HT Instruments HTA103 Bedienungsanleitung Seite 21

4.3.7. CAL key
The CAL key permits to perform compensation on the temperature measurement due to a
possible error of the input probe. Follow the below steps:
1. Push CAL key longer (>3s) to enter in the calibration section. The below screen is
displayed:
2. The real time value of the temperature is displayed on the main LCD while the
measurement offset value is displayed on the secondary one. The default value is
"0.0". Do not modify this default value if any compensation is required.
3. Push the  or arrow keys respectively to increase or decrease the offset value. The
maximum set values are: 5°C or 9°F with a 0.1°C / 0.1°F resolution
4. Push again CAL key longer (>3s) to save the settings and quit this mode. The
instrument keeps the set value after each shutdown.
4.3.8. Disabling Auto Power OFF
The instrument is provided with Auto Power OFF (APO) feature which automatically
permits to switch it off after 15 minutes of idleness in order to save the internal battery. To
disable this feature follow the below steps:
1. When the instrument is on, push and keep the HOLD/ENTER key
2. Pushing the ON/OFF key long (>1s) the "APO OFF" message is displayed for a while
(see Fig. 4 – left part) and the " " symbol disappears.
3. Repeat the same operation as per point 1 and 2 to activate again the function with
"APO ON" message displayed (see Fig. 4 – right part), the feature is automatically
restored after each shutdown anyway.
Fig. 3: Compensation of temperature probe
Fig. 4: Disable/enable Auto Power OFF
EN – 6
HTA103