GB/T 24121-2009Textile products - Determination of the remains of broken sewing needle (English PDF)

3.1 Testing Equipment

According to detect the nature of the subject and the type of textile products related standards and form selection with appropriate sensitivity detection equipment.

3.1.1 transport metal needle machine

used textiles production and processing enterprises, textile products detected in needles left behind iron, iron and other ferromagnetic

Substances can also be used to detect the detection mechanism for textile products in categories needle or ferromagnetic metal residues. Common detection sensitivity (standard iron

Ball test card, also known as the standard needle test block) have. 0.8mm, 1.0mm, 1.2mm, 1.5mm, 2.0mm, 2.5mm and 3.0mm.

3.1.2 Desktop metal detector

for small pieces, thin pieces, bedding and other textile products in categories needle or ferromagnetic metal residues detection

Measurement. Common detection sensitivity (standard iron ball test card, also known as the standard needle test block) have. 1.0mm, 1.2mm, 1.5mm and

2.0mm.

3.1.3 hand-held metal detector

for the detection of small pieces, thin pieces of broken needles and other textile products in class or ferromagnetic metal residues may also be

Other auxiliary needle machine accurate detection of defective needle class or ferromagnetic metal residues. Common detection sensitivity (standard iron ball test card,

Also known as the standard needle test block) have. 0.8mm, 1.0mm and 1.2mm.

3.2 Operating Environment

3.2.1

Detection equipment should stay away from magnetic sources (such as large transformers, high voltage power lines, electric fans, motors, etc.) and local oscillator.

3.2.2

testing equipment around 1m or less without any ferromagnetic metal objects.

3.3 calibration requirements

3.3.1

each calibration, should be turned off, wipe testing equipment.

3.3.2

testing equipment to normal operation after startup, calibration.

3.3.3

testing equipment officially detection, calibration should be performed for the first time every time.

3.3.4

Detection equipment should be calibrated at least once a continuous work within 2h.

3.3.5

concludes, response testing equipment for the last calibration.

3.3.6

shall designate a person calibration and testing, staff shall not carry watches, cell phones, keys, metal buckle with a magnetic leader belts

Items.

3.3.7

Calibration with iron ball test card selected according to the detection sensitivity of the device or intended size thereof.

3.3.8

Calibration transport metal needle machine using 9 test method (see Appendix A) for calibration. Desktop can refer to the use of metal detectors.

3.3.9

hand-held metal detector after each boot, and issued a tweet appeared luminescent signal, the power to meet the requirements, or need to replace the

Source; standard iron ball test card placed in hand-held metal detector square meter surface of the effective height, can trigger the alarm sound, then meet

Testing requirements; otherwise requires inspection, repair and testing equipment, iron ball until the standard tests until the alarm card declined.