Configuring Measurement Parameters - Arbiter Systems Portable Power Sentinel 933A Operation Manual

Rate (R) times the number of cycles (or Window Length, W). Cycles
Used = R W. For example in the screen shot from Figure 6.5, this value
is 20 10 = 200. Maximum values for Cycles Used are 1440 for 60 Hz
and 1200 for 50 Hz.
Data Format allows you to set up the computation resolution and speed
of which the 1133A processor can send data
Nominal Frequency is either 50 Hz or 60 Hz, nominal.
Adaptive Tuning is used to help eliminate the possibility of losing the
signal due to filter rolloff effects by continuously adjusting the receiver
center frequency. Adaptive tuning is disabled if the error exceeds the
limit. Set to 2, 5 or 10 Hz.
Estimator Algorithm The 933A offers a wide range of window functions.
All window functions serve the same purpose (as a low-pass filter) and
work in the same manner. The main difference between windows is
the magnitude of the 'sideband lobes,' which are peaks in the rejec-
tion band. Select a window function (Estimator Algorithm) based on
desired performance. Test algorithm performance using WindowFunc-
tion.exe, the free software tool available on the Arbiter web site. See
http://www.arbiter.com/software/downloads.php
Digital Channels The 933A allows you to select any of the 32 available
User (DSP) trigger records to accompany the regular phasor data. Select
to report in either the normal or triggered state.
6.2.6 Configuring Measurement Parameters
Configure several measurement options by selecting Connection > Config-
ure > Measurement Parameters or by clicking the Measurement Parame-
ters button. You are not able to set "Internal Calibration," and "Voltage
Linearity" from PSCSV.
DSP Mode
DSP Mode includes setting the system frequency, input configuration,
voltage range, current range, current auto range, and enabling Anticreep
as seen in Figure 6.6.
CTPT Ratios and Constants
CTPT includes setting CT and PT nominal ratios, and twelve points for
magnitude and phase error, and the calibration point for each.
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