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|  MIL-W-45992A(AL)
limits as specified in NEMA EW-1.
4.10.2 Circuit voltage. To assure compliance with 3.4.6.2 the data shall
indicate the maximum open circuit voltage shall not exceed 100 volts. In the CC mode
the volt-ampere data shall indicate that the steady state short circuit current shall
not be greater than 200 percent nor less than 110 percent of the normal current for
any particular setting. With the machine operating in the CC mode and no load applied
an oscilloscope shall be connected to the output terminals to visually observe the
ripple voltage of the welder output. The ripple voltage shall not exceed 10 percent
of the open circuit voltage.
4.10.3 Welding performance. To assure compliance with 3.4.6.3 and NEMA EW-1 the
welding performance tests shall be performed by a trained operator. Welds on test
plates shall be visually examined for acceptable quality. Failure of the welding
machine to perform any of the tests in 4. 10.3.1 and 4.10.3.2 shall be cause for
rejection of the welder.
Welding tests in the CC mode shall be as
4.10.3.1 Welding tests in the CC mode.
follows:
(a) Using the welding leads specified in paragraph 3.3.10 (5O ft (15.24 m)
lengths), welding operations shall be performed using the SMAW process with
5/32 inch (3.97 mm) diameter E-6010 electrodes on mild steel plates, 2 pieces
approximately 2 inches (50.8 mm) by 10 inches (254 mm) by 1/4 inch (6.35 mm)
in a horizontal fillet position, tee joint. Welds shall be 10 (254 mm) long.
(b) Using the above welding leads, arc gouging torch, air supply and appropriate
accessories (contractor supplied), cutting and gouging shall be performed (AAC
process) using 5/32 inch ((3.97 mm) diameter copper coated carbon electrodes
10 inches (254 mm) by 1/2 inch (12.7 mm). Cut one piece across the 4 inch
(101.6 mm) width and gouge the other 10 inch (254 mm) length.
(c) Using a gas shielding tungsten electrode welding set (TIC torch), hose,
cables and regulator supplied by the contractor, with Argon gas, 1/16 inch
(1.59 mm) diameter 2 percent thoriated tungsten, perform a horizontal fillet
lap joint weld using 2 pieces of 2 inch (50.8 mm) by 10 inch (254 mm) by 16
gauge stainless steel. Using 1/8 inch (3.18 mm) diameter 2 percent thoriated
tungsten, perform a horizontal fillet joint weld using 2 pieces of 2 inch
(50.8 mm) by 10 inch (254 mm) by 1/8 inch (3.18 mm) stainless steel. Welds
shall be 10 inches (254 mm) long.
Welding tests in the CV mode shall be as
4.10.3.2 Welding Tests in the CV mode.
follows:
(a) Perform a horizontal fillet tee joint weld using .035 inch (.889 mm)
diameter AWS A5.18 classification ER-70S-3 wire on test Plates of 2 Pieces of
2 inch (50.8 mm) by 10 inch (254 mm) by 1/8 inch (3.18 mm) mild steel. The
contractor shall supply the gas shielded consumable electrode welding set, gas
hose, regulator flowmeter, cylinder of C02 and any other necessary accessories
required to perform this test. Welds shall be 10 inches (254 mm) long.
(b) Using the welding set and accessories specified above, perform a horizontal
fillet tee joint weld using l/16 inch (1.59 mm) diameter, flux cored wire on
test plates of 2 pieces of 4 inch (101.6 mm) by 10 inch (254 mm) by 3/8 inch
(9.53 mm) mild steel. Welds shall be 10 inches (254 mm) long.
(c) Using the welding set and accessories specified above, connected to a
cylinder of Argon gas, perform a horizontal fillet lap joint weld using .035
inch (.889 mm) diameter aluminum welding wire ER-4043 on test plates
consisting of 2 pieces of 2 inch (50.8 mm) by 10 inch (254 mm) by 1/8 inch
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