How to Judge the Accuracy of a Tester

Judging the accuracy of a battery tester involves a number of aspects, here are some key steps and methods to evaluate the accuracy of a tester:

1. Check the technical specifications
Resolution: Check the resolution of the tester, i.e. the smallest unit it can measure. The higher the resolution, the better the tester's accuracy usually is.
Accuracy: Check the accuracy metrics provided by the manufacturer, usually expressed as a percentage or absolute value. For example, ±0.2% + ±2 counts.
Stability: The stability of the tester's performance over long periods of operation or repeated measurements.
2. Calibration Standards
Calibration Standards: Ensure that the tester can be calibrated and that there are clearly defined calibration standards and procedures.
Calibration equipment: Calibrate the tester with a standard cell or calibration equipment of known accuracy to check whether the test results are within the allowable error range.
3. Repeatability test
Consistency: Perform several tests on the same battery to check the consistency of the test results. If the results are very different, it may indicate that the tester is not accurate.
Cycling Test: Perform multiple charge/discharge cycles to evaluate the tester's performance in repetitive testing.
4. Comparison with reference equipment
Comparison Test: Perform the same test using another tester with known high accuracy and compare the test results of the two devices.
Difference analysis: Analyze the difference in results to determine if the tester's accuracy meets the requirements.
5. Check certification and standards
Certification Marks: Check whether the tester has passed the relevant international or national standards certification, such as ISO, IEC, etc.
Standards compliance: Check whether the tester meets the specific industry testing standards.
6. User evaluations and professional reviews
User feedback: Check the user evaluation and professional forums to understand other users' evaluation of the tester's accuracy.
Professional evaluation: Refer to the evaluation report of the tester from professional organizations or third-party laboratories.
7. Manufacturer's support and warranty
Technical support: Ask whether the manufacturer provides technical support, including accuracy verification and calibration services.
Warranty policy: Understand the manufacturer's warranty policy, high-precision equipment usually has more reliable warranty services.
8. Practical application testing
On-site testing: Test the tester in the actual working environment to evaluate its performance in real-world applications.
Through the above steps, you can comprehensively evaluate the accuracy of the battery tester. It is important to note that no tester can provide infinite accuracy, so it is important to choose a tester with an accuracy rating that meets your specific application needs.

from:How to Judge the Accuracy of a Tester