BK Precision 8500B Series - 4.4 Local;Remote Sense Configuration

Getting Started 27
4.4 Local/Remote Sense
The electronic load is capable of sensing voltage locally or remotely. If the load wiring is relatively short
and the load regulation is not critical, local sense conguration is good enough. On the other hand, if
the load wiring is relatively long, conguring to remote sense will compensate for the voltage drop of the
long load leads. Below are gures for local and remote sense congurations.
Remote sensing is used to counteract the eect of lead resistance. For example, if you connect a power
supply to the DC Load, the voltage at the power supply’s terminals will not be the same as the voltage
at the DC Load’s terminals if there is a current owing because of the nite resistance from the wires.
Using remote sensing, you can sense the voltage at the power supply’s terminals, eectively removing
the eect of the voltage drop in the connection wire.
For local remote sense connect the “+” and “-” terminals at the rear of the unit to the power source.
To reduce interference, twist the sense lines together and run together with the
wires connecting the load to the source.
When using remote sensing, the power displayed by the instrument includes both
the power dissipated inside the instrument and the power dissipated in the leads
from the power supply to the DC Load’s input terminals.
To congure the local or remote sense:
Step 1. Press + to enter the conguration menu.
Step 2. Use the arrow keys to navigate to the “SENSE” menu item. Press to enter the menu.
Step 3. Use the arrow keys to select the desired value “ON, or OFF” and press to conrm the setting.
Step 4. When active, the “Sense” indicator will show on the display.
To prevent oscillation or noise interference, it is recommended to twist the remote
sense + and – leads.