Checking The Open-Circuit Voltage - Tp 1500 Vrd; Check The Arc-Force And Anti-Stick - Fronius TransPocket 1500 Service Manual

Checking the
open-circuit
voltage
(continued)
Fig.6
- Measure the open-circuit voltage with the voltmeter
- RMS value of the open-circuit voltage = approx.. 80 V
- Tolerance range = +/-15 V
If the open-circuit voltage is not within the tolerance range, this may mean that the
LCA15 board or the potentiometer are faulty.
Checking the The open-circuit voltage check procedure described as follows applies to power sources
TP 1500 VRD und TP 1500 TIG VRD.
open-circuit
voltage - TP 1500
VRD
Fig.6a
Check the arc-
force and anti-
stick
V/Amp.-
meter
Earthing clamp
Fig.7
TP 1500
-
+
V/Amp.-
meter
Variant 2: Measuring the RMS value
DC
TP 1500
VRD
-
+
V/Amp.-
meter
TP 1500 VRD: Measuring the open-circuit voltage
TP 1500
-
+
S
h
u
n
t
Rutile electrode
Check Arc force and Anti-stick
Variant 2: Measuring the RMS value
N.B.! The RMS value can only be of any
help in detecting a defect in the power
source in the event of very severe
deviations from the desired value.
- Plug the machine into the mains and
shift the mains switch to "I"
- Set the welding-current dial to
Maximum
DC
Use a multimeter to check the open-circuit
voltage.
- Plug the machine into the mains and
shift the mains switch to „I"
- Measure the open-circuit voltage with
the multimeter.
- Open-circuit voltage = ca. 10,5 - 12 V
If the value measured is below 10,5 V
this may mean that the VRD15 board is
faulty.
- Shift the mains switch to "O" and
unplug the machine from the mains
- Plug the welding cable with the rutile
electrode onto the (-) socket
- Plug the earthing cable with the shunt
onto the (+) socket
- Set the welding-current dial to
Maximum
- Plug the machine into the mains and
shift the mains switch to "I"
- Select the welding process "rod-
electrode welding"
- Set the parameter "Arc force" within
Workpiece
the set-up menu to the maximum value
which is possible
41
DC
,
DC