Calibration With The Hmi41 Software; 2.1 One-Point Humidity Calibration - Vaisala HUMICAP HMP41 User Manual

M210316EN-A
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

RH
Td
T
P
set min max
set
set
RH
set
RH
set
RH
Turn the HMI41 indicator on. Within 1-2 seconds
%
°C °F
press simultaneously buttons MODE and HOLD
°C °F
until the text SEtUP appears.
g/m h Pa
hyst hold Lo bat Hi
Wait a few seconds.
Press ENTER eight times.
°C
Press MODE twice.
Press ENTER to activate one point humidity
calibration.
The reference humidity reading stored in the HMI41
memory is blinking. Change it to the correct value
%
(see calibration table) with buttons
reading changes in steps of 0,1 %. Press ENTER.
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.
HMI41 AND PROBES
Operating Manual
or . The
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