Vaisala HMT330 - Manual (Page 160)

User's Guide _______________________________________________________________________
158 __________________________________________________________________ M210566EN-K
Using Display/Keypad
Note that the difference between the two humidity references must be at
least 50 %RH.
1. Carry out the chemical purge (if available).
2. Press the ADJ button (opens the ADJUSTMENT MENU).
3. Select Adjust RH measurement,
press ► button.
4. Select 1-point/ 2-point adjustment, press START.
5. Select the reference as guided by the display, press SELECT.
0706-005
Figure 79 Selecting Point 1 Reference Type
6. Remove the filter from the probe and insert the probe into a
measurement hole of the dry end reference chamber (for example,
LiCl: 11 %RH in the humidity calibrator HMK15.) Use the adapter
fitting for the probes of HMT334, HMT335, HMT337 and
HMT338.
7. Wait at least 30 minutes for the sensor to stabilize. Follow the
stabilization from the GRAPH display.
8. Press READY when stabilized. If you have chosen the Other
reference value, enter now the reference value by using the arrow
buttons.
When carrying out the 2-point adjustment proceed to the next
adjustment point and carry out the procedure as described in the
previous steps.
9. Press YES to confirm the adjustment. Press OK to return to the
adjustment menu.
10. Press EXIT to close the adjustment mode and return to the basic
display. Before closing the adjustment mode, feed the adjustment
information into the device, see section Feeding Adjustment
Information on page 168.