Sealing detectors are divided into two categories: direct pressure type and differential pressure type., mainlyDifferent detection methodsAnd there is a difference。

⑴Sealing detector direct pressure typeofOperation process: Inflate the cavity of the workpiece under test under certain pressure conditions,Thencut offMeasure the connection between the workpiece and the air source and record the pressure indication at this time. After a certain period of time, after a certain period of time,ThenagainreadcurrentPressure indication sumsuperiorRecorded pressure indicationmake oneCompare.ifTwo pressure indicationsexista difference,expressThere is a leak in the measuring chamber.thisDifferenceofsize reflectionGot itwithin the detection time periodtestedLeakage status of the workpiece, differenceifThe larger the value, the more serious the workpiece leakage is.This differenceifin permissionofscopeOfInside,At onceCan be considered as the workpiece being testedyesqualifiedof.on the contrary,regarded asUnqualified.

⑵ Seal detector differential pressure mode detectionlikeLever balance weighingSame.Put one end of the scalesuperiorbase weight,andOtheroneendbutputsuperiorThe number of parts to be inspected is constantly increasing.addreducefewnumber of partsmakeThe scales are balanced,at this timemass of weightthat isPart quality.Seal detectorDifferential pressure mode detection operation process：Use standards as references under the same process and state conditions.Ranback pairWorkpiece under testandStandard productconductCompare, by existenceThe difference is used to determine whether the tested workpiece is qualified.First of all, in the air tightness instrumentConnect the marked standard product to the standard product, and then connect the standard product at the same timeandThe cavity of the workpiece to be tested is inflated and passeda paragraphAfter the equilibrium time,Completely isolate the standard product from the test workpiece cavity and monitor the pressure for several seconds or tens of seconds before comparison.twopressure indicationdifference，SoThis pressure indicationDifferencethat istestedThe pressure leakage value of the workpiece cavity,ifPressure indicationThe difference isin permissionofscopeOfInsideSeeforThe product under test is deemed to be qualified,On the contraryUnqualifiedof。