Keysight U3606B - Page 59

Calibration Procedures 1
Keysight U3606B Service Guide 59
6 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.
7 Within a few seconds after step 6, adjust the AC voltage source to the high line
voltage limit. Record the output current reading on the digital multimeter.
8 Compare the difference between the measurement results and the appropriate
test limits shown in Table 1-20.
9 Repeat step 3 to step 8 for the S2 (8 V/3 A) and S1m (100 mA/30 V) ranges.
CC noise effect
This test measures the RMS output current in the frequency range from 20 Hz to
20 MHz with the U3606B operating in the constant current (CC) mode.
1 Turn off the instrument and connect a fixed resistor (30 Ω for S1 range, 2.67 Ω
for S2 range, or 300 Ω for S1m range) between the front panel (red) and
(black) output terminals (see Figure 1-16, “Test setup for constant current
RMS noise effect verification,” on page 37).
2 Connect an AC/DC converter to the fixed resistor and a 50 Ω feed-thru
termination to the AC/DC converter. Connect a differential amplifier to the
50 Ω feed-thru termination.
Table 1-20 Constant current source effect (line regulation) verification test
Input AC line
Low line
current limit
High line
current limit
Range
(parameter)
Error from nominal 1-year
100
90 V
ac
110 V
ac
S1 (1 A) ±0.0015 A
S2 (3 A) ±0.0015 A
S1m (100 mA) ±0.00015 A
115
104 V
ac
127 V
ac
S1 (1 A) ±0.0015 A
S2 (3 A) ±0.0015 A
S1m (100 mA) ±0.00015 A
230
207 V
ac
253 V
ac
S1 (1 A) ±0.0015 A
S2 (3 A) ±0.0015 A
S1m (100 mA) ±0.00015 A