16 • 65-2331-04 H
2
S Transmitter
Replacing Components of the H
2
S Transmitter
This section includes a procedure to replace the H
2
S plug-in sensor, the H
2
S detector
assembly, and the amplifier. In most cases, it is not necessary to replace the entire detector
assembly.
Replacing the Plug-In H
2
S Sensor
CAUTION:
The sensor contains electrolyte which is a dilute acid. Do not disassemble the sensor
when replacing it with a new one. If sensor electrolyte comes in contact with your
skin, wash affected area thoroughly with soap and water.
1.
Turn off the controller.
2.
Turn off or unplug power to the controller.
3.
Unscrew the detector housing cap from the detector housing body. Make sure not to
lose the cap gasket.
4.
Unplug and remove the H
2
S sensor with the rubber boot and spacer attached.
5.
Remove the rubber boot and spacer from the old sensor.
6.
Install the spacer and rubber boot onto the replacement sensor’s face.
7.
Carefully plug the replacement sensor into the four-socket pattern that is located in
the detector housing.
8.
Make sure the cap gasket is in place and screw the detector housing cap back onto the
detector housing body.
9.
Turn on or plug in power to the controller.
10. Turn on the controller and place into normal operation.
CAUTION:
Allow the replacement sensor to warm up for 5 minutes before you continue with the
next step.
11. Calibrate the transmitter as described in the “Calibration” on page 19.
Replacing the H
2
S Detector
NOTE:
In most cases, it is only necessary to replace the plug-in H
2
S sensor.
1.
Turn off the controller.
2.
Turn off or unplug power to the controller.
3.
Unscrew the calibration adapter/splash guard from the detector.
4.
Remove the detector junction box’s cover from the junction box.
5.
Remove the detector terminal strip from its socket.
6.
Disconnect the detector leads from the detector terminal strip. Note the position of the
color-coded leads as you remove them.
7.
Unscrew the detector from the detector junction box conduit hub.
8.
Guide the detector leads of the replacement detector through the bottom conduit hub
of the detector junction box, then screw the mounting threads of the detector into the
conduit hub. If necessary for environmental conditions, apply thread sealant or Teflon
