Battery life depends on selected display refresh mode (see below). In FAST mode display is
refreshed in shortest possible interval with highest current consumption. In dynamic mode display
is refreshed in interval up to 5 s in case measured values remain stable. Refresh interval is
shortened to approximately 0.7 s only if measured values change. Current consumption in this
mode in usual operation is lower, battery life is up to 4 times longer. The FAST mode is
recommend to use only in cases, when slower display response is not acceptable.
Battery voltage drop below 7 V is indicated with blinking of "BAT" in default display mode
(displaying of actual values) and FAST mode is automatically canceled to save the battery. At the
same time audio indication of alarms is automatically switched OFF.
If instrument is powered from external ac/dc adapter, internal 9V battery is replaced with
rechargeable NiCd accumulator. In usual operation from adapter accumulator is charged only with
small current. If accumulator is totally discharged, its full charging in instrument takes
approximately 100 hours. Instrument with accumulator is not recommended for permanent
operation without ac/dc adapter plugged. Accumulator works only as a standby source in case of
power mains failure.
Switching ON and OFF the instrument
If you wish to use the external temperature probe, connect it before
instrument switching ON. Switch ON the instrument by pressing ON/OFF
key. After switching ON the instrument all symbols on the LCD are
displayed. If the ON/OFF key is being held pressed, all LCD symbols are
displayed till the key is released.
In usual operation instrument then starts the measurement mode and actual
measured values are displayed. It is possible to switch OFF the instrument
anytime and all setting will be saved. Setting will not be saved if battery is
disconnected for long than 1 minute.
Displaying of actual measured values
In this mode is instrument anytime after switching ON. It is possible to
enter this mode from other modes by pressing or by repeating pressing of
MENU key.
Ambient temperature in °C is displayed on the upper LCD line (symbol
INT) and relative humidity (%RH) is displayed on the lower LCD line.
Press DISPLAY key to display other readings - external probe temperature
in °C (symbol EXT) and dew point temperature on lower line (°C DP). If
external probe is not connected properly or temperature is out of measuring
range, symbol „--„ is displayed.
Press DISPLAY key to display other readings - external probe temperature
in °C (symbol EXT) and difference between external temperature and dew
point temperature (symbol DIF). The difference is defined as t dif = t ext -
t dp.
Function HOLD (storing of actual measured values) and minimum a maximum memory
IE-COM-C3631-08
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