PSM1700 PsimetriQ user manual
13-3
harmonic Watts = VH
real
x AH
real
+ VH
quad
x AH
quad
fundamental VA = V
fund
x A
fund
fund power factor = W
fund
/ VA
fund
In power meter mode, the UP and DOWN key do not
adjust the amplitude but step the harmonic number.
The measurements are computed over rectangular
windows with no gaps. The processing power of the DSP
allows the measurements to be made in real time without
missing any samples. In this way, the measured power is
a true value even if the signal is fluctuating. The only
occasion when data is missed is when an autozero
measurement is requested – this can be disabled in the
SYTEM OPTIONS menu.
The high linearity of PsimetriQ allows real-time
measurements be made on waveforms with periodic bursts
such as low standby power PSUs. Use “autorange up” to
find the range.
PsimetriQ blanks the results when either of the measured
rms signals are low compared to the full scale range. This
function can be disabled if desired in the SYSTEM menu.
The ZOOM function can be used to select any combination
of up to four parameters from the display.
The integrator is started, or reset, by pressing the START
key. The Watt hour integration and the Ampere hour
integration can be selected to be signed or magnitude. To
integrate the total power in terms of heating effect, choose
magnitude. If signed integration is selected then the rms
current is given the sign of the power before integration.
The Ampere hours and Watt hours then reflect the power
taken by the load, less any power generated by the load,
such as during regenerative braking in battery systems.
To Next Page
Loading...
Need help?
General
