RKI Instruments M2 for 12 VDC - Manual (Page 26)

21 M2 Transmitter Operator’s Manual, 12 V DC Operation
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 M2 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 M2 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 17 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, the 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 M2 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 M2 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 M2 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” on page 25 for calibration instructions.
NOTE: When calibrating an M2 after changing the gas type, the M2 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.