Büchi Labortechnik AG
Cleaning and servicing | 9
Operation Manual Lyovapor™ L-300/L-300 Pro
101/118
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The leak test is passed if the measured leakage rate is less than the pre-set rate
of 10.10 mbar*L/h.
Troubleshooting after failed leak test
Possible cause
Action
Top-mount drying rack not correctly fit-
ted
Fit the top-mount drying rack correctly.
O-rings dirty
Wipe down the O-ring with a damp cloth.
O-rings damaged
Check O-rings and replace if necessary.
Groove of O-rings dirty
Wipe groove of O-rings with a damp
cloth.
KF clamps not closed
Close the KF clamps.
KF seals dirty
Wipe down the KF seals with a damp
cloth.
KF seals damaged
Inspect KF seals and replace as necessary.
Pump oil dirty
Service according to manufacturer's in-
structions.
Leaking manifold valves
(manifold acrylic drying chamber only)
Replace leaking manifold valve.
Locate leaking manifold valve. See Chap-
ter 10.3 "Locating leaking manifold
valve", page 105
9.3.2
Performing leak test with a manifold drying rack
The leak test checks the vacuum system for possible leaks.
Time
re-
quired:
45 min
NOTE
The leak test can be aborted by tapping
[Stop]
on the function bar.
Navigation path
➜
Configuration
➜
Servicing
➜
Leak test
Precondition:
R
Conditioning of the instrument has been completed.
u
Fit the base plate with a KF 40 blind flange, an ISO-KF 40 seal and an ISO-KF 4
clamp.
u
Navigate to the action
[Leak test]
via the navigation path.
u
On the
[Ice Condenser]
line, enter a required setting for the vacuum.
u
On the
[Shelf temperature]
line enter the required shelf temperature.
u
On the
[Test scope]
line select the component to be tested.
u
On the
[Drying shelf heating]
line switch the drying shelf heating on or off.
u
On the
[Volume]
line enter the actual volume of the components to be tested.
The following options are available:
