ATEQ ERD620, Быстрый старт

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QSG_ERD620_421.00_EN_01 / 2020-09-09
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Indirect measurement
The indirect measurement (also called recovery mode or under bell) allows a considerable
gain in time as the flow which enters into the device is already stabilized.
The test pressure is first applied to the input of the part under test 1 and then to the device
2 . The output of the device 2 is vented to the atmosphere.
This method allows to test the parts at a higher pressure test (up to 2 MPa).
1 Part under test
2 Device
Depending on the part type, it may be possible to use a bell (ex: shower head where
it is impossible to recover the flow other than through the use of a bell). This method can
only be used if the recovery of the flow is easy.
PRINCIPLE OF A CYCLE
The measurement cycle is made of 4 main phases: fill, stabilization, test, dumping.
A Pressure auto zero additional phase 0 can be placed at the start or at the end of a cycle,
depending on the requirement of the operator.
0 Pressure auto zero phase (optional)
1 Flow auto zero (0.8s) + Pressure up
time
2 Flow auto zero (0.8s) + Step time
3 Pressure down time
0 Pressure auto zero phase (optional)
1 Pressure up time
2 Step time
3 Pressure down time