Start Up; Overload Protection; Maintenance - Truper SOT-250A Manual Del Usuario

• The welding machine is built with a converter with a
mobile steel core. The primary and secondary windings are
wound independently from the converter steel core and
function with the converter as magnetic leak. The current
adjustment is made moving the sliding steel core forward
and backward. This operation make the leak value reaches
its maximum; the current goes down to the minimum and
vice versa. In this manner the current can be adjusted
gradually achieving a reliable current linearity.
• To adjust the current (moving the core forth and back)
turn the ampere control knob (A) until it reaches the
amperes needed the job shown in the ampere indicator (B).
• Set the switch (C) in the ON position and start welding.
• When stopping of finishing welding or when changing
electrode set the switch on the OFF position.
• Before making a welding job verify that corrosion and stains that are 1" around the joint to weld are removed or cleaned.
• Replace the electrode when there is 1/2" to 3/4" up to the electrode holder.
CAUTION
• The electrode burns at very high temperatures. Do not use your hand to replace it. Worn electrodes
shall be kept in a metal container.
• Do not use the electrode holder to hold the electrode covering. Hold it by the side with no covering.
• When finishing welding use a special hammer to remove the slag from the surface on the welding line once it is dry and
hard. To prevent personal injuries do not allow people in front of the work piece when removing slag.

Overload Protection

• The welder is built with a thermal protection to guard against overload. When an overload strikes, the welder will
automatically turn off and the overload light will light up. Allow the unit to cool down. The thermal protector will restart
the unit when the temperature is back to safe limits.
• Using the welding machine in a correct manner makes
longer the machine useful life.
ATENCIÓN
• Only qualified personnel shall make
repairs. We recommend to visit a
Authorized Service Center for repairs and to purchase
supplies or accessories.
• Before making any type of repairs first cut down the
power supply.
• Check regularly the input and output cables are firmly
connected and are not exposed. Any anomaly shall be
repaired immediately.
• Dust shall be removed often. Check the brackets,
regulating screws, etc., to double-check there are no loose
connection problems.
8
ENGLISH

Start up

C
A

Maintenance

B