Calibration Procedure; Figure 19 Assembling The Opaque Glass Plates - Vaisala PWD22/52 User Manual

Chapter 6 ______________________________________________________________ Maintenance
VAISALA _______________________________________________________________________ 85
Figure 19 Assembling the Opaque Glass Plates

Calibration Procedure

If calibrating is needed according to the calibration check, follow the
instructions below (see section Calibration Check Procedure on page 84).
1. Give the following command:
CAL calibrator signal value
For example:
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 one is more than 20 %, the CAL command will
be ignored. Check PWD22/52 and the calibrator for hardware or
mechanical errors. Also consult Vaisala.
CAL 485
0308-006