Automotive Wires Liquid Resistance Tester
The wire abrasion resistance testing machine scrapes the insulation surface back and forth along the axis of the sample and stops automatically when the scraper wears through the insulation and contacts the conductor. It is used to test the abrasion resistance of the wire insulation surface.
Working Principle
Continuity Test: During operation, a certain current is applied to the cable under test. The current and voltage at the cable end points are measured using the harness tester. The harness tester calculates the measurement results using Ohm's law to determine the correct resistance value. This resistance value is compared with the set resistance value to determine whether it meets the corresponding index requirements, and the result is displayed on the harness tester as pass or fail.
Insulation Test: During operation, a certain high voltage is applied to the cable under test, and other cables are grounded. The harness tester measures the current between the cables. If the current exceeds the user-set index, the cable is considered unqualified. When the user-set index is reached, the insulation resistance value is measured, and the result is displayed on the harness tester as pass or fail.
Withstand Voltage Test: During operation, a high voltage is applied to the cable under test for a certain period of time, and the current is measured. If the actual current exceeds the user-set index, the cable is considered unqualified, and the result is displayed on the harness tester. In addition to the conventional harness tests described above, more in-depth and additional tests may be performed, such as two-wire or four-wire resistance tests. The use of a wiring harness tester can replace traditional manual testing, greatly improving testing efficiency and ensuring test accuracy. The wiring harness tester developed by Antai can analyze common electronic components, find the appropriate detection method, and quickly locate the fault point.
Operation Instructions
1. Place the test object in the V-groove of the instrument's specimen base platform. Rotate the two clamping handles to level and secure the specimen. (The test object should be no longer than 750mm.)
2. Open the scraper holder's stopper to ensure contact between the scraper and the specimen. Select a counterweight of appropriate specifications according to the standard test requirements. (When opening the stopper, hold the guide rod with one hand and gently lower it into contact with the test object's surface to prevent distorting the test results.)
3. Connect the test object to the instrument's output terminal, turn on the power switch, and start the tester.
4. When the test object's internal conductor contacts the scraper, the instrument automatically stops. Lift the scraper holder and engage the stopper. Move the test object 120-150mm, rotate it 90 degrees, and re-secure it for testing. Repeat four times and compare the results against the standard to determine compliance.
Maintenance Methods
Electrode cleaning is a fundamental maintenance step. During testing, the electrode surface can easily become contaminated with sample debris, oil, or carbonization. These impurities can affect the stability of voltage transmission and, in turn, distort test results. To clean, disconnect the instrument from the power source. After the electrode has completely cooled, gently wipe the electrode surface with a soft, specialized cloth. For stubborn stains, apply a small amount of specialized cleaning agent. Avoid scratching with hard tools to prevent damage to the smooth electrode surface. After cleaning, ensure the electrode surface is dry and free of residue before proceeding.
Circuit inspections should be performed regularly. Focus on checking the internal and external connections of the instrument, checking for loose terminals and signs of damage or deterioration in the wire insulation. If any loose wiring is found, tighten it immediately. If the insulation is damaged, replace the wire with a qualified cable to prevent short circuits or leakage. Also, observe the appearance of all components in the circuit, checking for signs of burns, deformation, or other abnormalities. If any problems are found, contact a qualified technician for inspection or replacement.
Cleanliness of the sample placement area is equally important. After testing, debris, dust, and other debris may remain in the specimen placement area. Long-term accumulation can affect precise specimen placement and even interfere with testing due to conductive conductivity. After each test, the area should be cleaned promptly. Use a brush to sweep away dust and a damp cloth to wipe the surface to ensure a clean, tidy area free of any remaining foreign matter.
Maintaining the instrument's housing and heat dissipation components is also crucial. Dust and stains on the housing surface not only detract from the instrument's appearance but can also impair heat dissipation due to excessive accumulation. Regularly wipe the housing with a dry cloth to keep it clean. Check for clogged vents and cooling fans. If so, clean with compressed air or a brush to ensure unimpeded heat dissipation and prevent performance degradation or malfunction due to overheating.
Inspecting safety devices is crucial for safe operation. Regularly check the integrity and effectiveness of the instrument's insulation components, emergency stop buttons, and other safety devices. Insulation components must be free of damage and cracks to ensure they meet insulation standards. The emergency stop button should be responsive and immediately cut off power when pressed to prevent accidental damage to personnel or equipment. In addition, maintenance records should be kept, detailing the time, content, and problems found during each maintenance session. This allows for tracking the instrument's usage status, identifying potential issues, and providing a reference for subsequent maintenance and repairs. Strictly following this daily maintenance checklist can effectively reduce instrument failures, ensure that the instrument is always in good working condition, and reliably guarantee the accuracy and safety of your tests.
