SPS5000X series service manual
Verify power regulation rate
(
1
)
Constant voltage mode
Test Overview: The input voltage regulation rate is also called the line regulation
rate, that is, the change of the input voltage will cause the output voltage to
fluctuate. Under the input voltage changes across the full input range, test the
voltage that the output voltage deviates from the setting voltage. This test
verifies the power regulation of the power supply in constant voltage mode.
Preset conditions: room temperature
Test instrument: adjustable transformer, multimeter, electronic load
Test methods and steps:
(a) Take SPS5081X as an example : The input of the SPS5081X is powered
by a variable transformer, the output terminal connect to the electronic load,
and the multimeter meter pen connect to the positive and negative terminals
of the power output terminal.
(b) Turn on the power of each device, set the output to 100VAC of the
transformer. The SPS5081X works in constant voltage mode after power-on,
the electronic load set to constant current mode, and the multimeter set to
DCV gear.
(c) The output of SPS5081X set to 5V/15A. At this time, the electronic load is
set to 14.96A, and record the reading value of the multimeter.
(d) SPS5081X set to 5V/15A, 12V/15A, 24V/15A, 36V/10A, 48V/7.5A,
60V/6A, 80V/4.5A, the electronic load set 40mA below SPS5081X, and record
the reading value of the multimeter in each case.
(e) Then set the outputs of the adjustable transformers to 110VAC, 120VAC,
200VAC, 220VAC, 230VAC, 240VAC, repeat steps (c) and (d).
(f) Take the maximum value in the result to determine whether the SPS5081X
has reached the predetermined specification.
Table 2-2
Model
SPS5081X
Vo
Vin
5V
12V
24V
36V
48V
60V
80V
regulation
rate
100V
110V
120V
200V
220V