临床实验室离心机的校准

Centrifuge Calibration for the Clinical Laboratory

目的对我院临床实验室离心机的转速、时间、温度等主要技术指标进行校准,并修正校准过程中发现的误差以保障检验质量,确保设备工作状态正常。方法以离心机日常使用时的设定条件为校准点分别测量转速、时间和温度,以±50 r/min(或相对误差2%)、±2 s、±2℃为控制限度,对超过范围的技术参数进行修正,并对修正后的设定值进行进一步检测、确认。结果 33台离心机经检测、校准,离心机的时间设定均不需要修正;30%的离心机需要进行转速修正;1台低温冷冻离心机需要进行温度修正。修正后转速误差均在±50 r/min范围之内,且最大相对误差由16.435%降低为0.761%;温度误差也由-3.33℃降低为-0.43℃。结论通过校准可以修正离心机使用过程中产生的转速、时间、温度方面的误差,使离心机工作在最佳状态,保证实验室工作质量。

Objective To calibrate the main technical indexes of the centrifuge in the clinical laboratory,such as speed,time and temperature,and to correct the error in the calibration process so as to ensure the inspection quality and the normal operation of the equipment.Methods The speed,time and temperature were calibrated and measured respectively according to the values setting in the normal operation of the centrifuge.±50 r/min（or relative error 2%）,±2 s and ±2℃ were taken as the control limits respectively.The technical parameters were corrected and then further tested and confirmed.Results The time setting of 33 units of centrifuges did not need to modify.Speed correction was needed for 30% of the centrifuge.Only 1 low temperature refrigerated centrifuge needed to be revised in its temperature.The corrected speed error was within the range of ±50 r/min with the maximum relative error ranging from 16.435% to 0.761%.And the temperature error was ranging from-3.33 to-0.43℃.Conclusion The error of speed,time and temperature during the process of the use of the centrifuge could be corrected though calibration.It was important to keep centrifuges running in the best state to guaranty the quality of clinical laboratory.