5
Operating and display elements
Page 28
Stud welding unit
operating manual
Date:
July 2021
ALPHA 850
07.2021 / EN
Rev.:
A
5
Control and display elements
All control and display elements of the ALPHA 850 welding device are on the upper
front plate and marked with graphic symbols.
3
7
8
9
1
2
4
5
6
1
Power switch
6
LED for gun coil circuit
2
Weld current potentiometer
7
Malfunction LED
3
Weld time potentiometer
8
Contact LED
4
System voltage LED
9
Operating mode selector switch
5
Start weld cycle LED
5.1 Operating elements
Power switch
Function: Turning the ALPHA 850 on and off.
Switch position: I = ON;
O = OFF
When the welding device is turned on, the system voltage
LED goes on. The network phases are monitored with the
fault LED.
