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Power Quality Analyzer Model 3945-B
Function Range Display Resolution Accuracy
ApparentEnergy(Vah) 0VAh to 9999MVAh 4 digits ±1% ± 1ct
Unbalance(Vunb,Aunb)
three phase supply
0% to 100%
0.1% ±1% ± 1ct
Phaseangle(V/I;I/I;V/V)
-179°to+180°
1° ±2°
Harmonics ratios
F=40to69Hz
(Vrms>50V)
(rms>Inom/100)
0% to 999%
1 to 50th harmonic
0.1% ±1%+5cts
Harmonics angles
F=40to69Hz
(Vrms>50V)
(rms>Imax/100)
-179°to+180°
1 to 25
26 to 50
1°
±3°
±10°
Total harmonics distortion
(Vthd,Athd,Uthd)
0% to 999%
50
th
harmonic
0.1% ±1%+5cts
CurrentKfactor(Akf) 1 to 99.99
0.01 ±5% ± 1ct
Voltageicker(Vk) 0.00 to 9.99
0.01 notspecied
Vdem, Adem and Udem = Values measured on half cycle (allow to get a measurement with positive and
negative values)
Vpm, Upm and Apm = Peak values min.
3.2.4 Nominal Range of Use
Frequency: 40 to 69Hz
Harmonics:THD(I):0to40%;THD(U):0to20%
Magnetic eld:<40.0A/m(Earth’smagneticeld)
Electrical eld: <3V/m
Relative Humidity: 10 to 90% without condensation
3.2.5 Power Supply
AC Power (internalpowersupply)
Operating Range: 230VAC ± 20% and 110VAC±20%(88to276VAC)
Max Power: 30VA
Battery Power
(allowsuseintheeventofaninterruption)
Type: NiMH 3800 mAh
Output:4-wire(2fortemperatureprobe)
Rated Voltage: 9.6V
Charge Time: 3hrs30minapprox
Battery Life: >8hrswithdisplayon
≥35hrswithdisplayoff(recordingmode)
Operating Temperature:32°to122°F(0°to50°C)
Recharging Temperature: 50°to104°F(10°to40°C)
Storage Temperature: -4to+122°F(-20to+50°C)for≤30days
NOTE: The battery starts to charge when the power cord is connected. When the
battery is charged, the instrument uses the current supplied by the power supply,
without drawing from the battery.