RKI Instruments M2A - Manual (Page 38)

33 M2A Transmitter Operator’s Manual
4. When you have scrolled through all the adjustable parameters, SAVE IT? YES/NO appears on
the display.
5. If you do not wish to save the adjustments and want to exit Configuration Mode, press and
release the DOWN/NO button. The DO OVER? YES/NO message will display. Press and
release the DOWN/NO button. The ABORT? YES/NO message will display. Press the UP/
YES button to return to normal operation.
If you wish to change some of the adjustments made, press and release the DOWN/NO button.
The DO OVER? YES/NO message will display. Press and release the UP/YES button. The
Re-do Config message will display and the M2A will return to the first adjustable parameter.
Go back to step 3 and continue.
If you wish to save the adjustments made, press and release the UP/YES button. Config Saved
is indicated on the display for a few seconds and the M2A returns to normal operation.
ZeroSupp
(0.0% of the detection range in terms of
the detection units for carbon dioxide
channel types, 0.5% oxygen for oxygen
types, 2% of the detection range in terms
of the detection units for all other types) The zero suppression feature helps prevent “jumpy” readings near the fresh air
reading.
For example, if the zero suppression setting for a combustible LEL detector is
2.0% LEL, the M2A will display a reading of 0% LEL for gas readings from -
2% LEL to 2% LEL. It is settable from 0 to 6% of the detection range.
FILTER
(5 secs) The filter feature helps “smooth out” jumpy or noisy signals from the detector.
You can set the filter from 0 seconds to 60 seconds in 5 seconds increments.
The displayed gas reading is the average reading over the previous time period
defined by the filter setting. So if the filter is set to 5 seconds, the displayed gas
reading is the average over the past 5 seconds.
CAL Time
(15 mins) The calibration time-out sets the amount of time after the last button push while
in Calibration Mode that the M2A will wait before returning to normal opera-
tion. If the calibration time-out is set to 15 mins, then M2A will return to normal
operation automatically 15 minutes after the last button push.
Auto Zero
(Disabled for carbon dioxide channels;
Enabled for all other channel types) If set to Enabled, the M2A’s firmware will monitor the zero (fresh air) reading
and make automatic zero adjustments under precisely specified conditions if it
determines that a reading change is due to normal sensor drift.
If set to Disabled, the Auto Zero function is turned off.
Table 6: Configuration Parameters (Continued)
Parameter
(Factory Set Value)
Description