Model 2231A Triple-channel DC Power Supply Reference Manual      Section 3: General operation 
077100401/September 2014  3-3 
 
Indicator description 
Item  Description 
CC 
Constant current mode.  
Constant voltage mode.  
The power supply is in remote control mode. 
Series 
The outputs of Channel 1 and channel 2 are wired in series. 
Para 
The outputs of Channel 1 and channel 2 are wired in parallel. 
T 
Channel 1 and channel 2 are in tracking mode. 
Basic settings    
Set the voltage output or voltage limit for a specific channel 
You may set the voltage limit from 0 V to the maximum voltage rating shown on the instrument 
nameplate. To set the voltage limit, do the following: 
1.  The position of the cursor determines which channel will be adjusted. If the cursor is not located 
on the correct channel, select the correct channel by pushing the appropriate channel select 
button. 
2.  Push V-set. 
3.  Use the numeric buttons and push Enter to set the voltage limit. You can also use the up, down, 
right and left arrow buttons. 
Set the current output or current limit for a specific channel 
You may set the current limit from 0 A to the maximum current value of each model. The maximum 
current rating is shown on the instrument nameplate. To set the current limit, do the following: 
1.  The position of the cursor determines which channel will be adjusted. If the cursor is not located 
in the correct channel, select the correct channel by pushing the appropriate channel select 
button. 
2.  Push I-set. 
3.  Use the numeric buttons and push Enter to set the current limit. You can also use the up, down, 
right and left arrow buttons. 
Save and recall the setups 
You can store up to 30 different setups in memory locations. Each setup includes a voltage limit, 
current limit and maximum output voltage. 
To save the setups: 
1.  After you set up the power supply, push the Save button. 
2.  Use the number buttons or the arrow buttons to select the setup memory (1 to 30) that you want 
to store the values in. 
3.  Push Enter to confirm the memory location. 
To recall the setups: 
1.  Push Recall.