Amprobe AM-140-A - Manual (Page 18)

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MAX/MIN RECORDING mode
Press REC button momentarily to activate MAX/MIN recording mode. The
LCD annunciators “R” and “MAX MIN” turn on. The meter beeps when new
maximum or minimum reading is updated. Press the button momentarily
to read throughout the Maximum (MAX), Minimum (MIN), and Maximum
minus Minimum (MAX-MIN) readings. Press the button for 1 second or more
to exit MAX/MIN recording mode. Auto Power Off feature will be disabled
automatically in this mode.
CREST Capture (Instantaneous Peak Hold) mode
Press CREST button momentarily to activate CREST mode to capture voltage
or current signal duration as short as 0.8ms. This mode is available in DC, AC,
DC+AC modes of voltage and current functions. The LCD annunciators “C” &
“MAX” turn on. The meter beeps when new maximum or minimum reading
is updated. Press the button momentarily to read throughout the Maximum
(MAX), Minimum (MIN), and Maximum minus Minimum (MAX-MIN) readings.
Press the button for 1 second or more to exit CREST capture mode. Auto Power
Off feature will be disabled automatically in this mode.
Relative Zero mode
Relative Zero allows the user to offset the meter consecutive measurements
with the displaying reading as the reference value. Practically MAX/MIN
recording feature readings can also be set as relative reference value. Press the
button momentarily to activate and to exit Relative Zero mode.
500000 high resolution stable mode
In DC voltage and frequency functions, press the 500000 button momentarily
to toggle between the 4-4/5 digits fast mode and the 5-4/5 digits high
resolution stable mode.
Backlighted display
Press the SELECT button for 1 second or more to turn on or off the display
backlight function. It will also be turned off automatically after 30 seconds to
extend battery life.