SPS5000X series service manual
230V
240V
(
2
)
Constant current mode
Test Overview: When the power supply is working in constant current mode,
the change of input voltage will cause fluctuations to the output current.
Under
the input voltage changes across the full input range, test the current that output
current deviates from the setting current.
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, turn on the power of each device, the electronic
load set to constant voltage mode, the multimeter set to the DCI gear, and
the multimeter pen connect to the electronic load in series.
(b)Set the output to 100VAC of the transformer, the output of SPS5081X set
to 2A/80V, the electronic load set to 79.96V, the SPS5081X works in constant
current mode after power-on, and record the reading value of the multimeter.
(c) SPS5081X set to 2A/80V, 6A/60V, 9A/40V, 12A/30V, 15A/24V, and record
the reading value of the multimeter in each case.
(d) Then set the outputs of the adjustable transformers to 110VAC, 120VAC,
200V, 220V, 230V, 240V, repeat steps (b) and (c).
(e) Take the maximum value in the result to determine whether the SPS5081X
has reached the predetermined specification.
Table 2-3
Model SPS5081X
Vo
Vin
2A
6A
9A
12A
15A
regulation
rate
100V
110V
120V
200V
220V
230V
240V