Display Backlight; Low Battery Indication; Auto Power Off - Extech Instruments EX570 User Manual

Relative mode
The relative measurement feature allows you to make measurements relative to a stored reference
value. A reference voltage, current, etc. can be stored and measurements made in comparison to
that value. The displayed value is the difference between the reference value and the measured
value.
1. Perform the measurement as described in the operating instructions.
2. Press and Hold the REL button to store the reading in the display and the "REL" indicator will
appear on the display.
3. The display will now indicate the difference between the stored value and the measured value.
4. Press and Hold the REL button to exit the relative mode.
PEAK HOLD
The Peak Hold function captures the peak AC voltage or current. The meter can capture negative or
positive peaks as fast as 1 millisecond in duration. Press the PEAK button. "PMAX" will appear in
the display. The meter will update the display each time a higher positive peak occurs. Press the
PEAK button again to exit the mode.

DISPLAY BACKLIGHT

Press the HOLD/
off after 10 seconds.
HOLD
The hold function freezes the reading in the display. Press the HOLD key momentarily to activate or
to exit the HOLD function.

LOW BATTERY INDICATION

When the low battery

AUTO POWER OFF

The auto off feature will turn the meter off after 15 minutes. To disable the auto power off feature,
hold down the SELECT button and turn the meter on. "APO d" will appear in the display. Turn the
meter off and then on again to re-enable the auto power off feature.
key for >1 second to turn the backlight on. The backlight will automatically turn
icon appears in the display, the battery should be replaced.
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