Performance Verification 2
Series E4360 Service Guide
13
Measurement Techniques
Voltmeter
To ensure that the values read by the voltmeter during both the
verification procedure and the calibration procedure are not affected by
the instantaneous measurement of the AC peaks of the output current
ripple, several DC measurements should be made and averaged.
If you are using a Keysight 3458A DMM, you can set up the voltmeter to
do this automatically. From the instrument’s front panel, program 100
power line cycles per measurement.
Press NPLC 100 ENTER.
Current-Monitoring Resistor
The 4-terminal current shunt is used to eliminate output current
measurement error caused by voltage drops in the load leads and
connections. It has special current-monitoring terminals inside the load
connection terminals. Connect the voltmeter directly to these current-
monitoring terminals.
Electronic Load
Many of the test procedures require the use of a variable load capable of
dissipating the required power. If a variable resistor is used, switches
should be used to connect, disconnect, or short the load resistor. For
most tests, an electronic load can be used. The electronic load is
considerably easier to use than load resistors, but it may be too noisy for
the noise (PARD) tests.
Fixed load resistors may be used in place of a variable load, with minor
changes to the test procedures. Also, if computer controlled test setups
are used, the relatively slow (compared to computers and system
voltmeters) settling times and slew rates of the solar array simulator may
have to be taken into account. "Wait" statements can be used in the test
program if the test system is faster than the solar array simulator.
Verification Test Set-up
The following figures illustrate the test set-ups used for the verification
procedures.
Summary of Contents for E4360 Series
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