Vaisala HM70 - Manual (Page 50)

User's Guide ______________________________________________________________________
48 __________________________________________________________________ M210297EN-E
14. Press ADJUST
15. Select 1-point adjustment . press SELECT
16. Wait until the reading is stabilized (takes about 30 minutes).
You can follow the stabilization from the GRAPH display.
17. Press READY when the value is stabilized in the reference
humidity.
18. Enter the correct humidity value by using the arrow buttons.
Press OK .
19. Confirm by pressing YES
20. Press BACK, EXIT, EXIT to return to the basic display.
2-Point Adjustment by Using a
Calibrator
You can use Vaisala humidity calibrator HMK15 in calibration and
adjustment. Note that the difference between the two reference
humidities shall be at least 50 %. 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 first reference humidity.
14. Press ADJUST
15. Select 2-point adjustment . press SELECT
16. Wait until the reading is stabilized (takes about 30 minutes).
You can follow the stabilization from the GRAPH display.
17. Press READY when the value is stabilized in the first reference
humidity.
18. Enter the first reference humidity value by using the arrow
buttons. Press OK .
19. Insert the transmitter probe to the second reference humidity.
20. Wait until the reading is stabilized (takes about 30 minutes or
more). You can follow the stabilization from the GRAPH
display.
21. Press READY when the value is stabilized in the second
reference humidity.
22. Enter the second reference humidity value by using the arrow
buttons. Press OK .