Making Relative Measurements; Disabling Auto Power Off (Apo) - General CM660 User Manual

readout to show the l rgest value of the parameter
being measured since entering that measurement
mode. The primary display and the analog bar graph
below it will continue to show real-time readings.
Pressing the MAX/MIN button a second time switches
the secondary readout to show the sm llest value of
the parameter being measured since entering that
measurement mode. The primary display and the
analog bar graph below it will continue to show real-
time readings.
Pressing the MAX/MIN button a third time resumes
"normal" display operation, with different values in
the primary and secondary readouts.
When the MAX/MIN button is pressed, the meter will
automatically exit Auto Ranging mode and enter
Manual ranging mode using the full-scale range in
effect at that moment.
Making Relative Measurements. Pressing the
ZERO/REL button during measurement of a current,
voltage, resistance or capacitance freezes the value
being measured at that moment on the secondary
readout. The term REL will appear on the top line of the
LCD to indicate operation in this special mode. In REL
mode, the primary readout will show the difference
between ongoing measurements and the frozen value.
REL mode is useful for tracking changes in dynamic
processes or deviations from baseline readings.
When the REL button is pressed, the meter will
automatically exit Auto Ranging mode and enter
Manual ranging mode using the full-scale range in
effect at that moment.
To exit REL mode and resume operation in "normal"
display operation, press the ZERO/REL button again.
Disabling Auto Power Off (APO). By default, the meter
will automatically power itself off if no front-panel
buttons are pressed within any span of 20 minutes.
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