ESAB LAW 510 Service Manual page 22

7a
ARC VOLTAGE
Applies to machines with serial numbers of 434 . . . . . . .
Inputs D7 and D8 measure the voltage between the positive and negative (- - B)
welding current terminals.
The arc voltage is used with two different time constants :
A time constant of 0.5 s for voltage indication on the digital display.
S
A time constant of 1 ms for detection of cessation of short- - circuiting.
S
Circuit board connector D4
This signal is not used.
claw0de1
Circuit board AP1 486 220- -880
- - 22 - -
claw0e13