Buchi DuMaster D-480 User Manual download pdf (Page 303)

Operation Manual D-480 ©BÜCH Labortechnik AG

10 - Menu and dialog descriptions 303

 Maintenance work to be performed by the customer (on page 169).

Leak test: Test phases (Dialog)

Function

This dialog displays the current status while performing a leak test.

 The left half of the dialog displays the individual stages of the test. The current stage of the test is

marked with an arrow.

 The right half of the dialog displays the remaining time of the respective stage of the test and

system pressure.

 The result is displayed at the bottom of the dialog once the test is finished.

Open

Open the dialog by clicking Start in the "Leak test" dialog.

Elements

The following describes the elements of the dialog.

In the left area:

Label

Element type

Meaning

Pressure build-up Label The valves are switched to positions allowing pressure

build-

up in a certain section of the system (first stage of the

test).

Stabilization Label The gas inlet valve is closed. The system waits for a set

time to allow stable pressure conditions in the subsequent

test stage. If system pressure does not reach a defined

minimum pressure after this stage has ended, the leak test

is regarded as having failed. If minimum pressure is

reached, the system moves on to the next stage.

Test Label The initial pressure of the instrument is recorded at the

beginning. During this stage of the test, the system

constantly compares current pressure with the initial

pressure previously measured and calculates the current

drop in pressure. If the drop in pressure exceeds a certain

threshold during this stage of the test, the leak test is

regarded as having failed. If the drop in pressure stays

below the threshold, the system moves on to the next

stage.

In the right area:

Label

Element type

Meaning

0 ... x Sec. Label This field displays the remaining time of the respective

stage of the test.

Pressure, current Label This field displays instrument pressure.

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Buchi DuMaster D-480 User Manual Page 303

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