Vaisala Calibration of Digital Transmitters with HMI41 - Manual (Page 10)

User's Guide ______________________________________________________________________
8 ___________________________________________________________________ M210777EN-B
Calibration is quick and easy to perform. In calibration, HMI41
measures relative humidity with the reference probe and receives the
RH information from the transmitter. HMI41 sends the measured or
manually set reading to the transmitter which makes calculations and
necessary corrections. The data is then stored in the transmitter
memory.
Selecting HMI41 Calibrator
Function
The desired calibrator function is selected in the HMI41 setup menu.
To enter the setup mode, first press the ON/OFF button and the
following appears:
RH
set min max hyst hold Lo bat Hi
P Pa h g/m
T
Td °C °F
°C °F
%
Then release the ON/OFF button and within 1 ... 2 seconds press both
ENTER and MODE buttons until the following text appears on the
display:
After a few seconds, the text changes automatically to show the
following:
set
°C
If the basic settings of HMI41 (display units, automatic power off
function, display quantities and pressure) have to be changed, please
refer to the HMI41 User's Guide. Otherwise, press ENTER repeatedly
until the following text appears: