PAT-80
● PAT-85 ● PAT-86 – USER MANUAL
59
5
Measurement of welding machines
In the test selection menu press
Welding machines
to go to a submenu with welding machine tests.
Tests not described in this chapter are carried out identically to the corresponding manual tests, pre-
sented in
All welding measurements
can also be made with weld-
ing cables
– but
only if the
cables are functional
.
5.1
Measurement of R
ISO
(LN-S, PE-S) in welding machines
Tests consist of measuring insulation resistance:
between shorted primary side conductors (L and N) and secondary winding of the welding ma-
chine (R
ISO
LN-S),
between the PE conductor and the secondary winding of the welding machine (R
ISO
PE-S).
NOTE!
For Class I appliances, the measurement only makes sense if:
the R
PE
measurement was positive and
the standard R
ISO
measurement was positive.
Press:
R
ISO
LN-S
. Depending on
the tested appliance go to
step
or
.
R
ISO
PE-S
. Depending on
the tested appliance go to
step
or
.
Before starting the measurement, similarly to
sec. 4.2
, following parameters must be set:
test volt-
age U
ISO
,
test duration
and
limit
.
Tested appliance must be turned on.
Test circuit is electrically isolated from the mains and from mains' PE lead.
Test result should be read only after displayed values are stabilized.
After the measurement the tested object is automatically discharged.
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