Power Quality Analyzer Model 3945-B
19
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 flicker (Vflk)
0.00 to 9.99
0.01
not specified
*Note:
MiniFlex
®
specified up to 1000A only
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 field:
<40.0A/m (Earth’s magnetic field)
Electrical field:
<3V/m
Relative Humidity:
10 to 90% without condensation
3.2.5 Power Supply
AC Power
(internal power supply)
Operating Range:
230V
AC
± 20% and 110V
AC
± 20% (88 to 276V
AC
)
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:
6 hrs 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.