Vaisala HUMICAP HMP41 User's Guide download pdf (Page 39)

Chapter 4 ________________________________________________________________ Operation

VAISALA _______________________________________________________________________ 37

Restore Probe RH Factory Calibration

Use the CRHCLR to restore the probe RH factory calibration.

CRHCLR<cr>

Example:

>crhclr

Calibrate Temperature Measurement

Use the CT command to perform a one-point or two-point temperature

(T) calibration.

CT<cr>

When performing a one-point calibration, you need to place the probe in

a single temperature reference. Run the command and enter the exact

temperature of the reference after the measurement has stabilized. Exit

the command by pressing the ESC key before proceeding to the second

point. To update the value, press ENTER without inputting a value.

For two-point calibration, the second reference point must be at least

20 ºC warmer than the first. The measurement reading for the second

point will appear when this requirement is met.

Example 1: One-point calibration

>ct

T 21.9827 Ref1 ? 22

Press ENTER to continue or ESC to exit

Example 2: Two-point calibration

>ct

T 22.0007 Ref1 ? 22

Press ENTER to continue or ESC to exit

T 44.9847 Ref2 ? 45

Example 3: No calibration, only updating the value

>ct

T 22.0007 Ref1 ?

T 22.0145 Ref1 ?

Calibration terminated with ESC

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Vaisala HUMICAP HMP41 User's Guide Page 39