Vaisala HMD60 Series - Calibration and Adjustment with M170 Hand-Held Indicator; 1-Point Adjustment Using Reference Environment

7.4 Calibration and Adjustment with MI70 Hand-
Held Indicator
You can use the MI70 hand-held indicator to make a 1-point adjustment to temperature (T) or
relative humidity (RH). To connect the transmitter to MI70, you need the optional MI70
connection cable (Vaisala order code 219980SP). For instructions on connecting the
transmitter to MI70 and general information about using MI70, see Overview of MI70 Support
(page 30).
Before adjusting the measurement with MI70, turn the adjustment trimmer(s) on
the transmitter component board back to the ±0 position. When you adjust the
measurement with MI70, the position in which the trimmer is at that moment
becomes the new ±0 point.
More Information
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Connecting HMD60 to MI70 Indicator (page 31)
7.4.1 1-Point Adjustment Using Reference Environment
• A humidity or temperature reference (for example, Vaisala HMK15 Humidity
Calibrator) to create the reference condition used in the adjustment.
• MI70 hand-held indicator and MI70 connection cable 219980SP
This example describes an RH adjustment with a humidity calibrator. The same
steps can be applied to temperature calibration with a temperature reference.
1. Prepare the humidity reference for the adjustment point you are using (for example, 11
%RH).
2. Connect the transmitter to MI70 indicator with the MI70 connection cable 219980SP.
3. Turn on the MI70 indicator.
4. Insert the probe head into the reference environment.
5. Start the adjustment sequence from Main menu > Functions > Adjustments.
HMD65 User Guide M212243EN-A
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