Calculation Of The Power Factor; Frequency Measurements - AEMC 405 User Manual

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4.2.18 Calculation of the Power Factor

Measurement Range (1)
Specified Measurement
Range
Accuracy
Resolution
Note (1) If one of the terms in the calculation of the power factor is displayed
as "OL", or forced to zero, the display of the power factor is an
indeterminate value "----".
Note (2) The power factor is given a sign that indicates whether the load is
inductive (sign "+") or capacitive (sign "-"). This sign is not determined
by that of the active power, but by the phase lead or lag between the
U and I signals.
Note (3) - Sign of the power factor according to the four-quadrant rule (§4.2.12):
Quadrant 1: Power factor PF
Cos Φ
Quadrant 2: Power factor PF
Cos Φ
Quadrant 3: Power factor PF
Cos Φ
Quadrant 4: Power factor PF
Cos phi
Specific characteristics in MAX/MIN mode (from 10Hz to 1kHz):

Accuracy: add 1% R to the values in the table above.

Capture time: approximately 100ms.

4.2.19 Frequency Measurements

4.2.19.1 Voltage
Measurement
Range (1)
Specified
1 to 100% of the
Measurement
measurement range
Range
Accuracy
Resolution
4.2.19.2 Current
Measurement Range (1)
Specified Measurement Range
Accuracy
Resolution
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-1.00 to +1.00 (2)
0 to 50% of the
measurement range
± (6% R +3cts)
0.01
sign + (inductive system)
sign +
sign - (inductive system)
sign -
sign + (inductive system)
sign -
sign - (inductive system)
sign +
5.0 to 1000 to
999.9Hz 9999Hz
0 to 100% of the
measurement range
± (0.4% R +1ct)
0.1Hz 1Hz
5.0 to 1999Hz
1 to 100% of the measurement range
± (0.4% R +1ct)
0.1Hz
44
50 to 100% of the
measurement range
± (3% R +3cts)
10.00 to
19.99kHz
10Hz
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