User Manual
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1. Press + to enter the conguration menu.
2. Use the arrow keys to navigate to the “SENSE” menu item. Press to enter the menu.
3. Use the arrow keys to select the desired value “ON, or OFF” and press to conrm the setting.
4. When active, the “Sense” indicator will show on the display.
5.2 External Triggering
An external trigger is a TTL low signal applied to the Trigger connection on the back panel. This TTL signal must last
for more than 5 ms. A trigger applied to this input can be used to change settings (voltage, current ,resistance), toggle
between settings in transient-toggle mode, or generate a pulse in pulse mode.
1. Press + .
2. Use the arrow keys or the knob to navigate to the “TRIGGER” menu item.
3. Select “EXTERNAL” and press to conrm the setting.
5.3 Current Monitoring (I Monitor)
The current monitor output, the bnc connector, outputs a scaled voltage relative to the current owing. The relationship
is 𝑉
𝑜𝑢𝑡
= 10𝑉 ∗
𝑐𝑢𝑟𝑟
𝑚𝑎𝑥
. For example, the 8542B maximum current is 30 A. When a current of 1 A is owing, the current
monitor output will be 10𝑉 ∗
1
30
= 333𝑚𝑉.
Note: The output accuracy is approximate. Verify the scaling relationship for each unit.
5.3.1 Remote Sensing
Remote sensing is used to counteract the eect 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, eectively removing the eect of the voltage drop in the connection wire.
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.
Steps to enable remote sensing in the menu:
1. Press [ ] + [9] key into the menu
2. VFD displays > , press [Enter] key to conrm
3. Press [(right/left)] to choose >, press [Enter] key to conrm
4. Press [(right/left)] to choose >, press [Enter] key to conrm, then remote sense function has been set, and VFD
display indicator.
Remote Sensing: SENSE (+) and SENSE (–) are the remote sensing inputs. By eliminating the eect of the inevitable
voltage drop in the DC load leads, remote sensing provides greater accuracy by allowing the DC load to regulate directly
at the source’s output terminals.
Wiring Diagram for Remote Sensing:
5.3.2 Current Monitoring (I Monitor)
Current monitoring terminal will output 0-10V analog signal to corresponding to 0 to full range of input current. You
can connect an external voltmeter or an oscilloscope to display the input current’s changing