Understanding The Working Of A Strip Chart Recorder
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Overview
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Strip Chart Recorders make use of long strip or roll of paper to archive data points over a time period. One or more sensors acquire data. Strip chart makes use of one or more pens to plot data linearly as chart passes through uniform speed. Benefits of strip chart recorders are real-time output, ease of operation and hardcopy produced by the device.
What Is A Strip Chart Recorder? The strip chart recorders are roll or strip of paper that archives data points over an interval. By using data acquired by one or more than sensors, strip chart recorders use one or more pen to plot the data linearly as the chart passes at a uniform speed. Strip chart recorders advantages in the process of operation with ease and by providing real time output.
Strip Chart Recorder Technology
Strip chart recorders give you data. Data is produced by using special sensors attached to the recorder. Sensor types include current, strain gauge or bridge, humidity, pressure, level, pH, pressure and temperature, among others.
Some Of The Distinct Types Of Strip Chart Recorders Manufactured By G-tek Are
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STC 1P-2P – Strip Chart Recorders for up to 2 Process Parameters STC 3P – Strip Chart Recorders for 3 Process Parameters
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STC 1P-2P – Strip Chart Recorders for up to 2 Process Parameters
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The SR2000 series of STRIP chart recorders are available for recording up to 2 process parameters simultaneously. This strip chart recorder advantages and is very useful to monitor your process unattended. These recorders are widely used in process industry for monitoring of various processes like annealing, curing, hydro testing etc. This strip chart recorder advantages by providing 100mm chart width, one to three analogue input channel, 10-3600mm/hr of chart speed and many other benefits.
Specification
Model No: Strip Chart Recorder – STC 1P-2P Pens
Chart
No. of Pens
1/2
Pen Marking
Continuous
Chart Speed
Pen Response Time
<5Sec (Full Scale)
Chart Calibrated 100mm Radius/Size
Pen Resolution
Stepper Motor Controlled better than 0.1% FSD
Overshoot
None
Chart Ranges
10 mm/ hour to 3600mm/hour
Standard (Refer Table 2) / Customized*
Display, Operator Panels and Input Display Type Display Height
Digital, 8 digit ultra-bright LED Numeric / semi alphabetic 0.3â&#x20AC;?
Status Indicator
Channel number and corresponding parameter values, prompts and messages displayed for ease of setup and programming.
Panel Keys
Front panel KB consisting of 3 keys for programming and calibration
Analog Input
RTD PT-100 / 4-20mA (External Shunt Resistance of 50 Ί 0.1%) / TCJ-K-R-S-T/ 0-1V
Sensor Type and Range
Refer to the Table 1
Protection Input Impedance RTD /Volt/Tc> 20 MΩ mA 50Ω Shunt External CMRR
>100 dB@ 50, 60 Hz at 3 Sample per Second
NMRR
>50 dB@ 50, 60 Hz at 3 Samples per Second
Environmental Temperature (Operation)5°C to 45°C (Limiting) 0°C to 50°C (Storage)-20°C to 60°C (Operation) 10 to 80 % RH Non Humidity Condensing (Storage) 5 to 90 % RH Non Condensing Altitude <2000 meter
Power Requirement Supply Voltage 85-264VAC 47-63Hz (Mains Operated) Battery Yes backup DC Adapter Yes Operated 15W Max With Power Maximum Configuration
Battery Backup 12V 7Ah External Lead Acid battery Battery Charger Yes Battery Reverse Polarity Protected >12 Hrs up to 2 Pen Minimum Back up recorder Battery
Communication RS232 / 485* Protocol Proprietary Baud Rate 4800 Parity None
Overall Dimension Dimension L x W x 160x160x280 D (mm) Panel Cutout (mm) 138×138 (L x W) Bezel (mm) 160×160
Relay Output No of Output Channel Per Board
6 Max
Output Type
Potential free contact; 1 Form C
Configuration
High/Low/High-Low/OnOff (Hysteresis band settable)
Life expectancy
Mechanical:10^7 operati ons
Load
1A, 230VAC resistive
Relay refresh rate
1Sec
Isolation Relay – Relay
2.5 KV 1 Minute
STC 3P – Strip Chart Recorders for 3 Process Parameters
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This strip chart recorders are microcontroller based. The crystal-controlled chart drive ensures accurate chart speed. Apart from the above two distinct features of strip chart recorders can be used in both laboratory and process-measurement applications.
Specification
Model No: Strip Chart Recorder â&#x20AC;&#x201C; STC 3P Pens
Chart
No. of Pens
1/2/3
Pen Marking
Continuous
Chart Speed
Pen Response Time
<5Sec (Full Scale)
Chart Calibrated 100mm Radius/Size
Pen Resolution
Stepper Motor Controlled better than 0.1% FSD
Overshoot
None
Chart Ranges
10 mm/ hour to 3600mm/hour
Standard (Refer Table 2) / Customized*
Display, Operator Panels and Input Display Type
Digital, 8 digit ultra-bright LED Numeric / semi alphabetic
Display Height
0.3â&#x20AC;?
Status Indicator
Channel number and corresponding parameter values, prompts and messages displayed for ease of setup and programming.
Panel Keys
Front panel KB consisting of 3 keys for programming and calibration
Analog Input
RTD PT-100 / 4-20mA (External Shunt Resistance of 50 Ί 0.1%) / TCJ-K-R-S-T/ 0-1V
Sensor Type and Range
Refer to the Table 1
Scan Rate
Continuous 1 reading per second
Protection Input Impedance CMRR NMRR Maximum Common Mode Voltage Isolation Channel – EARTH Input Protection Termination Transmitter Power Supply
RTD /Volt/Tc> 20 MΩ mA 50Ω Shunt External >100 dB@ 50, 60 Hz at 3 Sample per Second >50 dB@ 50, 60 Hz at 3 Samples per Second 5V AC 1.5KV 1 minute 30V AC/DC max Non Interchangeable , Removable Plugs, Individual For Each Input Non Isolated 15V DC; 30mA max, un protected
Environmental Temperature
(Operation)5°C to 45°C (Limiting) 0°C to 50°C (Storage)-20°C to 60°C
Humidity
(Operation) 10 to 80 % RH Non Condensing (Storage) 5 to 90 % RH Non Condensing
Altitude
<2000 meter
Power Requirement Supply Voltage (Mains 85-264VAC 47-63Hz Operated) Battery backup Yes DC Adapter Yes Operated 15W Max With Maximum Power Configuration Fuse Type None
Communication RS 232 / 485* Protocol Baud Rate Parity
Proprietary 4800 None
Overall Dimension Dimension L x W x D 160x160x280 (mm) Panel Cutout (mm) 138×138 (L x W) Bezel (mm)
160×160
Relay Output No of Output Channel 6 Max Per Board Output Type
Potential free contact; 1 Form C
Configuration
High/Low/High-Low/OnOff (Hysteresis band settable)
Life expectancy
Mechanical:10^7 operation s Electrical: 10^5 operations
Load
1A, 230VAC resistive
Relay refresh rate
1Sec
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Strip chart recorder advantages can be an added benefit for processing industry.
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Long period run with adequate chart length. The speed of the chart can be altered in steps. Uniform resolution. Further strip chart recorders can be two types: galvanometer type and null balance type. G-Tek and its strip chart recorders have served various process industries since years of excellence.
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