20
Power Quality Analyzer Model 3945
Factors affecting accuracy
(% of the output signal)
Conditions
Range
Error
Ambient temperature
14° to 131°F (-10° to 55°C)
≤
150 ppm/K or
0.15% per 10K
Relative humidity
10 to 35°C 85%
< 0.2%
Frequency response
40Hz to 3kHz
40Hz to 1kHz: < 0.7%
1 to 3kHz: < 2%
Positions of the cable in the jaws
–
< 0.5% to 50/60Hz
Adjacent conductor carrying a
60Hz AC current
Conductor in contact with
the sensor
≤
15mA/A
Crest factor distortion
≤
3 and peak current = 200A
≤
3%
3.8 AC Current Probe AmpFlex™ Probe
(with Model 3945)
Nominal Range:
3000A
AC
Measurement Range:
10A to 6500A
AC
NOTE:
Currents below 9A will be displayed as zero on the PowerPad™ with this
probe
Probe Output Signal:
140mV
AC
/3000A
AC
at 50/60Hz
NOTE:
Output is proportional to the amplitude and frequency of the measured current.
Sensor:
Length = 24” (610mm); Ø = 7.64” (190mm)
Length = 36” (910mm); Ø = 11.46” (290mm)
Safety:
EN 61010-1 and 2, 1000V, CAT III, POLL 2
Reference Conditions:
Ambient temperature
64 to 82°F (18 to 28°C)
Humidity
20 to 75% of RH
Position of conductor in the sensor
Centered
Continuous magnetic fi eld
<40A/m (earth’s magnetic fi eld)
External alternative magnetic fi eld
None present
External electric fi eld
None present
Frequency
10 to 100Hz
Type of signal measured
Sinusoidal
Accuracy
NOTE:
Add PowerPad™ accuracy ±0.5% ± 1ct
Primary current (A
AC
)
10 to 100A
100 to 6500A
Accuracy (% of the output signal)
≤
3%
≤
2%
Phase shift (°)
≤
1°
≤
0.5°
