저온 인장 시험

1. 장비에 대한 기본 이해

1.1 주요 매개변수

1.1.1 장비 기술 사양

파라미터	주의 사항
변위 측정	Digital display, resolution 0.1 mm
Chuck Types	비자체 조임
인장 속도	25 ± 5mm/분
시편 사양	No. I and No. II Dumbbell Plates

1.1.2 적용 가능한 표준

The LS-B40 Low Temperature Tensile Testing Machine strictly complies with GB/T 2951.14-2008″General Test Methods for Insulation and Sheathing Materials of Cables and Optical Fiber Cables—Part 14: General Test Methods—Low-Temperature Tensile Test” (IEC 60811-505:2012), specifically clauses 8.3 and 8.4.

It is primarily used in electrical product quality inspection laboratories, the quality control departments of manufacturers of flexible cables and electrical accessories, third-party testing organizations, and for import and export product inspections.

1.2 장비 구성 검증

1.2.1 포장 풀기

When unpacking the device, handle it gently to avoid scratching the outer casing with sharp tools. After unpacking, first inspect the exterior of the device to ensure there is no obvious deformation or dents, and that the buttons are not damaged or loose. If you notice any abnormalities with the device or its accessories, do not turn it on. Please contact us immediately.

1.2.2 본체 및 부속품

번호	주의 사항
①	LS-B40 본체
②	전원 코드

1.2.3 전자 문서 다운로드

전자 사용자 설명서, 교정 인증서, 보증서 및 기타 문서의 다운로드 링크는 제품 발송 시 이메일로 이미 보내드렸습니다. 즉시 다운로드해 주시기 바랍니다. 만약 이메일을 받지 못하셨다면, 저희에게 연락하여 다운로드 링크를 다시 요청해 주십시오.

2. 안전상의 주의

2.1 전기 안전

Before connecting the power cord, verify that the supply voltage is AC 220 V ±10% and the frequency is 50 Hz or 60 Hz. You must use a three-prong outlet with a protective ground, and the protective ground resistance must be ≤4 Ω. Do not cut or disconnect the protective ground wire under any circumstances, as doing so poses a risk of electric shock.

2.2 운영 절차

During the test loading process, do not reach with your hands or body into the area of the clamps or the tensile transmission mechanism to prevent injuries from pinching or falling objects; the test specimen must be securely clamped to prevent it from falling out during the test; setting non-standard test speeds is strictly prohibited; and disassembling the machine without authorization is strictly prohibited.

3. 장비개요

3.1 Physical Composition of the Equipment

그림 3-1를 참조하세요.

번호	주의 사항
①	전원 스위치
②	터치 스크린
③	Buzzer alarm: The buzzer sounds when the movable chuck reaches the limit position.
④	모터
⑤	Specimen chucks (two in total); the one on the left is the fixed chuck, and the one on the right is the movable chuck.
⑥	Limit switches—two in total (one on the left and one on the right)

그림 3-1

3.2 Touchscreen Program Interface

3.2.1 초기화면

그림 3-2를 참조하세요.

번호	주의 사항
①	Go to the Test Interface
②	Go to the Help screen

그림 3-2

3.2.2 테스트 인터페이스

그림 3-3를 참조하세요.

번호	주의 사항
①	Current Displacement
②	Average displacement velocity for this test
③	Current Test Duration
④	Set the test speed; the default setting is 25 mm/min (see Section 1.1.2 for applicable standards). Note: Setting a non-standard test speed is strictly prohibited. If you have other requirements, please confirm them with us first.
⑤	시작/정지 테스트
⑥	Reset: Clears test data (including current displacement, average displacement speed for the current test, and current test duration) and clears the buzzer alarm.
⑦	Click to return the movable chuck to the 0 position
⑧	Click to set the current moving chuck position to position 0
⑨⑩	Click to move the movable chuck to the left or right
⑪	홈 화면으로 돌아가기

그림 3-3

4. Low-Temperature Tensile Test

4.1 샘플 준비

Two test specimens of appropriate length shall be taken from each test conductor and test jacket. The test specimens shall have a thickness of not less than 0.8 mm and not more than 2 mm. They shall then be stored at an ambient temperature of 23 °C ± 5 °C for at least 16 hours, after which two dumbbell-shaped test pieces, as shown in Figures 1 and 2 (if necessary) of Figure 4-1, shall be punched out along the axial direction of the test specimen.

그림 4-1

4.2 Pre-cooling Treatment

As shown in Figure 4-2, remove the device’s chuck assembly and place it in the low-temperature test chamber together with the test specimen to pre-cool for 4 hours.

그림 4-2

Next, place the Low Temperature Tensile Testing machine inside the low-temperature test chamber and reinstall the pre-cooled jaws onto the machine.

Note: The specific low-temperature test temperature should be determined by referring to the requirements for low-temperature performance in the relevant standards for different types of cables.

4.3 Sample Installation and Commissioning

Turn on the device. Based on the dimensions of the test specimen, click “Move Left” or “Move Right” to move the movable chuck, then secure both ends of the test specimen to the two chucks, and click to set the current position of the movable chuck to the zero position.

4.4 시동 테스트

Set the test speed preset to 25 mm/min. Then click “Start Test.”

If the specimen breaks during the tensile test, click “Stop Test” as soon as the break occurs. The touchscreen interface displays the current displacement, which is the tensile distance.

If the test specimen does not break at any point during the tensile test, the machine will sound an alarm when the jaws reach the stop. This indicates that the test specimen meets the standard requirements; click the “Reset” button to clear the buzzer alarm.

4.5 시험 결과 평가

Calculate the elongation according to the standard. Unless otherwise specified, valid test results must not be less than 20 percent.

4.6 Post-Test Procedures

4.6.1 장치 재설정

After the test is complete, remove the main unit from the low-temperature test chamber; do not leave the main unit inside the low-temperature test chamber for extended periods of time.

4.6.2 샘플 준비

Separate the samples that passed and failed the test, label them clearly, and avoid confusion.

5. 장비의 일상 유지보수 및 관리

5.1 Daily Maintenance After Shutdown

At the end of each day’s testing, clean dust and sample debris from the equipment surfaces, and keep the chucks and slide rails clean and free of debris; use a dedicated screen-cleaning cloth to clean the touchscreen; check that the chucks are not loose or deformed.

5.2 Weekly Routine Maintenance

Apply a small amount of special-purpose lubricating grease to the equipment’s guide rails and drive screws to ensure smooth, jam-free operation.

5.3 Maintenance During Long-Term Storage

After powering down the equipment for cleaning and completing routine maintenance, cover the entire unit with a dust cover and store it in a dry, well-ventilated warehouse; power it on for 30 minutes each month to prevent components from becoming damaged due to moisture.

5.4 교정 주기 요구사항

To ensure the measurement accuracy and operational reliability of the equipment, it is recommended that it be sent periodically to a qualified third-party metrology laboratory for calibration. The recommended calibration interval is 12 months. The specific calibration interval may be determined by the user based on frequency of use, environmental conditions, and quality system requirements.

6. 문제 해결 및 일반적인 문제 해결 방법

결함 증상	가능한 원인들	순서
Touchscreen lags; taps don’t register	Screen surface smudges causing interference; program crashes	Turn off the device, clean the screen, then restart it and try again.