METREL MD 9231 Manual Del Usuario página 9

MD 9231 Industrial TRMS AC/DC Current Clamp Meter Operation
4 OPERATION
WARNING: Before and after hazardous voltage measurements, test the voltage function on a known source
such as line voltage to determine proper meter functioning.
ACV, DCV, DC+ACV, EF (NCV), & Line-level Hz functions
Inputs, other than that of EF as described below, are made through the test lead terminals COM/+. Press
SELECT button momentarily to select the subject functions in sequence. Last selection will be saved as power
up default for repeat measurement convenience. Press Hz button momentarily to toggle the Line-level Hz
function.
Note
ACV (and hence AC+DCV & Line-level Hz) function is equipped with digital low-pass filter, and is capable of
dealing with VFD (Variable Frequency Drives) signals. It also improves ACV reading stability in noisy electrical
environments.
Electric Field EF-Detection
The meter displays "EF" when it is ready. Signal strength is indicated as a series of bar-graph segments on
the display together with variable beep tones.
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