Greenlee PDMM-20 Manual De Instrucciones página 18

Specifications (cont'd)
Measurement Categories:
Cat II, 450 V
Cat III, 300 V
Sensing: Average sensing, RMS calibrated
* Noise rejection is the ability to reject unwanted signals, or
noise.
• Normal mode voltages are AC signals that can cause
inaccurate DC measurements. NMRR (Normal Mode
Rejection Ratio) is a measure of the ability to filter out
these signals.
• Common mode voltages are signals present at the COM
and + input terminals, with respect to ground, that can
cause digit rattle or offset in voltage measurements.
CMRR (Common Mode Rejection Ratio) is a measure of
the ability to filter out these signals.
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