36
65-2643RK0504SS M2A Transmitter Operator’s Manual
air adjustment, the M2A will freeze the display reading at the highest response and the M2A will continue to
display this reading and retain it in its memory until the fresh air adjustment procedure is completed. When
calibration gas is applied to the M2A during a zero adjustment, the M2A will freeze the display reading at the
lowest response to the calibration gas. The calibration gas can then be removed and the M2A will continue to
display this reading and retain it in its memory until the zero adjustment procedure is completed.
Adjusting the Fresh Air Reading
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 to continue. The display will
indicate
OXYGEN 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 will indicate
Leaving CAL Mode
and the M2A will return to normal operation.
3. To continue with adjusting the fresh air (span) reading, press and release the UP/YES button.
ENTER
will
alternate with
FreshAir
on the top display line and the current oxygen 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
ZERO w/Cal Gas?
. Skip to the next section, “Adjusting the Zero Setting”.
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 page 34.
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 maximum 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
ZERO w/Cal Gas?
.
NOTE:
If the fresh air adjustment fails, see “Troubleshooting” on page 32 for recommended actions.
Adjusting the Zero Setting
1. If you want to continue with adjusting the zero setting, press and release the UP/YES button.
APPLY
will
alternate with
ZERO 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 zero reading, press and release the DOWN/NO button. The display will
indicate
Leaving Cal Mode
and the M2A will return to normal operation.
2. Screw the 100% nitrogen 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 Time” on
Calib?
YES/NO
