RKI Instruments M2A - Manual (Page 41)

M2A Transmitter Operator’s Manual 36
NOTE: Consult factory for availability of detectors for toxic M2A types not listed in “M2A
Specifications” on page 2.
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 31 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 42 or “Calibration,
Oxygen Version” on page 45 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.