How long should the calibration cycle of medical instruments be?

In the relevant document CNAS-CL01:2018 in 7.8.4.3, there is an explicit provision, whether the calibration certificate or calibration label, should not have a clear recommendation on the calibration cycle, that is to say, the calibration organization can not clearly define the calibration cycle, the calibration cycle is required according to the actual situation, their own to confirm and arrange. What is the basis for confirming the calibration cycle of an instrument?

In the absence of a clearly defined cycle time, we would like to confirm the calibration cycle, which can be judged based on the last calibration time of the measuring instrument, that is, traceability. Routine instrument maintenance is better than half a year, part of the accuracy requirements are not so high, as well as the number of times the use is not very frequent, it may be a one-year inspection, to confirm the calibration cycle is based on the traceability of the previous work done. What is the principle of confirming the calibration cycle of the instrument? Instrument calibration cycle is based on two basic principles,

1-minimum risk value: after calibration, the instrument can be allowed to appear in the error, the risk caused by the value will be minimized.

2-minimum cost value: in the case of ensuring that the risk value of the instrument is minimized, the calibration method chosen, calibration institutions and calibration cycle to meet the minimum cost value, the most cost-effective is also an important principle in determining the calibration cycle.

What are the consequences of an unreasonable calibration cycle?

The impact of an unreasonable calibration cycle on an organization is continuous. First of all, the data management is easy to confusion, instrument measurement data error, easy to cause managers data analysis bias, thus pulling up the cost budget, reduce the rate of finished product qualification, for customers or operators, there may also be potential safety hazards.

How to scientifically confirm a good instrument calibration cycle? Instrument calibration cycle in fact can also be in the case of sufficient data, with some statistical methods to plan.1-Statistical method: according to the finished product pass rate to statistics, sufficient data, the failure rate of a high percentage, you need to shorten the cycle.2-Comparison method: after the calibration of the instrument, compared with the previous data, if a number of consecutive cycles of error are out of the permissible range, then you need to shorten the calibration cycle.3-Iconic Statistical method: the results of calibration as a time tracing point, drawing into a curve graph, calculate the effective drift of the curve of the instrument in one or more cycles, after summarizing the most appropriate calibration cycle can be calculated. Ltd. is a third-party calibration company specializing in providing instrument calibration, measuring instrument calibration, metrology calibration testing, metrology instrument calibration and other services. With 18 years of industry history, and a number of listed companies to maintain good relations of cooperation. The work of instrument calibration needs to become the daily work of business managers, rather than remedial work, so as to help managers control costs as well as quality and safety in a timely manner. I hope to bring you help.