Detcon CXT-IR, Operator'S Installation And Instruction Manual

Page: 45 / 52

Model CXT-IR
CXT-IR Instruction Manual Rev. 2.1 Page 41 of 48
7. Feed the sensor assembly wires and RF cable through the ¾” female NPT port and thread the assembly
into the J-box until tight and the ITM faces toward the front access point. Use the locking nut to secure
the ITM in this position.
8. Re-connect the sensor assembly wires to the shorting blocks by pushing the wire straight into the block
board inside the Junction Box. (Red to red, and black to black. Re-connect the RF cable to the antenna
cable.
9. Re-install the battery holder in the J-box, and re-install the batteries into the housing. Replace the battery
holder cover.
Check and/or perform Zero Calibration and Span Calibration per sections 0
To enter Calibration Mode hold the magnet over PGM1 for 3 seconds. If the sensor is experiencing a fault
condition the “

” prompt will not appear until the fault(s) have been displayed. When the ITM enters Calibration
Mode the display will scroll “ Pgm1=Zero . . . Pgm2=Span ” twice before returning to Normal Mode (about 5
seconds).
10. AutoZero and 3.3.2 AutoSpan.
Troubleshooting Guide
If the ITM detects any functional errors the ITM will display the fault. If the sensor is experiencing a fault
condition a momentary swipe of the magnet will cause the ITM to scroll the fault condition(s) across the display
before the
◄
or
►
prompt will appear.
The Display Error Codes are:
Auto Span Fault
Temperature Fault
Memory Fault
Processor Fault
Clearing Fault
Range Fault
Missing Sensor Cell Fault
Sensor Fault
Zero Fault
Low Battery Fault
Some faults are self-explanatory, and if these faults occur and cannot be cleared the ITM should be replaced first
to see if the fault will clear. Other faults may need further investigation. Some of the sensor problems, associated
error codes, and resolutions are listed below.
Missing Sensor Cell Fault
Probable Cause: The sensor cell is not installed, is installed incorrectly, or is nonoperational.
•
Replace the Sensor Cell with a known good Sensor Cell.
Sensor Fault
Probable Cause: The sensor optics have become too dirty to support functionality.
•
Replace the Sensor Cell with a known good Sensor Cell.
Under-Range problems
Probable Cause: Sensor baseline drifted lower, interference gases,