RKI Instruments M2 Series - Manual (Page 37)

M2 Transmitter Operator’s Manual 32
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 M2 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 M2 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 M2 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 M2 will wait before returning to normal
operation. If the calibration time-out is set to 15 mins, then M2 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 M2’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