Vaisala HMT310 - Manual (Page 81)

Chapter 6 ___________________________________________________ Calibration and Adjustment
VAISALA ________________________________________________________________________ 81
Adjustment Using an MI70 Indicator
You can use the MI70 handheld indicator to adjust the following in
HMT310:
- Temperature (T)
- Relative humidity (RH)
- Pressure compensation value for humidity measurement (environment
settings)
Note that starting the calibration in MI70 requires pressing the
adjustment button on the HMT310 board. See Figure 18 on page 74 for
the location of the adjustment button. To return to normal operation
mode, use the RESET command (see section Reset Transmitter on page
53).
NOTE When adjusting both relative humidity and temperature, make the
temperature adjustment first.
Starting MI70 Adjustment
1. Connect the HMT310 series transmitter to the MI70 handheld
indicator using the connection cable (optional accessory, Vaisala
order code DRW216050SP).
2. Turn on the MI70.
3. Press the HMT310 adjustment button (see Figure 18 on page 74) to
start the adjustment mode. A notification about starting the
adjustment mode is displayed on the MI70 screen.
4. Press OK to enter the adjustment menu. The available adjustment
options are displayed (RH or T). You can also view the date of last
adjustment.
Use the arrow buttons to highlight RH or T and press SELECT to choose
the parameter for adjustment.
For RH adjustment instructions, see section Adjusting RH with MI70.
For T adjustment instructions, see section Adjusting T with MI70.