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Isotech Saturn 877, User Maintenance Manual/Handbook, Page: 11 / 28

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Isotech Saturn 877 User Maintenance Manual/Handbook Download Page 11

                                        

 

Page 11 of 28 

Saturn model 877 Iss.08– 08/14 

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. 

 

*Depending on design requirements. 

 

 

 

 

 

Summary of Contents for Saturn 877

Page 1: ...land 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 beca...

Page 2: ...OF OPERATION 11 NOMINAL DIMENSIONS 12 SPECIAL FEATURES 14 EACH UNIT COMPRISES 15 PRECAUTIONS 16 CAUTION 17 ON ARRIVAL 18 COMMISSIONING 19 SAMPLE RESULTS 19 USING THE CONTROLLER 20 FRONT PANEL LAYOUT 2...

Page 3: ...GLASS PARTS ARE NOT COVERED BY THIS GUARANTEE INTERFERENCE WITH OR FAILURE TO PROPERLY MAINTAIN THIS INSTRUMENT MAY INVALIDATE THIS GUARANTEE RECOMMENDATION The life of your ISOTECH Instrument will be...

Page 4: ...ENT 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 T...

Page 5: ...pment must be correctly earthed This equipment is a Class 1 Appliance A protective earth is used to ensure the conductive parts cannot become live in the event of a failure of the insulation The prote...

Page 6: ...the apparatus when it is hot or cold unless wearing the appropriate protective clothing and having the necessary training 6 Do not drill modify or otherwise change the shape of the apparatus 7 Do not...

Page 7: ...UNPACKING NOTE 1 Cut open top of the outer box 2 Remove the polystyrene and shredded material 3 Carefully remove the inner case and stand it on its four screwed studding s 4 Carefully unscrew bolts a...

Page 8: ...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 A variety of special designs are a...

Page 9: ...or edge effects The second step in the design of the sphere was the assumption that the point at the centre of the inner solid sphere would be not only at a stable temperature but would be virtually...

Page 10: ...of the centre of the sphere 3 7 to 15 thermocouples can be calibrated simultaneously 4 The accuracy 0 25 C in 1000 C of the furnace has only previously been achieved by using heat pipes 5 Because of...

Page 11: ...hells 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 c...

Page 12: ...Page 12 of 28 Saturn model 877 Iss 08 08 14 NOMINAL DIMENSIONS...

Page 13: ...irements 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 Stabilizatio...

Page 14: ...and stable performance It is the configuration around which the specification has been written To special order the following options are available 1 16 Thermocouple Inserts Because of the extra therm...

Page 15: ...Page 15 of 28 Saturn model 877 Iss 08 08 14 EACH UNIT COMPRISES 1 Saturn Furnace Model 877 2 Saturn Spider 3 Controller 4 Spare set of Windings 5 Thermocouple 6 User Maintenance Manual Guarantee...

Page 16: ...re available from ISOTECH 3 Over Temperature All the materials used in the construction of the furnace have been rated to 1 400 C However at these temperatures the life expectancy of the heater windin...

Page 17: ...ng on check that there is approximately 20 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...

Page 18: ...ctly in the grooves provided and is symmetrically placed inside the furnace Use some small pieces of insulation supplied to pack underneath the pockets so they sit on a soft bed of insulation rather t...

Page 19: ...cedure 1 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 2 Increase the set temperature to 200 C Allow 2 hours fo...

Page 20: ...r display changes to indicate the new setpoint ADVANCED CONTROLLER FEATURES Setpoint Ramp Rate By default the bath is configured to heat and cool as quickly as possible There may be some calibration a...

Page 21: ...controller has a configurable address which is used for PC communications Each instrument has an address this allows several instruments to be connected in parallel on the same communications bus The...

Page 22: ...t a module is of the wrong type missing or faulty Contact Isotech Err1 Error 1 ROM self test fail Consult Isotech Err2 Error 2 RAM self test fail Consult Isotech Err3 Error 3 Watchdog fail Consult Iso...

Page 23: ...y chained together The benefit of this approach is that a number of calibration baths may be connected together in a daisy chain configuration and then linked to a single RS232 see diagram Note The RS...

Page 24: ...ure 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 DEVELOPMENT Cal NoteP...

Page 25: ...which will install the application a user manual with setup information and the necessary LabVIEW run time support files 5 Should you ever need to uninstall the software then use the Add Remove Progra...

Page 26: ...aluation of this profile The profile will be consistent throughout the life of the furnace and enable calibration to be performed to an accuracy of 0 25 C 1 Set temperatures to 100 C and allow 1 to 1...

Page 27: ...ld be about 1 C per year or better at 1000 C provided the atmosphere is oxidizing B MEASUREMENT UNCERTAINTY An estimate characterizing the range of values within which the true value of a measurand li...

Page 28: ...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 thermocoup...

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