Service manual

Verification 15
Table 2-4. Constant Voltage (CV) Tests (continued)
Action Normal Result
Transient Recovery (cont)
3 Program the Electronic Load as follows:
• Operating mode to constant current.
• Input load current to 1/2 the supply's full rated output current.
• Transient current level to the supply's full rated output current.
• Transient generator frequency = 100Hz.
• Transient generator duty cycle = 50%.
4 Turn on the transient and adjust the oscilloscope to display response
waveform.
See Fig. 2-2.
5 Measure both the loading and unloading transients by triggering the
oscilloscope on both the negative and positive slopes of the transient.
Record the voltage level obtained at the 900-µs interval .
Specified voltage level is reached within
900µs.
Figure 2-2. Transient Response Waveform
Constant Current (CC) Tests
Test Setup
Connect the appropriate current monitoring resistor (see Table 2-l) as shown in Figure 2-3. The accuracy of the resistor
must be as specified in the table.
Test Procedures
The test procedures are given in Table 2-5. The tests are independent and may be performed in any order. The CC tests are:
• Current Programming and Readback Accuracy.
• CC Load Effect.
• CC Source Effect.