Extech Instruments 382090 - Page 22

382090 382091 V4.0 09/07
22
Power Factor measurement (COSψ)
Range Resolution Accuracy
-1 ~ 0 ~ +1 0.001 ± (3%rdg + 30d)
•
Measurement method: Calculated from apparent power S and active power P.
•
Displays: Power factor of each channel and the sum of multiple channels.
•
Polarity display: For phase lag (LAG) current is behind voltage: No symbol; for phase
lead (LEAD) current is ahead of voltage: “-” sign
Phase angle measurement (ψ)
Range Resolution Accuracy
±11° to 90° 0.1°
>50A: ± 3°+ 30digits,
25 to 50A: ± 4° + 40digits
(<25A unspecified)
•
Measurement method: Calculated from power factor COSψ
•
Display item: Phase angle of each channel and the sum of multiple channels.
•
Polarity display: For phase lag (LAG: current is behind voltage): No symbol. For phase
lead (LEAD: current is ahead of voltage): “-”.
Frequency measurement (Hz)
Range Resolution Accuracy Measurement source
60HZ 0.01Hz
±
(0.5%rdg + 1d)
Voltage U1 > 80V
•
Measurable input range : > 30V
Three Phase Sequence Detection
Input voltage range Normal phase indication Reverse phase indication Meas. source
3P > 30V U1, U2 and U3
Active Power Energy measurement (KWh)
Range Resolution
Active power
accuracy
Timer interval Timer Accuracy
3.999KWh 0.001KWh
± (1.5%rdg + 20d) 1 sec
± 50ppm at 77
o
F
(25
o
C)
39.99KWh 0.01KWh
399.9KWh 0.1KWh
3.999MWh 0.001MWh
39.99MWh 0.01MWh
119.3MWh 0.1MWh
•
Measurement display: Displays total active power consumption
Apparent Power Energy measurement (KVAh)
Range Resolution
Apparent power
accuracy
Timer interval Timer Accuracy
3.999KVAh 0.001KVAh
± (1.5%rdg + 20d) 1 sec
± 50ppm at 77
o
F
(25
o
C)
39.99KVAh 0.01KVAh
399.9KVAh 0.1KVAh
3.999MVAh 0.001MVAh
39.99MVAh 0.01MVAh
119.3MVAh 0.1MVAh
•
Measurement display: Displays total apparent power energy (sum of absolute values).