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65-2670-XX-04 M2A Transmitter Operator’s Manual
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” on page 38 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.
