Pacific Power Source UPC-32, Руководство по эксплуатации

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SECTION 8 CALIBRATION
101
8.3 EXTERNALLY REFERENCED CALIBRATION (continued)
Since the UPC display can show both PROGRAM (Command) and METERED voltages, these errors will be
apparent - if they occur - as a slight difference between the two voltages. Only basic metering inaccuracy
will not reveal itself on the display.
To calibrate the metering functions of the UPC, it will be necessary to:
1. Set up the UPC to generate output voltage and current.
2. Measure the voltages and currents on all phases using an external Voltmeter and Current Meter that
have been calibrated to a traceable standard (i.e., NBS, NIST), and are at least 2x as accurate as
the UPC metering (
2.0 ).
3. Enter the measured values into the UPC via the keyboard or Remote Interface.
The UPC then creates calibration factors (kFactors,) for the metering functions and stores them in RAM.
The kFactors can be viewed on the display by pressing
fn , 4 , 3, ( 8.3.1 ), or through the control bus ( 5.6 ),
:CALibrate:KFACTORS ).
Typically, calibration is performed with output settings of 60 Hz and 120 volts. Because of the precision and
stability of the system, the calibration factors are the same for all other values of volts and frequency. For
convenience, or if maximum precision at a particular setting is needed, the system may be calibrated at any
frequency, voltage and current desired. Calibration of current metering is based on the Load Current set by
the user. Therefore a nominal Load Current should be chosen for this calibration process.
NOTE: Only RMS voltages and currents are corrected.
NOTE: If the Programmable Impedance Option is installed, it must also be calibrated ( 4.6.3.1.1 ) or ( 5.4.1 ),
:[SOURce]:IMPEDance:CAL.
WARNING
OBSERVE THE FOLLOWING WHEN CALIBRATION IS REQUIRED:
1) REMOVE ALL JEWELRY FROM ARMS AND NECK WHEN CALIBRATING EQUIPMENT.
THIS PREVENTS THE POSSIBILITY OF SHORT CIRCUIT THROUGH THE JEWELRY,
CAUSING BURNS TO, OR ELECTROCUTION OF, THE OPERATOR.
2) WEAR SAFETY GLASSES TO PREVENT EYE INJURY DUE TO FLYING
PARTICLESCAUSED BY ACCIDENTAL SHORT CIRCUIT CONDITIONS.