Vaisala Humicap HMW60U Guia do Utilizador descarregar pdf (Página 49)

Chapter 9 ______________________________________ Calibration and Adjustment of Transmitters

VAISALA _______________________________________________________________________ 47

The first row shows the reading of the probe/transmitter

connected to the port I, the second row shows the reading of the

probe/transmitter connected to the port II. The third row RH/T is

the difference between the readings of the ports. By pressing

BACK you return to the selection display.

Figure 8 Example of the RH display

Field Checking and Adjustment of

Humidity by Using a Calibrated

Reference Probe

Follow the steps from 1 to 12 and continue as follows:

13. Ensure that the probes are located in the same conditions.

14. Wait until the readings have stabilized. If the difference between

the humidity readings is less than 2 % RH, there is no immediate

need for adjustment.

15. Adjust the transmitter reading to correspond a reading of the

reference probe by pressing ADJUST.

16. Select

To same as RH

I/II

. Press SELECT.

17. Confirm by pressing YES

18. Press BACK, EXIT, EXIT to return to the basic display.

1-Point Humidity Adjustment by

Using a Calibrator

You can use Vaisala humidity calibrator HMK15 to achieve the

reference humidities. MI70 indicator is working as a communicator in

the calibration procedure.

Follow the steps from 1 to 12 and continue as follows:

13. Insert the transmitter probe to the reference humidity

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Vaisala Humicap HMW60U Guia do Utilizador Página 49