Vaisala HUMICAP MM70 Guide de l'utilisateur télécharger pdf (Page 47)

Chapter 5 ___________________________________________ CALIBRATION AND ADJUSTMENT

8. Adjustment is done. To return to the basic display, first press the

BACK key, then the EXIT key.

9. Detach the calibration cable.

2-point Adjustment by Using a

Calibrator

If you use humidity calibrator HMK15, use the adapter fitting (13.5

mm) on the measurement hole.

When using this adjustment method, start with the steps 1 through 4 in

the section Calibration and Adjustment of MMT318 Transmitters on

page 43. Then proceed as follows:

1. Select the quantity and press the SELECT key.

2. Remove the filter from the transmitter´s probe and insert the

probe head into the reference condition.

3. To continue adjusting, press the ADJUST key.

4. Select 2-point adjustment, press the SELECT key.

5. Press the READY key when the reading is stabilized in the

reference condition (takes about 30 minutes or more).

6. Enter correct reference value by using the arrow keys. Press the

OK key.

7. Remove the probe and insert the probe head into the second

reference condition. You can follow the stabilization from the

graph display, by pressing the GRAPH key.

8. Press the READY key when the reading is stabilized in the

second reference condition.

9. Enter the higher reference humidity value by using the arrow

keys. Press the OK key.

10. Confirm the adjustment by pressing the YES key. (By pressing

the NO key you will return to adjustment mode display and no

changes are made.) Note that if the difference between two

references is less than 50%, adjustment cannot be done.

11. Adjustment is done. To return to the basic display, first press the

BACK key, then the EXIT key.

12. Detach the calibration cable.

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Vaisala HUMICAP MM70 Guide de l'utilisateur Page 47