Qel QIRF Installation, Operation And Maintenance Manual page 22

• For Diffusion Version: Connect the zero gas supply tubing to the fitting on the
right side of enclosure
• For Pump-through Version: Connect the zero gas supply tubing to the push-in
fitting on the bottom side of enclosure
2. Turn on the gas flow and press Key [YES] to display current reading
This screen is displaying the current reading and asking if you want to perform
Zeroing Calibration.
3. Waiting for about 3 minutes or till the reading is stable.
4. Press Key [YES] to perform Zeroing Calibration.
5. During Zeroing Calibration, the LCD will display the digital pot positions and
calibration statuses. It will take 3 to 10 minutes to perform Zeroing Calibration, then
the zero calibration data is saved and LCD displays "Accepted".
6. If the LCD displays "Cal Error" that means something is wrong in the procedure,
repeat procedure 4 to try again. If the "Cal Error" is still displayed in the end, the unit
needs to be repaired in factory, otherwise, Zeroing Calibration has succeeded, go to
next step.
7. Turn off the gas flow and remove it.
QIRF Operation Manual
85050-301-000 Rev C
QIRF Operation And Maintenance Manual
ZEROING?
NN PPM
21
May. 01, 2012