Operating the Device
19
3.6 Filling the vessel
CAUTION
A pressure relief must be carried out for safety reasons prior to the removal of the supply line for
the liquid nitrogen.
• Close the tap on the liquid nitrogen tank and start the connected device. Wait until the
pressure has audibly dropped.
CAUTION
The liquid nitrogen tank must not be connected to any other device during the filling process.
Fig. 6: Front view
NOTICE
Damage to the device
Incorrect filling of the tank
–
Foreign particles or humidity and thus the formation of ice crystals may
block the pipes and valves of the cooling system, and cause malfunctions.
•
Do not remove the lever (HE) when filling.
•
Adhere to the specified order when filling the tank.
• Close all valves. (
V1, V2, V3
)
• Remove the transfer hose (ZF) from the connector (
SA
).
• Connect the filling pipe to the connector (
SA
).
• Open the exhaust and overflow valve (
V3
).
• Open the extraction valve (
V1
).
• Fill the Dewar until liquid nitrogen escapes from the exhaust and overflow valve (
V3
).
• Close the extraction valve (
V1
).
• Close the exhaust and overflow valve (
V3
).
V1
V3
V2
ZF
SA
