After the finished product operator brings all produced copper wire to the packaging table, quality inspection must bring the UL1095. UL1007. and UL1015 electronic wires to the packaging table for rigorous quality inspection. Specific inspection standards must be strictly followed in accordance with the following procedures:

Ⅰ. Appearance Inspection:

A spool filled with UL1007 electronic wire must be placed on the packaging table. With one hand, hold a piece of white paper upright 1-2 cm from the wire. With the other hand, roll the spool of UL1015 electronic wire around once. Visually inspect the appearance to ensure it meets the following standards:

1) Smooth surface, free of black lines, stray wires, pitting, oxidation, nicks, scratches, dents, poor tinning (sticky tin, leaking tin), slanted lines, hand joints, or fingerprints.

2) UL2651 gray wire must be smooth and uniform, with no heaping, missing edges (one side high, one side low, or two sides high, two sides low), or strands.

3) The tension should be moderate, not too loose or too tight.

4) There should be no dust on the copper wire surface after rolling (overfilling).

II. Wire Diameter Inspection:

The wire diameter should conform to national and international standards. If the customer has special requirements, strict control should be implemented accordingly. Specific inspection steps are as follows:

1) First, check whether the micrometer is zeroed.

2) Place the copper wire to be inspected outside the micrometer's clamping clip and twist the end of the micrometer with appropriate force (not too much or too little).

3) After hearing three beeps, observe the reading.

4) Repeat this inspection two or three times until the readings are consistent (for the same copper wire). Do not inspect the same location each time; inspect in sections.

5) For copper wires with a diameter of 0.2cm or more, inspect the different interfaces of the copper wire to avoid flat wires.

III. Elongation Test:

Elongation requirements must comply with national standards. If the customer has special requirements, strict control must be followed. The specific steps are as follows:

1) Turn on the elongation tester.

2) Observe whether the left clamp is in its original position and whether the instrument reading has returned to zero. If the left sensing clamp is not in its original position and the instrument reading does not return to zero, immediately press the Reset and Zero keys.

3) Gently open the clamps. Place one end of the copper wire to be tested into the sensing clamp. Press the clamp down. Gently straighten the copper wire and place the other end into the other sensing clamp. Press the clamp down to secure the wire, and press the Test key.

4) After the sensing clamp breaks the copper wire and stops moving, observe the displayed reading. This is the elongation of the copper wire being tested.

IV. Resistivity Test:

Resistivity requires compliance with national standards. The specific test steps are as follows:

1) Turn on the resistivity tester.

2) Clamp the two inductive clamps together and observe whether the reading is zero.

3) If the instrument displays a reading of 0. take a 1m section of the copper wire to be tested and clamp each end of the wire with the two inductive clamps. The copper wire to be tested must not come into contact with any metal objects. Press the test button.

4) Observe the displayed reading and calculate the resistivity using the following method:

Resistivity = Reading ** 0.7854 * Room Temperature Conversion Factor / 1000

V. Qualified products will be stamped with the QC stamp.

Round Copper Wire Models:

TR - Soft Round Copper Wire

TY - Hard Round Copper Wire

TXR - Tinned Soft Round Copper Wire

TYT - Extra Hard Round Copper Wire