Watchful problem answers in experiment process:

* should survey a few sample more to same group sample. According to usual test discovery, to same group sample, the data that jumps over in the future to reach tends more stable. Accordingly, to get its real value, the proposal is abandoned go the test value of first time.

The condition with different *

When having transition, should have the move such as zero of test of film of systematic zero, standard, sample film test, system afresh, and the different sample to akin test condition, successive test had better have to sample film after standard film checks, such, can improve work efficiency already, attainable accurate test data.

* tests the variation that test antrum temperature observes seriously in the process. Usual test discovers, after the instrument works for long continuously, temperature can be compared former the temperature on the high side of set.

* should hold the solution in testing speech clean and right amount, avoid appearance of sample of its bring into contact with, the influence measures an outcome.

* notes the problem of face of positive and negative of material, namely the direction that vapor passes through, to the material that two sides material differs character, measures outcome will be different. If vacuum plating is aluminous filmy to a few special material, had better not face towards plating aluminous layer tall wet environment, lest make its structure is damaged, cause an effect to measuring an outcome thereby.

* experiments every time daub is right amount vacuum is oily, assure good sealing.

After * flowmeter mix up, had better not change at will.

If * checks time to grow too, lv of take an examination undertakes calibration to standard film afresh.

* should assure to check environmental stability. Because Mocon uses infra-red detector, particularly sensitive to surroundings, when surroundings when wave motion is bigger, the Lv of accuracy take an examination that measures data to assure place is abandoned go during this oxygen detects through the quantity

Aerobic transmitance checks a method:

One, standard of basis of the law that press difference: GB/T1038-2000 " plastic film and chip gas pass through sexual experiment method---The law that press difference " detect equipment: Instrument of transmitance of gas of machine of essence of life silvers coin east

Experiment principle: Lie between the space that becomes independent into two with test film, will among them a side (high-pressured room) fill determine with gas, and another side (low-pressure room) criterion vacuumize, such in sample two side arose to press difference certainly, the gas of high-pressured room can pervade low-pressure room through film, through measuring the change of bulk of low-pressure side gas or pressure to calculate gas passes through a quantity, unit Cm3/m2·d·Pa.

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