Vaisala HMT310 - Manual (Page 83)

Chapter 6 ___________________________________________________ Calibration and Adjustment
VAISALA ________________________________________________________________________ 83
Press EXIT to quit the adjustment mode and return to the basic MI70
view.
LiCl – NaCl automatic adjustment
LiCl-NaCl automatic adjustment is a two-point adjustment in reference
humidities of 11.3 % (LiCl) and 75 % (NaCl). You do not have to enter
the reference values, the MI70 displays the accurate value based on the
measured temperature and the Greenspan table stored into the memory of
the MI70.
To make the adjustment, select LiCl – NaCl auto in the RH adjustment
menu and follow the steps below:
1. Set the probe to the LiCl reference humidity. You can follow the
stabilization from the
GRAPH display. Press READY when the
reading is stabilized.
2. Set the probe to the NaCl reference humidity. You can follow the
stabilization from the
GRAPH display. Press READY when the
reading is stabilized.
3. After the NaCl reference humidity measurement is done, MI70
checks if you want to use this 2-point adjustment. Press
OK to
confirm the adjustment.
Once confirmed, the adjustment has been carried out. Press BACK to
exit the RH adjustment mode and return to the main adjustment options.
Press EXIT to quit the adjustment mode and return to the basic MI70
view.
Adjusting T with MI70
Selecting T in the main adjustment menu brings up the current T
measurement. Select ADJUST to choose the adjustment type. The
following T adjustment options are available:
- 1-point adjustment
- 2-point adjustment
NOTE Temperature adjustment in one or two points can be done if there is
reason to believe that the adjustment is changed. If the adjustment is
done only in one point, the reference condition is used to represent the
measuring environment.