RKI Instruments M2 Series - Manual (Page 38)

33 M2 Transmitter Operator’s Manual
Chapter 6: Gas Type Mode
Overview
This chapter describes how to use Gas Type Mode to select the M2’s gas type. The gas type
determines the target gas and detection range. The combustible gas/CO
2
and toxic/
oxygen M2s have a different terminal PCB and run on different firmware. Your M2 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 M2 automatically returns to normal operation.
NOTE: If the M2 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 M2 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 7 and Table 8 below list the choices of target gas for the M2.
Table 7: 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?