.8

Clear / Fault

â&#x2020;? â&#x2020;&#x201C; Direct access 1 2 3 4 5 6 17

A A A A A A B

Y (25) Heading Status Time: Date: Clear fault(s)? CF Fault mode:

Description of coordinates Fault indication Fault No. / fault text or "no fault" for undisturbed operation Time of the first fault message Date of the first fault message Indirect clearing function Indication of the time of clearing the last faults Fault clearing mode = direct / indirect

Unit

Comment(s)

1)

1) Rolling texts! Press the MODE key to make your changes. For more information, please refer to Chapter 5.

27


Annex A

Function Chart for the ERZ 9004 Volume Corrector

ERZ 9004 Printer Controller Recorder Display

(t)

(p) PT (2x Va) FM

Transmission Pulses / current – Current Devices: FM PT TT ERZ

= Vortex meter, turbine meter or = Pressure transmitter = Temperature transmitter = Computer

Indications / outputs Va Vn p t T K pn Tn

= Volume at actual conditions (m3) = Standard volume (m3) = Pressure (bar) = Temperature (°C) = 273.15 (K) + t = Compressibility factor = Standard pressure (bar) = Standard temperature (K)

Formula:

Vn = Va ⋅

28

p ⋅ Tn pn ⋅ T ⋅ K

TT


Annex B

Survey of Equations Used

Volume at actual conditions = Volume at actual conditions (m3) Va = Volume pulse pV = Meter factor (pulses/m3) KV = Va totalizer factor (output contact only) KZ1 Volume correction factor VCF = Volume correction factor = Standard volume Vn = Volume at actual conditions Va p = Absolute pressure T = Temperature Tn = Standard temperature pn = Standard pressure K = Compressibility factor

(m3) (m3) (bar) (Kelvin) (Kelvin) (bar)

Compressibility factor K = Compressibility factor Za = Real gas factor Zn = Real gas factor at standard conditions Calculation is made in accordance with AGA-NX 19.

Va =

pV 1 ⋅ K V K Z1

VCF =

K=

Vn p ⋅ Tn ⋅ Va pn ⋅ T ⋅ K

Za Zn

Standard volume Vn = Standard volume (m3) = Volume at actual conditions (m3) Va VCF = Volume correction factor = Vn totalizer factor (output contact only) KZ2

Vn = Va ⋅ VCF ⋅

Volume flow rate at actual conditions QVa = Volume flow rate at actual cond. = Volume transmitter frequency fV = Meter factor KV

(m3/h) (Hz) (pulses/m3)

Q Va =

fV ⋅ 3600 KV

Standard volume flow rate = Standard volume flow rate QVn = Volume transmitter frequency fV = Meter factor KV VCF = Volume correction factor

(m3/h) (Hz) (pulses/m3)

Q Vn =

fV ⋅ VCF ⋅ 3600 KV

1 K Z2

Gas meter error curve linearization Polynominal Linearization is made using a quartic polynominal which simulates the error curve of the gas meter. Error equation:

E = A-2 * qa-2 + A-1 * qa-1 + A0 + A1 * qa + A2 * qa2

E = Deviation of the error curve (%) qa = Volume flow rate at actual cond. (m3/h) An = Constants The following values are permanently programmed in the computer:

A1: 10-4

A2: 10-8

The constants An (n = -2 to n = 2) are calculated from the measured value pairs error Ei and flow rate qai. Instead of the constant meter factor KV’ the corrected meter factor KVc is used for subsequent E   calculation or correction. K = K ⋅  1+  Vc

V

100 

Thus, the volume flow rate at actual conditions QVa is calculated from the following equation: f Q Va = V ⋅ 3600 fV = Volume transmitter frequency (Hz) K Vc KVc = Corrected meter factor (pulses/m3 )

29


Annex C

Operating Examples

Displaying measured values and constants 1. example Press the PRESSURE key P I

34,26 13,50

bar a mA

P P-min

34,26 10,00

bar a bar a

p min

P P-max

34,26 50,00

bar a bar a

p max

T T-max

10,57 30,00

bar a mA

T max

m3/h m3/h

qa max

Press ↓

Press ↓

Press →

Press → qa 734,26 qa-max 3600,00 2. example Press the C FACTOR key VCF K

55,41 0,988

VCF K-mod

55,41 AGA

VCF CO2-H

55,41 xx,xx

Press ↓ 3 times

Press ↓ twice %

Press ↓ VCF 55,41 Rhon-H x,xxx

kg/m3

VCF Hon-H

55,41 xx,xx

kWh/m3

VCF N2-H

55,41 xx,xx

%

Press ↓

Press ↓

30


Programming a new constant You want to change the p-max value to 41,50 bar. Press the Pressure key P I

34,26 13,50

bar a mA

P P-max

34,26 50,00

bar a bar a

Press ↓ twice P max range

Set the SWITCH to “Input“ Press the Enter key.

The bottom line of the display turns darker and the POWER / STANDBY LED flashes at one-second intervals to indicate the programming mode.

Press the “4“ key

Press the “1“, “± “, “5“ and “0“ keys consecutively.

P P-max

34,26 4....

bar a

P P-max

34,26 41,50

bar a

P P-max

34,26 41,50

bar a bar a

Press the Enter key The display turns bright and the unit is indicated again.

Lock the data inputted by means of the SWITCH. Programming is completed! General information about inputting new values: If a value is locked with the code number (user data), you must first input the correct code number into the appropriate field (X4) in the MODE function (see example on Page 42). You can input values either in the short designation or coordinate display mode. Switching over is possible at any time by pressing the SELECT key. Programming current / dispatcher outputs Current outputs You can select the desired values in the columns M11, N11, O11, P11 via the OUTPUT function key and the cursor keys. To input coordinates, you must input the appropriate digits (A = 01, B = 02, etc.) instead of the letters of the columns concerned (A, B, etc.). However, you can only connect the fields 1 and 2 of the columns A to L to one current output! Example: You want to output the standard volume flow rate (field 1, column K) to current output 1. (Column K corresponds to the number 11; see Page 11 Flow Rate 2 column) 1) Press the OUTPUT key. 2) Press ↓ four times ("O1-CS K-1" is indicated on the bottom line of the display). 3) Press the ENTER key. (The display switches over to "O1-CS 11-1"). 4) Input the key sequence "1" "1" "1" (for field K1) into the field M11. (The first two digits stand for the column and the third digit stands for the field.) 5) Press the ENTER key. Dispatcher outputs Programming dispatcher outputs is analogous to the procedure for programming current outputs.

31


Programming a new mode You want to change the mode of the pressure transmitter from 0-20 mA to 4-20 mA. Press the PRESSURE key.

p Ip

34.26 13.50

bara mA

p 34.26 p-mod1 0-20

bara mA

Press â&#x2020;&#x201C; nine times.

Set the SWITCH to "Input". The POWER / STANDBY LED flashes at one-second intervals to indicate the programming mode, and after you have pressed the ENTER key, the bottom line of the display turns darker. Press the MODE key. p 34.26 p-mod1 4-20

bara mA

The setting changes from 0-20 mA to 4-20 mA.

Press the ENTER key and lock the data inputted by means of the "Input" SWITCH.

Setting main totalizers You want to set the main totalizer Va to 100000. First input the code number and then set the SWITCH to "Input". Press the TOTALIZER key. Vn 000004321.985 m3 Va 00000346.987 m3 Press â&#x2020;&#x201C; so many times until "Va-set" appears.

Vn 000004321.985 Va-set 0

m3 m3

Press the ENTER key. The bottom line of the display turns darker and the POWER / STANDBY LED flashes at one-second intervals to indicate the programming mode. Press the keys "1" "0" "0" "0" "0" "0" consecutively. Press the ENTER key. Vn 000004321.985 Va-set 100000

m3 m3

After the data have been transferred, "Va-set" returns to "0". Then lock the data inputted by means of the "Input" SWITCH. Setting and resetting disturbing quantity totalizers is performed in the same way. NOTE: If you set the mode in the column J19 (ECL G7) to "polynominal" or "load points", the sequence of the totalizers changes, since additional totalizers are inserted for the corrected volume at actual conditions (see also chapter 8.4).

32


Enabling programming Code number to enable user access First press the MODE key and then the â&#x2020;&#x2019; key. The time is indicated. Mode Time: 12-48-10 Press â&#x2020;&#x201C; twice. Press the ENTER key and input the appropriate digits.

Mode Code **** - **** Code

Mode *

The digits inputted remain invisible. Each digit is marked with an asterisk. Press the ENTER key to complete the data input. Code

Mode **** - ****

If the code number is correct, the POWER / STANDBY LED on the front panel starts to flash at one- second intervals. If the code number is incorrect, the display returns to

Code

Mode **** - ****

Repeat the operation using the correct code number! The computer enables you to access user data. To change data, you must select the desired coordinate on the bottom line of the display and press the ENTER key. The brightness of the bottom line is reduced to indicate that access to the coordinate field is enabled. If you want to lock the computer again after having completed your programming, press the CLEAR / FAULT key twice quickly. If you forget to do so, the computer itself disables access after approx. 30 minutes. It is possible to change the code number if the sealable slide switch is in its "Input" position. Sealable switch for the Office of Weights and Measures When the switch is operated, the POWER / STANDBY LED starts to flash at one-second intervals and access to the memories (incl. code number) is enabled. To change data, you must select the desired coordinate on the bottom line of the display and press the ENTER key. The brightness of the bottom line is reduced to indicate that access to the coordinate field is enabled.

33


Annex D

Technical Data

Inputs Analog inputs:

14½-bit resolution. Accuracy ± 1 bit, measuring period approx. 100 ms.

Volume frequency:

16-bit resolution. Range from 0.05 Hz to 20 kHz or metering from 0 Hz.

Frequency inputs:

23-bit resolution, reciprocal measuring method range from 0.05 Hz to 25 kHz.

Digital inputs:

Status signals, passive contact mechanism (relay or open collector), load 5 V, 20 mA.

Status signals:

tdhigh > 1 s

tdlow > 1 s

Outputs Analog outputs:

14±1-bit resolution, load 800 ohms, electrically isolated.

Digital outputs:

Limiting value 24V 100mA Dispatcher Pulse width adjustable from 50 ms (10 Hz) to 300 ms (1.5 Hz). Output frequency from 0 to 10 Hz, electrically isolated open collector. Totalizer pulses Pulse width of approx. 150 ms (3 Hz), pulse width not adjustable. Electrically isolated open collector. Fault / Warning Contact assemblies (principle of closed-circuit current).

Power supply Switched-mode power supply unit with 40 kHz clock frequency. All secondary voltages are electrically isolated from each other. Charging unit for standby battery. Standard power supply unit:

24 V DC (21 V to 27 V), power input approx. 31 W

Special version:

230 V AC (-10% to +6%), power input approx. 31 W

Internal battery (option):

The standby battery sustains the power supply of the ERZ 9004 including transmitters for approx. 30 minutes. After a discharge, the battery attains its full power after approx. 10 hours.

Ambient temperature Temperature range:

-20°C to +60°C

Weight & dimensions Rack-mounting unit:

Height 3 units, width 213 mm, depth 295 mm (without connectors) weight excl. battery approx. 3.2 kg, weight incl. battery approx. 4 kg

Wall-mounting unit:

Height 245 mm, width 340 mm, depth 260 mm weight excl. battery approx. 3.7 kg, weight incl. battery approx. 4.5 kg

34


Interfaces Without handshake lines, communication is made via Xon / Xoff. Short-circuit-proof.

Rack-mounting unit Front panel:

Front interface RS 232 C as service interface 9-pin Cannon connector transmission rates from 1200 to 9600 baud 1 start bit, 1 stop bit, 8-bit data, no parity

Rear panel:

C1 interface RS 232 C as service or printer interface 9-pin Cannon connector transmission rates from 2400 to 19200 baud 1 start bit, 1 stop bit, 8-bit data, no parity C2 interface (option) RS 485 as standard data communication (DSfG) interface 9-pin Cannon connector transmission rates from 2400 to 19200 baud 1 start bit, 8-bit data parity bit setting: off / even / odd stop bit setting: 1 / 2

Wall-mounting unit Front panel:

Front interface RS 232 C as service interface 9-pin Cannon connector transmission rates from 1200 to 9600 baud 1 start bit, 1 stop bit, 8-bit data, no parity

Rear panel:

Interface in the terminal compartment Max. one interface. Screw terminals in the terminal compartment. There are the same interfaces available as with the rack-mounting unit.

CPU CPU:

80C537 / 12 MHz

Memory areas:

a) b) c) d)

Official calibration data: non-volatile memory C-MOS RAM, 2 kilobytes User data: non-volatile memory C-MOS RAM, 2 kilobytes Totalizer memory: non-volatile memory C-MOS RAM, 512 bytes Program memory: EPROM 64 / 128 kilobytes

35


Pulse counting

Block diagram Measurement

16-bit pulse counter measuring channel

Volume transmitter input

16-bit pulse counter reference channel

Reference measurement

Difference formation feature

16-bit missing-pulse counter difference betw. meas. & ref. channel

Selector switch 250 kHz

Clock changing

Pulse counting with 10 / 10000 comparison

16-bit measuring pulse counter Locking 32-bit reference pulse counter

Pulse frequency measurement to calculate the flow rate

1 MHz Control unit Start Stop

Description of pulse frequency measurement To calculate the flow rate, the frequency of volume pulses is determined by means of a period measurement. A selector switch samples the measuring and reference channels in such a way that a frequency and thus a volume flow rate can be determined from both pulse frequencies (irrespective of the mode 1:1 or X:Y). Clock frequency changing (250 kHz / 1 MHz) allows to change the measuring resolution or the measuring period in connection with the chosen volume transmitter (vortex meter = long gate time). Measurable frequency, min.: Measurable frequency, max.:

0.05 Hz 20 kHz

1:1 operating mode There is the same number of pulses per time unit (or per rotation of the turbine wheel) on both channels. The input pulses must be out of phase (90째 to 270째). The difference formation feature alternately compares the measuring and reference pulses. Every deviation is counted by the missingpulse counter. If the preset limiting value (e. g. 10 pulses) is exceeded, an alarm is tripped. If the limiting value is not exceeded within a presettable period (e. g. 10000 pulses), the missing-pulse counter is set to zero. X:Y operating mode The number of pulses per time unit (or per rotation of the turbine wheel) is not the same on both channels. The input pulses may have any phase angles. Differences are formed only via the software. The deviation results from the ratio of the measuring wheel and reference wheel parameters inputted. In the event of a deviation > 4%, an alarm is tripped. Storing quantity pulses / Electronic totalizers The counted and evaluated pulses are stored threefold in a non-volatile memory (C-MOS RAM). A cyclic 1-out-of-3 comparison checks the contents of the memory locations for equality. In the event of one value deviating from the other two values, an alarm is tripped and the wrong value is overwritten with the contents of the coinciding memory locations. This applies to all Va, Vn and Vac totalizers.

36


Analog inputs Dual-slope analog-digital converter with 14½-bit resolution corresponding to 20000 steps. A multiplexer which can sample a maximum of 6 analog inputs is located upstream of the A/D converter. Four inputs are designed for current measurement and two inputs for resistance measurement using four-wire technology with open-circuit monitoring. Analog outputs Digital-analog converters with 14-bit resolution. There is one electrically isolated converter for each current output. Battery standby supply Block diagram

Controller and driver

24 V DC

40 kHz clock frequency

5 Volt 2 A

5 Volt 0.1 A

24 Volt 0.1 A

Battery charger

Monitoring unit

Power valid

Relay Battery low

Internal battery (option) The power supply of the entire device and the transmitters is sustained for max. 30 minutes if the battery is fully charged. Recharging the battery after a discharge takes approx. 10 hours. To activate the internal battery, set the following jumper: Rack-mounting unit: Wall-mounting unit:

Connector J4, jumper between 9 and 10. Jumper between A2 and A6.

Afterwards, the device must be supplied with 24 V or 230 V one time. Only then will the battery sustain the power supply of the device in the event of a power failure. External battery If an external battery is installed, we would recommend using 2 series-connected lead-gel batteries (8 V-1.1 Ah). The charging voltage of the ERZ 9004 is 18.2 V. When choosing the batteries, make sure that trickle charging is possible. If this is not possible, the batteries must be loaded regularly, i.e. loading the battery by disconnecting the device from the power supply. To activate the external battery, set a jumper between P14 1 and 2 in the ERZ 9004.

37


Annex E

Terminal Diagrams Terminal assignments - Inputs of the rack-mounting unit

38


Terminal assignments - Outputs of the rack-mounting unit

39


Terminal assignments - Inputs of the wall-mounting unit

40


Terminal assignments - Outputs of the rack-mounting unit

41


Annex F

Wiring Examples

Pressure transmitter input ERZ 9004

Connector J5

Transmitter

1

24 V

+

2

+

-

3

-

Pressure PE

Active current input ERZ 9004

Connector J5

Transmitter

1

24 V

+

2

+

-

3

-

Pressure PE

Temperature transmitter input ERZ 9004

Connector J6

Transmitter

1

3

2

4

Pt 100 -

3

1

V -

4

2

V+ Pt 100 +

PE

42

100 ohms

PT 100 100 ohms


Volume measurement input Vortex meter ERZ 9004

Connector J7

+ -

Connector WA1

Connector W1

Connecting box

7

A

A

1

8

B

C

2

B

3

WBZ 08

f

PE J7

W2 K

H

4

10

J

K

5

J

6

+ -

WA1

9

f

Turbine meter (external explosion-protected isolation) ERZ 9004

Connector J7

+ -

Connector TA1

Connector

7

A

K

6

8

B

H

3

J7

TA1

HF3

T1

9

K

C

6

10

J

A

3

+

TRZ 03

PE

PE

-

Connector T1

HF2

Turbine meter (explosion-protected isolation in the ERZ 9004) ERZ 9004

+ -

Connector [EEx i] J9

Connector

1

6

2

3

TRZ 03

HF3

PE J7

+ -

3

6

4

3

HF2

43


Outputs Analog output (Example: Current output 1) ERZ 9004

A

Connector J4

1

+

Load RL = 1 kâ&#x201E;Ś

2

-

PE

Relay output (Example: Fault output) ERZ 9004

Connector J3 9

Break contact

10

Root

11

Make contact

PE

Contact output (Example: Volume at actual conditions) Connector J3

1

Va

MRG, FWA, etc.

2

PE Power supply via batteries ERZ 9004

-

Connector J4

1

9

P14

+

44

2

ERZ 9004 1

Connector J4 9

P14

10

2

10


Annex G

Fault List

FAULT MESSAGES No.

Text displayed

Explanation

General 02 03 04 05 06 07 08 09 10 11 12-15

Power failure Defective clock EEPROM fault A/D hardw. 517 A/D hardw. 7135 Watchdog AGA iter. 1 AGA iter. 2 AGA limit. 8279 fault

Power failure Clock component in the ERZ 9004 is defective Fault detected when checking the EEPROM Hardware fault A/D measurement 517 Hardware fault A/D measurement 7135 Program runtime exceeded AGA-NX 19 iteration 1 AGA-NX 19 iteration 2 AGA-NX 19 limiting values 8279 fault Spare

Volume measurement 16 17 18 19 20 21

Pulse comp. 1:1 Pulse comp. x:y Miss.pulse meas. Miss.pulse ref. qVa min range qVa max range

22 23 24 & 25

Delta qVa Delta Kvc max

Pulse comparison 1:1 Pulse comparison x:y Missing pulses of the measuring channel Missing pulses of the reference channel Min. range of volume flow rate at actual conditions violated Max. range of volume flow rate at actual conditions exceeded Delta fault of volume flow rate at actual conditions Kvc delta fault Spare

Analog inputs 26 27 28 29 30 - 41 42 43 44 45 46 - 49

p hardware p min range p max range p delta T hardware T min range T max range T delta

Pressure hardware Min. pressure range violated Max. pressure range exceeded Pressure delta fault Spare Temperature hardware Min. temperature range violated Max. temperature range exceeded Temperature delta fault Spare

Totalizers 50 51 52 53 54

1 out of 3 Va 1 out of 3 Vn 1 out of 3 Vac

55 56

1 out of 3 VnD 1 out of 3 VacD

57 - 69

1 out of 3 VaD

1-out-of-3 comparison volume at actual conditions 1-out-of-3 comparison standard volume 1-out-of-3 comparison corrected volume at actual conditions Spare 1-out-of-3 comparison disturbance of volume at actual conditions 1-out-of-3 comparison disturbance of standard volume 1-out-of-3 comparison disturbance of corrected volume at actual conditions Spare

45


WARNINGS No.

Text displayed

Explanation

Totalizers and flow rate 70 71 72 73 74 75 76 77 78 & 79

Dispatcher 1 Dispatcher 2 el.mech. TOT. 1 el.mech. TOT. 2 qVa min limit qVa max limit qVn min limit qVn max limit

Dispatcher output 1 Dispatcher output 2 Output contacts of totalizer Va Output contacts of totalizer Vn Min. limit of volume flow rate at actual conditions violated Max. limit of volume flow rate at actual conditions exceeded Min. limit of standard volume flow rate violated Max. limit of standard volume flow rate exceeded Spare

Current outputs 80 81 82 83 84 85 86 87

I1 out min I2 out min I3 out min I4 out min I1 out max I2 out max I3 out max I4 out max

Current output 1 min. violated Current output 2 min. violated Current output 3 min. violated Current output 4 min. violated Current output 1 max. exceeded Current output 2 max. exceeded Current output 3 max. exceeded Current output 4 max. exceeded

Limiting contacts 88 89 90 - 95 96 97 98 & 99

46

p min limit p max limit T min limit T max limit

Min. limit of pressure violated Max. limit of pressure exceeded Spare Min. limit of temperature violated Max. limit of temperature exceeded Spare


Annex H

Data Interface for Gas (DSfG) - Option

All ERZ 9004 devices can be upgraded for operation on the DSfG bus. The interface is to be set in the field T. Setting parameters: Bit rate: DSfG address: Master (Y/N):

Normally 9600 baud Transport address 1 - 31 Setting to define whether the device should be the BUS MASTER.

Software The status of the software corresponds to the present-day status of specifications of the DVGW working committees, i.e. all layers up to layer 6 comply with the DSfG standard; currently, only customer-specific standard inquiries can be handled in layer 7. Hardware The hardware complies by 100% with the DSfG standards. Example of a typical DSfG configuration: Printer

FE - 06 RS 232c

RS 232c

RS 232c

RS 232c Corrector 1

Corrector 2

Corrector 3

DSfG bus

Data logger for measured values

Additional bus access points for an inspection laptop computer, for example

Rem. data transm. MODEM

Telephone line

MODEM Central station

47


Electrical characteristics As to its electrical characteristics, the DSfG interface is based on the EIA RS 485 standard (differential voltage signals via a twisted pair of wires). The DSfG network with its scheduled bus topology makes it possible to connect up to 31 users. The length of the bus (main bus line) may be up to 500 m. The individual DSfG users are to be interfaced with the bus via spur lines with a maximum length of 5 m. Connector pin assignments On the side of the ERZ 9004, the DSfG interface has been designed as a 9-pin male Cannon connector. Provide the spur line with a 9-pin female connector and screw it together with the device connector. Contact assignments are as defined in the table below: Pin No. Signal Description ————————————————————————————————————————————— 1 +U Optional power supply (+5 V DS) for external power supply of the bus 2 GND Reference potential of the electronic interface system, electrically isolated from device 3 R/TA “A“ wire of the pair of wires 4 — not assigned 5 SGND Reference potential of the bus connection, identical to GND 6 -U Reference potential of +U, identical to GND 7 GND Reference potential of the electronic interface system, electrically isolated from the device 8 R/TB „B“ wire of the pair of wires 9 PE Earth of the device, potential equal to protective earth Assign the pins 1, 3, 5 and 8 for wiring the female connector to the spur line. There is the possibility for connecting bus power supply, generation of open-circuit potential and a bus terminating resistor in the device concerned via switches. In order to avoid that the calibration seal must be opened only to actuate these switches when installing the bus, all correctors are supplied with switched off switches. The terminating resistors and the generation of open-circuit potential are to be connected externally, while the power supply of the bus is to be preferably provided by the control station (i.e. the bus master of the protocol layer 2). This may be the measured-data recording device or the remote data transmission unit. Bus cable The bus spur line serves as a connection between the device and the bus. There are 9-pin female Cannon connectors available on both sides of the cable with a maximum length of 5 m. The cable contains 2 pairs of wires which are twisted together and shielded in each case. The nominal cross section per wire must be at least 0.14 mm², while the capacitance must be below 150 pF/m. In most cases, the shield is connected on one side to the metal core of the female connector. This single-sided connection of the shield is required to avoid earth loops. In order to prevent interfering radiation, further measures may be necessary in the individual case, such as double-sided shielding and, parallel to this, separate potential equalization. The main bus cable, whose total length is limited to 500 m, contains two pairs of wires. Each pair of wires is twisted together and shielded. The nominal cross section per wire must be greater than 0.25 mm², while the capacitance must be below 150 pF/m. The shield of the main bus cable is to be connected at one point (preferably at the end) to a bonding strip. Even here it applies that in order to prevent interfering radiation, further measures may be necessary in the individual case, such as double-sided shielding and, parallel to this, separate potential equalization.

48


Bus termination and generation of open-circuit potential In order to prevent distortion and reflection of signals, terminating resistors must be connected on both sides of the bus cable. These terminating resistors should correspond more or less to the wave impedance of the line with typical values between 120 and 150 ohms. In addition to the terminating resistors, there is at least one network necessary for generating the open-circuit potential (4 x 470 ohms). The basic circuit is illustrated by the following figure:

+U

470 Ω

120...150 Ω

R/TA

R/TB

470 Ω

120...150 Ω

SGND

49

/erz9004_manual_gb  

http://www.rmg.com/uploads/myth_download/erz9004_manual_gb.pdf

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