Amprobe AM91RS Digital-Multimeter - Manual (Page 14)

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40000 counts high resolution slow mode
Press the 40000 button momentarily to enter the 4-3/4 digit high resolution slow mode.
The digital display updates 1.25 times per second nominal to give you smooth readings
as well as the full accuracy of the meter. Press the 4000 button momentarily to return to
the power up default 3-3/4 digit fast mode. The digital display updates 5 times per second
nominal to give you the maximum measuring speed of the meter.
RECORD mode
Press and hold the RECORD button for one second or more to activate recording mode
with nominal 50ms sampling speed in most functions. The LCD annunciators “R” &
“MAX-MIN AVG” 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), Maximum minus Minimum (MAX MIN), and Average (AVG)
readings. Press the button for 1 second or more to exit.
Note:
1. Auto Power Off feature will be disabled automatically in this mode.
2. To retain the readings, press the HOLD button to stop updating the measurement