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65-2643RK-05-04 M2A Transmitter Operator’s Manual
Chapter 6: Gas Type Mode
Overview
This chapter describes how to use Gas Type Mode to select the M2A’s gas type. The gas type determines the
target gas and detection range.
CAUTION:
The target gas is factory set and does not normally need to be changed. The standard setting for
the 65-2643RK-05-04 is oxygen.
Gas Type Mode includes a 5-minute time-out feature. If you do not press a button for 5 minutes, the M2A
automatically returns to normal operation.
NOTE:
If the M2A enters normal operation because of a program time-out, it enters a warm-up period just as
it does when it is first turned on.
Selecting the Gas Type
1. While in normal operation or during the warm-up sequence, press and hold the UP/YES and DOWN/NO
buttons for five seconds. Release them when the following screen appears.
2. If you want to exit Gas Type Mode, press and release the DOWN/NO button. The display will indicate
NO
CHANGE
and the M2A will return to normal operation.
If you want to continue in Gas Type Mode, press and release the UP/YES button. The top display line will
indicate
GasType?
and the bottom display line will indicate the target gas choice.
3. Use the UP/YES or DOWN/NO button to scroll through the choices of target gas. Table 6 below lists the
choices of target gas for the M2A.
Table 6: Gas Types
Gas Type
Choices
Detection Range
H2S
0 - 100 ppm
CO
0 - 300 ppm
CO
0 - 200 ppm
CO
0 - 100 ppm
CL2
0 - 3.00 ppm
CL2
0 - 10.0 ppm
NH3
0 - 75.0 ppm
SO2
0 - 6.00 ppm
Select
GasType?
