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Cangzhou Nanhua Experimental Instrument Co., Ltd
Daily maintenance and calibration cycle management of laboratory instruments in concrete mixing plants
Date: 2025-11-21Read: 2
The concrete mixing plant laboratory is responsible for core tasks such as raw material inspection, mix proportion verification, and factory quality control,Concrete mixing plant laboratory instrumentsThe reliability is directly related to the quality of concrete products and engineering safety. Therefore, establishing a systematic daily maintenance and calibration cycle management system is the foundation for ensuring the accuracy and compliance of experimental data.
Daily maintenance should adhere to the principle of "prevention first, responsibility assigned to individuals". For example, before daily use, the pressure testing machine needs to check whether the oil circuit leaks and whether the piston is flexible; Electronic scales should be kept clean, avoid vibration, and regularly checked for readings using standard weights; Mechanical tools such as slump cones and vibration tables need to be checked for loose fasteners and rust on the surface. All maintenance activities should be recorded in the equipment log to form a closed-loop management.
In terms of metrological calibration, a graded calibration plan should be developed based on the "Concrete Quality Control Standard" (GB 50164) and JJF series metrological technical specifications. Mandatory calibration equipment (such as press machines and scales) must be calibrated annually by legal metrology institutions; Non mandatory but critical equipment (such as gas content meters and Weber viscosity meters) can be calibrated internally and compared externally, with a typical cycle of 6 months. For high-frequency devices such as mixers and vibration tables, it is recommended to conduct functional verification every 3 months.
Special attention should be paid to the impact of environmental factors. Fluctuations in temperature and humidity can affect the determination of the setting time of cement paste, so the constant temperature and humidity curing box needs to be monitored and recorded daily. At the same time, establish instrument archives, including instructions, certificates of conformity, calibration certificates, maintenance records, etc., for easy traceability and auditing.
Moreover, personnel training is crucial. Operators should be familiar with the principles, operating procedures, and methods of identifying abnormalities of the equipment to prevent rough operation or overload operation. Through institutionalized and standardized maintenance and calibration systems, the concrete mixing plant laboratory can continuously output high-quality testing data, laying a solid quality defense line for engineering construction.