SECTION 5
REMOTE OPERATION
104
5.7.7 EXAMPLES OF VOLTAGE and CURRENT WAVEFORM QUERY
This is an example of how to query the UPC for metered waveform values for phase A voltage and
current.
Step A. Address the UPC as a listener.
Step B. Select Voltage A and Load Current A for waveform query by
sending the following command.
:FETCh:VOLTage1?
<eos>
:FETCH:CURRent1?
<eos>
NOTE:
<eos> is a LINE FEED (0Ahex, 10dec).
NOTE:
To obtain waveform data corresponding with the values
retrieved by a :MEASure query, this command should immediately
follow the :MEASure query in one Program Message (example shown
below).
NOTE:
All parameters will be measured simultaneously upon receipt
of the :FETCH query. This may take several hundred milliseconds
depending upon Frequency and other factors. The values are not
stored in the UPC and another :FETCH? command will re-measure the
values.
Step C. Address the UPC as a talker.
The UPC returns a string representing the last metered waveform
data. Each waveform consists of a string of NR2 type numbers
separated by commas. The number of data points returned in each
waveform is equal to the number of metering samples, as determined
by the FREQUENCY SPAN 2.1.1.
Step D. Un-address UPC.
An example command (substitute for step B above) for obtaining simultaneous RMS voltage and current
values and waveforms for PHASE A is as follows.
:MEASure:VOLTage1?;:FETCh:VOLTage1?
<eos>
:MEASure:CURRent1?;:FETCh:CURRent1?
<eos>
Summary of Contents for UPC-3
Page 2: ......
Page 12: ...SECTION 1 GENERAL viii THIS PAGE INTENTIONALLY BLANK ...
Page 17: ...SECTION 1 GENERAL 5 PACIFIC Figure 1 3a SCU UPC 3 Figure 1 3b UPC 3 Figure 1 3c UPC 1 ...
Page 43: ...SECTION 4 OPERATION 31 PA CIFIC FIGURE 4 1 POWER SOURCE FRONT PANEL ...
Page 74: ...SECTION 4 OPERATION 62 90 0 100 0 85 95 100 90 FIGURE 4 6 2 1 EDITED WAVEFORM ...
Page 134: ...NOTES 122 NOTES ...
