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HMI41 AND PROBES

M210316EN-A Operating Manual

2. CALIBRATION WITH THE HMI41 SOFTWARE

This quick reference is meant for those users who already know how to use the

HMI41 indicator. The operating manual gives more detailed instructions.

NOTE: it is recommended that the calibration is done with trimmer

potentiometers of the probe. However, if only one probe is being used, the

calibration can also be done according to the following instructions.

2.1 One-point humidity calibration

set min max hyst hold Lo bat Hi

Pahg/m

°C °F

°C

°F

Turn the HMI41 indicator on. Within 1-2 seconds

press simultaneously buttons MODE and HOLD

until the text SEtUP appears.

Wait a few seconds.

set

°C

Press ENTER eight times.

set

Press MODE twice.

set

Press ENTER to activate one point humidity

calibration.

set

The reference humidity reading stored in the HMI41

memory is blinking. Change it to the correct value

(see calibration table) with buttons ▲ or ▼. The

reading changes in steps of 0,1 %. Press ENTER.

RH %

The indicator shows the value that the probe is

measuring. Wait at least 10 minutes for the reading

to stabilize and acknowledge it by pressing ENTER.

Press ENTER again to conclude the calibration.

Calibration was successful. If it was not succesful,

some other text appears on the display (e.g. too

close, err offst or err gain). Perform the calibration

again.

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Vaisala HUMICAP HMP46 Guía de usuario Pagina 55