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Greenlee DM-860A Manual

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•Dual Digital Display: This meter can display two measurements, such as AC voltage and frequency,
at the same time. Display combinations are shown using large symbols to indicate the measurement
on the primary display and small, raised symbols to indicate the measurement on the secondary
display. For example, “VAC
Hz
” means the primary display contains the AC voltage measurement, and
the secondary display contains the frequency measurement.
•VFD ~V and VFD Hz: These functions use filtering and noise-rejection algorithms to make accurate
voltage and frequency measurements on most variable frequency drives. The voltage measure-
ment automatically selects the 500 volt range. Use the RANGE button to select other ranges only
when needed. The sensitivity for VFD frequency measurements depends on voltage range and input
frequency. Refer to “Frequency – Line Level” in the “Accuracy” section of this manual.
•SELECT: Press momentarily to toggle between functions, measurement modes, or display modes.
The last used setting becomes the default when that function is selected again. To change the
default, select a new setting. The setting will be stored in nonvolatile memory.
•RANGE: Press once to enter the manual ranging mode. The icon will disappear from the
display. Press repeatedly to step through the ranges. Press and hold to return to the automatic
ranging mode.
Note: When using CREST, REC, HOLD, or ∆ mode, pressing RANGE will cause the meter to exit that
mode.
•∆: Finds the difference between two measurements. While taking a measurement, press ∆ to set the
display to zero. The ∆ icon will appear on the display. Take the second measurement. The value on
the display will be the difference between the two measurements. Press again to exit this mode.
This feature applies to the main display only.
•HOLD : Press momentarily to hold the present value on the display. Press again to exit this mode.
This feature does not affect the bar graph.
•CREST : Press momentarily to activate the crest recording mode.The input value is measured
every 1 ms in this mode. and “MAX” will appear on the display. The LCD will display the maximum
crest value. The meter will beep whenever the maximum or minimum is updated. Press repeatedly to
select the desired display: maximum or minimum crest value. Press and hold to exit this mode.
The automatic power off feature is disabled when using this function.
Note: When using the CREST function, pressing RANGE will cause the meter to exit this mode.
•REC : Press momentarily to activate the MAX/MIN/AVG recording mode. The input value is
measured every 50 ms in this mode. “MAX MIN” and “AVG” will appear on the display. The LCD will
display the actual input value. The meter will beep whenever the maximum or minimum is updated.
Press repeatedly to select the desired display: maximum, minimum, average, or actual input. Press
and hold to exit this mode.
The automatic power off feature is disabled when using this function.
Note: When using the REC function, pressing RANGE will cause the meter to exit this mode.
• : Press and hold until backlight illuminates. Press and hold again to turn off. The backlight
automatically turns off after approximately 30 seconds to extend battery life.
Using the Features
… 8 …


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