UNI-T UT253A, Operating Manual

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VI. Operating Instructions
1. Power on/off
Press POWER button to power on, display LCD and enter into measuring
mode, repress to turn off the meter. The meter will automatically switch off
15 minutes later after power on. You should change the battery if dark LCD
appears after power on and may be caused by low battery voltage.
Under data save status, you need to press HOLD button to cancel the
operation before press POWER button to power off the meter.
2. Backlight Control
Use LIGHT button to control backlight, suitable for dark sites and at night.
The default is backlit status after power on.
3. Data Hold and Save
Under measuring mode, press HOLD button to maintain displayed data,
indicated by
HOLD icon, and repress to cancel the operation. The meter
will automatically number current data at the time of saving, indicated by
group number such as
SAVE NO. 001 . Maximum data storage is 200
sets and is achieved when FULL icon shows
4. Data Access and Exit
Under measuring mode, Press MENU to access data research with
indication of
READ icon. You can start data research from R 001 ,
press Up button to increment by 1, down button to increment by 10
and MENU button to exit this status and return to measuring mode.
5. Data Transmission to PC
The accessory RS232 connection line is used for communication of the
meter with PC. With the meter power on and the software running, several
following operations such as history lookup, data recall, save, report sheet,
history printing can all be performed. The more data the meter saves,
more time it will take to read out. History data can be saved in Txt or Excel
format.