Chapter 6 ______________________________________________________________ Maintenance
VAISALA _______________________________________________________________________ 87
0308-006
Figure 19 Assembling the Opaque Glass Plates
Calibration Procedure
If calibrating is needed according to the calibration check (see section
Calibration Check on page 86), calibrate the unit:
1. Give the following command:
CAL calibrator signal value
For example: CAL 485
The calibrator signal value is printed on the labels of the glass
plates. Typically the signal is close to 500 Hz. PWD22/52
calculates a new scaling factor and stores it in the non-volatile
memory (EEPROM).
2. Type CHEC to verify that the new scaling factor is in use.
The displayed signal value should be equal to the calibrator signal
value.
If the difference between the new scaling factor and the factory
calibrated scaling factor is more than 20 %, the CAL command is
ignored. Check PWD22/52 and the calibrator for hardware or
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