Verification and Performance Tests 5
Performance Verification Tests
U3606A User’s and Service Guide 165
6 Operate the electronic load in constant resistance mode, and set its
resistance to 2.5 Ω . Ensure that the U3606A is operating within the
specified limit and protection values. If not, adjust the electronic load
by reducing the resistance so that the voltage drops slightly until the
U3606A is operating within the specified limit and protection values.
7 Adjust the AC voltage source to the low line voltage limit. Divide the
voltage drop (reading on the digital multimeter) across the current
monitoring resistor by its resistance. Record the output current reading
on the digital multimeter.
8 Within a few seconds after step 7, adjust the AC voltage source to the
high line voltage limit. Record the output current reading on the digital
multimeter.
9 Compare the difference between the measurement results to the
appropriate test limits shown in Table 5- 14.
CC noise effect
This test measures the RMS output current in the frequency range from
20 Hz to 1 MHz.
1 Turn off the instrument and connect a 2.5 Ω fix resistive load between
the front panel (red) and (black) output terminals (see
Figure 5- 11 on page 146).
2 Connect an AC/DC converter to the fix resistive load and a 50 Ω
feed- thru termination to the AC/DC converter. Connect a differential
amplifier to the 50 Ω feed- thru termination (see Figure 5- 11 on
page 146).
3 Connect another 50 Ω feed- thru termination to the differential amplifier
output and an RMS voltmeter to the 50 Ω feed- thru termination (see
Figure 5- 11 on page 146).
Table 5 - 14 Constant current source effect verification test
Input AC line
Low line
current limit
High line
current limit
Error from
nominal 1 year
100 90 V
ac
110 V
ac
±0.0015 A
115 104 V
ac
127 V
ac
±0.0015 A
230 207 V
ac
253 V
ac
±0.0015 A
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