Equipment tester quality appraisal

The

equipment tester takes signal acquisition and benchmark comparison as its core principles. By optimizing sensor accuracy, signal processing algorithms and calibration traceability systems, it achieves the synergy of multi-parameter high-precision detection, dynamic response speed and data repeatability. It is widely used in electronic manufacturing, communication equipment, automotive electronics, aerospace and other fields. In semiconductor testing, it is used to verify chip function and reliability; in the power industry, it meets the accuracy verification requirements of relay protection devices; in the automotive electronic control field, it ensures the consistency of ECU signal response. Compared with general instruments, equipment testers have the characteristics of wide range coverage, strong anti-interference and high degree of automation. They are the core tools for product quality control and R&D verification.

Zhongke Testing is a product quality appraisal service organization registered with the court. It can provide equipment tester quality appraisal services. It has a professional appraisal team and advanced instruments and equipment to provide fair and accurate appraisal results for equipment tester quality appraisal.

With the upgrade of testing standards, related quality dispute cases have increased significantly. The judicial dispute focuses on:

1, performance indicator dispute: whether the measurement accuracy meets the standard, dynamic response timeout;

2, material defects: the temperature drift of the reference voltage source exceeds the standard, and the ADC chip has Insufficient number of valid digits;

3, process problems: signal path impedance mismatch, electromagnetic leakage from the shielding case;

4, contract performance dispute: core module replacement, software function does not match the technical agreement.

0 Such cases require clear quality responsibility through benchmark comparison, dynamic performance testing and hardware reverse analysis.

1

2

3

4

The quality appraisal of

equipment testers usually uses the following technical methods:

1. Appearance inspection and functional testing: Inspect the appearance, structure, and accessories of the equipment, and carry out functional testing to evaluate whether the equipment meets the design requirements and contract agreements.

2. Performance testing: Design a test plan based on the purpose and use environment of the equipment, test the accuracy, efficiency, reliability and other performance indicators of the equipment, and compare them with standard values or contract requirements.

3. Destructive testing: used to evaluate the durability and safety of the device. For example, extreme machining tests are conducted on machining centers to evaluate their extreme machining capabilities and stability.

4. Environmental test: simulate various environmental conditions that the equipment may encounter, such as high temperature, low temperature, vibration, humidity, etc., to evaluate the tolerance and adaptability of the equipment.

0

1

2

A testing agency of the applicant signed a "High-Precision Digital Multimeter Procurement Contract" with an instrument manufacturer of the respondent, agreeing that the voltage measurement accuracy is ±0.01%. During use, it was found that the 10mV range error exceeded ±0.1%. The manufacturer argued that it was caused by electromagnetic interference in the operating environment.

identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of the "Equipment Tester", contract technical agreement, on-site investigation case materials and other data, and made the following quality analysis conclusions See:

The reference voltage source of the equipment tester involved in the case has a temperature drift of 5ppm/℃ (protocol ≤2ppm/℃), and the input amplifier noise density is 10nV/√Hz (protocol ≤5nV/√Hz); improper PCB layout leads to 10mV range crosstalk (crosstalk ratio > -60dB).

The appraisal conclusion concluded that defects in hardware design and reference source were the main causes of the error.

0

1

2

Equipment tester quality appraisal report should include:

1, appraisal purpose and reference standards;

2, involved specifications, production batch number, construction record;

3, detection method and equipment list;

4, test data and failure correlation analysis;

05, clarify the quality responsibility determination conclusion and technical basis;

1

26, signature of the appraiser, professional qualification certificate and official seal of the organization.

3

4

5

6