1. Parameter detection : check whether the parameters of the transducer match the parameters of the electric box and whether it can achieve the desired effect.

2. It can be distinguished from its production process and appearance : it directly reflects the importance of technology to product quality, and the quality of products with good process and appearance will naturally be better (but not absolutely). Moreover, the design process directly affects the product quality.

3. It can be identified according to its process design and materials used : but this requires a good understanding and experience of transducer materials. Whether the design is reasonable or not should be determined according to the selected materials. The quality of the materials directly affects the quality of the product, and it may not be copied according to the board. The material of the same specification is different from the place of production, and the quality is very different. The poor material is good. Technology also makes good products.

4. Computer test :

(1) Stability test (simulated aging test); test the power output stability of the electric box and transducer with the rated load of the equipment.

(2), overload operation test; test the stability and life of product quality. This test only needs to carry the rated load and run continuously for 8 hours.

(3) Power output test; it can detect the matching between the transducer and the electric box, and at the same time reflect the size of the electric box and the load power output of the transducer. The larger the mold belt, the better the working effect, indicating the power output The stronger. (The current can only reflect the output efficiency, not the power of the device)