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Power Quality Analyzer Model 3945-B
15
3.2.2 Current Inputs
Operating Range: 0 to 1V
Input Impedance:
100kΩ for current probe circuit and 12.4kΩforAmpFlex
®
circuit
Overload: 1.7V
3.2.3 Accuracy Specifications (excluding current probes)
Function Range Display Resolution Accuracy
Frequency 40 to 69Hz 0.01Hz ±0.01Hz
Single phase RMS voltages
(Vrms,Vdem)
15V to 480V
0.1V ±0.5% ± 2cts
Phase-to-phase RMS voltages
(Urms,Udem)
15V to 960V
0.1V ±0.5% ± 2cts
DC voltage component 15V to 680V
0.1V ±1% ± 5cts
Single phase peak voltages
(Vpp,Vpm)
15V to 680V
0.1V ±1% ± 5cts
Phase-to-phase peak voltages
(Upp,Upm)
15V to 1360V
0.1 V if I < 1000 V
1 V if I
≥ 1000 V
±1% ± 5cts
Currentprobe(Arms,Adem) Inom/1000 to 1.2 Inom
0.1 A if I < 1000 A
1 A if I
≥ 1000 A
±0.5% ± 2cts
AmpFlex
®
(Arms,Adem) 10A to 6500A
0.1 A if I < 1000 A
1 A if I ≥ 1000 A
±0.5% ± 1A
DCcurrent(MR193) 1A to 1400A
0.1 A if I < 1000 A
1 A if I
≥ 1000 A
±(1%+1A)
Peak Current (App,Apm) 0to1.7xInom
0.1 A if I < 1000 A
1 A if I
≥ 1000 A
±(1%+1A)
PeakCurrent(AmpFlex
®
) 10 to 9190A
0.1 A if I < 1000 A
1 A if I
≥ 1000 A
±(1%+1A)
CrestFactor(Vcf,Ucf,Acf) 1.00 to 9.99
0.01 ±1% ± 2cts
RealPower(W)
Clamp-onandAmpFlex
®
Clamp-on
AmpFlex
®
0W to 9999kW
Cos ϕ ≥ 0.8
Cos ϕ 0.2 to < 0.8
Cos ϕ 0.5 to < 0.8
4 digits
(10000cts) ±1% ± 1ct
±1.5% ± 10cts
±1.5% ± 10cts
ReactivePower(VAR)
Clamp-onandAmpFlex
®
Clamp-on
AmpFlex
®
0W to 9999kW
Sin ϕ ≥ 0.5
Cos ϕ 0.2 to < 0.8
Cos ϕ 0.5 to < 0.8
4 digits
(10000cts) ±1% ± 1ct
±1.5% ± 10cts
±1.5% ± 10cts
ApparentPower(VA) 0VA to 9999kVA 4 digits ±1% ± 1ct
PowerFactor(PF,DPF) -1.000 to 1.000
Cos
ϕ ≥ 0.5
Cos ϕ 0.2 to < 0.5
0.001
±1.5% ± 1ct
±1.5% ± 1ct
Tangent(Tan)forVA
≥ 50VA
-32.76 to 32.76
0.001 Tan ϕ < 10
0.01 Tan ϕ < 10
±1° on ϕ
±1° on ϕ
ActiveEnergy(Wh)
Clamp-onandAmpFlex
®
Clamp-on
AmpFlex
®
0Wh to 9999MWh
Cos ϕ ≥ 0.8
Cos ϕ 0.2 to < 0.8 Cos
ϕ 0.5 to < 0.8
4 digits
(10000cts) ±1% ± 1ct
±1.5% ± 1ct
±1.5% ± 1ct
ReactiveEnergy(VARh)
Clamp-on
0VARh to 9999MVARh
Sin Φ ≥ 0.5
Sin Φ 0.2 to < 0.5
4 digits
±1.5% ± 1ct
±2.5% ± 1ct
ReactiveEnergy(VARh)
AmpFlex
®
0VARh to 9999MVARh
Sin ϕ ≥ 0.5
Sin ϕ 0.2 to < 0.5
4 digits
±1.5% ± 1ct
±2.5% ± 1ct