Keysight U3606B, Service Manual

Page: 58 / 123

1 Calibration Procedures
58 Keysight U3606B Service Guide
CC source effect (line regulation)
This test measures the change in output current that results from a change in the
AC line voltage from the minimum value to the maximum value.
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 Connect the AC power line through an AC voltage source. Adjust the AC
voltage source to provide nominal input voltage to the instrument.
3 Turn on the instrument. Press [Current] to select the constant current mode.
Ensure that the appropriate range is selected.
4 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 range) and voltage to full scale. Enable the output.
5 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.
Table 1-19 Constant current load regulation (load effect) verification test
Output current Range (parameter) Error from nominal 1-year
1 A S1 (1 A) ±0.0006 A
3 A S2 (3 A) ±0.0012 A
0.1 A S1m (100 mA) ±0.00006 A