Temperature Field Check And Adjustment Using A Calibrated Reference Probe; Adjustment With Hmi41 - Vaisala HMT120 User Manual

HMT120 User Guide
4. Press READY when the reading has stabilized in the LiCl salt chamber (can take 30
minutes or more). You can follow the stabilization from the GRAPH display.
5. Remove the probe from the LiCl salt chamber and insert the probe head into the NaCl salt
chamber.
6. Press READY when the reading has stabilized in the NaCl salt chamber (can take 30
minutes or more). You can follow the stabilization from the GRAPH display.
7. Confirm the adjustment by pressing YES (by pressing NO you return to adjustment mode
display and no changes are made).
8. The adjustment is done. Press BACK and EXIT to return to the basic display.
9. Turn off the MI70 and detach the connection cable.
6.3.5 Temperature Field Check and Adjustment Using a
Calibrated Reference Probe
Complete the steps listed in
(page 56)
1. Check that the probes are located in equal conditions and wait until the readings have
stabilized (can take 30 minutes or more). If you are close to the probes, do not breathe in
their direction.
2. Press ADJUST to continue adjusting.
3. Choose To same as THI/II from the MI70 adjustment menu and press SELECT. MI70
automatically recognizes which port the HMP70 series probe is connected to.
4. Press YES to confirm the adjustment.
If the temperature difference between the reference probe and the
transmitter is too large, the adjustment cannot be done (MI70 notifies you of
this). The available reserve for T adjustment of the transmitter depends on
the initial temperature calibration of the unit.
5. The adjustment is done. Press BACK and EXIT to return to the basic display.
6. Turn off the MI70 and detach the connection cable.
6.4 Adjustment with HMI41
You can check and adjust the transmitter's relative humidity measurement with the HMI41
indicator and HMP41/45/46 probes (requires the HMI41 connection cable (Vaisala order code:
25917ZZ)).
60
Adjusting RH and T with MI70 Hand-Held Indicator
before continuing with this adjustment option.
M211244EN-C