Extech Instruments MultiMaster MM560A User Manual page 7

Digital multimeter series with pc interface
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DCV
A
Note: Line Level Frequency measuring function input sensitivity varies automatically with voltage (or
current) function range selected. The lower the measuring range the higher the sensitivity. That is, mV
function has the highest and the 1000V range has the lowest as in voltage function ranges. It is
recommended to first measure the signal voltage (or current) level then activate the Hz function in that
voltage (or current) range to automatically get the most appropriate trigger level. When activated from
voltage function, you can also press the RANGE button momentarily to select another trigger level
range manually. The analog bargraph pointer will point at the selected trigger level range scale 1, 2, 3,
or 4. If the Hz reading is unstable, select lower sensitivity to avoid electrical noise. If the reading shows
zero, select higher sensitivity.
V1.1 8/12
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ACV
A
7
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Hz
A
MM560A-MM570A-EU-EN

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