Calibration Procedure; Figure 21 Assembling The Opaque Glass Plates - Vaisala PWD22 User Manual

Chapter 6_______________________________________________________________ Maintenance
VAISALA ________________________________________________________________________ 93
Figure 21 Assembling the Opaque Glass Plates
5. Fasten the opaque glass plates to the hoods. Pay attention to the
signal value printed on the plates because it is needed during the
following steps.
6. Move away from the optical path and wait for 30 seconds.
7. Give the CHEC command.
8. After one minute, read the displayed signal.
9. The signal value must be close to the one printed on the plates.
If the difference is less than 5 %, calibration is correct. If not,
continue with the calibration procedure.
10. Terminate the CHEC command by pressing the ESC key.

Calibration Procedure

If calibrating is needed according to the calibration check, follow the
instructions below (see section Calibration Check Procedure on page
92).
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