ESAB LTR 160, Руководство по обслуживанию

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When fitting the new generator to older machines: three new mounting holes for the
generator must be drilled and the cable shoes must be removed from the connection
cables. Fit the generator with the connection terminal turned towards the base plate.
7 Gas valve
Gas valve YV1 is controlled by relay RE2. Potentiometer RP01, on the front panel
of the machine, is used for adjusting the gas post--flow time in the range 5--20
seconds.
Potentiometer R30, on the circuit board, controls the gas pre--flow time between 0
and 5 seconds. When delivered, it is set at 0 seconds.
The gas valve is activated briefly when the machine is energised.
8a Shunt input
Shunt input for the LTR 160 with serial number 704--xxx--xxxx and 726--xxx--xxxx and
for the LTR 200 with serial number 722--xxx--xxxx up to 842--901--0271
LTR 160: The shunt provides a signal of 137 mV at a welding current of 160A.
LTR 200: The shunt provides a signal of 137 mV at a welding current of 200A.
The cables (B1 and B2) between the shunt and the circuit board must be twisted in
order to prevent any interference reaching the circuit board.
Do not mix up cables B1 and B2, it will cause over current which destroys the
output transistors.