18
Power Quality Analyzer Model 3945-B
3.2.2 Current Inputs
Operating Range:
0 to 1V
Input Impedance:
100k
Ω
for current probe circuit and 12.4k
Ω
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
®
&
MiniFlex
®
*
(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
®
&
MiniFlex
®
*
)
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
®
&
MiniFlex
®
*
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
®
&
MiniFlex
®
*
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
®
&
MiniFlex
®
*
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
®
&
MiniFlex
®
*
0VARh to 9999MVARh
Sin
ϕ ≥
0.5
Sin
ϕ
0.2 to < 0.5
4 digits
±1.5% ± 1ct
±2.5% ± 1ct