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a. set switch S3 to "INT", S1 to "TIG" and S2 to "SHORT",
b. connect pins (1) and (2) of socket X03 (press the trigger of connected to machine
welding torch) and set current value to 100A, after releasing the trigger there
should be initial current value for contact arc striking diplayed,
c.
load the source with 1Ohm + 0,24Ohm welding resitors -- no current should flow
through the resistors as the trigger is released (output voltage = 0V),
d. press the trigger on welding torch, 6--8A current should flow through the resistors,
e. simulate lifting of the electrode and arc striking -- just disconnect and connect again
the 0,24Ohm resistor; that should cause 100A current flow through the welding
resistors (according to the value set in p. 13.b.).
SERVICE INSTRUCTIONS
ESD
What is ESD?
A sudden transfer or discharge of static electricity from one object to another. ESD stands for
Electrostatic Discharge.
How does ESD damage occur?
ESD can cause damage to sensitive electrical components, but is not dangerous to people.
ESD damage occurs when an ungrounded person or object with a static charge comes into
contact with a component or assembly that is grounded. A rapid discharge can occur,
causing damage. This damage can take the form of immediate failure, but it is more likely
that system performance will be affected and the component will fail prematurely.
How do we prevent ESD damage?
ESD damage can be prevented by awareness. If static electricity is prevented from building
up on you or on anything at your work station, then there cannot be any static discharges.
Nonconductive materials (e.g. fabrics), or insulators (e.g. plastics) generate and hold static
charge, so you should not bring unnecessary nonconductive items into the work area.
It is obviously difficult to avoid all such items, so various means are used to drain off any
static discharge from persons to prevent the risk of ESD damage. This is done by simple
devices: wrist straps, connected to ground, and conductive shoes.
Work surfaces, carts and containers must be conductive and grounded, use only antistatic
packaging materials. Overall, handling of ESD--sensitive devices should be minimized to
prevent damage.
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WARNING !
STATIC ELECTRICITY can damage circuit
boards and electronic components.
Observe precautions for handling electrostatic
S S S S
sensitive devices.
Use proper static- -proof bags and boxes.
S S S S
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Edition 071024
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