7 Troubleshooting Guide
Below there 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 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 (I-SET). Therefore, it is dependent on the
load. For example, if I-SET is configured as 1 A, the load must draw 1 A before the supply
will go into CC mode.
Q: Why is my display voltage 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 Limit
Voltage Protection (LVP) section to verify and configure the limits.
Remote Control
Q: I am trying to send the commands over RS232 using the TTL to USB serial adapter IT-
E132B, but the power supply 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, check that the baud rate, parity, data bits, stop bit, and flow control settings
match with the settings configured on the software interface.
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