Preamble 
UM-22100H-U User manual ATEQ D520 Page 12/122 
7. PRESENTATION OF THE SYMBOLS 
Symbol  Name  Function 
 
Adjust leak 
connector 
Pneumatic connector for the plugging of a calibrated leak 
(ruby kind) or an adjustable leak. 
 
Pressure 
connector 
Pneumatic connector for the plugging of a manometer for an 
external checking of the pressure. 
 
Pressure 
supply 
of the air supply from the 6 bar network. 
 
Test circuit 
supply 
Pneumatic connector (according to option) for the plugging 
of a supplementary pneumatic supply, used in case of test 
pressure greater than 8 bar. 
 
Ground 
connector 
Connector for the electric plugging to the ground. 
 
Automatic 
connector 
Pneumatic connector for the driving of an external logic or 
pneumatic components (pneumatic sealing connector). 
 
Connector  Connector for pneumatic output. 
 
Connector  Connector for pneumatic input.
  
!
 
Warning! 
Read and respect the instructions of the user manual, 
before plugging and using the instrument. 
 
Remote 
control 
Connector for a remote control. 
 
Printer  Connector for printer plugging.