M2A-XL Transmitter Operator’s Manual
Chapter 7: Maintenance
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Replacing an ESM-01 Plug-in Sensor
1. Turn off or disconnect power to the M2A-XL.
2. Unscrew the detector cap from the detector housing body. Take care not to lose the cap gasket.
If the splashguard begins to unscrew from the detector cap, make sure to remove the detector
cap also. See Figure 7 for an illustration of the ESM-01 detector.
3. Unplug and remove the sensor.
4. Remove the black plug from the top of the replacement sensor.
5. Carefully match the replacement sensor’s plug with the socket in the housing body and plug it
in.
WARNING: The ESM-01 detectors cannot be changed from one type to another. Replace
the plug-in sensor only with the same type of ESM-01 sensor.
6. Make sure the cap gasket is in place and screw the detector cap back onto the housing body. If
the splash guard was unscrewed from the detector cap, screw it back onto the detector cap.
7. Turn on or reconnect power to the M2A-XL.
NOTE:
Allow the replacement sensor to warm up for 15 minutes
before you
continue with the next step.
8. Calibrate the detector as described in “Calibration, Combustible Gas, CO2, and Toxic
Replacing the Hydrophobic Membrane (Non-XP CO,
H
2
S, and O
2
Detectors)
1. Turn off or disconnect power to the M2A-XL.
2. Unscrew the detector housing cap from the detector housing body.
3. Gently pry up the edge of the white hydrophobic membrane with a small flat blade
screwdriver or a similar tool.
4. Peel off the hydrophobic membrane. It may be necessary to clean off the detector housing cap
face to remove any residue left from the adhesive backed membrane.
5. Install the new membrane in the recess on the face of the detector housing cap.
6. Make sure the cap gasket is in place and screw the detector housing cap back onto the detector
housing body.
7. Turn on or reconnect power to the M2A-XL.
