Vaisala HMT310 - Manual (Page 70)

USER'S GUIDE____________________________________________________________________
70 __________________________________________________________________ M210619EN-D
0507-048
Figure 17 Location of Adjustment Button
NOTE If using a warmed probe (HMT317 option) or sensor heating function,
the heating is interrupted when the adjustment button is pressed. Allow
sufficient time for the probe to reach ambient temperature and then start
the calibration procedure.
Low End Adjustment
1. Remove the transmitter unit from the mounting plate (see
Mounting the Transmitter/Removing the Transmitter Unit on page
21), and press the adjustment button once (see Figure 17 above).
2. Remove the filter from the probe (see instructions on page 63) and
insert the probe into the measurement hole of the dry end reference
chamber (for example, LiCl: 11 % RH in the humidity calibrator
HMK15, use adapter fitting 13.5 mm for HMT314, HMT315,
HMT317, and HMT318).
3. Wait at least 30 minutes for the sensor to stabilize.
4. Issue command CRH and press Enter.
5. Type C and press Enter a few times to check if the reading is
stabilized.