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SATURN THERMOCOUPLE
CALIBRATION FACILITY
MODEL 877
User Maintenance Manual/Handbook
Isothermal Technology Limited, Pine Grove, Southport, PR9 9AG, England
Tel: +44 (0)1704 543830 Fax: +44 (0)1704 544799 Internet: www.isotech.co.uk E-mail: info@isotech.co.uk
The company is always willing to give technical advice and assistance where appropriate. Equally, because of the programme of continual
development and improvement we reserve the right to amend or alter characteristics and design without prior notice. This publication is for
information only
Page 1 of 28
Saturn model 877 Iss.08– 08/14
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Summary of Contents for Isotech Saturn 877
- Page 1 Isothermal Technology Limited, Pine Grove, Southport, PR9 9AG, England Tel: +44 (0)1704 543830 Fax: +44 (0)1704 544799 Internet: www.isotech.co.uk E-mail: info@isotech.co.uk The company is always willing to give technical advice and assistance where appropriate. Equally, because of the programme of continual development and improvement we reserve the right to amend or alter characteristics and design without prior notice.
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Page 2: Table Of Contents
CONTENTS CONTENTS ....................................... 2 GUARANTEE...................................... 3 CAUTIONARY NOTE ..................................4 EMC INFORMATION ................................5 ELECTRICAL SAFETY ................................5 Environmental Ratings .................................. 5 HEALTH AND SAFETY INSTRUCTIONS ..........................6 IMPORTANT SATURN `SPIDER' UNPACKING NOTE ......................7 INTRODUCTION ....................................8 THEORY OF OPERATION ................................9 SATURN HIGH TEMPERATURE CALIBRATION FURNACE 100°C TO 1300°C ................ -
Page 3: Guarantee
INTERFERENCE WITH OR FAILURE TO PROPERLY MAINTAIN THIS INSTRUMENT MAY INVALIDATE THIS GUARANTEE RECOMMENDATION The life of your ISOTECH Instrument will be prolonged if regular maintenance and cleaning to remove general dust and debris is carried out. ISOTHERMAL TECHNOLOGY LTD. -
Page 4: Cautionary Note
CAUTIONARY NOTE ISOTECH PRODUCTS ARE INTENDED FOR USE BY TECHNICALLY TRAINED AND COMPETENT PERSONNEL FAMILIAR WITH GOOD MEASUREMENT PRACTICES. IT IS EXPECTED THAT PERSONNEL USING THIS EQUIPMENT WILL BE COMPETENT WITH THE MANAGEMENT OF APPARATUS WHICH MAY BE POWERED OR UNDER EXTREMES OF TEMPERATURE, AND ARE ABLE TO APPRECIATE THE HAZARDS WHICH MAY BE ASSOCIATED WITH, AND THE PRECAUTIONS TO BE TAKEN WITH, SUCH EQUIPMENT. -
Page 5: Emc Information
The blue conductor should be connected to Neutral and the Brown conductor to Live (Line). Warning: Internal mains voltage hazard. Do not remove the panels. There are no user serviceable parts inside. Contact your nearest Isotech agent for repair. Voltage transients on the supply must not exceed 2.5kV. -
Page 6: Health And Safety Instructions
If cased, do not return the apparatus to its carrying case until the unit has cooled. There are no user serviceable parts inside. Contact your nearest Isotech agent for repair. Ensure materials, especially flammable materials are kept away from hot parts of the apparatus, to prevent fire risk. -
Page 7: Important Saturn `Spider' Unpacking Note
IMPORTANT SATURN `SPIDER' UNPACKING NOTE Cut open top of the outer box. Remove the polystyrene and shredded material. Carefully remove the inner case and stand it on its four screwed studding’s. Carefully unscrew bolts and remove chipboard and Polystyrene Square, exposing ceramic spider. Page 7 of 28 Saturn model 877 Iss.08–... -
Page 8: Introduction
INTRODUCTION This furnace has been uniquely designed for the accurate calibration of a number of thermocouples over a very wide temperature range. Introduced by Isothermal Technology in 1984, the full potential of the bath has yet to be realized. However, with proper care, a thermocouple may be calibrated from 100°C up to 1250°C in as many steps as required. -
Page 9: Theory Of Operation
With enough effort this fundamentally unsound device can be made to give fairly good results. The theory behind the Isotech Saturn Furnace is that a solid conducting sphere suspended in the centre of a hollow outer, heated sphere will take up the temperature of the outer hollow heated sphere by convection and radiation to give a very stable temperature reference without end or edge effects. -
Page 10: Saturn High Temperature Calibration Furnace 100°C To 1300°C
SATURN HIGH TEMPERATURE CALIBRATION FURNACE 100°C TO 1300°C INTRODUCTION The Isotech Saturn Furnace has been designed for the accurate calibration of thermocouples over the temperature range 100°C to 1300°C. Most high temperature calibration furnaces are no more than specially profiled muffle or tube furnaces in which thermocouples are placed in parallel tubes. -
Page 11: Horizontal Cross Section Through The Saturn
HORIZONTAL CROSS SECTION THROUGH THE SATURN PRINCIPLE OF OPERATION The Saturn comprises of a number of concentric shells. The outer layer of spun metal is for containment and support, inside this is a layer of ceramic fibre. Within the fibre is a ceramic spherical mantle containing the heater windings. Lastly, in the centre of the furnace is a solid ceramic sphere cast with 8 or 16 tubes* to be used for the thermocouples requiring calibration. -
Page 12: Nominal Dimensions
NOMINAL DIMENSIONS Page 12 of 28 Saturn model 877 Iss.08– 08/14... - Page 13 SPECIFICATION Size 425mm diameter sphere Weight 25 kilos Temperature Range 100°C to 1300°C No. of Calibration Points 8 normal - 16 to special requirements Diameter of Sensors Up to 8mm (others by arrangement) Depth of immersion 200mm Accuracy ±0.25°C at 1000°C (Using comparison techniques) Warm-up times* 1 hour to 700°C 3 hours to 1300°C...
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Page 14: Special Features
30 minutes should be allowed for full stabilization. Larger thermocouple inserts: Inserts of up to 10mm diameter can be accommodated in the furnace. Please contact ISOTECH for details. A PC interface is included. Page 14 of 28... -
Page 15: Each Unit Comprises
EACH UNIT COMPRISES Saturn Furnace Model 877 Saturn Spider Controller Spare set of Windings Thermocouple User Maintenance Manual/Guarantee Page 15 of 28 Saturn model 877 Iss.08– 08/14... -
Page 16: Precautions
If this happens, it will not impair the accuracy of the rest of the system, but will reduce its capacity. New central equalising spheres are available from ISOTECH. Over Temperature: - All the materials used in the construction of the furnace have been rated to 1,400°C. -
Page 17: Caution
CAUTION Before switching on, check that there is approximately 20Ω between the furnace heater windings and greater than 5Megohms between windings and outer furnace case. Assuming this is so you may now commission the furnace. Please read the operating instructions carefully before proceeding. Page 17 of 28 Saturn model 877 Iss.08–... -
Page 18: On Arrival
ON ARRIVAL On unpacking the Saturn you will find 4 parts:- The Controller. The furnace. The equalizing sphere complete with its pockets. A packet containing the control thermocouple, a spare set of windings and this instruction book. To assemble the furnace, use the following procedure:- Carefully remove all the packing material. -
Page 19: Commissioning
COMMISSIONING During its trip to you, the package containing the furnace may have become damp, therefore, we recommend the following initial procedure:- Switch on the furnace/controller and set the temperature to 100°C. Allow the temperature to reach 100°C and stabilise there for 2 hours. Increase the set temperature to 200°C. -
Page 20: Using The Controller
USING THE CONTROLLER FRONT PANEL LAYOUT The Temperature Controller The controller has a dual display, the upper display indicates the nominal block temperature, and the lower display indicates the desired temperature or setpoint. Altering the Setpoint To change the setpoint of the controller simply use the UP and DOWN keys to raise and lower the setpoint to the required value. -
Page 21: Instrument Address
On the Upper Display, the lower display will show the current value from OFF (default) to 999.9. The desired rate is set here with the UP and DOWN keys, the units are °C/min. When the SPrr is active the controller display will show "RUN", the lower setpoint display will now automatically update with the current value, known as the working setpoint. -
Page 22: Diagnostic Alarms
Display What it means What to do about it shows Electrically Erasable Memory Error: EE.Er Contact Isotech The value of an operator or configuration parameter has been corrupted Sensor Break: S.br Contact Isotech Input sensor is unreliable or the input signal is out of range. -
Page 23: Using The Pc Interface
The Isotech conversion leads are suitable for maximum combined lead lengths of 10M that is adequate for most applications. CONNECTIONS For RS232 use simply connect the Isotech cable, a 9 to 25 pin converter is included to suit PCs with a 25 pin serial converter. RS422 Connections... -
Page 24: Cal Notepad
CAL NOTEPAD Cal Notepad can be used can be used to log and display values from the Dry Blocks and an optional temperature indicator such as the milliK or TTI-10. The software requires Windows 9X, XP, a minimum of 5Mb of free hard drive space and free serial ports for the instruments to be connected. -
Page 25: How To Install Cal Notepad
HOW TO INSTALL CAL NOTEPAD Download the ZIP from http://www.isotech.co.uk/downloads (7.6Mb) Extract the files to a temporary folder Run setup.exe Follow the prompts which will install the application, a user manual with setup information and the necessary LabVIEW run time support files. -
Page 26: Getting The Best From Your Saturn
Set temperatures to 100°C and allow 1 to 1.5 hours for stabilisation to occur. Make two thermocouples type R or S, (or use two model 1600s available from ISOTECH). Place 1 in a designated pocket, place the second thermocouple in each of the other pockets in turn, taking readings in each pocket compared to the standard pocket. -
Page 27: Saturn Model 877 Performance Report - Appendix I
SATURN MODEL 877 PERFORMANCE REPORT - APPENDIX I STABILITY "The ability of a measurand to maintain constant its metrological characteristics". Short term less than 0.1°C Long term typically 1°C/year The function of the Saturn requires explanation. It comprises a spherical heater whose temperature is controlled. - Page 28 ACCURACY OF MEASUREMENT "The closeness of the agreement between the result of a measurement and the value of the measurand". This value will be a statistical combination of A.B.C.D. above. PLEASE NOTE The Saturn will give large errors and may be damaged by large diameter thermocouples. The high temperature sodium heat pipe furnace is the best furnace for large diameter thermocouples.
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