The tester cannot start to run a test under the 
following conditions: 
  A protection setting has been tripped; when a 
protection setting has been tripped the 
corresponding error message is displayed on 
the screen. See page 148 for a comprehensive 
list of the all the setting errors. 
  The INTERLOCK function is ON and the 
Interlock key is not inserted in the signal I/O 
port (page 76). 
  The STOP signal has been received remotely. 
If Double Action is ON, ensure the START 
button is pressed immediately after the STOP 
button (<0.5s).  
When a test is running the voltage output 
cannot be changed, unless the test is under the 
special manual mode. See page 67 for details. 
1.  Ensure the tester is in VIEW status 
for the current test. Save the 
current test if necessary.