-5 5 kV Power Supply User's Manual Section 8:
2290-5-900-01 Rev. A/December 2013 8-3
DC voltage accuracy
Use the following steps to measure the accuracy of the DC output voltage.
1. With the power off, connect the Model 2290-5 HIGH VOLTAGE output connector to the high
voltage divider, and connect the multimeter to the 1V output tap of the divider (see next figure).
Turn off high voltage and allow ample time for the voltage to discharge before changing any
connections. Also, make sure that you connect the divider chassis to safety earth ground
using #18 AWG or larger wire.
Figure 17: Model 2290-5 Connections for DC voltage accuracy tests
2. Turn on the power, and set the Model 2290-5 to its default conditions. (Press RCL, 0, and then
ENTER.)
3. Select the multimeter DCV function, and enable autoranging.
4. With the high voltage turned off, allow the multimeter reading to settle to 0V, and then enable the
REL mode to null any residual offset voltage.
5. Turn on the Model 2290-5 high-voltage output. Set the Model 2290-5 output voltage to each value
as indicated in the DC voltage accuracy summary table, and verify that the reading parameters
are within stated limits. For each setting:
• Set the output voltage as indicated in the table.
• Wait at least 10 seconds for the output to settle.
• Make sure that the Model 2290-5 VOLTS display reading is within stated limits.
• Verify that the multimeter reading is within required limits.
6. Turn off the high voltage, and allow the voltage to discharge.
7. Repeat the procedure with Filter 1 enabled for voltages up to 3000V. Be sure to test both with
positive and negative output polarity.
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