RKI Instruments M2 Rig Monitor - Manual (Page 37)

M2 Rig Monitor Operator’s Manual 32
6. Turn the Audio Select switch so that the selection arrow is pointing to the desired
number.
7. Place the cover over the base and push in and down in order to reinstall the cover.
Make sure that the cover is sealed to the base by the gasket.
8. Screw the captive screw at the bottom front of the strobe/horn back in.
Replacing Components of the M2
Rig Monitor
Replacing the H
2
S Plug-in Sensor
1. Disconnect the battery clamps from the + and - terminals of the 12 VDC battery.
2. Unscrew the calibration cup/splash guard from the detector housing cap.
3. Unscrew the detector cap from the housing body. Make sure not to lose the cap gasket.
See Figure 3 for an illustration of the H
2
S detector.
4. Unplug and remove the 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 match the replacement sensor’s male pins with the 4-socket pattern in the
top section and plug it in.
8. Make sure the cap gasket is in place and screw the detector cap back onto the housing
body.
9. Screw the calibration cup/splash guard back onto the detector housing cap.
10. Connect the battery clamps to the + and - terminals of the 12 VDC battery.
CAUTION: Allow the replacement sensor to warm up for 15 minutes before you continue with
the next step.
11. Calibrate the detector as described in “Calibration” on page 28.
Replacing the Gas Detector
NOTE: In most cases, it is only necessary to replace the H
2
S sensor.
1. Disconnect the battery clamps from the + and - terminals of the 12 VDC battery.
2. Remove the H
2
S detector junction box cover.
3. Disconnect the detector leads from the terminal block in the junction box. Note the
position of the color-coded leads as you remove them.
4. Unscrew the calibration cup/splash guard from the detector housing cap.
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 Figure 8 to verify the connections are correct.
8. Screw the calibration cup/splash guard onto the new detector’s housing cap.