65-2670XL-XX-07 M2A-XL Transmitter
Chapter 3: Installation & Startup
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5. The OLED display will indicate the firmware version when the M2A-XL is first powered up
and will then count down a one minute warm-up period before normal operation begins.
During normal operation, the display will indicate the target gas and current gas reading.
Verify that the display is indicating the target gas and current gas reading after the warm-up
period is complete and normal operation begins.
NOTE:
For all gases except ClO
2
, allow the M2A-XL’s detector to warm up for 15
minutes before you continue with the next section, “Adjusting the Fresh Air
Reading.”
For ClO
2
, all the M2A-XL’s detector to warm up for 2-3 hours before you
continue with the next section, “Adjusting the Fresh Air Reading.”
Adjusting the Fresh Air Reading
When the M2A-XL is shipped from RKI Instruments, Inc., it is factory calibrated. If a full
calibration is desired at startup, see “Calibration” on page 41.
Verify that the M2A-XL is in a fresh air environment (environment known to be free of
combustible or toxic gas vapors and of normal oxygen content, 20.9%).
CAUTION:
If you suspect the presence of the target gas in the monitoring environment, use the
calibration kit and the zero air calibration cylinder to introduce “fresh air” to the
detector and verify an accurate fresh air setting. See the “Calibration” on page 41
for instructions on how to use a zero air cylinder when performing a fresh air
adjustment.
Non-Intrusive Fresh Air Signal Adjustment
If the M2A-XL is installed in a classified area and non-intrusive zero adjustment is required,
follow the instructions below,
but do not remove the junction box cover
. Use the magnetic
wand accessory to actuate the magnetic switches instead of pushing the control switch buttons. To
actuate a magnetic switch and perform the same operation as pressing a control switch button,
touch the magnet in the end of the magnetic wand to the M2A-XL’s glass cover directly over the
magnetic switch you wish to actuate. Touching the glass and removing the wand is the same as
pressing and releasing a button. Touching the glass and keeping the wand in place is the same as
pressing and holding a button.
NH3
0 ppm
