Keysight 669 A Series, Service Manual

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Verification 11
Programming Parameters
Table 2-2 lists the programming voltage and current values for each model. You can enter these values either from the front
panel or from a controller over the GPIB.
Table 2-2. Programming Voltage and Current Values
Keysight Model Full Scale Max. Prog. Full Scale Max. Prog. Max. Prog.
Voltage Voltage Current Current Overvoltage
Keysight
6690A
15V 15.375V 440A 450A 18V
Keysight
6691A 30V 30.75V 220A 225A 36V
Keysight 6692A 60V 61.5V 110A 112A 69V
General Measurement Techniques
Figure 2-1 shows the setup for the Constant Voltage tests. Measure the dc output voltage directly at the sense (+S and -S)
terminals. Connect these terminals for local sensing. Be certain to use load leads of sufficient wire gauge to carry the output
current (see Chapter 4 of the Power Supply Operating Manual). To avoid noise pickup, use coaxial cable or shielded pairs
for the test leads. If you use more than one meter or a meter and an oscilloscope, connect separate leads for each instrument
to avoid mutual-coupling effects.
Performance Test Record Sheets
When performing the tests in this chapter, refer to the Performance Test Record sheets supplied at the end of this chapter.
Table 2-6 is for recording common information, such as, the test equipment used and the environmental conditions. Tables
2-7 through 2-11 are dedicated to specific models. Each sheet lists the acceptable test ranges for the model and provides a
place to record the results of the test.
Note
It is recommended that before you perform the tests in either Table 2-4 or Table 2-5, that you first locate
the appropriate Performance Test Record sheet from Tables 2-7 through Table 2-11 for your specific
model. Make a copy of this sheet, and record the actual observed values in it while performing the tests.
Use the sheets in Tables 2-7 through Table 2-11 as master reference sheets to run copies at any time.
Operation Verification Tests
Table 2-3 lists the requirements for operation verification, which is a subset of the performance tests.
Table 2-3. Operation Verification Tests
Test Refer To
1 Turn-On Checkout Power Supply Operating Manual
2 Voltage Programming and Readback Accuracy Table 2-4
3 Current Programming and Readback Accuracy Table 2-5
Note: Record the results of Tests 2 and 3 in the appropriate Performance Test Record sheets
Performance Tests
Performance tests check all the specifications of the power supply. The tests are grouped into constant-voltage mode tests
(Table 2-4) and constant-current mode tests (Table 2-5).