Electromagnetic Compatibility - Sealey TIG160S Instructions Manual

Tig/mma inverter welders

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4.3.

TIG CONNECTIONS.

TIG TORCH CABLE. Dinse plug at the end of the torch cable is connected to the negative socket (-) on the front panel (see fig.2 item 7).

WORK CLAMP CABLE. Dinse plug at the end of the clamp cable is connected to the positive socket (+) on front panel (see fig.2 item 10).

4.4.

MMA CONNECTIONS.

NOTE: Requires optional ARC Accessory Kit INVMMA1/INVMMA2 - see specifications.

4.4.1. ELECTRODE HOLDER. Plug at the end of the electrode cable will normally (*) be connected to the positive socket (+) on the front panel (see fig.2 item 10).

4.4.2. WORK CLAMP CABLE. Plug at the end of the clamp cable will normally (*) be connected to the negative socket (-) on the front panel (see fig.2 item 7).

(*) Please note that the way the welding cables are connected to the inverter for ordinary MMA welding may be different to the way the cables

are connected for standard TIG welding. Whilst most stick electrodes are connected to the positive terminal certain types need to be connected

to the negative terminal. It is therefore essential that the user refers to the manufacturer's instructions for the electrodes to ensure that the

correct polarity is selected.

4.5.

CONNECTING THE GAS.

4.5.1. ARGON GAS: Cylinders containing argon gas have a female thread and will require the use of a Bull Nose Adaptor to attach the regulator to the cylinder.

Ensure that the threads on the gas bottle are undamaged and free of oil and grease before attaching the regulator. Fit the Bull Nose Adaptor to the cylinder

first and tighten with a wrench.

4.5.2. Fit the gas regulator onto the Bull Nose Adaptor.

4.5.3. Connect one end of the gas delivery pipe to the regulator and tighten with the clamp supplied. Connect the other end over the gas inlet spigot on the back

of the welder. Tighten to ensure a good seal.

4.5.4. Open the regulator before opening the cylinder valve. Test for leaks.

4.5.5. Set the gas flow to suit the welding parameters required. See tables below for general guidance.

4.5.6. If necessary the gas flow can be adjusted during welding using the regulator knob.

fig.5

4.6.

PREPARATION AND CHOICE OF ELECTRODE.

In order to produce a good weld it is important to choose an electrode of the correct diameter for the current to be used. For a general guide to the settings

to be used with particular diameters of electrodes please refer to the tables below. The electrode will normally protrude from the ceramic nozzle by 2 to

3mm but in order to gain access to inaccessible areas such as internal corners the electrode can be made to protrude by up to 8mm. The chosen electrode

should be sharpened axially on a grinding wheel as indicated in the diagram to the right. The tip should be perfectly concentric in order to avoid arc

deviations. The condition of the electrode should be regularly inspected to maintain it in peak condition.

4.7.

PREPARATION OF THE WORKPIECE.

For a good weld it is important that the workpiece is thoroughly cleaned so that no oxides, oil, grease or solvents remain on the surface of the material.

4.8.

(These figures are for guidance only)

TIG WELDING PARAMETERS FOR STAINLESS STEEL.

Thickness Current

Electrode

(mm)

(A)

(diam. mm) (diam. mm) (L/min) (diam. mm)

0.5 - 0.8

15 - 30

30 - 60

1.5

70 - 100

90 - 110

2.5

110 - 130

120 - 150

1.6 - 2.4

ELECTROMAGNETIC COMPATIBILITY

THIS EQUIPMENT IS IN CONFORMITY WITH THE EUROPEAN STANDARD EN 50199:- ELECTROMAGNETIC COMPATIBILITY OF ARC WELDING

EQUIPMENT AND SIMILAR PROCESSES (e.g. MMA AND TIG WELDING)

5.1.

PROTECTION AGAINST INTERFERENCE (E.M.C.). The emission limits in this standard may not, however, provide full protection against interference to

radio and television reception when the welding equipment is used closer than 30m to the receiving antenna. In special cases, when highly susceptible

apparatus is being used in close proximity, additional mitigation measures may have to be employed in order to reduce the electromagnetic emissions. At

the same time there could occur some potential difficulties in having electromagnetic compatibility in a non-industrial environment (e.g. in residential areas).

Therefore it is most important that the welding equipment is used and installed according to the following instructions:

5.2.

INSTALLATION AND USE. The user is responsible for installing and using the welding equipment according to these instructions. If electromagnetic

disturbances are detected, then it shall be the responsibillity of the user of the welding equipment to resolve the situation with the technical assistance of

the supplier. In some cases this remedial action may be as simple as earthing the circuit (see Note*). In other cases it could involve constructing an

electromagnetic screen enclosing the welding power source and the work complete with associated input filters. In all cases the electromagnetic

disturbances shall be reduced to the point where they are no longer troublesome.

Note*: The welding circuit may or may not be earthed for safety reasons. Changing the earthing arrangements should only be authorised by a person who

is competent to assess whether the changes will increase the risk of injury, e.g. by allowing parallel welding circuit return paths which may damage the

earth circuits of other equipment. Further guidance is given in IEC 974-13,'Arc welding equipment - Installation and use.'

5.3.

ASSESSMENT OF AREA. Before installing welding equipment the user shall make an assessment of potential electromechanical problems in the

surrounding area. The following shall be taken into account:

a) Other supply cables, control cables, signalling and telephone cables, above, below and adjacent to the welding equipment.

b) Radio and television transmitters and receivers.

c) Computer and other control equipment.

d) Safety critical equipment, e.g. Security monitoring of industrial equipment.

e) The health of people in the vicinity, e.g. Persons fitted with a pacemaker or hearing aid.

f) Equipment used for calibration or measurement.

g) The immunity of other equipment in the environment. The user shall ensure that other equipment being used in the environment is compatible. This may

require additional protective measures.

h) The time of day that welding and other activities are to be carried out.

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.

5.4.

MAINS SUPPLY. The Inverter should be connected to the mains supply according to these instructions. If interference occurs, it may be necessary to take

additional precautions such as filtering of the mains supply. Consideration should also be given to shielding the supply cable of permanently installed

welding equipment, in metallic conduit or equivalent. This 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.

Nozzle

Argon

Filler Rod

6.5

3 - 4

1.6

9.5

3 - 4

1.6

9.5

1.5 - 2