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Chapter 3: Installation & Startup
65-2660XL-XX-04 M2A-XL Transmitter
WARNING: The M2A-XL is not an active gas monitoring device during the fresh air
adjustment procedure. The 4-20 mA output signal will “freeze” at 3.5 mA and all
relays will remain in their non-alarm state while the M2A-XL is in Calibration
Mode. The output signal will not indicate current readings and the relays will not
resume operating normally until the M2A-XL is in normal operation again.
NOTE:
While in the calibration program, if there is no switch activity for the calibration time-
out period the unit will return to normal operation. The factory set time-out is 15
minutes. If you want a different time-out period, see “Viewing & Changing M2A-XL
Parameters” on page 28 for instructions to change the calibration time-out.
1. While in normal operation, press and hold the UP/YES button for 5 seconds to enter
Calibration Mode. Release the button when the following screen appears
.
2. If you want to continue with calibration, press and release the UP/YES button. The display
will indicate the target gas and
CAL Mode
for a few seconds before showing
FreshAir
Adjust?
.
If you want to exit Calibration Mode, press and release the DOWN/NO button. The M2A-
XL will indicate
Leaving CAL Mode
and the M2A-XL will return to normal operation.
3. To continue with adjusting the fresh air reading, press and release the UP/YES button.
ENTER
will alternate with
FreshAir
on the top display line and the current gas reading will
be on the bottom display line.
4. Screw the 100% N
2
cylinder into the fixed flow regulator.
5. Use the flexible tubing coming from the calibration adapter/splash guard to connect the
regulator to the calibration adapter.
6. Turn the regulator knob counterclockwise to open the regulator.
7. Allow gas to flow for the length of time determined in “Determining Response Time” on
8. Turn the regulator knob clockwise to close the regulator.
9. Unscrew the cylinder from the fixed flow regulator. Leave the calibration adapter/splash
guard’s flexible tubing connected to the regulator. The M2A-XL will continue to display the
minimum gas response on the display and retain the response level in its memory.
10. Press and release the ENTER button. The M2A-XL will perform a fresh air adjustment and
the display will indicate
SPAN w/Cal Gas?
.
11. Press and release the DOWN/NO button. The display will indicate
Leaving CAL Mode
and
the M2A-XL will return to normal operation.
Calib?
YES/NO
