65-2660RK-XX-04 M2A Transmitter Operator’s Manual
21
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 will indicate
Leaving CAL Mode
and the M2A 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 page 35.
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 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?
.
11. Press and release the DOWN/NO button. The display will indicate
Leaving CAL Mode
and the M2A will
return to normal operation.
Calib?
YES/NO
