Vaisala HM70 - Manual (Page 52)

User's Guide ______________________________________________________________________
50 __________________________________________________________________ M210297EN-E
Field Checking and Adjustment by
Using a Calibrated Reference Probe
Follow the steps from 1 to 8 and continue as follows:
9. Check that the probes are located in equal conditions and wait until
the readings are stabilized (can take 30 minutes or more). If you
are near the probes, do not breathe in their direction.
10. Press ADJUST to continue adjusting .
11. Press To same asRH
Ii/I
., press SELECT. (MI70 recognizes always the
port to which the HMP70-series probe is connected).
12. Confirm by pressing YES.
13. Adjustment is done. Press BACK and EXIT to return to the
basic display.
14. Replace the CAL.DIS jumper.
15. Switch off the MI70 and detach the calibration cable from MI70
and from the transmitter.
1-Point Adjustment by Using a
Calibrator
When adjusting a transmitter only in one reference condition, please
take care that the reference condition represents well the measuring
environment.
If you use humidity calibrator HMK15, please use the adapter fitting
(13.5 mm) on the measurement hole if you calibrate probes of
HMT324, HMT325, HMT327 and HMT328.
Follow the steps from 1 to 8 and continue as follows:
9. Remove the filter from the transmitter's probe and insert the
probe into the reference condition.
10. Press ADJUST to continue adjusting .
11. Select 1-point adjustment , press SELECT.
12. Press READY when the reading is stabilized in the reference
condition (takes about 30 minutes or more) . You can follow the
stabilization from the GRAPH display.