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5 Troubleshooting Guide
Below are some frequently asked questions and answers. Please check if any apply to your
power supply before contacting B&K Precision.
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 have 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
3.3 under “Configure Voltage Limit” to verify and configure the limits.
- Verify the over voltage protection setting by pressing .
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 RS-232 and RS-485, check that the baudrate, parity, data bits, stop bit, and flow control
settings match with the settings configured on the software interface.
- For RS-485, check that the wires are correctly daisy chained between multiple units.
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