AMETEK ASD Series - Manual (Page 42)

Operation Sorensen ASD Series
3-4 M551177-01 Rev A
3.3.4 CURRENT MODE OPERATION
When the supply is in the Current Mode, the output current of the supply is
controlled by the Current setpoint slider on the master controls tab on GUI
or by the remote current input (see Section 3.4). The Voltage setpoint
slider (or remote voltage input) operates as a voltage limit. 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.
2. Select wire leads of sufficient current carrying capacity and an
ammeter ran ge compatible with the unit’s 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.
3. Turn the input voltage to the power supply on.
4. Once the MODBUS control interface is connected to power supply
(See Section 4.6.1), set the Voltage and power setpoint sliders
above zero volts and zero watts (this sets the Voltage limit at a
nominal setting above 0 Volts and forces the supply into current
mode).
5. Slowly increase the Current slider and observe both the unit
readback and the output of the ammeter.
The minimum range should be from 0A to the maximum rated
current output of the supply.
The GUI unit readback and ammeter readings should track within
the accuracies of the meter and the GUI unit readbacks
6. Check that in Master controls tab and unit readbacks, the Imode
box is black.
7. Decrease the Voltage slider and Current slider fully to zero.
8. Turn the input voltage to the power supply off.
9. 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.