M2A Transmitter Operator’s Manual 47
NOTE: Consult factory for availability of detectors for toxic M2A types not listed in Table 1 on page 7.
4. When the desired target gas is on the display, press and release the ENTER button. The display will ask
SAVE IT? YES/NO.
5. To discard the gas type change, press and release the DOWN/NO button. The display will ask DO OVER?
YES/NO. Press the DOWN/NO button. The display will ask ABORT? YES/NO. Press the UP/YES button.
The M2A will return to normal operation without changing the gas type.
To save the gas type, press and release the UP/YES button. The display will indicate Gas Type Updated, the
display will indicate the target gas and the detection range for a few seconds, and then the M2A will enter
Configuration Mode automatically so that the parameter settings in Configuration Mode can be verified or
changed.
6. While in Configuration Mode press and release the ENTER button to accept the displayed parameter setting
and move to the next one. Use the UP/YES and DOWN/NO buttons to adjust a setting. See “Chapter 5:
Configuration Mode” on page 42 for a complete description of Configuration Mode.
7. When you have reviewed and accepted the last item in Configuration Mode by pressing the ENTER button,
display will ask SAVE IT? YES/NO.
8. To save the configuration settings, press and release the UP/YES button.The display will indicate Config
Saved and the M2A will begin its warm-up sequence.
To discard the settings and review them again, press the DOWN/NO button. The display will ask DO
OVER? YES/NO. Press the UP/YES button and the display will indicate Re-do Config, then display the
target gas and the detection range for a few seconds before returning to Configuration Mode. Repeat steps 6
- 8 until the settings are as desired.
9. After the M2A completes its warm-up sequence, the display will indicate CAL NEEDED. Since the gas
type has been changed, a successful calibration must be performed before the M2A can enter normal
operation.
10. Press and release the UP/YES button to enter Calibration Mode. Normally, you must hold the UP/YES
button for 5 seconds to enter Calibration Mode, but since a calibration is required, only a momentary push is
needed to enter Calibration Mode after changing the gas type.
11. See “Calibration, Combustible Gas, CO2, and Toxic Versions” on page 50 or “Calibration, Oxygen Version”
on page 54 for calibration instructions.
NOTE: When calibrating an M2A after changing the gas type, the M2A will not ask if you want to calibrate,
or whether you want to perform a fresh air adjustment, span adjustment or zero adjustment. Since a
complete calibration is required, the calibration sequence will proceed without asking if you want to
perform certain operations.
OXYGEN 0 - 25.0% volume
Table 13: Toxic/Oxygen Gas Types
Gas Type
Choices
Detection Range
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