MD 9250 Clamp Meter Series Operation
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Backlighted LCD display
Press the SELECT button for 1 second or more to toggle the LCD backlight. The
backlight will also be turned off automatically after 32 seconds to extend battery life.
Relative-Zero ( ) mode
Relative-Zero allows the user to offset the meter consecutive measurements with the
main display displaying reading as the reference value. Press the REL button
momentarily and release to toggle Relative-Zero mode.
Manual or Auto-ranging
Press the RANGE button momentarily and release to select manual-ranging, and the
meter will remain in the range it was in, the LCD turns off. Press the button
again to step through the ranges. Press and hold the button for 1 second or more and
release to resume auto-ranging.
Note: Manual-ranging feature is not available in Hz and function ranges.
Set Beeper Off
Press the RANGE button while turning the meter on to temporarily disable the Beeper
feature. Turn the rotary switch OFF and then back on to resume.
Auto-Power-Off (APO)
The Auto-Power-Off (APO) mode turns the meter off automatically to extend battery life
after approximately 34 minutes of no rotary switch or push button operations. To wake
up the meter from APO, press the SELECT button momentarily and release or turn the
rotary switch OFF and then back on. Always turn the rotary switch to the OFF position
when the meter is not in use
Disabling Auto-Power-Off
Press and hold the SELECT button while turning the meter on to temporarily disable the
Auto-Power-Off (APO) feature. Turn the rotary switch OFF and then back on to resume.
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