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65-2670-XX-04 M2A Transmitter Operator’s Manual
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.
To skip adjusting the fresh air reading, press and release the DOWN/NO button. The display will
indicate
SPAN w/Cal Gas?
. Skip to the next section, “Adjusting the Span Setting”.
4. Screw the zero air cylinder into the
0.25 LPM
fixed flow regulator.
CAUTION: Using the 0.5 LPM regulator that is normally recommended for M2As will result in
an inaccurate calibration.
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 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 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 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
0.25 LPM
regulator by turning the knob counterclockwise.
3. Install the
0.25 LPM
regulator onto the cylinder.
CAUTION: Using the 0.5 LPM regulator that is normally recommended for M2As will result in
an inaccurate calibration.
4. Allow calibration gas to flow for the length of time determined in “Determining Response Time”
5. Turn the regulator knob clockwise to close it.
