Vaisala Calibration of Digital Transmitters with HMI41 - Manual (Page 18)

User's Guide ______________________________________________________________________
16 __________________________________________________________________ M210777EN-B
If you prefer, you can change the display to show the difference in
readings. Press HOLD and a text similar to the following appears:
RH %
Numbers on the first line indicate how much the transmitter reading
differs from that of the HMI41 reference probe. Numbers on the
second line indicate the RH measured by the reference probe. You can
return to the previous display by pressing HOLD again.
When the readings have stabilized, press ENTER in either of these
two display modes to conclude the calibration. If the calibration has
been successful, the following text appears:
RH
The data is now stored in the transmitter memory. If the calibration
has not been successful, the following appears:
RH
In this case, perform the calibration again. Whether the calibration
was successful or not, HMI41 always returns to show the selected
calibration mode:
RH
or
RH
After having successfully completed the calibration, turn HMI41 off
and disconnect the cable.