Vaisala HMP228 Guide de l'utilisateur télécharger pdf (Page 45)

Chapter 5 ___________________________________________ CALIBRATION AND ADJUSTMENT

0605-091

Figure 19 Adjustment Mode

Relative Humidity Adjustment by

Using a Calibrated Reference Probe

When using this adjustment method, start with the steps 1 through 12

on the previous page. Then proceed as follows:

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

2. 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.

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

reference probe by pressing the ADJUST key.

4. Select To same as RH

I/II

. Press the SELECT key.

5. Confirm by pressing the YES key.

6. To return to the basic display, first press the BACK key, then

the EXIT key twice.

1-point Relative 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. When using this adjustment method, start

with the steps 1 through 12 on the previous page. Then proceed as

follows:

1. Insert the transmitter probe to the reference humidity.

2. Press the ADJUST key.

3. Select 1-point adjustment. Press the SELECT key.

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Vaisala HMP228 Guide de l'utilisateur Page 45