Zaxis Isaac HD, Руководство пользователя

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Vent - This is the amount of time to exhaust the pressure from the unit under test. Primarily this
is used as a safety to remove pressure away from the operator. The pressure is vented internally to the
Isaac. If the auto button is checked, the unit will automatically vent until test cavity pressure is less than
20 mbar. If the timed button is selected the vent will occur for the specified amount of time.
Options are available for the exhaust to be ported to the back of the Isaac for exit of a clean
room. And vacuum assisted vent to collapse the device (bags) for storage and transport.
Test Limits - A not-to-exceed amount of decay before the timer expires for a pass condition. If the
Decay limit is reached before the timer, the test will short cycle and result in a fail condition. To see the
decay in the full timer length, check the Evaluate at End of Test box.
An increase limit can be set to verify that no external or thermal dynamic forces cause the pressure to
increase over the test time. This limit must be enabled by checking the box. If the increase limit is used,
the Evaluate at End of Test box must also be checked.
Volume
– The Isaac can calculate the pressure drop of the test to show in a volumetric flow rate
(sccm). By entering the total volume of the part, any connection or fixture volume, along with the
internal volume of the tester, the flow rate will be calculated. The screen will show the approximate sccm
value if the part were to reach the full decay. Both the pressure decay and the leak rate will be shown on
the main run screen.
The atmospheric pressure used in the on-board calculation is in the menu.
P
R
E
S
S
U
R
E
T I M E
Fill Test Settle
Vent
Gross Leak
(Pressure Tolerance)
Reject Limit
Leak Rate
(cc/m)
=
∆
P
(psi) ●
Volume
(cc)
∆ t (minutes) ● ATM
(psia)