1、 Daily cleaning

• regular cleaningThe circuit resistance tester may be affected by pollutants such as dust and oil during use, so it needs to be cleaned regularly.
• Cleaning MethodWhen cleaning, the testing instrument should be powered off first and the surface of the instrument should be wiped with a clean cloth or cotton swab. Be careful not to use cleaning agents containing acidic or alkaline components to avoid damaging the testing instrument.

2、 Regular calibration

• calibration cycleThe circuit resistance tester may experience errors after a period of use, so regular calibration is required. The calibration cycle can be determined based on the frequency of use and instrument accuracy requirements, and it is generally recommended to calibrate at least once a year.
• calibration methodDuring calibration, standard resistors should be used for comparison and adjustments should be made based on the test results to ensure the accuracy of the testing instrument. The calibration process should be strictly carried out in accordance with the instrument manual or relevant standards.

3、 Environmental management

• Avoid impact and vibrationDuring the use of the circuit resistance tester, it should be avoided from being subjected to impact and vibration to prevent damage to the electronic components inside the testing instrument. When handling testing instruments, they should be handled gently to avoid collisions and falls.
• Keep dryDuring the use of the circuit resistance tester, it should be avoided from being affected by moisture and water to prevent damage to the electronic components inside the testing instrument. When storing testing instruments, they should be placed in a dry and ventilated place to avoid prolonged exposure to humid environments.
• Avoid high and low temperaturesDuring the use of the circuit resistance tester, it should be avoided from being affected by high and low temperatures to prevent damage to the electronic components inside the testing instrument. When storing testing instruments, they should be kept at room temperature to avoid prolonged exposure to high or low temperatures.
• Avoid electromagnetic interferenceThe circuit resistance tester may be affected by electromagnetic interference during use, resulting in inaccurate test results. Therefore, during testing, the testing instrument should be avoided from being too close to other electronic devices to avoid electromagnetic interference.

4、 Operating standards

• Correct wiringUse specialized low resistance test wires and strictly follow the four terminal connection method for wiring. Ensure that the voltage test line and current output line are correctly connected to the corresponding terminals of the tested equipment to avoid wiring errors that may result in inaccurate measurement results or instrument damage.
• Handle with careDuring operation, the handheld circuit resistance tester should be handled gently to avoid impact, inversion, or placing heavy objects on the instrument to prevent damage or affect testing accuracy.
• Choose the appropriate testing currentSelect the appropriate testing current based on the rated current and testing requirements of the tested equipment. Avoid inaccurate measurements or equipment damage caused by excessive or insufficient testing current.
• Waiting for the instrument to stabilizeDuring the testing process, wait for the instrument to stabilize before taking readings. Generally speaking, after the resistance meter displays a stable value (usually 5-10 seconds), record the measurement result.
• Organize the testing lineAfter the test is completed, the power lines and test lines should be sorted out, and the instruments and lines should be installed in the wire box to avoid loss. At the same time, check if the testing line is intact and replace it promptly if it is damaged.

5、 Battery maintenance

• Regularly replace the batteryLoop resistance testers typically use batteries as a power source, so batteries need to be replaced regularly. When replacing the battery, attention should be paid to the polarity of the battery to avoid installation errors that may cause damage to the testing instrument.
• Maintain sufficient battery lifeBefore using the circuit resistance tester, ensure that the instrument battery is fully charged. Insufficient battery may affect the testing progress and accuracy of the test results.