Operation; Automatic And Manual Range; Lcd Backlight; Maximum And Minimum Readings - Extech Instruments EX820A User Manual

5

Operation

NOTE
Read and understand all Warning and Caution statements in this user manual prior to use.
Set the function switch to the OFF position when the meter is not in use.

5.1 Automatic and Manual Range

In the voltage, resistance, capacitance, and frequency modes, the meter auto-
matically selects the optimum range. To use manual range mode, follow the
steps below.
1. Press the RANGE button. The AUTO display icon will switch off.
2. Now use the RANGE button to step through the available ranges.
3. To return to the automatic mode, long press the RANGE key for 2 seconds.
The AUTO icon will reappear.

5.2 LCD Backlight

The LCD is equipped with backlighting for easier viewing, especially in dimly
lit areas. Short press the backlight button (right side of meter) to switch the
backlight on or off. The backlight automatically switches off after 3 minutes.

5.3 Maximum and Minimum Readings

1. Press the MAX/MIN button. The MAX display icon will appear, and the
meter will display the highest reading. The display will only update when a
higher reading is measured.
2. Press the MAX/MIN button again. The MIN display icon will appear, and
the meter will display the lowest reading. The display will only update
when a lower reading is measured.
3. To exit the mode, long press the MAX/MIN button for 2 seconds.

5.4 Data Hold

To freeze the displayed reading, press the HOLD button, the HOLD icon will
appear. Press the HOLD button to return to normal operation.
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