The needleless lur connector negative-pressure air leak test is used to accurately detect air leaks in the negative-pressure environmentMedical equipmentIt plays an important role in the medical field. The following is a detailed account of it:
Modus operandi: based on gas stress differentials and changes in flow. The tester uses the tectonic effect of high-speed ejection of compressed air through a vacuum generator to create a negative pressure environment below external atmospheric pressure within the rohr interface. If there is a leak in the rohr interface, the external air enters the interface under pressure differentials, the high-precision pressure sensor accurately captures the change in pressure and transmits the signal to the control system, which calculates the negative pressure leakage rate through pre-set algorithms and standards, thus determining whether the roul interface is satisfactory。
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High-precision pressure sensor: is the "sensitization organ" of the test instrument, capable of accurately measuring changes in internal pressure in the interface, with some of the good pressure sensors having an accuracy of ±0. 01% fs (full range) and providing core data support for the accurate calculation of the negative pressure leakage rate。
Vacuum generator: is responsible for generating the negative pressure environment required for testing, capable of meeting the target negative pressure in a short period of time and maintaining negative pressure stability to ensure that the conditions for each test are consistent。
Control systems: the "brain" as a tester, controls the vacuum generator, regulates the negative pressure size and duration, analyses data from pressure sensors in real time and determines the validity of the rohr interface based on set thresholds。
Seal clips: for the purpose of securing the fixed roar connection, ensuring that the connection is closely sealed with the tester and preventing external air leaking into the link during testing and interfering with the test results。
Performance indicators
Negative pressure set range: usually flexible between -10kpa and -94kpa to simulate the negative pressure environment that the rohr interface may face under a variety of practical scenarios。
Test time setting: free to be set from 1 second to 10 minutes, short time for rapid check-ups on the production line, long time suitable for in-depth testing of the higher-required interface。
Test process
Preparation: equipment and materials such as test instruments, rohr interface, connections to pipes, seals, etc., are prepared and checked for integrity, failure to connect pipes, quality of seals, etc。
Connection installation: strongly connect raoul toTest equipmentUpward, use of specialized tools to operate the connection in accordance with the prescribed twist and axis direction requirements to ensure close connectivity。
Parameter settings: an accurate setting of parameters such as negative pressure, test time, etc., on the test instrument interface according to actual needs and relevant standards。
Commence testing: start testers, vacuum generators, create pre-set negative pressure environments inside the rohr interface, operators closely follow key data such as pressure change curves, leakage rates on the screen, and observe air leaks such as bubbles around the interface with the naked eye。
Results analysis: after testing, analysis based on recorded test data and phenomena determines whether there is an air leak at the rohr interface。
Relevant standards: internationally, the iso 80369 series of standards provide detailed regulations for the testing of negative-pressure leakage rates for medical devices and attachments to small caliber connectors (including the roar interface). At the national level, the gb 15810 " one-time use of sterile syringes " and the gb/t 1962 series also included negative-pressure leakage rate tests for the rohr connection as important detection items。
