Extech Instruments PQ3350 User Manual page 36

For example,
Range of CT (Current Transformer) Ratio: 1 to 600
AC Apparent Power (VA, from 0.000VA to 9999 KVA):
AC Reactive Power (VAR, from 0.000 VAR to 9999 KVAR):
AC Active Energy (mWH, WH, or KWH, from 0 mWH to 999,999 KWH)
AC Current
(50 or 60 Hz, Auto Range, True RMS, Crest Factor < 4, CT=1)
Model PQ3350+PQ3110 (Overload Protection AC 200A)
Range
0.04 – 1 A
0.4 – 10 A
4 – 100 A
Model PQ3350+PQ3120 (Overload Protection AC 2000A)
Range
10.00A
4A - 100.0A
40A – 1000.0 A
Model PQ3350+PQ3220 (Overload Protection AC 3000A)
Range
0 – 300.0A
300.0 – 3000A
Model PQ3350+PQ3210 (Overload Protection AC 1200A)
Range
0 – 120.0A
120.0 – 1200A
4, 5, 6
For CT ≠ 1, the accuracy in percentage is the same (±0.5%). But the
additional digits should be multiplied by the CT ratio.
For example,
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±0.8W becomes ± 0.8W * CT ratio
VA = V r.m.s. x A r.m.s
VAR = √ (VA
WH = W * Time (in hours)
Resolution
0.001 A
0.01 A
0.1 A
Resolution
0.001A/0.01A
0.01A/0.1A
0.1A/1 A
Resolution
0.1A
0.1A / 1A
Resolution
0.1A
0.1A / 1A
±0.5A becomes ±0.5A * CT ratio
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2 2
– W )
Accuracy of Readings
Accuracy of Readings
Accuracy of Readings
Accuracy of Readings
36
±0.5% ± 0.05A
±0.5% ± 0.05A
±1.0% ± 0.5A
–
±0.5% ± 0.5A
±0.5% ± 5A
±1% of range
±1% of range
±1% of range
±1% of range
PQ3350 V5.2 11/10
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5
6
6