Victor Flowmeter/ Regulator - ESAB fabricator 141i Service Manual

ESAB FABRICATOR 141i
NOTE!
The welding circuit may or may not be
earthed for safety reasons. Changing the
earthing arrangements should only be
authorized by a person who is compe-
tent to assess whether the changes will
increase the risk of injury, e.g. by allowing
parallel welding current return paths which
may damage the earth circuits of other
equipment. Further guidance is given in EN
60974-13 Arc Welding Equipment - Instal-
lation and use (under preparation).
B. Assessment of Area
Before installing welding equipment, the user shall make an
assessment of potential electromagnetic problems in the
surrounding area. The following shall be taken into account
1. Other supply cables, control cables, signaling and tele-
phone cables; above, below and adjacent to the welding
equipment.
2. Radio and television transmitters and receivers.
3. Computer and other control equipment.
4. Safety critical equipment, e.g. guarding of industrial
equipment.
5. The health of people around, e.g. the use of pacemakers
and hearing aids.
6. Equipment used for calibration and measurement.
7. The time of day that welding or other activities are to be
carried out.
8. The compatibility of other equipment in the environ-
ment: the user shall ensure that other equipment being
used in the environment is compatible: this may require
additional protection measures.
The size of the surrounding area to be considered will
depend on the structure of the building and other activities
that are taking place. The surrounding area may extend
beyond the boundaries of the premises.
C. Methods of Reducing Electromagnetic Emissions
1. Electricity Supply
Welding equipment should be connected to the Electric-
ity Supply according to the manufacturer's recom-
mendations. If interference occurs, it may be necessary
to take additional precautions such as filtering of the
Electricity Supply. Consideration should be given to
shielding the supply cable of permanently installed
welding equipment in metallic conduit or equivalent.
Shielding should be electrically continuous throughout
it's length. The shielding should be connected to the
Welding Power Source so that good electrical contact is
maintained between the conduit and the Welding Power
Source enclosure.
2. Maintenance of Welding Equipment
The welding equipment should be routinely maintained
according to the manufacturer's recommendations. All
SAFETY AND INSTALLATION
access and service doors and covers should be closed
and properly fastened when the welding equipment
is in operation. The welding equipment should not be
modified in any way except for those changes and ad-
justments covered in the manufacturer's instructions. In
particular, the spark gaps of arc striking and stabilizing
devices should be adjusted and maintained according
to the manufacturer's recommendations.
3. Welding Cables
The welding cables should be kept as short as possible
and should be positioned close together, running at or
close to the floor level.
4. Equipotential Bonding
Bonding of all metallic components in the welding
installation and adjacent to it should be considered.
However. Metallic components bonded to the work
piece will increase the risk that the operator could
receive a shock by touching the metallic components
and the electrode at the same time. The operator should
be insulated from all such bonded metallic components.
5. Earthing of the Workpiece
Where the workpiece is not bonded to earth for electri-
cal safety, nor connected to earth because of it's size
and position, e.g. ship's hull or building steelwork, a
connection bonding the workpiece to earth may reduce
emissions in some, but not all instances. Care should be
taken to prevent the earthing of the workpiece increas-
ing the risk of injury to users, or damage to other
electrical equipment. Where necessary, the connection
of the workpiece to earth should be made by direct
connection to the workpiece, but in some countries
where direct connection is not permitted, the bonding
should be achieved by suitable capacitance, selected
according to national regulations.
6. Screening and Shielding
Selective screening and shielding of other cables
and equipment in the surrounding area may alleviate
problems of interference. Screening the entire welding
installation may be considered for special applications.

3.08 Victor Flowmeter/ Regulator

Flowmeter/ Regulator (Figure 3-1) attached to the cylinder valve
reduces high cylinder pressures to suitable low working pres-
sures for welding, cutting, and other applications.
LOW PRESSURE
GAUGE (DELIVERY)
OUTLET
CONNECTION
Figure 3-1: Victor CS Flowmeter/ Regulator
3-6
HIGH PRESSURE
GAUGE (SUPPLY)
INLET
CONNECTION
PRESSURE
ADJUSTING
SCREW
A-09414_AC
Manual 0-5448