Taking Measurements; Starting The Measurements - Vaisala HUMICAP HMP41 User Manual

M210316EN-A
4.

TAKING MEASUREMENTS

4.2

Starting the measurements

Before starting the measurements with the HMI41 and appropriate probe,
remember to allow enough time for stabilization.
Turn the power on with the ON/OFF button and the following appears:
RH
Td
T
P
set min max hyst hold Lo bat Hi
Within a couple of seconds, the display changes to show the software version
and then the probe type indication (41.45 or 42.46):
NOTE: if the following appears, check that the probe is correctly connected:
If the software version does not appear, it is smaller than 1.02 and the
indicator cannot be used with the HMP46 probe. If the probe type does not
appear, the indicator or the probe is of a previous version and the automatic
recognition is not possible; give the setting manually (see Chapter 8).
After a couple of seconds, the battery voltage appears on the display with an
indication of the battery charge (high or low):
If the battery voltage is higher than 4.75 V, the text on the lower righthand
corner is "bat HI" and after a few seconds, the HMI41 automatically displays
the RH and T readings. If the voltage is 4.65...4.75 V, the text is "Lo bat" and
the batteries should be replaced (see Chapter 3.1). If the voltage is lower than
%
°C °F
°C °F
g/m h Pa
bat Hi
HMI41 AND PROBES
Operating Manual
5