Fronius MTG 250i Serviceanleitung Seite 83

NOTE!
While the control elements are being tested, the hosepack should be flexed and
twisted along its entire length so that any breaks in the control line can be de-
tected.
Current load All the required inspection equipment and components for measuring the volta-
test/voltage ge drop of the power/water cable can be found in the "PP-SER-2002" test sche-
drop measure- dule.
ment
NOTE!
This type of test must only be carried out on water-cooled systems.
(1)
(3)
English
Connect control line with adapter
1
cable and connect to testbox
Press the buttons on the welding
2
torch and check the function via
the test box
Electrical test
Press left rocker switch forward
a)
for a long time = LED end crater
current
b) Press left rocker switch backward
for a long time = LED main current
c) Press right rocker switch forward
for a short time = LED Down
d) Press right rocker switch backward
for a short time = LED Up
e) Press LED button = welding torch
LED lights up during actuation of
the button
The limit values can be found in
the "PP-SER-2002" test schedule.
(2)
Connect the manual torch to the
1
power source (1)
Short circuit (ground) the torch
2
body via current load test adapter
(2)
Operate the power source in "elec-
3
trode mode" according to the test
schedule. Switch off the anti-stick
function and carry out a voltage
drop measurement
Read off the DC voltage drop via
4
multimeter (3) and compare with
the test schedule values
83