Vaisala HMT310 - Manual (Page 72)

USER'S GUIDE____________________________________________________________________
72 __________________________________________________________________ M210619EN-D
Temperature Calibration and Adjustment (in
One Point)
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 on page
70).
2. Remove the probe filter (see instructions on page 63) and insert the
probe into the reference temperature.
3. Let the sensor stabilize.
4. Issue command CT and press Enter.
5. Type C and press Enter a few times to check if the reading is
stabilized.
6. When the reading is stabilized, type the reference temperature after
the question mark and press Enter three times.
>ct
T : 16.06 Ref1 ? c
T : 16.06 Ref1 ? c
T : 16.06 Ref1 ? c
T : 16.06 Ref1 ? c
T : 16.06 Ref1 ? c
T : 16.06 Ref1 ? 16.0
Press any key when ready ...
T : 16.06 Ref2 ?
OK
>
OK indicates that the calibration has succeeded.
7. Take the probe out of the reference conditions and replace the
filter. When using the stainless steel filter, take care to tighten the
filter properly (recommended force 130 Ncm).
8. If needed, record the calibration information (text and date) to the
memory of the transmitter, see CTEXT Set Calibration Information
Text on page 68 and CDATE Set Calibration Date on page 68.
9. Reset the transmitter by issuing the RESET command. The
transmitter returns to normal mode.