9
Analogue Bar Graph
The analogue bar graph provides a visual indication of
measurement like a traditional analogue meter needle.
The M8035 and M8037 analogue bar graph updates
up to 128 times per second, showing excellent signal
pattern in detecting faulty contacts, identifying
potentiometer clicks, and indicating signal spikes during
adjustments.
Crest Factor
Crest Factor is the ratio of the Crest (instantaneous peak)
value to the total d.c.+a.c. True RMS value. That is:
A pure sinusoidal waveform has a Crest Factor of 1.414.
A badly distorted sinusoidal waveform normally has a
much higher Crest Factor. If you are measuring a signal
above the DMM’s specified Crest Factor, the DMM may
not produce accurate measurements. M 8 0 3 7 c a n
accurately measure the True RMS value of voltage signal
with a Crest Factor of at least 3.0 at full scale, and 6.0 at
half scale.
d.c.+a.c.True RMS (M8037)
d.c.+a.c. True RMS is a term which identifies a DMM that
Input d.c.+a.c. a.c. Average
Waveform True rms True rms Response
Sine 1,000V 1,000V 1,000V
ERROR= ERROR= ERROR=
0% 0% 0%
CF=1.414 CF=1.414
Full Wave 1,000V 0.436V 0.412V
Rectified Sine ERROR= ERROR= ERROR=
0% 0% 57.9%
CF=1.414 CF=3.247
Half Wave 0.707V 0.546V 0.550V
Rectified Sine ERROR= ERROR= ERROR=
0% 22.7% 22.2%
CF=2.000 CF=2.591
50% Duty 1,000V 0.707V 0.785V
Pulse Train ERROR= ERROR= ERROR=
0% 29.3% 21.5%
CF=1.414 CF=2.000
Table 2. Waveforms and Crest Factors
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