RKI Instruments 65-2427RK-05 User Manual
Page 14
10 • 65-2427RK-05 H
2
S Detector
Replacing Components of the H
2
S Detector
This section includes a procedure to replace the H
2
S sensor and the entire detector
assembly. 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 replacement sensor as described in the Calibration section of this
manual.
Replacing the H
2
S Detector
NOTE:
In most cases, it is only necessary to replace the H
2
S sensor.
1.
Turn off the controller.
2.
Turn off or unplug power to the controller.
3.
Remove the junction box cover.
4.
Disconnect the detector leads from the terminal block in the junction box. Note the
position of the color-coded leads as you remove them.
5.
Unscrew the detector from the junction box hub.
6.
Guide the detector leads of the replacement detector through the junction box hub
then screw the mounting threads of the detector into the hub.
7.
Connect the detector leads to the terminal block the same way the old detector was
wired. See the controller operator’s manual and the controller’s detector head
specification sheet to verify the connections are correct.