Vaisala HMP228 Guide de l'utilisateur télécharger pdf (Page 42)

User's Guide _______________________________________________________________________

40 ____________________________________________________________________M210498en-A

2-point adjustment by using a

calibrator

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

mm) on the measurement hole.

Follow the steps from 1 to 4 and continue as follows:

5. Select the quantity press SELECT.

6. Remove the filter from the transmitter's probe and insert the probe

head into the first reference condition.

7. Press ADJUST to continue adjusting.

8. Select 2-point adjustment, press SELECT.

9. Press READY when the reading is stabilized in the first reference

condition (takes about 30 minutes or more).

10. Enter correct reference value by using the arrow buttons. Press

OK.

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

reference condition. You can follow the stabilization from the

GRAPH display (takes about 30 minutes or more).

12. Press READY when the reading is stabilized in the second reference

condition.

13. Give the higher reference humidity value by using the arrow buttons.

Press OK.

14. Confirm the adjustment, press YES (by pressing NO you return

to adjustment mode display and no changes are made). If the

difference between two references is less than 50 %, adjustment can

not be done.

15. Adjustment is done. Press

BACK to exit the adjustment mode press

EXIT to return to the basic display.

16. Detach the calibration cable.

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Vaisala HMP228 Guide de l'utilisateur Page 42