39
Fig.3
Potentiometer for setting the maximum welding amperage
(1)
(2)
- Shift the mains switch to the “O”
position and unplug the machine from
the mains
- Connect the shunt and power resistor
to the welding sockets of the power
source
- Set the welding-current dial to
Minimum
- Plug the machine back into the mains
and shift the mains switch to the “I”
position
- Select the welding process “rod-
electrode welding“
- Measure the min. welding current
using the shunt and power resistor
- I
min
= 10 A
- Tolerance range = +/-1 A
Checking the
minimum
welding
amperage
Fig.4
Checking the minimum welding amperage
+
-
Load resistor
load: 4 Ohm / P > 400 W
S
h
u
n
t
V/Amp.-
meter
TP 1500
If I
min
is not within the tolerance range, this may mean that the LCA15 board or the
potentiometer are faulty
-
or that I
min
is not set correctly.
If the minimum welding current (I
min
) is too high or too low, set the minimum welding
current.
- Open the housing (see the section headed: “Opening the housing”)
- Plug the machine into the mains and shift the mains switch to the “I” position
- Select the welding process “rod-electrode welding“
- Measure the max. welding current using the shunt and power resistor
- Adjust the potentiometer (1) - Fig.3 - on the LCA15 board, until the exact value for
the maximum welding current (140 A) is reached
- I
max
= 140 A
Setting the
maximum
welding
amperage
(continued)
Содержание TP 1500
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