Operation - Extech Instruments MA260 User Manual

Operation
CAUTIONS
Read and understand all WARNING and CAUTION statements listed in the safety section of this
manual prior to use. Note that the meter Powers up in the Resistance/Continuity mode.
Powering the Meter
1. Press the Power‐Hold button to power the meter. Check batteries if unit fails to power up.
2. Press and hold the Power‐Hold button until OFF appears on the display, release the power
button to power off the meter.
3. The meter has an Auto Power OFF feature (APO) where the meter is switched OFF after 20
minutes of inactivity. To disable this feature see the following section.
Note: The meter displays the battery capacity when powering up. Please replace the battery when
the display shows <10% battery power.
Disable Auto Power OFF
Note: The meter will auto power OFF after 20 minutes of inactivity. To defeat this feature, follow
the steps below.
1. With the meter OFF, press and hold the power button until APO flashes three (3) times.
2. The Auto Power OFF function will now be disabled until the next cycle of power. Note that the
APO display icon is always showing when the APO feature is active.
Self‐Test and Related Cautions
The meter performs a Self‐Test routine while it is powering up. A battery status percentage value
appears on the screen, if it reads 10% or lower, replace the batteries.
CAUTION: Do not take a measurement while powering up the meter. Doing so will cause a
Self‐Test failure and FAIL will display.
CAUTION: Do not use the meter if FAIL is displayed on the LCD. Power down the meter
and start again. Do not attempt measurements until the meter is fully powered up.
CAUTION: If the meter is used in the vicinity of equipment that is generating
electromagnetic interference, the display may become unstable or the measurement displayed
may be widely inaccurate.
Display Backlight
With the meter powered ON, press the backlight button to switch the backlight ON or OFF. Note
that excessive use of the backlight will shorten the battery life.
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