Vaisala hmt120 - Calibration Commands

Syntax Description
Example:
send
RH= 25.12 % T= 24.91 'C
>
4.8 Calibration Commands
Serial commands that are related to calibration are described in this section. For
the actual calibration procedures, see Calibration and Adjustment Overview
(page 52).
Table 18 CRH Command
Syntax Description
crh<cr>
Use the crh command to perform a 1-point or 2-
point humidity (RH) calibration.
When performing a one-point calibration, you
need to place the probe in a single humidity
reference with RH < 50%. Run the command and
enter the exact RH of the reference after the
measurement has stabilized. Exit the command
by pressing the ESC key before proceeding to
the second point (see example 3).
To update the value, press ENTER without
inputting a value. For two-point calibration, the
first point requires a RH < 35% humidity
reference, the second point must be RH > 50%.
Example 1: 1-point calibration
>crh
RH: 11.29915720 Ref1 ? 11.3
Press ENTER to continue or ESC to exit
OK
>
Example 2: 2-point calibration
>crh
RH: 11.29915720 Ref1 ? 11.3
Press ENTER to continue or ESC to exit
RH: 75.04306440 Ref2 ? 75
OK
>
HMT120 User Guide M211244EN-C
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