Calibration Procedures 1
Keysight U3606B Service Guide 57
CC load effect (load regulation)
This test measures the change in the output current resulting from a change in the
load from a full rated output voltage to a short circuit.
1 Turn off the instrument and connect a 0.01 Ω current shunt monitoring resistor
and a digital multimeter across the current shunt monitoring resistor with an
electronic load in series between the front panel (red) and (black) output
terminals (see Figure 1-15, “Test setup for constant current load and line
regulation verification,” on page 36).
2 Turn on the instrument. Press [Current] to select the constant current mode.
Ensure that the appropriate range is selected.
3 Set the output current to the full rated value (1 A for S1 range, 3 A for S2
range, or 0.1 A for S1m) and voltage to full scale.
4 Operate the electronic load in constant voltage (CV) mode, and set its
voltage (30 V for S1 range or 8 V for S2 range).
Ensure that the U3606B 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 U3606B is the constant current (CC) mode.
For the S1m range, operate the electronic load in constant resistance mode,
and set its resistance to 300 Ω. Ensure that the U3606B 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 U3606B is
operating within the specified limit and protection values.
5 Output the full rated value in the order shown below. 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.
6 Within a few seconds after step 5, operate the electronic load in short mode.
Record the output current reading on the digital multimeter.
7 Compare the difference between the measurement results and the appropriate
test limits shown in Table 1-19.
8 Repeat step 2 to step 7 for the S2 (8 V/3 A) and S1m (100 mA /30 V) ranges.
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