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65-2670-XX-04 M2A Transmitter Operator’s Manual
6. Remove the replacement sensor from its packaging and remove the wire jumper. This wire jumper
is installed on the sensor pins for shipment or storage but must be removed for the sensor to
operate properly when installed in a detector.
WARNING:
The sensor will not operate properly if the wire jumper is not removed.
7. Install the rubber boot and charcoal filter onto the new sensor’s face.
8. Carefully plug the replacement sensor into the four-socket pattern that is located in the detector
housing.
9. Make sure the cap gasket is in place and screw the detector housing cap back onto the detector
housing body.
10. Screw the calibration adapter/splash guard back onto the detector housing cap.
11. Turn on or plug in power to the M2A.
CAUTION:
For all gases except ClO
2
: Allow the replacement sensor to warm up for 15 minutes
before you continue with the next step.
For ClO
2
: Allow the replacement sensor to warm up for 2-3 hours before you continue
with the next step.
12. Calibrate the transmitter as described in the “Calibration” on page 38.
Replacing the Hydrophobic Membrane
1. Turn off or disconnect power to the M2A.
2. Unscrew the detector housing cap from the detector housing body.
3. Unplug the plug-in sensor from the four-socket pattern in the detector housing body.
4. Gently pry up the edge of the white hydrophobic membrane from the sensor face with a small flat
blade screwdriver or a similar tool.
5. Peel off the hydrophobic membrane. It may be necessary to clean off the sensor face to remove any
residue left from the adhesive backed membrane.
6. Install the new membrane on the face of the plug-in sensor.
7. Plug the sensor back into the four-socket pattern in the detector housing body.
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 reconnect power to the M2A.
Figure 10: Plug-In Sensor Jumper Removal
Remove jumper
