EX570 Datasheet, PDF (12/18 Pages) Extech Instruments Corporation. – True RMS Multimeter with IR Thermometer

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/ key for >1 second to turn the backlight on. The backlight will
automatically turn 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 ⁺ icon appears in the display, the battery should be replaced.
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.
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EX570-ENG V2.3 3/09