Customer complaint handling report
Customer Name： Digital Date of Product： pressure gauge Description of Complaint Problem 1.In the case of no add pressure, the zero position of TPA56 product fluctuates from -0.2 psi to 0.4psi. Signature：
1. The technical department shall immediately investigate the causes of the product Temporary problems and provide solutions according to the investigation results. model： TPA56-60 Qty： 500pcs report： March 17th,2022 complaint Date of March 15th,2022 countermeasure Signature： 1.0-60psi range is made of 0-500 kpa core system, 0-500 kpa is equivalent to 73.5 PSI, which is equivalent to the net output voltage of the sensor becomes smaller. Conclusion: When the output voltage is low, the stability of the product display will decrease. 2. Some of the sensor cores had a smaller output, below 2mV/m2, resulting in a smaller net sensor output from the pressure gauge. Conclusion: When the output voltage is low, the Root cause analysis stability of the product display will decrease. 3. Under the condition of no pressure, in order to save power, the power supply will enter hibernation mode. Under this working mode, the sampling points of the instrument will become fewer and the stability of the display will decrease. Combined with the reasons (1) and (2) above, the stability of display will decrease. 4.The case where the above three reasons can cause zero beating when there is no pressure. In the case of pressure fluctuations, this will be alleviated.
NO.：MK-ZL-55
LOGO AABBCC Technology Co., Ltd
Signature： 1. Filter the sensor before production, and the output signal less than 2mV /V will not be used in the range of 60psi. 2. The technical department improved and optimized the software of the product, make the Permanent measure display of the product more stable without fluctuation in the hibernation mode. 3. For the products which fluctuates from -0.2 psi to 0.4psi. the company provides corresponding number of digital pressure gauge products that have been improved and optimized by software to customers. Signature： Audit： Effect tracking confirmation
After the technical department improved and optimized the software, the zero display of THE TPA56-60psi product had no fluctuation. Signature： NO.：MK-ZL-55
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