Sorensen SFA Series, Руководство по эксплуатации

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Operation Sorensen SFA Series
3.2.3
C
URRENT
M
ODE
O
PERATION
When the supply is in the Current Mode (the default mode for the SFA series),
the output current of the supply is controlled by the Current knob on the front
panel or by the remote current input (see Section 3.3). To verify operation in
current mode, follow the steps below:
1. Connect a high current DC ammeter across the rear panel positive and
negative output terminals, observing the correct polarity. Select wire
leads of sufficient current carrying capacity and an ammeter range
compatible with the units maximum rated output current. NOTE: If a
high current ammeter is not available, you may simply short the output
terminals together. This will not harm the supply.
2. Turn on the power supply.
3. Slowly rotate the Current knob clockwise and observe both the front
panel current display and the output of the ammeter. The minimum
range should be from 0A to the maximum rated current output of the
supply. The front panel display and ammeter readings should track
within the accuracies of the meter and the front panel display.
4. Note the reading on the voltage display. This is the compliance voltage
of the load at the present output current. Note the maximum
compliance voltage is set by the specific model of the supply.
5. Check that the green Current Mode indicator is on.
6. Turn the Current knob fully counterclockwise.
7. Turn the power supply off.
8. Disconnect the ammeter or short from the output terminals.
If Current mode operation did not function as indicated above, recheck your
setup and perform the check again. If the function continues to fail, contact the
factory for assistance.
3.2.4
O
VERCURRENT
P
ROTECTION
The Overcurrent Protection (OCP) function allows the supply to shutdown the
output when it exceeds a preset current. This may be used to protect sensitive
circuits or loads from damage caused by an excessive current on the output of
the supply. To verify OCP operation, follow the steps below:
1. Connect a short or an appropriate load across the output terminals.
2. Rotate the Current control knob fully counterclockwise (this sets the
current control at 0 Amps)
3. Turn on the power supply.
3-6 M550292-01 Rev C