User Manual

6 Troubleshooting Guide
Below are some frequently asked questions and answers. Please check if any apply to your
power supply before contacting B&K Precision.
6.1 General
Q: I cannot power up the power supply.
Check that the power cord is securely connected to the AC input and there is live power from your
electrical AC outlet.
Verify that the AC power coming from the mains contains the correct voltage. The power supply
can accept a specific range of AC input voltages. Refer to section 2.1.
Q: How do I set up the supply to run in constant current mode?
The supply is a CV/CC power supply that automatically crosses over from CV to CC upon a load
which draws current at the current limit (ISET). Therefore, it is dependent on the load. For
example, if ISET is configured as 1 A, the load must draw 1 A before the supply will go into CC
mode.
Q: How come my display voltage is lower than the voltage I set?
This is often because of the resistances from the test leads/wires connected between the supply
and the DUT (device under test), which causes a drop in voltage. To minimize this drop, use
remote sense terminals to compensate and output a more accurate voltage to the DUT.
Q: I cannot set voltage at the maximum rating.
This may be that the set voltage is outside of the voltage maximum limit. Refer to section 3.6
under “Output Limit Settings” to verify and configure the limits.
Remote Control
Q: I am trying to send the commands over USB/RS232, but it does not seem to respond.
Check that you are sending ASCII strings that are terminated with a CR (carriage return) and LF
(linefeed) character.
For RS232 and RS485, check that the baud rate, parity, data bits, stop bit, and flow control
settings match with the settings configured on the software interface.
For RS485, check that the wires are correctly daisy chained between multiple units.
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