User guide

25 65-2649RK-CH4-4 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 65-2649RK-CH4-4 M2A is factory setup for methane (CH
4
). Do not change
the Gas Type setting.
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
HC 0 - 100% LEL
iBUTANE 0 - 100% LEL
PROPANE 0 - 100% LEL
HEXANE 0 - 100% LEL
HYDROGEN 0 - 100% LEL
METHANE 0 - 100% Volume
Select
GasType?