RKI Instruments M2A - Manual (Page 39)

M2A Transmitter Operator’s Manual 34
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. The combustible gas/CO
2
and toxic/oxygen M2As
have a different terminal PCB and run on different firmware. Your M2A 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 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 7 and
Table 8 below list the choices of target gas for the M2A.
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
CO2 0 - 5,000 ppm
Select
GasType?