Tamson Instruments bv, van 't Hoffstraat 12, 2665 JL Bleiswijk, Netherlands
.
+31(0)10 – 522 43 73 Fax. +31(0)10 – 521 19 41
\\word\manuals\tlv25\\mantlv25.doc Date 09-2010 Rev. 1.31 UK
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Cryostat, Installation and use
Put the unit in its proper place. Leave enough room around the cryostat for sufficient air circulation. Place the
unit in a clean working environment and keep away from dust. When air can not circulate well the cryostat
will overheat itself resulting in irreversible and severe mechanical damage. Dust will block the condensor and
might also cause overheating of the system. Overheating will cause severe damage to the compressor.
The cold finger can be placed in the TLV25 holder, next to the three opening lids for the viscosity meter
holders. When the TLV25 is fully filled with methanol the cryostat can be switched on. In all cases water is
not recommended to use in combination with a cryostat. Water will freeze very quick around the cooling coil
preventing proper energy exchange between the cold finger and the bath fluid.
It is possible to cool down other processes with the cold finger i.e. rapidly lower temperature in hot fluids. It is
not recommended to permanently cool fluids with a temperature above 80
°
C. Pressure inside the evaporator
circuit will be extremely high and can causing severe thermal damage to the compressor.
Regularly check:
The apparatus to see if airflow is not blocked around apparatus,
Apparatus and condensor are free from dust,
Hose is not mechanically damaged.
Cryostat fails to operate
Check if apparatus is switched on and power is on mains. Check mains fuse. The KV40 has no fuse build in,
the KV80 has a fuse on the front panel next to the power switch.
•
Fan does not function
Check wiring inside apparatus and see if nothing is blocking the fan
•
Ventilator makes noise
Open apparatus and check blocking of the fan. After several years bearings can be worn out. replace fan.
•
Ice forming on cold finger
Water vapour in the air condensates on the top of the cold finger. In time this ice will grow, forming a block of
ice. Turning of the cryostat and let the ice melt, or prevent air from forming condensate by insulating the cold
finger.
•
Bad cooling due to forming of ice (crystals).
Do not use water or water glycerine mixture as a bath medium. Instead use methanol.
It is advised not to move the refrigeration hose at low temperatures. Only move the
apparatus and hose when switched off and cold finger at room temperature.
