5 Verification and Performance Tests
Performance Verification Tests
158 U3606A User’s and Service Guide
CV load effect (load regulation)
This test measures the change in the output voltage resulting from a
change in the output current from full load to no load or vice versa.
1 Turn off the instrument and connect a digital multimeter between the
front panel (red) and (black) output terminals (see Figure 5- 6 on
page 144).
2 Turn on the instrument. Press Voltage to select the constant voltage
mode. Ensure that the S1 (30 V/1 A) range is selected (the S1
annunciator is illuminated). Press Shift > Range again if it is not.
3 Set the output voltage to the full rated value (30 V for S1 range) and
current to full scale.
4 Connect an additional electronic load across the front panel (red)
and (black) output terminals in parallel with a digital multimeter
(see Figure 5- 6 on page 144).
5 Operate the electronic load in constant resistance mode, and set its
resistance to 30 Ω . Ensure that the U3606A is operating within the
specified limit and protection values. If not, adjust the electronic load
by increasing the resistance so that the current drops slightly until the
U3606A is operating within the specified limit and protection values.
6 Output the full rated value in the order shown below. Record the output
voltage reading on the digital multimeter.
7 Within a few seconds after step 6, operate the electronic load in open
mode. Record the output voltage reading on the digital multimeter.
8 Compare the difference between the measurement results to the
appropriate test limits shown in Table 5- 10.
Table 5 - 10 Constant voltage load effect verification test
Output voltage Range Error from nominal 1 year
30 V with 30 Ω load 30 V ±0.009 V
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