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B.
Methane Sensor Replacement
The Bascom-Turner methane sensor is housed in a sintered metal flame arrestor and is
connected to the board by a short length of cable terminating in a 6-pin connector. A hold-down
plate, used to secure the methane sensor to the gas manifold, is captive on the cable.
The tools required for replacement of a methane sensor are a Phillips #1 screwdriver and
a small implement wide enough to reach both push button switches on the right side of the
instrument.
I.
Replacement of the Methane Sensor
The following stepwise procedure will result in an efficient and trouble-free installation:
1.
Place the selector switch to OFF and remove the two Phillips-head screws from the
back of the case (see Fig. 8).
2.
With the instrument facing up, lift the top cover off exposing the main circuit board.
Remove the two rubber plugs on the side of the case. Unscrew the cable clamp
nearest the 6 pin connector on the board, disconnect the cable from the 6 pin
connector, and remove the clamp from the cable.
Fig. 8.
30
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