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10.7)
Functional MMA tests
Conditions
- Power source powered, MMA mode
- Electrode holder and earth lead connected
- Welding circuit not connected to protection earth potential.
Checks
- Perform various functional tests in MMA mode, making sure
the controls on the panel work, i.e.:
correct arc striking
correct maintenance of arc stability
welding even at max. power, according to data given in the
table below:
Electrode type
Diameter
Basic
Basic
Rutile
Rutile
- Repeat the above tests with earth lead connected to protec-
tion earth potential.
10.8)
Functional TIG tests
Conditions
- HF
board
inserted
15.14.285/15.14.315 and secured with relevant fasteners
- Power source on, TIG mode.
- Welding circuit not connected to protection earth potential.
Checks
- Perform various welding tests in TIG mode, making sure the
controls on the panel work, i.e.:
correct activation of solenoid valve and gas delivery
idle HF discharge in order to discover HF leakage within
central adapter
correct arc striking in TIG DC LIFT, TIG DC HF and TIG AC
modes
correct maintenance of arc stability
welding even at max. power
check various functions (2 stage, 4 stage, slope up and
down, BI-LEVEL, pulsation...)
perform welding tests in DC and AC with various current,
frequency and pulsation levels according to the contents
of the table below:
Electrode type red
Diameter
1.6
Polarity
DC
Const. current YES
Pulsed
YES
Medium freq.
YES
Amperage
10-100 100-200 10-100 100-200
- Repeat the above tests with earth lead with connected to
protection earth potential.
Final inspection of power source and settings
Amperage
2.5
95
5
180
2.5
95
5
180
in
connectors
of
board
red
green
green
2.4
1.6
2.4
DC
AC
AC
YES
YES
YES
YES
YES
YES
YES
-
-
10.9)
Checking current delivered
Conditions
- Ammeter clamped on earth lead.
- Power source on, set to TIG DC mode.
Checks
- Perform various welding tests in TIG mode, making sure the
value read off the power source's panel matches the clamp-
on ammeter's reading, i.e.:
Set value
Reading
on panel
50 A
50 ± 2 A
100 A
100 ± 2 A
200 A
200 ± 2 A
WARNING!: If you are using a shunt & multimeter
for measuring the output current, perform tests in
TIG LIFT mode so as not to risk damaging the instru-
ment as a result of HF!
Reading
on ammeter
50 ± 5A
100 ± 5A
200 ± 5A
35
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