OTF 5000/HS/LS-001/2/3/4 Iss 4 June 2012
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Whenever the cryostat chamber is allowed to warm up above freezing point (e.g. during a full
defrost) the knife should be removed, warmed up, cleaned and/or decontaminated, oiled and
then stored in its box in a dry place.
The Bright 50230 cryostat knife normally supplied with the cryostat can be sharpened on a
conventional knife sharpening machine. Alternatively, Bright Instrument Co Ltd offer a knife
sharpening service.
4.5
OPERATING IN EXTREME CONDITIONS
The refrigeration system used in Bright cryostats is highly efficient and will cope well with high
ambient temperatures. However, where conditions of high humidity exist, it may be necessary to
adjust the automatic defrost cycle in order to ensure that the evaporator cooling fins remain frost
free.
It is recommended that additional defrost cycles are initiated at convenient times (e.g. 1800hrs,
0600hrs). This is done by pressing in the appropriate pins on the clock to give two further thirty
minute defrosts (refer to section 2.1.6).
Do not exceed the defrost cycle time beyond thirty minutes as this could cause the entire
chamber to warm up above 0ºC.
4.6
SERVICING AND REPAIRS
In the event of a breakdown a qualified person should be called.
If a service visit is required, the cryostat should be defrosted, decontaminated (refer to section
4.8), cleaned thoroughly and left switched off in preparation for that visit, unless otherwise
advised by the engineer. Please remember that the cleaning procedure should also include
removing the microtome and cleaning underneath where it sits in the chamber - the microtome
should be left out of the chamber until the arrival of the engineer. Failure to carry out this action
will result in the service visit being cancelled and could incur further call-out charges. A
completed decontamination certificate must be left with the cryostat and work will not
commence until the engineer has seen sight of that certificate (refer to details regarding
decontamination certificates on the page marked Safety Information towards the front of this
instruction manual).
If the cryostat or any part of it is returned to the distributor or manufacturer, it must be
decontaminated (refer to section 4.8) and cleaned thoroughly. Please remember that the
cleaning procedure should also include removing the microtome and cleaning underneath
where it sits in the chamber. A completed decontamination certificate must be either sent in
advance or attached to the outside of the packaging of the returned goods. Work on the
returned goods will not proceed until the decontamination certificate has been received (refer to
details regarding decontamination certificates on the page marked Safety Information towards
the front of this instruction manual). Should no decontamination certificate be received, or the
cryostat or any part of it be received in a condition that Bright Instrument Co Ltd consider to be
a potential biological hazard, the cryostat or part will be retuned, unrepaired, at the expense of
the customer.
4.6.1 UK
For customers in the UK, Bright Instrument Co Ltd offer a comprehensive range of after sales
services that include extended warranties and a full range of service contracts. For further
information or for any refrigeration, electrical or mechanical problems contact Bright Instrument
Co Ltd direct providing the following information:
Model (see ID plate on rear panel)
Serial Number (see ID plate on rear panel)
Date of installation
Nature of fault
Summary of Contents for OTF 5000
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