B&K 1786B User Manual

 

9

 
 
 

The following procedures check to ensure that the power supply develops its rated outputs and properly 
responds to operation from the front panel. 

The following steps verify basic voltage functions without load. 
1. Turn on the power supply. 
 
2. Enable the outputs. 
Press         key to let the 

ON 

annunciator and the 

CV 

annunciator turn on to light.   

Notice: if the voltage value flash, then the power supply is in Set mode, ‘‘Set mode’’ means that the VFD 
display shows the setting output voltage and current. Or the power supply is in Meter mode, ‘Meter 
mode” means that the VFD display shows the actual output voltage and current. 
 
3. Check that the front-panel voltmeter properly responds to number keys 
Set some different voltage values, then wait till the Meter mode to check if the VFD displayed voltage 
value is the same as the set voltage value, and to check if the VFD displayed current value is nearly 
zero. 
 
4. Ensure that the voltage can be adjusted from zero to the full rated value. 
 

The following steps check basic current functions with a short across the power supply’s output.

 

1. Turn on the power supply. 
 
2. Disable the output 
Press           key to ensure that the output is disabled. The 

ON 

annunciator is turned off. 

 
3. Connect a short across (+) and (-) output terminals with an insulated test lead. 
Use a wire size sufficient to handle the maximum current. 
 
 
 
 
 
 
 
 
4. Enable the output. 
  Press          key to ensure that the output is enabled. The 

ON 

annunciator is turned on. 

 
5. Adjust the voltage value to 1.0 volt. 

Adjust the voltage to 1.0 volt to ensure the power supply is in CC operation mode. The 

CC 

annunciator 

will turn on.   
 

6. Adjust the current value. 
    Set some different voltage values, then wait till the Meter mode to check if the VFD displayed current 

value is the same as the set voltage value, and to check if the VFD displayed voltage value is nearly