M2A-XL Transmitter Operator’s Manual
Chapter 6: Gas Type Mode
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Chapter 6: Gas Type Mode
Overview
This chapter describes how to use Gas Type Mode to select the M2A-XL’s gas type. The gas type
determines the target gas and detection range. The combustible gas/CO
2
and toxic/oxygen M2As
have a different terminal PCB and run on different firmware. Your M2A-XL will only have gas
type choices available that it can support.
Gas Type Mode includes a 5-minute time-out feature. If you do not press a button for 5 minutes,
the M2A-XL automatically returns to normal operation.
NOTE:
If the M2A-XL 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-XL 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 12
and Table 13 below list the choices of target gas for the M2A-XL.
Table 12: Combustible Gas/CO
2
Gas Types
Gas Type
Choices
Detection Range
HC
0 - 100% LEL
iBUTANE
0 - 100% LEL
PROPANE
0 - 100% LEL
HEXANE
0 - 100% LEL
HYDROGEN
0 - 100% LEL
METHANE
0 - 100% Volume
METHANE
0 - 100% LEL
Select
GasType?
