Planer Kryo250 Manuale utente
Kryo250
Operators' Manual
© 2004 Planer plc.
Planer plc
110 Windmill Road
Sunbury-on-Thames
Middlesex
U.K.
TW16 7HD
Telephone +44 (0) 1932 755000
Facsimile +44 (0) 1932 755001
Kryo 250 Operators’ Manual MA009478
Issue 1.0 July 2004
Notices
This equipment contains batteries and other components which have a limited
life. To ensure the long life of the equipment and help ensure trouble-free
operation, we recommend that you join one of our Maintenance and Support
Schemes. Please contact your supplier for details.
Good practice demands that in critical applications, reliance should not be
placed on a single source of data. Hard copies and backup copies should be
routinely kept.
All equipment supplied by Planer plc. is subject to a Warranty Agreement and
Limited Liability. In addition, software products are not sold but are licensed
for use and are subject to a Licence Agreement. Copies of these documents will
have been provided with the equipment or as part of the software installation.
Please ensure that you read these documents before using the equipment or
software. If you cannot locate this documentation, please contact your supplier
who will be able to provide you with copies.
Planer plc reserve the right to alter products and their specifications without
notice.
i
Symbols Used in this Manual
Failure to follow these instructions could result in personal
injury.
Failure to follow these instructions could result in damage to
equipment or samples.
This indicates first-aid advice.
Symbols Used on the Equipment
Caution: Refer to this manual and accompanying
documentation
Mains supply ON
COOL manual override
HEAT manual override
Display sample temperature
STOP key
RUN key
Alternating current
Mains supply OFF
ii
SAFETY PRECAUTIONS
IT IS IMPORTANT TO READ THIS SAFETY NOTICE PRIOR TO
OPERATING ANY EQUIPMENT
First Aid
IF IN DOUBT, SEEK IMMEDIATE MEDICAL
ATTENTION. If any quantity of liquid nitrogen comes
into contact with the skin or eyes, immediately flood that
area of the body with large quantities of unheated water,
apply cold compresses and seek medical attention. If the
skin is blistered or there is any possibility that eyes have
been affected, the patient should be taken immediately to
a doctor or hospital for treatment.
Safety
Failure to comply with these instructions could result
in personal injury
Operating the system in a manner not specified within in this manual or
under conditions outside of the specifications, see Appendix A, may result
in the protection offered by the equipment being impaired.
Avoid nitrogen build up: anywhere liquid nitrogen is used must be well
ventilated to reduce the risk of nitrogen build up. Small volumes of liquid
nitrogen convert to very large volumes of gas. This can result in
drowsiness, or in extreme cases, asphyxiation.
When liquid nitrogen is used in confined spaces, oxygen-deficiency alarms
must be installed. Guidance on ventilation requirements are given in
BCGA Code of Practice CP30, The safe use of liquid nitrogen dewars up to
50 litres.
When there is a risk of reduced or insufficient ventilation when a room is
unoccupied, then alarms to indicate oxygen deficiency must be installed
and positioned outside of the room so that operators are aware of the
hazard before entering. The operational status of such an alarm should also
be visible from outside the room.
iii
If liquid nitrogen is used in an area that requires forced ventilation, an
alarm to indicate its failure should be fitted.
When dispensing or potentially being exposed to liquid nitrogen, protect
the face with a shield and wear gloves, boots and a protective apron.
Prevent spillage into shoes and onto unprotected parts of the body.
Handle vessels containing liquid nitrogen carefully. Liquid nitrogen boils at
-196ºC and both liquid and gas can cause rapid and severe frostbite.
Delicate tissue, e.g. the eyes, can be damaged by an exposure to the cold
gas, which may be too brief to affect the skin of the hands or face.
Stand clear of boiling and splashing liquid nitrogen and its gas when filling
a dewar at normal room temperature or when inserting objects (such as a
pump) into the liquid.
Use tongs or wear cryogloves when handling cold or hot objects.
Cryogloves are available as an accessory from Planer plc. When running a
program, the chamber and contents may get cold enough to cause frostbite.
The dewar must be depressurised before the pump can be removed. This is
achieved by opening the pressure-relief valve mounted on the side of the
pump, which seals an orifice in the pressure system by toggle action. Avoid
contact with cold nitrogen gas when depressurising the dewar.
The dewars used with this equipment must never be used to store any liquid
other than liquid nitrogen.
Only use vessels designed for working with liquid nitrogen.
Secure the liquid nitrogen container to prevent toppling.
Ensure that the delivery pipe connections are secure and leak-free before
supplying liquid nitrogen to the freezer.
Liquid nitrogen pressure must not exceed 1.7 bar (25 psi).
To maintain protection against electric shock, the mains lead must be
properly fitted to a 3-way mains connector plugged into an earthed mains
outlet.
Because of the potentially wet laboratory environment, the operator should
be provided with additional protection against electric shock by supplying
mains power to the freezer through a residual current circuit breaker
(RCCB) operating at a differential of 30 mA. Note that care must be taken
iv
to ensure that the freezer is not compromised by faulty equipment sharing
the same supply and causing nuisance trips.
The mains outlets on the chamber’s rear panel are only for use with the
Planer LNP4 unit and the Kryo250 Controller.
The 9-way plug on the Controller is only for connecting to the RS232
serial port of a computer that complies with IEC950.
The 37-way socket on the Controller is only to be used for connecting to
the chamber's cable.
The AUX socket on the Controller is to be used only for calibration by
qualified service personnel. It must not be connected to any other
equipment.
The Sample PRT socket on the chamber's rear panel is only to be used
with a Planer Sample PRT.
When heating under manual control, check the chamber temperature at
intervals of 30 seconds or less to avoid overheating.
User servicing is limited to cleaning and decontamination. All other
servicing must only be undertaken by suitably qualified engineers.
To avoid risk of fire, fuses must always be replaced with the same type and
rating.
Do not move the chamber whilst still wet after a freezing run.
v
EMC AND ESD CONSIDERATIONS
The following precautions must be taken to ensure that the
equipment is not damaged by electrostatic discharge (ESD),
and that its immunity to radio frequency interference is not
compromised.
Ensure that the Controller is not running a program and that the mains
power is disconnected before connecting or disconnecting any cable.
Fit the plastic covers and plugs provided to all unused connectors.
Immediately before touching the sample PRT, touch an earthed part, such
as the metal surface at the rear of the Controller.
Do not touch any uncovered connectors with your hands or tools, even
when the equipment is switched off.
When connecting the system to a PC via the 9 way plug, always use a fully
screened cable no longer than 2m.
Take care to avoid placing freezers in environments influenced by sources
of electromagnetic interference, such as cyclotrons, large transformers etc.
vi
Contents
3-2The Run has Stopped Prematurely ..........
3-2Troubleshooting ..............................
3-2Calibrating the System .........................
3-1Routine Maintenance ..........................
3-1
Routine Maintenance and
Troubleshooting
Chapter 3
........................
2-6Unexpected Reset .............................
2-6Power Failures ...............................
2-6Shutting Down the System ................
2-5Warming the Chamber ...................
2-5Stopping a Run .........................
2-5Removing the Samples ...................
2-5Loading the Samples ....................
2-4Starting the Run ........................
2-4Freezing Samples .............................
2-3Controller Rear Panel ..........................
2-2Controller Front Panel .........................
2-1Chamber Front Panel ..........................
2-1
Operating the Kryo250Chapter 2
.................
1-8Loading Printer Paper .........................
1-7Removing the Pump .....................
1-7Testing the Dewar .......................
1-6Fitting the Pump ........................
1-5Filling the Dewar .......................
1-5Connecting the Delivery Hose .............
1-5Installing a Planer Pump and Dewar ..............
1-4Installing a CryoCyl Low Pressure Cylinder ........
1-3Installing the Kryo250 .........................
1-2Rear Connections .......................
1-1Top View .............................
1-1Overview of the System ........................
1-1
Installing the SystemChapter 1
...................
viEMC and ESD Considerations .............
iiiSafety Precautions ............................
iiSymbols Used on the Equipment .................
iiSymbols Used in this Manual ...................
i
N
otices .....................................
vii
B-1
Safety DeclarationAppendix B
A-2Fuses .......................................
A-2Chamber Specifications ........................
A-1Controller Specifications .......................
A-1System Specifications .........................
A-1
SpecificationsAppendix A
...........................
3-4Returning for Service ..........................
3-3No Response from the System .............
3-3The Chamber will not Heat ...............
3-3The Chamber will not Cool ...............
viii
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