65-2662XL-04 M2A-XL Transmitter
Chapter 7: Maintenance
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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?
.
NOTE:
If the fresh air adjustment fails, see “Troubleshooting” on page 37 for
recommended actions.
Adjusting the Span Setting
1. If you want to continue with adjusting the span setting, press and release the UP/YES button.
APPLY
will alternate with
SPAN Gas
on the top display line and the current gas reading will
be on the bottom display line.
If you want to skip adjusting the span reading, press and release the DOWN/NO button.
The display will indicate
Leaving Cal Mode
and the M2A-XL will return to normal
operation.
2. It is important to vent the regulator while installing it onto the cylinder. Venting the regulator
during installation helps prevent air from getting into the cylinder and degrading the gas.
Open the regulator by turning the knob counterclockwise.
3. Install the regulator onto the cylinder.
4. Allow calibration gas to flow for the length of time determined in “Determining Response
5. Turn the regulator knob clockwise to close it.
6. Unscrew the calibration gas cylinder from the fixed flow regulator. The M2A-XL will
continue to display the maximum gas response on the display and retain the response level in
its memory.
7. Adjust the gas reading up or down to match the calibration gas cylinder concentration
by using the UP/YES and DOWN/NO buttons, then press and release the ENTER
button.
NOTE:
The detector must be calibrated with a gas concentration between 10% and
100% of the channel’s full scale value (ie. between 10 ppm and 100 ppm
H
2
S).
8. The M2A-XL will perform a span operation. The display will indicate
SPAN Gas PASS
for a
few seconds, then indicate
SPAN Gas SAVED
before indicating
Leaving CAL Mode
for a
few seconds.
NOTE:
If the span adjustment fails, see “Troubleshooting” on page 37 for
recommended actions.