Display symbols
MAX
MIN
HOLD
_
+
°C
°F
WET BULB
DEW POINT
%RH
Initial operation
Inserting the battery
Before beginning to use this measuring device, you must first install a new 9 V
block battery. Battery installation is described in the „Maintenance and Cleaning"
section.
Device functions
The HT-200 has various extra functions that ease measurement and handling and
which extend its range of application.
These extra functions are:
Auto power OFF function
To save on the unnecessary usage of battery power, an automatic switch-off func-
tion has been incorporated. The device will be automatically switched off if no but-
ton is pressed within a period of about 15 minutes. The device can be switched on
again using the „ON/OFF" button (5).
The Auto power OFF function can be deactivated for permanent measurements. To
deactivate this function, press and hold down the „HOLD" button (6) before switch-
ing on and simultaneously press the „ON/OFF" button (5).
To activate the Auto power OFF function, turn the device off and on again without
pressing the „HOLD" button. The activated Auto power OFF function is indicated in
the display by the following symbol.
HOLD function
The measured data currently represented are retained in the display. The active
function is shown in the display by „HOLD".
Press the „HOLD" button (6) to activate this function. Press again to switch back to
the normal measuring mode.
The highest value is held continuously
The minimum value is held continuously
The current reading is held
Battery replacement display
Degrees Celsius
Degrees Fahrenheit
Evaporation temperature
Dew point
Relative humidity in percent
Auto Power OFF
15