Power Quality Analyzer Model 3945
15
Function
Range
Display
Resolution
Accuracy
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° ± 1ct
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 fl icker (Vfl k)
0.00 to 9.99
0.01
not specifi ed
3.2.4 Nominal Range of Use
Harmonics:
THD (I) : 40%; THD (U) : 20%
Magnetic fi eld:
< 40.0A/m (Earth’s magnetic fi eld)
Electrical fi eld:
< 3V/m
3.2.5 Power
Supply
AC Power
(internal power supply)
Operating Range:
230V
AC
± 20% and 110V
AC
± 20%
Max Power:
30VA
Battery Power Supply
(allows use in the event of a power interruption)
Type:
NiMH 3800 mAh
Output:
4-wire (2 for temperature probe)
Raged Voltage:
9.6V
Charge Time:
3 hrs 30 min approx
Battery Life:
>6 hrs with display on
≤
96 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)
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.
