40
•
Chapter 7: Maintenance
65-2658XL-CH4-4 M2A-XL Transmitter Operator’s Manual
4. Screw the zero air 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 zero air 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 zero air 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?
.
NOTE:
If the fresh air adjustment fails, see “Troubleshooting” on page 35 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. Screw the calibration gas cylinder into the fixed flow regulator.
3. Turn the regulator knob counterclockwise to open the regulator.
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% volume and 100%
volume).
