Vaisala HM44 - Manual (Page 21)

Chapter 5 ____________________________________________ Humidity measurements in concrete
VAISALA __________________________________________________________________________ 19
Measurement readings on display
Relative humidity and temperature readings appear automatically after the battery charge
indication.
Other readings (dewpoint temperature, absolute humidity, wet bulb temperature, mixing ratio)
appear on the display by pressing the button MODE. If it is pressed once, dewpoint
temperature (Td) reading is displayed, and further pressings bring one of the other quantities
on the display.
HOLD-mode
Press the HOLD button to freeze the display to show the current readings:
RH
hold
T °C
%
The normal display mode returns with buttons MODE or ENTER.
If the indicator turns itself off with the automatic power-off function during the HOLD mode,
it wakes up in the same mode when turned on again. The text ‘hold’ is blinking and the
indicator can be returned to the normal display mode with any button except ON/OFF.
MIN and MAX modes
Press the button HOLD again when the indicator is in the HOLD mode, the minimum
readings measured after power-up appear (if the text ‘hold’ is blinking, the HMI41 must first
be returned to the normal display mode, see previous section):
RH
min
T °C
%
The indicator returns to the normal display mode with buttons MODE or ENTER.