Using the Features
• Automatic Power Off To extend battery life, the meter will shut itself off after approximately
17 minutes of inactivity. To restore power, press any button. To disable this feature, press
RANGE while turning the meter on.
• MAX/MIN (DM-820 only) Press momentarily to begin recording the input. MAX MIN will
appear on the display. The meter will beep whenever the minimum or maximum is updated.
When using the MAX/MIN function, press momentarily to cycle through the maximum,
minimum, difference (MAX – MIN). Press and hold to exit this mode.
The Automatic Power Off feature is disabled when using this function.
• CREST (DM-820 only) Press momentarily to capture the crests of AC or DC voltage or
current.
and MAX will appear on the display. The meter will capture and hold a signal
peak with a duration as short as 5 ms. Press momentarily to cycle through the maximum
crest, minimum crest and maximum – minimum crest (peak to peak). Press and hold to exit
this mode.
The Automatic Power Off feature is disabled when using this function.
∆
•
(DM-820 only) 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.
•
(DM-820 only) Press momentarily to change the resolution of the bar graph.
•
Press and hold until LCD illuminates. The lamp turns off after 30 seconds to extend
battery life.
• SELECT Press momentarily to toggle between functions, or to toggle between AC and DC
when measuring current and millivolts.
• RANGE Press once to enter the manual ranging mode. The
the display. Press repeatedly to step through the ranges. Press and hold to return to the
automatic ranging mode.
Note: When using MAX/MIN, HOLD, or
exit that mode.
• Hz Press to measure frequency.
Note: The sensitivity of the frequency measurement function varies with the measurement
range. To automatically select a sensitivity level, measure the voltage level first, then press
Hz . If the reading becomes unstable, or if the display is blank, manually change the
sensitivity by momentarily pressing RANGE.
• 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.
8
∆
mode, pressing RANGE will cause the meter to
icon will disappear from