Type 2390 and 2390B
A5497/IL
2N10065-L A3544-2/il
Figure 7. Printed Wiring Board Connections
Check that you have received the proper Hazardous Area Approval rating on the transmitter. The nameplate on the transmitter (figure 2) specifies the approval agency (if required) for the transmitter.
Direct or Reverse Action Set-Up Verification
A3788/IL
Figure 6. Typical Cageless Sensor Mounting
Pre-installation Requirements Note Caged sensors have a rod and block installed on each end of the displacer to protect the displacer in shipping. Remove these parts before installing the sensor to allow the displacer to function properly.
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Before installing the transmitter, determine that the instrument is set up properly for direct or reverse action. Direct action (increasing level produces an increasing output) or reverse action (increasing level produces a decreasing output) is set up as shown in figure 7, depending on whether the sensor is right- or left-hand mounted. If your transmitter is set up incorrectly, refer to the table in figure 7 before proceeding with the installation. When changing action, the plug must be rotated 180 degrees to insert it in the other socket. (The wires from the plug exit toward the top of the transmitter when in J2 and toward the bottom when in J2.1, in order to engage the locking tangs on the connectors.) On units with an output indicator, the indicator mounting screws may have to be loosened to allow easy access to the J2.1 socket.
Transmitter Orientation Mount the transmitter with the vent opening pointing downward to allow accumulated moisture drainage. The transmitter and torque tube arm are attached to the displacer in either a right- or left-hand mounting style, as shown in figure 8. This can be changed in the field on the 249 Series sensors (refer to the appropriate sensor instruction manual). Changing the mount-