Page 6 - Voltech Instruments PM3300 Universal Power Analyser, designed and produced by Connell Marketing Associated, UK

Basic Measurements

CH1

Watts = +708 . 4 W
Volts = 107 . 18 V
Amps = 8 . 851 A

VA = 948 . 6 VA
VArs = 631 . 0 VAr
> PF = 0 . 746

REAL POWER.
W Measures true power and the direction of power flow. Accurate even

with very low power factors and distorted waveforms.

VA APPARENT POWER.

Determines the apparent power absorbed by load.

REACTIVE VOLT-AMPERES.

VAr Displays the reactive power flow caused by phase displacement or

distortion.

VOLTAGE.
V Displays the true rms value of the system voltage. Can also display the

rectified mean value for calibration of mean sensing instruments.

CURRENT.
A Displays the true rms value of load current. Can also display the

rectified mean value.

POWER FACTOR.
PF Determines the true power factor of the load. The PM3300 computes

the ratio W/VA thus displaying actual value of power factor for both
sinusoidal and distorted waveforms.

PEAK PEAK VOLTAGE.

Displays the repetitive peak value of the applied voltage. Useful for
determining the working voltage on insulation or voltage available for
rectification.

PEAK CURRENT.

Displays repetitive peak current. Used for setting current limit levels in
UPS and other power electronic applications.

VOLTAGE CREST FACTOR.
CF Displays the ratio of Vpk/Vrms. For a pure sinewave Vcf=1.414. A non-

linear load will cause distortion of the voltage waveform, reducing Vcf.
This provides a useful indication of the effect of the load on the ac
supply.

CURRENT CREST FACTOR.

Displays the ratio Apk/Arms. Loads producing a distorted current can
result in high values of Acf.

IMPED IMPEDANCE.
-ANCE
Determines the impedance of the load, expressed in ohms. Will also
show the real and imaginary parts of load impedance.

INRUSH PEAK INRUSH CURRENT.
A
The PM3300 will display the peak current that flows when switching on
loads such as power supplies or motors.

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