Emerson Net Safety ST3, Reference Manual

Page: 25 / 32

3. Remove the bottom part of the sensor enclosure by turning it in a counter clockwise
rotation to expose the sensor module.
4. Carefully remove the sensor module from the sensor housing by pulling the module
straight out of the housing.
CAUTION
Do not twist the sensor module.
5. Properly dispose of the old sensor module as per local guidelines and regulations.
6. Remove the replacement sensor module from its packaging, taking care not to
touch any electronic components.
7. Rotate replacement sensor module until it aligns with the guide posts. Once
aligned, press firmly into place.
8. Install and hand-tighten the bottom part of the sensor enclosure by turning it in a
clockwise direction.
9. Install the locking ring by tightening the set screws with 1.5 mm Allen Key tool.
10. Restore power to sensor via the transmitter.
11. Verify that the display shows ppm and not xxx as shown in
Figure 3-1 .
If the display is showing xxx, then the sensor module is not seated properly. In this
case, repeat all steps within this procedure.
4.4 Troubleshooting
Emerson did not design these sensors and transmitters to be repaired in the field. If
problems should develop, first check for faulty wiring, confirm proper voltage to the
sensor, and try to calibrate.
If problems persist, please contact Net Safety’s technical support department first by
phone to try and resolve any issues. If issues cannot be resolved, please follow the
procedure in
Return of material .
4.5 Storage
Store the sensor and its electronic parts in locations free from dust, liquid spills,
contaminants, and moisture.
Ensure the storage temperature is well within within the limits of the certified
temperatures of the equipment. See
Specifications for certified temperatures.
4.6 Spare parts and accessories
Description Part number
Calibration cup/splash guard CCS-1
Calibration kit CAL-KIT-1
Reference Manual Maintenance
00809-0100-4303 November 2020
Net Safety ST3 25