AEMC 8335 User Manual page 106

Hysteresis: difference in amplitude between threshold incoming and outgoing
values.
Peak: maximum (+) or minimum (-) peak value of the signal.
Phase: temporal relationship between current and voltage in alternating current
circuits.
PST: (Short term perception). Calculation of flicker over a ten minute cycle.
PLT: (Long term perception). Calculation of flicker over a two-hour cycle.
Harmonics level whole number equal to the relationship between the frequency
of the harmonic and the fundamental frequency.
RMS: Root Mean Square. Efficient value of a current or voltage.
Dip threshold: specific voltage value to detect the start and end of a voltage dip.
Temporary surge at industrial frequency: temporary increase in the voltage
amplitude at a point in the electrical power network above a given threshold.
Nominal voltage: voltage by which a network is named or identified.
THD: Total Harmonic Distortion. The rate of total harmonic distortion gives the
influence of harmonic components in a signal.
Measurement method: all measurement methods associated to an individual
measurement.
Phase and route: a measurement route corresponds to a difference in potential
between two conductors. A phase is a simple conductor. In polyphased systems, a
measurement route can be between two phases or a phase and neutral or a phase
and earth or neutral and earth.
Watt: unit of measurement for power (W symbol).
104
Power Quality Analyzer Model 8335