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1. QUARTZ SHEATH QUARTZ DISC QUARTZ CROSS ASSEMBLY SENSOR HANDLE STRAIN RELIEF BLACK SHRINK SLEEVE 3i us 150 00 i j m 2 5 METRES OF CABLE Range C Ro Ohms Sheath Diameter Length Sensing Comments Length 200 to 670 25 5 650mm 35mm Recommended for or wide range use in the 480mm Primary Laboratory Quartz 200 to 550 650mm 100 Ohm version or 480mm Quartz 80 to 670 650mm Metal sheathed high or temperature model 480mm 80 to 550 650mm 100 Ohm version or 480mm 200 to 165 480mm Metal sheathed low temperature model 30 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES SPRT Calibration with ITS 90 Fixed Points Premium Service ISOTECH UKAS Calibration Uncertainties k 2 Suitable only for lsotech 670SQ Models or other Primary Standard SPRTS of similar stability Fixed Point C Range EWI Range Range Range Range 1 2 3 4 5 6 Typical Uncertainties TP Argon 189 3442 1mK 2mK TP Mercury 38 8344 1mK 1mK TP Water 0 01 1mK 1mK MP Gallium 29 7646 FP Indium 156 5985 FP Tin 231 928 FP Zinc 419 527 FP Aluminium 660 323 Note TP Triple Point MP Melting Point FP Freezing Point BP Boiling Point Note The 1000 670 has a maximum temperature of 550 C and so cannot be UKAS certified over Range 4 Please contact Isotech if calibration is required above Zinc Table shows Premium Calibration Service Standard Service is also available see page 17 SOLUT
2. Optimal realization of the defining fixed points of the ITS We have a choice of UKAS calibration Services the 90 CCT 2000 13 With the Open Cell uncertainties of stated uncertainty figure is for our Premium UKAS 100 uK are achievable Calibration Service The Cell is supplied with a Certifcate of Metal Purity SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 11 ISUT CH 12 The Perfect Gallium Point Melt 1 Day1 0 000025K __ i Em B eS ae E aS 11810343 of 1 1810342 EE EP a a a 1 Value of 10 years old Cell 2 Value of N PL s Cell 3 Value of I M G C 5 Cell The information below is extracted from 4 Value of Cell open for over 3 years The Gallium Point An Alternative Reference Temperature to the Water Triple Point by John P Tavener Intercomparison of Water and Gallium Gallium Impurities Small Small Peritectics None None Variation with Isotopes Large None Found Interoperability Good Good Practical Variation 40uK 40uK H H Uncertainty Small 10uK Ruggedness Poor Good Ease of Use Difficult Easy Apparatus Ice Bath amp CO2 Warm Water Price Low High The Resealable Drift with Time 4uK year None Detected Gallium Cell Time before Best Accuracy 10 days 1 to 2 hours SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES E a ae ae esd Apparatus d Gallium E Simple to Use lil Automatic Operation E Totally Safe Operation Model 17402B Galliu
3. silver gold and copper require special handling and with many years of experience we can help you with the temperature points Isotech can UKAS certify any of these cells to the smallest uncertainties outside NIST Selecting Furnaces For indium through copper we have a choice of furnaces The Isotech Dual Furnaces use heat pipes for best performance and include a second independent furnace for annealing For those with existing annealing furnaces we offer Heat Pipe only models Three Zone furnaces can be used over very wide ranges Our Furnace Selection Guide will help you select the appropriate models for your needs Monitoring Thermometers Ideally each fixed point cell should have its own designated SPHT If this is unaffordable one SPRT can be used with a number of fixed point cells These SPHTs need to be very stable We recommend model 670SQ 25 5 480 for use with Hg H20 Ga In and Sn 670SQ 25 5 650 for any cell from Hg to and including Al and 96178 0 25 for Zn Al and Ag The above monitor thermometers can be supplied with UKAS certificates or you can certify them in your own fixed point cells In the primary lab only the resistors and the cells require external traceability ISUT CH Procedures and Uncertainties One of the great things about thermal metrology is that there is no approved way to calibrate One of our staff was asked by a UKAS Auditor how long it took to calibrate an SPRT
4. 1684 05 4mm sockets Thermocouples 4 20mA 10 100MBit Ethernet RJ45 socket USB 2 0 host 2 x RS232 9 pin D type plug 9600 Baud 89mm 3 5 QVGA 320 x 240 colour TFT LCD with LED backlight 0 45 C 32 113 F 0 99 humidity 15 30 C 50 85 F 10 90 humidity Operating Full Specification C F K Ohms mV and mA In Addition to Instantaneous Display user can select mean of 2 100 measurements with Standard Deviation 950mS Limited to 10Q per core or 10nF shunt capacitance equivalent to 100m of typical 4 core screened PTFE cable Capacity to store gt 180 Days of time stamped measurements to internal memory Isotech Semi Standard PRTS Isotech Model 909 SPRT 88 264V RMS 47 63Hz universal 6W maximum or 4 x AA cells 255mm x 255mm x 114mm 10 x 10 x 4 5 WxDxH 2 25kg 5lb 931 22 102 NOTE Due to our program of continual development and improvement we reserve the right to amend or alter characteristics and design without prior notice SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES ll Eight Channel Local and RS232 Control ll PRT and Thermocouple Models B Use with Isotech TTIs and Automation Software These switches have been designed for use in conjunction with our TTI range The switches allow easy selection of connected sensors They can be operated from either the front panel switch or from an RS232 interface that is provided as standard Chan
5. 32 33 909 Family Working SPRTSs 34 35 Standard Thermocouple eeee 36 Platinum Gold Thermocouple 37 Guide to Precision Thermometers and accessories 38 39 microK Precision Thermometer 40 42 microsKanner Channel Expander 43 TTI 22 True Temperature Indicator 44 45 millik Precision Thermometer 46 48 8 Way Selector SWIECTLuueiauciis cvi nior 49 Model SRA amp SRB AC DC Standard Resistors 50 Model 455 Resistor Maintenance Bath 51 Model 456 Temperature Controlled AC DC Resistors 52 Resistance Bridge Calibrator 53 The Best Comparison Calibration Equipment 54 55 Nitrogen Boiling Point Apparatus 57 Model 461 Simple Liquid N2 Apparatus 58 Model 459 Cryostat eee 59 Isis 100 C Dry Block amp os Dsum 60 61 915 Parallel Tube Stirred Liquid Bath 62 64 Immersion Depth 5 e M ES ENE 65 Orion 796 Stirred Liquid Baths 66 67 Hydra 798 Stirred Liquid Baths 68 70 813 Stirred Ice Water Bath E REED 71 Model 820 Large
6. 44 0 1704 543830 Fax 44 0 1704 544799 Email info isotech co uk Web www isotech co uk Contents Metrology Instruments Inside Front MOUCHO RIETI RETO 4 5 Primary ITS 90 Standards The Jarrett Isotech Water Triple Point Cells 6 8 Maintenance Bath Water Triple Point 9 Ice Mantle Maker Water Triple Point 10 Gallium Cell Sostmann Isotech 11 12 Galium ApparatUS i ciduad idu detineri HIERRO GI DNI 2 an 13 The Isotech Mercury Cell 14 Mercury Triple Point Apparatus 19 The Best Primary Standards for your Laboratory 16 UKAS Calibration Service for SPRTS 17 Fixed Point Cells Sealed and Open 18 19 International Traceability 20 Furnace Selction Guide 21 Dual and Heat Pipe Furnaces 22 23 Low Temperature Furnace 24 Medium Temperature Furnace scce 25 3 Zone High Temperature Furnace 26 Annealing FUN AGG acci isecienetontebau totos ctun mto hin de cx toni cans 21 Introduction to SPRTs and Standard Thermocouples 28 670 Family Primary SPAN ccccscdicccstiessecccnsdericacanaaze 29 31 Model 96178 Silver Point SPRT
7. 670SH 670SL 25 5 or immersion and self heating characteristics From the Model 670SQ 670SH 100 success of the original Model 670 SPRTs we have introduced new models into the 670 range offering metal State with UKAS Calibration or without UKAS sheathed and low temperature models Calibration SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 29 Whilst metal sheathed thermometers appear more robust than the quartz glass models it should be noted that ALL SPRIs are fragile devices and must be handled with care Quartz glass thermometers have the advantage that the Having selected the finest cells and apparatus select Isotech SPHIs with over thirty years experience of manufacturing platinum resistance thermometers it is not surprising we have developed the finest standard thermometers Our preferred standards in our UKAS lab are the 670SQ for up to 660 C and the 96178 0 25 for use up to the silver point 962 C internal components are visible and can be inspected and continue to be our recommended models The low temperature models have excellent immersion characteristics and a significant cost saving when compared to the higher temperature models Benefits to your laboratory ultra stability best SPRT vibration and shock resistance best immersion characteristics low self heating longer life and less contamination 650 00 90 00 m 50 fece
8. C in built indicator The indicator can be programmed with up Aluminium 660 323 C 0 002 C to five calibration points to provide high accuracy digital probe matching The indicator and controller are both Premium calibration service uncertainties shown addressable over the communications link See page 80 for full details 92 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 510 Metal Block Insert 510 06 01 510 06 02 510 06 03 510 06 04 Standard Insert Blank Insert Insert without pockets for local machining Special Insert Contact Isotech with your requirements Adjustable Equalising Block 511 Surface Sensor Kit 511 06 06 ITS 90 Fixed Points ISUT CH Includes an insert and angled thermocouple ITL17401M Gallium Slim Cell 510 only ITL17668M Indium Slim Cell ITL17669M Tin Slim Cell ITL17671M Zinc Slim Cell ITL17672M Slim Aluminium Cell 511 only Standard Insert Slim Cell Holder Blank Insert Insert without pockets for local machining Special Insert Contact Isotech with your requirements Adjustable Equalising Block 511 Metal Block Insert 511 06 01 511 06 02 UKAS Calibration UKAS Calibration available to Order 511 06 03 Standard Probe 935 14 95 Platinum Resistance Thermometer for use up to 650 C 511 06 04 Carrying Case 931 22 58 Sturdy case accommodates the unit 510 Blackbody Kit 510 06 05 Includes a Blackbody with room for accessories target and Sensor Includes a Blackbody target
9. ISO IEC 17025 2005 This accreditation demo defined scope and the operation of a laboratory quality ISO ILAC IAF Communiqu d The Joint Communique is available on the ILAC resources page The Northern Temper This certificate is issued in accordance with the laboratory a traceability of measurement to recognized national standards recognized national standards laboratories This certificate may laboratory ature Primary Laboratory is the Calibratio ated January 2009 not be reproduced oth ith the reco gnised Inte nstrates technical co manageme ccreditation requirements of and to units of measurement realized at 17401 Gallium Fixed Point Cell er than in full except January 2009 to 26 January 2009 the with compared to one of the Laborat N rnational Standard mpetence for a nt system refer joint website at www ilac org on the publi the United Kingdom Accreditation ational Physical ory Reference oratory is the International Temperature Scale of 1990 cations and n Laboratory of Isothermal Technology Limited Service It provides Laboratory of other the prior written approval of the issuing mm RM SOL UTIONS FOR PRIMARY amp SECONDARY LABORATORIES ISUT CH Furnace Selection Guide Isotech offers the widest range of metrology furnaces for the realisation of ITS 90 Fixed Points All models can give very long plateau in excess of ten hours as suggested in CCT 2000 13
10. Optimal Realization of the Defining Points of the ITS 90 E Dual Furnaces the no compromise choice These furnaces use heatpipes to provide an essentially gradient free environment to melt and freeze the ITS 90 fixed points These furnaces meet all the requirement of CCT 2000 13 and allow a uniformity of lt 10mK over the entire length of the fixed point sample The second independent furnace is used to pre warm and anneal the thermometers being calibrated This concept of heatpipe and second furnace for pre and post conditioning the thermometers in a single apparatus was developed from a concept of Dr Marcarino of IMGC Italy Bl Heat Pipe Furnaces For those laboratories who already have furnaces for pre and post conditioning SPRIs we offer the range of furnaces in single heatpipe only version B Three Zone Furnaces All heatpipes have a limited operating range determined by fluid that flows inside the pipe Furnaces without heatpipes can work over wider temperature ranges Isotech offer two models of Three Zone Furnaces one from 50 C to 700 C and one from 200 C to 1200 C These furnaces use top and bottom guard heaters to minimise temperature gradients and also meet the requirement of Optimal Healizations B Single Zone Furnaces Finally the range includes an economical single zone furnace for Indium Tin and Zinc Cells and an Annealing Furnace for pre and post conditioning thermometers Bi Plateau Leng
11. SECONDARY LABORATORIES 81 Sa ed ITS 90 Isothermal Towers Y ISOTower Bi High accuracy li Fast to temperature WE Simple to use The most accurately defined temperatures are those defining points fixed points of ITS 90 The leading Primary Laboratories use large fixed point cells in deep calibration furnaces that utilise Heat Pipes to eliminate temperature gradients This combination of cell and furnace gives the smallest of uncertainties In Isothermal Towers the fixed point cell and heat pipe or heat siphon have been combined patent applied for to produce the ideal realisations for calibrating standard thermometers Thermometers can only be calibrated accurately if they are immersed sufficiently In Isothermal Towers a heated block Immersion Compensator patent applied for sits on top the heat siphon cell to fully compensate for the immersion characteristics of the unit under test The Isothermal Towers performance has been fully evaluated against the most detailed and demanding requirements ever written CCT 2000 13 All Isothermal Towers Indium Tin Zinc and Aluminium meet all the requirements of CCT 2000 13 allowing Isothermal Towers are simple to use and very robust laboratories to realise the smallest uncertainties at a Operation is risk free as a combined apparatus there Is fraction of the cost of conventional Metrology Furnaces no need to handle a fragile cell No need for specialis
12. SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES Working SPRIs 909 Family Model RTPw Nominal Resistance Recommended Max Current mA Nominal Sensitivity Resistance Ratio Self heating Stability Internal leads External Leads How to Order 909 25 50 25 5Q at 0 C 10100 1000 1 0 5 0 1 O C 0 4 O PC Wga gt 1 11807 as required by ITS 90 1mK 25 microwatts Depends upon the temperature range of use Typical annual stability see the table on the next page 4 wire platinum Silver plated multi strand wires in a low loss insulation cable terminating in gold plated terminals Model 909 Specify model resistance and length State with UKAS Calibration or without UKAS Calibration at Fixed Points or by Comparison Note SPRT Calibration with ITS 90 Fixed Points Standard Service ISOTECH UKAS Calibration Uncertainties k 2 Suitable for Isotech 909 Family of SPRTs Fixed Point BP Nitrogen TP Mercury TP Water MP Gallium FP Indium FP Tin FP Zinc FP Aluminium C 195 798 38 8344 0 01 29 7646 156 5985 231 928 419 527 660 323 TP Triple Point FP Freezing Point Range 1 Range Range 2 3 Typical Uncertainties 10mK 2mK 1mK 10mK 2mK 1mK 3mK 3 5mK 3mK MP Melting Point BP Boiling Point 3 5mK 3 5mK The latest schedule can be found on the Isotech website or at www ukas org Note The 1000 909 has a maximum temperature of 550 C an
13. SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES and 8mm diameter Fixed Point Cells Mercury Triple Point Cell 38 8344 C Water Triple Point Cell 0 01 C Gallium Melt Point Cell 29 7646 C Slim Gallium Melt Point Cell 29 7646 C 17401M 17668ML Indium Freeze Point Cell 156 5985 C otirred Ice Water Bath d 813 ll 350mm Immersion Depth li 8 Capacity BI 0 C created by stirred ice water mixture The most used temperature for calibration is 0 C The normal way of creating 0 C is via a mixture of ice and water in a Dewar Flask However this can give errors of up to 4 C because water is densest at 4 C and so as the ice melts the temperatures at the bottom of the flask can rise to 4 C In the design of the ice flask offered by Isothermal Technology Ltd these problems have been eliminated by stirring the water ice mixture and segregating the ice from the water in the measuring zone This stirred ice water bath is designed and built according to National Laboratory recommendations Using demineralised water accuracies of 0 005K are obtainable Typically the bath will last for 4 hours before recharging with ice The ice is contained around and below the compartment where up to 4 probes can be placed for calibration or referencing purposes An option permits a water triple point cell to be maintained Model 813 within the stirred ice bath KETENE 0 C 0 005K Demineralised
14. being used as the reference and simultaneous ratios of SPRT and unknown thermometers are being recorded with a bridge such as the Isotech microK Liquid Nitrogen is not supplied with the apparatus SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES Simple Liquid Ne Apparatus Model 461 Lid Liquid Nitrogen Stainless Steel Dewar Flask Equalizing Block Model Temperature Range Uncertainty Power Dewar Dimensions Thermometer wells How to order 461 Simple Liquid Nitrogen Apparatus 196 C Nominal 0 002 C The temperature distribution across the block is typically 2mK To this must be added the uncertainty issued with the calibration certificate from the National Laboratory Extra uncertainties will also exist if dissimilar probes are compared NA Inside diameter 100mm Depth 280mm Volume 3 litres Four 8mm as standard others to special orders 461 Simple Liquid N2 Apparatus Cryostat Model 459 80 to 180 C d ll Extreme Low Temperature Calibration li High Stability When we considered low temperature comparison calibration we had to take into account Health and Safety considerations both of the liquids used in compressors to generate low temperatures and also the liquids used in the calibration volume itself The cost of chillers increases considerably for very low temperatures We concluded that using chillers for very
15. many months with occasional attention so that this fundamental fixed point of thermometry is continuously available The Bath ensures total safety of the cells with dual electrical safety circuits and the passive safety of the design see below The Isotech Model 18233 Water Iriple Point Maintenance Bath is not an adaptation of general purpose commercial equipment but is specifically designed to maintain and safeguard 1 to 4 Water Triple Point Cells for the calibration of thermometers on the International Temperature Scale of 1990 It will ensure the integrity of the cells against catastrophic freezing which can break the glass envelope The case of the bath is made of special quality double skinned laminated wood for best thermal resistance and stability Cooling is accomplished by efficient solid state Peltier chilling modules powered so that the rate of temperature change is very small Solid state cooling ensures minimal power consumption silent operation and no vibration Model ITL M 18233 Two safety circuits are provided to prevent cell breakage by a ue onion The ae can be set toa Temperature Range 0 01 C 0 3 C resolution of better than 0 001 C If control fails in such a Accuracy 0 001 C mode that the Peltier chillers are full on a warning light is lit 0 0001 C in Cell to give the operator 20 minutes in which to take appropriate action If no action is taken the apparatus is automatically Ambient Limits 1
16. 0 4m4A eliminates thermal EMFs E Surface mount construction ensures long term reliability Model Inputs Measuring Current Self Heating Test Current Measuring Time Measuring Range Resolution Uncertainty of Measurement Reference Resistor Interface Ambient Temp Range Power Supply Case Dimensions IE en True Temperature Indicator Simple to use High Accuracy High Resolution TTI 22 2 channel Pt100 BS EN 60751 IEC 751 or 25 5 100Q SPRT to ITS 90 0 41mA 0 29mA 0 41mA v2 1 44 seconds for both channels 250 to 960 C 0 to 440 Ohm Temperature 0 0001 C 0 1mK Resistance 0 00004Q 40 uQ Temperature 0 001 C 1mK 100 Ohm PRT Resistance 0 4mO 20 C Instrument only uncertainty with sensor dependant on range and sensor type Internal 3800 TCR 0 3ppm C Stability 5ppm year RS232 Ethernet built in web server provides simple temperature display 10 C to 30 C 7 5VDC 250mA power adaptor or 2 x AA batteries typically gt 10 hours operating time Width 190mm Height 112mm Depth 240mm Weight 1 8kg 46 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES The TTl 22 continually compares the connected sensor to a highly stable precision internal reference resistor For a Pt100 at 0 C the annual stability for absolute measurement is typically 1 3mK bppm x 100Q 0 5mQ 1 3mk For comparison calibration when a reference probe
17. 270 100 B8 30 130 8 30 160 130 0 B12 40 210 12 40 290 210 75 B12 46 210 12 46 290 210 75 B11 50 270 11 50 350 270 B11 65 270 11 65 350 270 B13 65 270 13 65 350 270 B16 65 270 16 65 350 270 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES Type B cells were designed at NRC of Canada The thermometer well extends 100mm above the top of the cell Heat transfer to the ice mantle may be essentially eliminated by keeping these cells packed in ice to the top of the well extension or by immersing them sufficiently in a Water Triple Point Maintenance Bath E Comments Highly recommended 1 2 1 Isotopic Analysis Large re entrant tube 1 eedem Slim Cell Fits Isotech Dry Blocks Replacement for NPL UK Type 32 Cells Recommended for Isotech Oceanus 2 Available in Quartz Glass Highly recommended 1 2 NRCC s favourite Cell 1 2 Large re entrant tube 1 Larger re entrant tube 1 a a aG T Maintenance Bath Water Triple Point l l No Ice required Automatic Vibration free The Isotech 18233 Water Triple Point Maintenance Bath is deb noise free Solid state cooling widely used by the worlds leading NMIs In a recent Double safety circuits International study cells from 21 of the worlds leading laboratories were inter compared the study used two Isotech 18233 Baths to maintain the cells during the inter comparisons It will maintain the water triple point for long periods of time
18. 40 C C10 Oil 125 C Vertical Uniformity 0 005 C 0 005 C 0 007 C Methanol 0 C Methanol 0 C C10 Oil 125 C Heating time 25 C to 125 C lt 50 mins C10 Oil 30 C to 300 C lt 120 mins VH Oil Cooling time 0 C to 80 C lt 240 mins 10 C to 40 C lt 180 mins Methanol Methanol Communications Includes Serial Interface PC Cable and Software Dimensions 485mm wide 525mm deep 1150mm high Weight 68kg Safety Compliant to CE Regulations Power 1kW 108 130 or 208 240V 50 60Hz How to Order 796M Refer to Evaluation Report for Full Details Accessories Thermometers A monocular is available to aid reading The Orion can be supplied with both copper and the scale of a L LG Thermometer aluminium equalising blocks Aluminium is recommended The liquid level is typically within only 10mm of the lid so for use only with oils Copper with it s better corrosion complicated fluid level adaptors are not essential resistance is recommended for oils alcohol and water There are a range of supports to hold various fixed point Refer to Liquid Selection Guide on page 73 for cells Slim and Optimal allowing the bath to realise ITS 90 information on liquids and important Health and Safety fixed point cells to sub mK uncertainties Information The standard probe holder can support f IDs Weieceouples eral a TS Glee Isotech has a full range of fixed point cells for more details visit our
19. 410 02 18 17702W 125 C 250 C Water In and Sn Heatpipe Only 410 02 18 17706 400 C 1000 C Potassium Zn Al Ag Included 420 02 15 17702P 400 C 1000 C Potassium Zn Al Ag Heatpipe Only 420 02 15 17705 500 C 1090 C Sodium Al Ag Cu Included 420 02 15 17702S 500 C 1090 C Sodium Al Ag Cu Heatpipe Only 420 02 15 Uncertainty lt 1mk with cells PC Interface Included as standard Uniformity lt 10mk over length of fixed point sample Resolution 0 1 Over Whole Range Control 0 1 C Resolution Core Size 52 x 432mm Communications Included as standard Dimensions Height 960mm Width 600mm Depth 560mm Weight Dual 119kg Heatpipe 115kg SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 23 E Furnaces a Low Temperature Fixed Points of l Indium 156 5985 C Tin E Single Zone 231 928 C and Zinc E Aluminium Alloy Block 419 527 C 6 to 12 Hours Plateau Annealing Adaptor Bl Six to 12 Hour Plateau Active and Passive Safety Circuits The Isotech Low Temperature Fixed Point Furnace is designed specifically to realize and maintain the freeze plateaux of Isotech Indium Tin and Zinc Fixed Point Cells for calibration of thermometers on the International Temperature Scale of 1990 The Low Temperature Furnace is a single zone furnace The recommended procedure for establishing a freeze plateau requires operator attention until the plateau is realized Following that the Model 17701 Furnace will maintain the i
20. 456 E Nominal Temperature Coefficient of Resistance 0 02ppm C with temperature control on 18 to 25 C lI Power Rating 0 5 Watt at 25 C W Resistance Tolerance Initial Resistance Accuracy 0 00576 B Standard models 10 25 100 1000 and 10 0000 E Current Noise 0 010uV RMS Volt of Applied Voltage E Thermal EMF 0 1uV C Max 0 05uV C Typical WE Ihe most precise and stable resistors available W Impervious to harmful environments oil filled By temperature controlling an otherwise very stable resistor a performance close to the very best available World wide can be achieved at a surprisingly low price The resistor itself is oil filled and hermetically sealed The function of hermetic sealing is to eliminate the ingress of moisture and oxygen both of which play a role in the long term degradation of unsealed resistors A further enhancement in both short and long term stability Model 456 is achieved by oil filling The oil also acts as a thermal Rating 0 5 Watt conductor allowing the device to accept short periods of Stability Typically 1ppm per year at 1mA overload without degradation Traceability A Traceable Certificate accompanies your 456 to the 2 sigma uncertainties shown With accuracies of 0 005 a wide resistance range Induction 0 08uH typical and long term drift of less than 5ppm these devices are Capacitance 0 5pF virtually secondary standards that can be kept in a Dimens
21. and 0 05 C from 400 C to 1000 C using the fixed points of Zinc Aluminium and Silver These calibrations are performed by NPL who established the world first ISO 17025 UKAS accredited calibration services using metal carbon eutectic fixed point cells www npl co uk temperature humidity l Itt www isotect 1 cO UK Thermocouple Standards al Platinum Palladium O to 1500 C lll Superior stability to Platinum Platinum Rhodium WE Very Low Uncertainties ll Use to 1500 C These Platinum Palladium Thermocouples Pt Pd are manufactured by the National Physical Laboratory NPL N PL 3 who have developed a novel physical mechanism which N mitigates the mechanical jioni stresses caused by the different thermal expansion of Pt and Pd wires This dispenses with the fragile coil conventionally used with this type of thermocouple Platinum Palladium thermocouples are more costly than Platinum Platinum Rhodium types but benefit from superior performance both in terms of stability less de calibration and accuracy Gold Platinum Thermocouples Au Pt offer the best performance but are limited to a maximum temperature of 1000 C These Pt Pd thermocouples offer lower drift than Platinum Platinum Rhodium Pt Pt Rh and with higher operating temperatures than Au Pt They are suitable for a range of applications including transfer standards In addition to developing the novel structural des
22. and Sensor Includes an insert and angled thermocouple 511 Blackbody Kit 511 06 05 510 Surface Sensor Kit 510 06 06 510 Medusa Performance Calibration and Uncertainty A certificate traceable to National Standards is included as standard Recommended is an optional UKAS five point calibration The accuracy of the Medusa will depend very much on the mode of use see the Uncertainty Graph for typical uncertainties NTPL calculate the uncertainties to UKAS requirements The Medusa meets the Calibration Capacity requirements of EA 10 13 EA Guidelines on the Calibration of Temperature Block Calibrators A A A A 200 300 400 500 600 C Model 510 MEDUSA 30 C to 550 C 511 MEDUSA 3 50 C to 700 C AO F K 108 to 130V or 208 to 240V 50 60Hz 510 1000 Watts Overall dimensions Height 430mm Width 310mm Depth 300mm Weight 510 17kg Indicator units Temperature Power Range Metal Block Bath Blackbody Source Surface Sensor Calibrator ITS 90 Fixed Point Computer Interface Included with Software 550 C to 30 C in 5 hours 30 C to 550 C in 90 minutes Refer to Uncertainties Graph 0 03 C 101C OG 0 001 C Absolute stability i 511 1800 Watts over 30 minutes 511 25kg Cools from Heats from How to Order 510 Medusa or 511 Medusa Please specify model type voltage and options required Uncertainties Calibration volume 45mm diameter by 285mm deep Standard Insert
23. at 20 C time to plateau 4 Confidence is a major requirement in a standard The is 1 hour maximum Recycling Isothermal Gallium Cell and Apparatus have a long 20 including freezing the cell is year history and have been successfully used in most typically 3 to 4 hours National and Primary Laboratories world wide This is one of the main reasons for choosing the Isothermal Cell and Apparatus Plateau Duration Not less than 12 hours under specified ambient conditions 16 hours typical 5 The Cell and Apparatus are manufactured to the strict 75 Watts typical 100 130 or requirements of BS 5750 and ISO 9000 Each finished 208 240Vac 50 60Hz unit becomes part of the Isotech UKAS working Field Changeable Calibration Laboratory for two weeks or more during Dimensions Height 429mm which use the control circuits are set and checked for Width 259mm optimum performance It is released only when Isotech Depth 181mm is entirely satisfied with its performance Weight 8 4kg How to order Model ITL M 17402B Gallium Apparatus without cell Please specify voltage required Model ITL M 17401 Gallium Cell SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 13 lt a oe ea Tne Isotech Mercury Cell 38 8344 C lil Uncertainty 0 000220 C E Rugged Stainless Steel Construction E N Pure The Isotech Mercury Cell is constructed in a rugged sealed stainless steel enclosure allowing the triple point of 38 8344 C t
24. at 650 C for a few hours and then cooling slowly overnight to 450 C Long term drift Most changes occur during heating and cooling If this process is done carefully long term stabilities of a few mK per year can be expected with reproducibility at the silver point of 3 to 5 mK How to order Model 96178 0 25 State with UKAS calibration or without UKAS calibration Refer to introduction for Calibration Uncertainties 32 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES Isotech Note Why choose 0 250 for HTSPRTs Note1 It is necessary to make the former on which the platinum is wound of high purity quartz Even quartz does not provide absolute isolation at the high temperature end of the range The former or mandrel is thus a shunt resistance across the platinum winding and because of the uncertainty of the contacts between platinum and quartz it is uncertain and unstable in magnitude The practical solution is to reduce the element resistance so that the shunt resistance produces a smaller network effect For example for a 25 50 thermometer suppose that the shunt resistance were 20 MO Then the network resistance is 25 499967Q But we require measurement assurance of better than 1 part per million so this won t do even if the shunt were a constant calibratable value which it is not For a 0 250 thermometer a 20 MO shunt gives a network resistance of 0 249999970 which is tolerable The cost and
25. be individually programmed Zero Current Resistance The microK was the first Bridge to have the ability to automatically compute and display the zero current resistance with no manual correction this feature is available on the microK 70 and 125 models Low Noise The new ADC together with the low noise pre amplifiers used in the microK means you achieve a lower measurement uncertainty in a shorter time Parallel Processing Technology The microK 70 and 125 incorporate additional technology compared to the micro 250 and 500 to deliver superior performance for the Primary Laboratory A new technique of Analogue Parallel Processing is used to lower noise to a level that previously could only be achieved by the best AC Bridges These models also feature an Ethernet port Learn more Download the 12 page brochure at www isotech co uk microk microK with microsKanner SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 43 ISUT CH microK Universal Specifications Accuracy Thermocouples Measurement Time Per Channel Temperature Conversions Cable Length Input Connectors Interfaces Ratio Range Display Channels Voltage uncertainty Range 0 20mV 250nV Equivalent to 0 01 C for Gold Platinum thermocouples at 1000 C Resistance 2s 1s using the RS232 or GPIB interface Voltage 1s 0 5s using the RS232 or GPIB interface PRTs ITS 90 Callendar van Dusen Thermocouples IEC5
26. for superior temperature uniformity Like other Isotech liquid baths the calibration volume is cylindrical to suit thermometers not a large square tank The bath is filled with just 5 litres of liquid reducing filling and ongoing cost of ownership as liquids are replenished The 798H and 798EHT feature a cooling coil which can be attached to an external source of either cold water or gas to further reduce cool down times Hydra benefits from Isotech s experience it drains faster Is easier to use is safer and is more convenient Accessories allow a wide range of thermometers for example to be readily clamped by the Sensor Support and ITS 90 fixed points cells are accommodated with the adjustable cell holder 70 W Parallel Tube Action Liquid flows up the rear volume of the bath and down the working volume This action creates very small vertical and axial gradients This gives the smallest overall uncertainties E Heating All heating is outside the container By using a large area nickel foil heater the complete bath wall is heated uniformly ll Fast Cool Down The Hydra cools from ambient to 80 C in just 180 minutes ll Cooling The cooling is built in and also surrounds the calibration volume creating a low temperature ambient in which the heater can function efficiently E Wider Temperature Range A unique cooling system cools the unit as well as enabling the bath to heat up to 125 C 121 C is a ke
27. integrated devices providing optimal performance There are also ranges of apparatus that can accept a range of cells see table opposite These models can also be used without cells including use as Dry Blocks Temperature C 189 3442 38 8344 0 010 29 7646 156 5985 231 928 419 527 660 323 961 78 80 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES for immersion depths of up to 300mm ideal for larger sensors Patents applied for ISUT CH The ITS 90 Cell needs equipment in order to melt freeze or maintain it Many combinations of Isotech equipment can be used liquid baths dry blocks and furnaces Equipment Isotech have a range of Dry Blocks that allow the fixed points to be easily realized at an affordable price The combination allows you to calibrate at a Point On The Temperature Scale hence the name POTTS Point Temperature Suitable Apparatus Mercury 38 8344 C Europa s B8 Water Triple Point 0 01 C Europa Venus B12 Water Triple Point 0 01 C Oceanus ey Gallium 29 7646 C Europa Venus Calisto Indium 156 5985 C Medusa 510 Medusa 511 ISOTower 490 Tin 213 928 C Medusa 510 Medusa 511 ISOTower 491 Zinc 419 527 C Medusa 510 Medusa 511 ISOTower 492 Aluminium 660 323 C Medusa 510 Medusa 511 ISOTower 493 Silver 961 78 C Oberon Copper 1084 62 C Oberon zi ISOTowers are intergrated devices including the ITS 90 Fixed Point Cell SOLUTIONS FOR PRIMARY amp
28. is compared to a calibrated standard the long term stability is not important as any change of value is cancelled in the comparison The temperature coefficient is O 3ppm C and the measuring time for both channels is just 1 44 seconds The instrument can be configured to measure ratio of the measured resistance of the two input channels a technique familiar to users of older style thermometry bridges The overall uncertainty of the instrument and probe together will be determined by the model of probe and the temperature range For the majority of applications the contribution of the instrument uncertainty will be negligible compared to the uncertainty of the calibrated probe Hecommended probes include the Isotech 909 100 and 670SQ 100 935 14 16 935 14 95L and H The TTI 22 includes Cal Notepad software for easy monitoring and logging of data It is fully compatible with Isotech I Cal Easy which can automate comparison calibration SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 47 270 to 1820 C d lI Wide Range of Sensors SPRTs PRTs Thermistors Thermocouple and 4 20mA WE High Accuracy lt 5ppm for PRTs 2uV for Thermocouples and 1uA Transmitters WE Logs Controls Isotech Temperature Sources Massive logging capacity controls Dry Blocks and Liquid Baths The millik Precision Thermometer from Isotech sets a new standard for the high accuracy measurement and
29. measurements were made with Homogeneity 0 005 C two model 670 thermometers pocket to pocket Method Vertical Profile 0 005 C at 80 C over bottom 50mm 0 01 C at 150 C The Cryostat is connected to a vacuum pump It is pumped for five minutes and then sealed The Cryostat Immersion Depth 560mm is connected to the controller switched on to check the Neck Diameter 120mm connections The Cryostat is then lowered into the aT IV container of liquid nitrogen which should come between uU sitios pts SI SEU 25mm and 75mm below the flange Three thermometer Nitrogen Capacity 35 litres tubes exit the Cryostat and have nylon compression fittings The standard PRT and unknown thermometers How to Order to be calibrated are lowered into the wells and the nylon 459 Cryostat fittings are hand tightened until the nylon grips the Accessories thermometer without damage The controller is set to the 459 01 01 Hand Vacuum Pump required temperature and the Cryostat left to stabilize 459 01 02 Electric Vacuum Pump 459 01 03 35 Litre Cryostat Container 459 01 04 25 Litre Container for topping up before comparison readings are made SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 61 62 100 to 40 C d M 20 000 hours testing equal to 10 years use E Minimum Temperature 100 C 148 F E No expensive liquids The Isis Dry Block offers operation to temperatures as low as 100 C and is the only block bath working to such a low
30. the Platinum by having a coil of platinum bridge the two thermo elements at their measuring le 2400mm junction 4 There are no joins between the measuring and 6 The reference junction needs to be placed in an accurate reference junctions reference system such as a Water Triple Point Cell or an T Isotech ice point reference 5 The reference junction is also researched and we use P thermally pure copper wire of selected diameter which 7 An article describing in detail the construction handling has been pre annealed in inert gas to maintain the and operation of the thermocouple is provided free with accuracy of the measuring junction each unit Temperature Range 0 C to 1000 C Dimensions Refer to diagram Sheath materials Carrying Case Included as standard Measuring Junction Quartz Reference Junction Stainless Steel Thermo element Purities Platinum 99 999 Pure Gold 99 999 Pure Model type Au Pt Thermocouple Calibration Isotech Traceable Including emf vs temperature traceable calibration Options Calibration at Zinc certificate and carrying case How to order Aluminium and Silver Fixed Points NPL Fixed Point Calibration Calibrated at Fixed Points of Zn Al and Ag UKAS Uncertainty 0 400 C 0 07 C 400 1000 C 0 05 C SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 39 ISUT CH Precision hermometry Bridges Isotech have a range of innovative precision thermometers to match the calibra
31. there is a cost is increased difficulty on the electrical measurement side particularly in the face of noise which is present at high temperatures 650 00 Note2 Gases like Iron Chromium Nickel under reducing conditions can penetrate the quartz sheath and poison the platinum It is necessary to purchase not only the 96178 but items such as the Dual Furnace to ensure that your high temperature thermometer does not become contaminated Only Isotech offers a comprehensive solution to the measurement and use High Temperature Thermometry Note3 Our know how and expertise in the field of High Temperature Thermometry has been written down and is available in the Isotech Journal of Thermometry 90 00 3 EEE EEE EEE EEE EEE VIJITI TIIT i ULTRA PURE QUARTZ SHEATH ee DISC QUARTZ SPADE ASSEMBLY tom A LLL SENSOR HANDLE STRAIN RELIEF BLACK SHRINK SLEEVE NUM m 2 5 METRES OF CABLE SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 33 196 to 670 C d B Three Stem Lengths E Wide Operating Range E Proven Design This economically priced Standard Platinum Resistance Thermometer Model 909 is the workhorse of calibration laboratories all over the world During 2007 we reviewed our range of SPRTs and now have new models in the 909 family the 909L and 909H The wide temperatur
32. unsubstantiated claims by our own scientists although they are as good as the best you will find the results of independent international intercomparisons done by such organisations as BIPM and NIST Where we have to summarise we provide references to the appropriate document for you to download and read in full Our uncertainties of calibration and procedures have all been scrutinised and agreed with UKAS who are party to the ILAC MRA Each year we are audited by UKAS who check our electrical and thermal standards examine and witness our procedures and question our uncertainty spread sheets This ensures a continuous improvement in our services to you our customer Our electrical standards are certified by NPL the UK s National Laboratory Our fixed points from argon through to silver have been intercompared at NIST in the US to their references Our UKAS certificates are presented in a form which makes them instantly useful Our staff of experts are available to help with your enquiries and problems Selecting the best equipment for a Primary Temperature Laboratory The Purpose The purpose of a primary laboratory realising part of ITS 90 is to calibrate SPRIs at fixed temperatures by comparing their resistance to a fixed and known resistance Uncertainty Limits For fixed resistors the limit is about 0 05ppm For 6N purity metallic cells the limits are ref CCT 2000 13 p 5 Hg 0 2mK Ga 0 1
33. will give larger gradients as will larger numbers of tubes The precision of this furnace has previously been achieved only by using heat pipes Because of the design the price is only one half to one third that of a bath with comparable accuracy and much smaller capacity of calibration The use of newly developed modern ceramic materials has enabled high accuracy low mass and high stability to be obtained The Saturn system will not contaminate your thermocouples unlike some furnaces that have metal equalizing blocks Model 877 Model Temperature Range 100 C to 1300 C Number of 8 as standard Calibration Points 16 to special requirements Diameter of Sensors 4x 6mm 4 x 8mm Depth of immersion 180mm Accuracy 0 25 C to 0 1 C at 1000 C using comparison techniques Warm up times 1 hour to 700 C 3 hours to 1300 C Stabilisation time 1 hour to 0 25 C Communications Supplied as standard with serial interface PC adaptor cable and Cal NotePad Power 3kW 208 240Vac 50 60Hz 3kW 115Vac 50 60Hz Dimensions 425 mm Diameter Weight 25 kgs These times may increase as the windings age or if the supply voltage is low Accessories 877 01 Equalising Block 4 x 8mm 4 x 6mm i d standard 877 015 Equalising Block 16 x 6mm special 877 01E Equalising Block Other configurations consult Isotech 877 02 Platinum Foil Temperature Barrier How to Order 877 Thermocouple Calibration Facility including
34. 1 ISOT CH The Source for Calibration Professionals SS ee Solutions for Primary amp Secondary Laboratories Temperature Calibration Equipment amp Services ipia Gald Phib Tirma Copper Freeze Point Cells Silver Freeze Aluminium Freeze iiag Point Cells LARE Fins Tin Freeze Standard Platinur Ko amp 67i Point Cells Temperature Cell amp Apparatus Cell amp Apparatus Cell amp Apparatus dare Platinum Resstance Thermometer Boiling Point Comparator for b Argon Nitrogen or Oxygen Isotech Metrology Furnaces i r dh Point Cells Point Cells Zinc Freeze Point Cells gt Indium Freeze Gallium Melt Point P Triple Point Water p Mercury Triple Point ITS 90 Temperature Scale 1084 62 C COPPER FREEZES 1064 180 C GOLD FREEZES 961 7800 C 660 3230 C i 419 5270 C a 231 9280 C 4 156 5985 C i 29 76460 C 3 0 010000 C i 38 83440 C 189 3442 C TRIPLE POINT OF ARGON 218 7916 C TRIPLE POINT OF OXYGEN 248 5939 C TRIPLE POINT OF NEON 259 3467 C TRIPLE POINT OF HYDROGEN 273 1500 C ABSOLUTE ZERO METROLOGY INSTRUMENTS is Required calibration point for range m 1TS 90 x ee Acceptable Thermometer Ranges For full details contact Isothermal Technology Limited Pine Grove Southport Merseyside PR9 9AG England Telephone
35. 240VAC 50 60Hz Dimensions Height 322mm Width 176mm Depth 262mm Weight 14kg How to order 520 Europa 6 POTTS Please specify voltage required 88 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES Slim Gallium Cell EUROPA 6 Heat Up Cool Down GRAPH with insert fitted 80 o Vit tt LL LLLL eJ LL LL LLLI i LLL LL eT tt AHHH OR EE NNNM 0 10 20 n 50 60 Time eR Temperature C Accessories Metal Block Bath Standard Insert 2 x 4 5 mm 2 x 6 4 mm 1 x 8 mm and 1 x 9 5 mm holes x 155 mm deep Non standard Insert please consult Isotech Stirred Liquid Bath Stirred Liquid Container For alcohols water amp oil C10 Oil 85 C 140 C 0 1 litre required Liquid in Glass Thermometer Support kit Stirred Ice Water Bath Stirred Liquid Container For alcohols water amp oil Liquid in Glass Thermometer Support kit Blackbody Source Blackbody Target Surface Sensor Calibrator Surface Sensor Calibrator Kit ITS 90 Fixed Point ITL M 17724M Slim Triple Point of Mercury Cell ITL M 17401M Slim Gallium Melting Point Cell B8 Slim Triple Point of Water Cell Semi Standard Probe 935 14 82 Carrying Case 931 22 64 UKAS 5 Point Comparison Calibration SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 89 POTTS d Oceanus 6 Automated Calibration using Fixed Point Cells B Use with Water and Gallium Fixed Points Temperature range 45 C below ambient to 110 C Calibrate absolut
36. 2mK How to order ITL M 17724 Mercury Cell The Cell is supplied with a Certifcate of Metal Purity We have a choice of UKAS calibration Services the stated uncertainty figure is for our Premium UKAS Calibration Service 14 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES a ei eee ee es Suc Apparatus al Mercury Triple Point 36 to 42 C E Purpose Designed for Isotech Mercury Cell lil Outstanding Convenience and Safety B Liquid Free The Isotech Model ITL M 17725 Cryostat is a self contained mechanically refrigerated system with a main well to house one cell and two auxiliary wells for pre chilling of thermometers The cryostat temperature is steplessly adjustable from 36 C to 42 C with scale divisions of 0 1 C interpolation possible and 24 hour stability better than 0 05 C measured by an SPRT in the well of a Mercury Cell inside the Cryostat The cryostat has several unique features providing outstanding convenience and safety The refrigeration system has sufficient capacity to bring a cell to operating temperature in about one hour At operating temperature the cooling rate is about 1 Kelvin minute and the heating rate is about 2 Kelvin minute This permits rapid changes to be imposed on the temperature of the cell environment to a void excessive demands on the low heat of fusion energy of the mercury within the cell In addition all temperature control is accomplished through co
37. 344 C Water Triple Point Cell 0 01 C Gallium Melt Point Cell 29 7646 C 17401M Slim Gallium Melt Point Cell 29 7646 C 17668ML Indium Freeze Point Cell 156 5985 C SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 69 Stirred Liquid Baths 80 to 300 C d ll Four Models 80 C to 300 C W Stability 0 01 C ll Excellent Uniformity Hydra 798 Precision calibration of thermometers calls for the use of stirred liquid calibration baths The Hydra models set new standards in terms of price to performance ratio Now Calibration Engineers and Metrologists can choose from a range of baths that offer good immersion depth parallel tube action giving the best uniformity and smallest calibration uncertainties and wide temperature ranges Hydra offers these features in a new price class don t settle for a bath with shallow immersion or simple stirred action when with these Isotech baths provide good depth of immersion and good temperature uniformity along with the other benefits Isotech baths offer The immersion depth of 300mm allows the requirements of Supplementary Information to the ITS 90 to be met This publication from BIPM recommends immersion depths of 15 to 20cm from 50 C to 50 C and from 20 to 27cm at 200 C Many baths in this price range are simply not deep enough to meet this requirement Rather than simply stirring a square tank of liquid the Hydra uses parallel tube action
38. 4 Annealing Furnace Communications Included as standard Power 110VAC 50 60Hz 3kw or 230VAC 50 60Hz 3kw with internal transformer option SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 27 ISUT CH Introduction to SPRIs and standard Thermocouples The ITS 90 specifies the use of platinum resistance 909 Family thermometers over the range 259 C to 962 C Working Standards The 909 Range In addition to our popular quartz sheathed 909 SPRT covering the temperature range 200 C to 670 C Isotech have introduced two new metal sheathed versions for 2007 The 909H works from 80 C to 670 C and can be provided with either 25 5 Ohm or 100 Ohm Ro to ITS 90 The 909L works from 200 C to 165 C and also is available with Ro 25 5 or 100 Ohms to ITS 90 Between the triple point of equilibrium hydrogen 13 8033 K and the freezing point of silver 961 78 C T IS defined l hermometers by means of platinum resistance i ammo calibrated at specified sets of defining fixed points and using specified interpolation procedures And UKAS Calibration Options All of the SPRTs described on this datasheet can be accompanied by one of three UKAS Calibration options 1 By comparison accuracies of just a few milliKelvins ideal for the 95 Range 2 Standard Fixed Point Calibration suitable for most oPHISs including the 909 Range 3 Premium Fixed Point Calibration suitable only for most stable SPRTs such a
39. 5985 C 1 0mK FP Tin 231 928 C 1 0mK FP Zinc 419 527 C 1 2mK FP Aluminium 660 323 C 2 0mK FP Silver 961 78 C 7mK Calibration of ITS 90 Fixed Point Cells Temperature Uncertainty TP Mercury 38 8344 C 0 22mK TP Water 0 01 C 0 07mK MP Gallium 29 7646 C 0 07mK FP Indium 156 5985 C 0 65mK FP Tin 231 928 C 0 6mK FP Zinc 419 527 C 0 9mK FP Aluminium 660 323 C 1 1mK FP Silver 961 78 C 2 0mK The latest schedule can be found on the lsotech website or at www ukas org Training Our training course From Industry to ITS 90 has been attended by several hundred delegates at venues across the world Many more have completed the content via our E Learning system We also provide specialist courses relating to the use of Primary Standards Journal of Thermometry Published over ten years this remains a valuable resource for temperature metrologists SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 101 mE Source for Calibration Professionals Telephone 44 0 1704 543830 y Fax 44 0 1704 544799 Email info isotech co uk T m gim E m a E Isothermal Technology Limited mee yu Pine Grove Southport Merseyside PR9 9AG England rin E m n www isotech co uk Edition 5 3812
40. 8 C to 28 C switched off and the cells are allowed to warm slowly Time to temperature na Passive safety is provided by the physics of ice If the Peltier Power 150W typical 100 130 or chillers become too cold the first ice which forms is on the 208 240VAC water tank surfaces directly in contact with the chillers 50 60Hz field changeable effectively inhibiting further rapid transfer of freezing to the Dade Dimensions Height 910mm A specific stirring rate of bath fluid is provided by bubble Width 635mm agitation which prevents the water from stratifying Depth 710mm Weight 66kgs The bath is extensively tested at Isotech for two weeks or more during which use the control and alarm circuits are set Options and checked for optimum performance It is released only Triple Point of Water Cells when Isotech is entirely satisfied with its performance How to order The bath has a long and successful history and is relied on ITL M 18233 Water Triple Point Maintenance Bath by many National Laboratories throughout the world This history of successful use is one of the most important Please specify which type of cells will be used so that reasons for choosing Isotech products we can supply the correct cell holder O O IU SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 9 10 Introduction Are you fed up with cold wet hands and hours of frustration when you produce an ice mantle in your Triple Point Cell Ch
41. 84 1 1995 B E J K N R S T L and gold platinum Thermistors Steinhart Hart Limited to 10O per core and 10nF shunt capacitance equivalent to 100m of RG58 coaxial cable Cable Pod connector accepting 4mm plugs spades or bare wires Contact material gold plated tellurium copper RS232 9600 baud USB 1 1 host IEEE 488 GPIB Unlimited 163mm 6 4 VGA 640 x 480 Colour TFT LCD 3 Cold Junction Mode External and Remote with PRT aa C ro K S es e f cat O a S Specifications are subject to change without prior notice Expandable Probes Supported Units Switching Technology Sensor Current Keep Warm Current Internal Data Storage Operating Conditions Supply Size WxDxH Add up to 90 expansion channels PRI s Thermistors amp Thermocouples Ratio V Q C F K Solid state 0 10mA in 3 Ranges 0 0 1mA 20 496 Value 70nA Resolution 28 nA 0 1 1mA 20 496 Value 0 7UA Resolution 280nA 1 10mA 0 4 Value 7UA Resolution 2 8 WA Adjustable 0 10mA Each Channel Adjustable 0 10mA 0 4 Value 7uA Resolution 2 8 WA 2Gb For gt 4 years storage Timed Stamped Measurements For Full Specification 15 30 C 10 8096 RH Operational 0 40 C 0 9596 RH 88 264 Vac 47 63Hz 520mm x 166mm x 300mm 20 5 x 6 6 x 11 9 19 Rack Mountable EF a z ET Parameter microK 70 microK 125 microK 250 microK 500 Accuracy Whole Range SPR
42. 870mm to Top Panel 59kg 46kg 33kg 33kg Compliant to CE Regulations 2 5kW 1 5kW 800W 800W 110V 50 60Hz or 110V 50 60Hz or 110V 50 60Hz or 110V 50 60Hz or 230V 50 60Hz 230V 50 60Hz 230V 50 60Hz 230V 50 60Hz 798L 798M 798H 798EHT SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES Cool Down Graph Heat Up Graph 125 C gt 125 C gt 100 C gt 100 C gt 75 C gt 75 C gt Q 50 C gt O 50 C Lu Lu c 25 C gt 25 C gt z z LLI 0 C gt W 0 C gt QA QA E 25 C gt E 25 C gt 50 C gt 50 C gt 75 C gt 75 C gt 100 C gt 5 r NAR A A A A A 0 30 60 90 120 150 180 0 20 40 60 80 100 120 TIME minutes TIME minutes Calibration Area 100mm Accesories Refer to Liquid Selection Guide on page 73 for information on liquids and important Health and Safety Information 798 05 04 Thermometer Support Kit Holds up to 12 sensors between 3mm diameter 798 05 01 Liquid Volume Lid Sensor Holder Included E e Alma ewelning Block e_ gt EE EEE ww Dual Cell Holder 72 798 05 02A 798 05 02B 798 05 02C 798 05 02D 798 05 03 Aluminium Equalizing Block 4 pockets 8mm diameter 160mm deep Copper Equalizing Block 4 pockets 8mm diameter 160mm deep Special Aluminium Equalizing Block To suit customer requirements Special Copper Equalizing Block To suit customer requirements Standard Dual Cell Holder Includes interchangeable OIE o To o6
43. 90 Fixed Point B12 Water Triple Point Cell ITL M 17401 Gallium Melting Point Cell Semi Standard Probe 935 14 85 Carrying Case 931 22 58 UKAS 5 Point Comparison Calibration SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 91 POTTS d 510 Medusa amp 511 Medusa ll High Capacity Deep Block W Use for Comparison and Fixed Point Calibration W Use with very long thermometers Isotech have a wide range of Dry Blocks to suit probes requiring a large immersion depth These products feature large and deep calibration volumes As such they are less portable than the earlier Dry Blocks but have higher capacities and retain outstanding temperature uniformity this uniformity is so good that these larger products are also apparatus for secondary Laboratories to realize the Fixed Points of ITS 90 Medusa 510 has a maximum operating temperature of 550 C The Medusa Model 511 can be used to 700 C and features three zone control In addition to the main heating zone there are additional top and bottom heaters which compensate for the end losses creating a constant temperature zone across the well For Comparison Calibration the Medusa should be used with an insert the standard insert has six 8mm pockets 250mm deep Also available is an insert 44mm diameter x 170mm deep which is suspended from the top of the block so that the height is user adjustable For flexibility the Medusa can also be used with accessories for infrare
44. Apparatus is self contained and refrigerated by liquid nitrogen or liquid argon which must be supplied by the user Either liquid is suitable for the purpose Liquid nitrogen is generally less costly and more readily available than liquid argon The Apparatus does not require electrical power for its operation The Boiling Point Apparatus will maintain the liquid vapour equilibrium of nitrogen 195 798 C or of argon 185 8468 C indefinitely provided boiled off gas is replenished ITS 90 specifies the triple point of argon 189 3442 C as the low end of the long stem Standard Platinum Resistance Thermometer range As a practical matter realization of this triple point is a costly in equipment and time and complicated process Most laboratories will choose to calibrate this end of the platinum range by comparison of the thermometer under test with a thermometer of known calibration National Laboratories themselves will invariably calibrate thermometers submitted to them by comparison realising the actual argon triple point only infrequently for calibration of their own reference thermometers The National Physical Laboratory of England makes this statement Most thermometers Submitted for calibration will involve measurements by comparison with NPL standards in a bath of liquid nitrogen about 196 C Model 18205 Comparator is designed for precisely such comparison calibration It comprises a stainless steel dew
45. C The Model 459 Cryostat employs Liquid Nitrogen to operate over the range 180C to 80C Low Temperature Range 80 C to 250 C Over this range Isotech Stirred Liquid Baths of parallel tube design provide outstanding temperature uniformity with low filling costs Medium Temperature Range 50 C to 700 C The Isotech Fluidized Furnace Model 875 is a concentric tube design that uses safe inert alumina oxide powder in place of oil or dangerous salt mixes and operates up to 700 C without hazard The sealed design ensures no powder loss into the laboratory High Temperature Range 150 C to 1300 C The concentric design of the Isotech 877 Thermocouple Calibration Furnace avoids the large temperature gradients present in simple tube furnaces ISUT CH Isotech baths employ sophisticated designs to ensure calibration to the smallest of uncertainties Parallel Tube Design Here the heating cooling and mixing take place in one of two parallel tubes The second tube is the calibration volume and again the excellent temperature uniformity gives small calibration uncertainties An added benefit of these tube design of bath over large square tank designs is that to fill the bath much less liquid is required For high temperature work it is usual to use Silicone Oils which have both a high cost and finite life Concentric Tube Baths In this design liquid is forced down an
46. CT 2000 13 Large Optimal Cells mK 0 12 0 05 0 2mK 0 1mK 0 5mK 0 17 0 3mK 0 18 0 5mK 0 21 0 7mK 0 66 033 Ag 1 1mK a 6N5 pure With each delivery of metal the supplier furnishes us with a certificate detailing the impurities detected in PPM At Isotech we go one step further samples of the metal are sent to NRCC in Canada who analyse the sample to parts per billion and look for 60 elements rather than the 20 that the supplier analyses This independent analysis increases confidence in the metal of the cell The metal of the cell is contained in a graphite crucible Our graphite is the densest available having an average grain size of just 7 uum No metal has ever penetrated this graphite It is supplied with a purity better than 99 9995 and at Isotech temperature and vacuum processing further reduced the impurities Whether you choose a sealed or resealable cell we need pure argon to surround the cell our argon is 99 999926 pure Before we make cells commercially with a new delivery of metal we make a cell for evaluation It goes through the same 5 step process as is used by National Laboratories for international intercomparisons The cell is melted and frozen three times and the coincidence between melt and freeze point measured The impurities are used to calculate the expected depression of the metal from ITS 90 and the cell is intercompared on 2 separate occasions with a reference cell direc
47. ES Calibrate thermometry bridges quickly simply and in house W Calibrate ac and dc thermometry bridges WE High accuracy better than 0 1 ppm at 100 Ohms W Extensive user manual including uncertainty analysis i Windows application for full analysis and reporting Isotech are proud to announce that we have signed a world wide exclusive license agreement with Industrial Research Ltd of New Zealand IRL for the production and development of the RBC The operating principle of the calibrator is very simple One way of checking a bridge is to measure the resistance of a pair of resistors separately and then measure the two in series Ideally the series measurement should equal sum of the two individual measurements The calibrator enables similar comparisons but with four precision resistors measured in up to 70 different series and parallel combinations Because the interrelationships of all 70 combinations are known in terms of the four base resistances the measurements can be analysed to provide up to 66 independent measurements of the bridge error Rod White of IRL the inventor used the RBC to investigate 38 bridges from leading manufacturers omall but significant faults were found with 1596 of those tested but like the walking wounded they continued to provide a plausible reading The RBC increases confidence in a laboratories bridge and enables the laboratory that owns an RBC to offer a service checking br
48. IONS FOR PRIMARY amp SECONDARY LABORATORIES 31 O to 1000 C d ll Unique Aspirated Design E High Stability WE Ultra High Purity Quartz Isotech has produced over 200 high temperature thermometers which have been sold world wide for use up to the silver point As a consequence of our pre delivery testing alone we have probably made more silver point calibrations than anyone else in the world No one fully appreciates all the mechanisms at work when a coil of pure platinum wire inside a quartz envelope is taken to 1000 C and back However endless hours of study at National and International level plus our own significant work at Isotech have enabled us to design build and test a superior Silver Point Thermometer This we feel is a significant contribution to better high temperature calibration First the 96178 can breathe a valve in the handle can be opened to allow oxygen depleted or moist air to escape from inside the sheath and replacement by fresh air containing 2096 oxygen The valve is normally opened at elevated temperatures and closed to prevent moisture ingress before water triple point measurements are performed oecond the 96178 is the only thermometer ever designed with platinum heat radiation shields built into the sheath to prevent heat radiating up inside the sheath Third a new ultra pure quartz developed for the semiconductor industry at a cost of between 20 and 30 million pounds has b
49. Mean Ocean Water and V SMOW the BIPM recommended in 2005 that The triple point of water is now defined as the equilibrium temperature of vapour liquid and solid water with the liquid water having the isotopic composition defined by the following amount of substance ratios SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES HEB PPT R The Jarrett Isotech Water Triple Point Cells 0 00015576 0 000379 0 002005 mol H per mol H mol 17O per mol t60 mol O per mol t60 Technical annex for the International Temperature Scale of 1990 ITS 90 Adopted by the CCT on 10 June 2005 oince early in 2000 Jarrett Isotech Cells have been made to this definition and our cells have been within 10 and 40uK of it During 2005 subsequent to the CCT definition the water in our triple point cells has been further enriched and our latest cells meet 20uK of the above definition Further we can provide Isotopic Analysis giving the exact composition with an uncertainty of 3uK Samples of the actual water used in a particular cell can be supplied for purity analysis Isotech s unique KT Water Triple Point Cell Quartz vs Borosilicate Glass The special cleaning and ageing of the usual borosilicate glass ensure and the evaluations demonstrate the long life of the cells Selected cell types are available in quartz construction which are expected to last ten times longer Performance The cells inclu
50. Oh she said without hesitation until its right The auditor was so impressed he asked if he could use the saying elsewhere Your calibration procedures need to be unique to you to suit your equipment your staff and your customers Likewise uncertainties you will have a unique combination of equipment and procedures These will dictate your uncertainty Although we cannot write your procedures and calculate your uncertainties we want to help and so if you go to our website you will find some examples that may help you develop your own budgets More Information A list of our recommended books is available on the Isotech website and the Isotech journal of thermometry We have an e learning course and we run occasional 2 or 3 day courses here in Southport World wide we have a network of 90 agencies to help you locally Contact us for your nearest nttp www isotech co u SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES o 6 BI Uncertainty 0 000070 C la Fifty Years of Proven Use M Quartz Glass and Isotopic Analysis Available The Water Triple Point is the most important fixed point the only point common to the ITS 90 and the Thermodynamic Temperature Scale It is an essential reference point for every temperature laboratory The Jarrett lsotech cells are the best standard all cells are not the same accept no inferior device Total Confidence The International
51. Six 8mm pockets all 250mm deep 0 01 to 99 99 0 1 100 0 to 650 0 PC can display 0 01 across whole range with the software included Display Resolution SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 93 POTTS 7 Oberon E Compact Heatpipe Furnace BI Suits Aluminium Silver or Copper Fixed Points WE Can be used for comparison and infrared calibration Model 426 is for Aluminium Silver Gold or Copper slim fixed point cells as well as for comparison calibration Heatpipes provide the ideal conditions for the creation and maintenance of slim ITS 90 cells The furnace core is a specially designed stress free isothermal heat pipe which provides a very low thermal gradient along the core working length The heatpipe is designed so that the inner wall is not subject to thermal expansion stresses from the outer wall before the heat pipe reaches conduction temperature The working fluid is permanently and safely sealed within the plasma arc welded enclosure The Oberon can be used with Blackbody Fixed Point Cells Oberon for Aluminium or Copper Slim Fixed Point Cells Model 426 Accessories Temperature Range 450 C to 1100 C Metal Block Bath Standard Insert 6 x 8mm holes x 250mm deep Stability 0 05 C Non standard Insert please consult Isotech ITS 90 Fixed Point ITL M 17672QS Aluminium Quartz Clad Slim Cell Apparatus ITL M 17673QS Silver Quartz Clad Slim Cell ITL M 17674QS Copper Quartz Clad Sl
52. Standard Equalising Block Please specify voltage required 78 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES Blackbody Option Note Spherical furnaces are normally supplied 240 Volts 50 Hz 3 kW with 8 sensor insertion points one of which is used to house the control thermocouple Eight tubes with a nominal internal diameter of 6 mm have been found to give a very good and stable performance It is the configuration around which the specification has been written OPTIONS To special order the following options are available please contact Isotech for details 1 16 Thermocouple Inserts Because of the extra thermal mass involved in offering this option an extra 30 minutes should be allowed for full stabilisation Larger Thermocouple Inserts Inserts of up to 10mm 0 4 inches diameter can be accommodated in the furnace Please consult Isotech Platinum wrap can be fitted Isotech wrap the insert of the Saturn in Platinum foil Reducing the gradient at 1000 C to an unmeasurable value less than 1uV difference from 2 type R Thermocouples 4 Blackbody Option Thermocouple Calibration Each thermocouple is completely isolated in a gas tight closed end tube to prevent any contamination problems during calibration Normally the windings will require replacing after a few years of operating dependent on work cycle and so the furnace has been designed with ease of maintenance in mind A spare set of windings
53. T Ro 2 50 0 07ppm 0 125ppm 0 25ppm 0 5ppm Accuracy Ratio 0 95 to 1 052 Equivalent Temperature Accuracy 0 017ppm 0 017mK 0 001mK 10nV 0 03ppm 0 03mK 0 001mK 10nV 0 06ppm 0 06mK 0 01mK 10nV 0 125ppm 0 125mK 0 01mK 10nV Resolution Resolution Voltage Stability Oppm yr E Oppm C HP 0 500 kO 125mV 1 10 25 100 4000 Oppm yr P Oppm C 8 0 500 kQ 125mV 1 10 25 100 4000 Oppmyyr P Oppm C HP 0 100 kQ 125mV 25 100 400Q Oppm yr P Oppm C HP 0 100 kQ 125mV 25 100 400Q TC resistance ratio Resistance Range Voltage Range Thermocouple Internal Resistance Standards Internal Standard Resistor Stability TCR lt 0 05ppm C Annual Stability lt 2ppm year RS232 GPIB amp USB amp Ethernet 1 100 lt 0 6ppm C lt 5ppm year 25 100 400 lt 0 3ppm C lt 5ppm year Interfaces RS232 GPIB USB Power Weight 25W maximum 1 5A RMS maximum 13 3kg 13 3kg 20W maximum 1 5A RMS maximum 12 4kg 12 4kg Notes 1 Over whole range of SPRT 200 C to 962 C For Ro 0 25Q increased by a factor of 2 5 2 E g 25Q SPRT with 25Q standard resistor at water triple point or with direct comparison of similar SPRTs 3 The microK uses a substitution technique in which the Device Under Test and the Reference are successively switched into the same position in the measuring circuit This means that the stability of resistance ratio measurements is im
54. The uncertainties are still small and suitable for all but the Premium Calibration service involves realizing three melt most demanding of Primary Laboratories plateau three freeze plateau and two intercomparisons to Isotech UKAS Calibration Uncertainties k 2 Cell Premium Calibration Service Standard Calibration Service The latest schedule UKAS Schedule Note 4 UKAS Schedule Note 5 RE Isotech website Mercury 0 22mK 1mK or at www ukas org Gallium 0 07mMK 1mK Indium 0 65mK 2mK P Tin 0 60mK 2mK 4 Zinc 0 90mK 2mK Aluminium 1 1mK 6mK Silver 2mK 30mK URAS ETT SITIET 18 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES Available Types Cells Indium Tin Zinc Aluminium Silver Copper 156 5985 C 231 928 C 419 527 C 660 323 C 961 78 C 1084 62 C Uncertainty 0 65mk 0 60mk 0 90mk 1 1mk 2mk Sealed Cells Metal Clad Quartz Clad 17668MO 17669MO 17671MO 17672MO N A N A 17668 17669 17671 17672 17673 17674 Open Cells Metal Clad 17668MCO 17669MCO 17671MCO 17672MCO N A N A Quartz Clad 17668QCO 17669QCO 17671QCO 17672QCO 17673QCO 17674QCO Other points such as Lead and Antimony available Please ask for details Isotech cells are of the highest purity available Open cells conform to CCT 2000 13 Sealed cells are sealed to one atmosphere with 6N pure argon at the freeze temperature Resealable Met
55. Triple Point Cell B8 30 130 This small cell fits into portable Dry Block Calibrators for use outside of the calibration laboratory It can be calibrated to 0 0005 C 0 5mK Performance Accuracy The equilibrium temperature of the Jarrett Isotech Triple Point of Water Cell is within 20uK of the 2005 definition as described in CCT 05 07 rev 2 Isotopic Analysis can be provided to give the exact composition within 3uK Reproducibility The equilibrium temperature of a cell will repeat to within 0 000 02 C of the mean equilibrium temperature Stability After equilibrium is reached the temperature of the inner melt of an ice mantle will remain constant to within 0 000 01 C for as long as the mantle can be preserved up to 90 days in some instances Life Cells made from Borosilicate Glass may drift lower in temperature by up to 0 1mK after 10 to 20 years Cells made from Quartz are expected to last 10 times longer SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 7 ISUT CH 8 Physical Features Type A cells were designed by Dr H F Stimson at NBS A tubular glass extension at the top of the cell serves as a convenient handle for lifting and carrying the cell as a hook for Supporting it in an ice bath and as an indicator of partial pressure of air in the cell a 05 ye m Nominal Dimensions in mm gt Model A B C D E A11 50 270 11 50 350 270 100 A13 50 270 13 50 350
56. Volume Calibration Bath 12 Liquid Selection Guide 13 Model 875 Fluidized Calibration Bath 74 75 Model 877 Thermocouple Calibration Furnace 16 71 Points on the Temperature Scale POTTS Introduction 78 ISOTOWer eere P DD ne 80 83 olim Fixed Point Cells Sealed 37 4 ccc ahs 84 85 0 s ALAS 06 07 ceanus 6 eee ii Reese 08 89 Medusa 510 and Medusa 5112 5 595 5 90 91 beron PR see 92 POTTS Ease of Use M MME Em al 93 Introduction to Temperature Calibration Software 94 Icarus Calibration Software Baa usus 95 Cal NotePad Calibration Software 96 Cal Easy Calibration Software 97 98 Calibration Services Miele RR ms 99 The company is always willing to give technical advice and assistance where appropriate Equally because of the program 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 Products in this catalogue are all C Compliant ISUT CH Introduction Primary amp Secondary Laboratory Equipment Our knowledge product quality and integrity are the reasons for buying from Isotech In our catalogues datasheets and website you will not find
57. When the 915 is used in conjunction with our external chiller the low temperature limit can be extended to 65 C The 915 has a wide temperature range using silicon oils and other suitable liquids All components in contact with the liquid are of stainless steel and are insulated with materials which are completely safe in use The 915 used in conjunction with a chiller utilizes the latest ozone friendly gases Liquids are circulated by a propeller which mixes and forces the liquid through a specially designed orifice in the rear of the two parallel tubes A variable speed motor optimizes the flow as the viscosity of the liquid changes Below the orifice plate liquid is circulated over a mineral insulated heater and temperature sensors which control the temperature of the bath The liquid flows up the calibration tube and weirs over the tube into a collection tray where it returns to the rear tube for recirculation An angled side entry tube enables a refrigeration cooling probe to be inserted in the rear of the two parallel tubes Model Temp Range 915LW 65 C 40 C Volume The standard temperature controller has resolution from 0 01 C to 0 1 C which auto scales to suit the four digit display all digits can be read with the Cal NotePad Software The standard controller can be replaced with a model offering a display resolution of 0 01 C over the whole range This High otability controller Option 915 E also offers b
58. YPE S Platinum vs Platinum 1396 Rhodium Platinum vs Platinum 1096 Rhodium How to order Model 1600 Type R 300 Model 1600 Type R 600 Model 1600 Type S 300 Model 1600 Type S 600 If cold junction not required specify NCJ UKAS calibration is included 38 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES SS ee _ Thermocouple standards ex Gold Platinum B Pure Metal Construction ll Best Homogeneity B Alternative to HTSPRTs Since 1995 Isotech have been producing various designs of special Au Pt Pt Pd Pd Au thermocouples for researchers From our experience we can now offer the most popular of these the Au Pt thermocouple in a standard form All wires are 99 999 pure and are fully annealed according to the recommendations of McLaren Assembly also follows his prescriptions which have never been bettered Alternative to HTSPRTs After final assembly and annealing the Au Pt thermocouples Commi aes NIEN ON will conform to IEC 62460 Edition 1 2008 07 Accuracy of up to 0 05 C For the smallest uncertainties we calibrate the thermocouple at the Zinc Aluminium and Silver Fixed Points 650mm E Handle Breathing Tube We achieve these results because CN 1 All materials are selected for their purity and high quality 1150mm 2 All parts are pre aged and annealed prior to construction z Ey t 250mm 3 The construction allows for differential expansion of 44 the Gold and
59. ad from industrial sensors being calibrated including 4 20mA transmitters all to high accuracy 5 Designed to eliminat against real world proble ISUT CH Data Management Probe data and logged measurements can be exported to a USB Memory drive at the push of a button Additionally the instrument is future proof with future software updates applied from a USB drive Connectivity and Communications With USB host two serial interfaces and Ethernet it is easy to communicate with the milliK whether it is on the bench next to a PC or remote by using a LAN or WAN connection These interfaces are fitted as standard The milliK includes a PC lead and Cal Notepad software Open Calibration The milliK is readily calibrated against resistance and voltage standards There are no internal adjustments and the calibration commands are simply sent via RS232 or from the front panel password protected The procedure is open and fully documented unlike some other instruments where there is no choice but to return to the manufacturer 3 Logs The milliK can record time stamped data to internal memory or a USB Memory Drive SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 49 Specifications Input Channels Channels 1 2 Channel 3 Ranges Units Accuracy SPRTs PRTs Thermistors Thermocouples 4 20mA 3 SPRTs PRTs Thermistor and Thermocouples Process Inputs 4 20mA Isolated 24VDC Pow
60. al Open Quartz Sealed Metal Sealed Quartz J Pressure can be set by user Pressure can be set by user Convenience E Convenience W Protected Against Contamination and Ambient Pressure Effects Easily Transportable Between Labs Robust W Protected Against Contamination and Ambient Pressure Effects M Requires vacuum and gas flow system Transportable Between Labs WE Requires vacuum and gas flow system Easily Transportable Between Labs WE Robust WE Thermally Closer to ITS 90 temperature WE Sealed Construction with open port for gas supply Can be disassembled Cell baskets complete with appropriate heat shunts and reflectors are available seperately A carry case is included with Sealed Cells Nominal Dimensions Outside Dia 50mm ROCEDIEE 8mm Height 270mm Metal Depth 200mm Outside Dia 50mm arie B BIN amm Height In Sn Zn 520mm Al Ag Cu 610mm Metal Depth 200mm Outside Dia 50mm ROCEDI 8mm Height 270mm 2 350mm Tube Metal Depth 200mm Outside Dia 50mm Inside Dia 8mm Height 275mm Metal Depth 200mm The height is measured from the bottom of the flange wherever necessary excludes sealing tip SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 19 20 ISUT CH International raceability Certificates is sued by Isotech but i l are legally r t in many countries throughout the Sh iq and accepted not just in the UK Isotech has al
61. ange your life and try the Isotech Ice Mantle Maker We developed it like so many of our products for our own use in our UKAS facility It is so easy that we actually want to make more mantles The days of dreading making ice mantles are gone with the Ice Mantle Maker It works by using a specially designed anti gravity heat pipe The heat pipe exits the cell and exchanges the heat cool in a small container filled with solid carbon dioxide or preferably liquid nitrogen Because of the low temperature gradient along the heat pipe the ice mantle is formed close to 0 C and so beautiful strain free mantles are formed The Mantle Maker works equally well when you wish to increase the thickness of ice at the bottom of the cell By keeping only a cc of alcohol in the cell the heat transfer is focused around the bottom of the cell Background In 1969 John Evans of N B S America described a method of heat removal and ice mantle growth in a water triple point cell His materials liquids etc were adequate at the time and the idea has been considered as a novelty since Now Isotech have brought the liquids and technology right up to date to effectively solve the problem of trouble free and strain free fast ice mantle manufacture Ice Bridge Prevention Collar In developing the heat pipe Ice Mantle Maker we worried that an ice bridge can form across the top of the cell We therefore developed a clever collar that sits around the
62. ar an inner equalizing block having wells for 3 thermometers top connections for filling and monitoring the level of liquid coolant a pressure safety blow off and a manifold which may be used to thermally tie the thermometers under test to the equalizing block with helium gas optional Since the slopes dR dT of Standard Platinum Resistance Thermometers are very similar at any temperature calibration uncertainties not larger than 0 002K can be obtained at a small fraction of the cost of an absolute calibration Nitrogen Boiling point of Liquid Nitrogen 195 798 C High Accuracy 0 002k Handbook Tutorial supplied Self contained Bench mounted Model ITL M 18205 Temperature Range 185 C or 196 C nominal Uncertainty mni 0010 20 The temperature distrbution across the copper block is less than 2mK To this must be added the uncertainty issued with the calibration certificate from the National Laboratory Extra uncertainties will also exist if dissimilar probes are compared Power NA Dimensions Below flange 430mm Diameter below flange 127mm Flange diameter 165mm Weight 14kgs How to order ITL M 18205 Nitrogen Boiling Point Apparatus Note The Nitrogen Point Apparatus may be adapted for use with liquid argon Please contact the factory for details SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 59 60 195 798 C d B Safe to use B Economical This model is a lower cost altern
63. ative to the ITL M 18205 This model is a simple apparatus open to the atmosphere comprising a stainless steel dewar flask filled with liquid Nitrogen an insulating layer which houses a metallic equalising block and thermometer holder Lastly a split insulated lid reduces evaporation and permits easy addition of liquid Nitrogen From time to time extra liquid Nitrogen must be added approximately every 30 minutes to keep the dewar flask full The dewar flask is 100mm inside diameter and 280mm deep The standard equalizing block houses four SPRTs or industrial thermometers up to amm in diameter giving 0 002 C temperature uniformity Method of Operation A standard calibrated SPRT is placed in the equalizing block together with the sensors to be calibrated The whole is allowed equilibriate The level is checked and Nitrogen added as necessary and readings taken 10 minutes afterwards The Isotech Simple Liquid Nitrogen Apparatus is safe to use having no glass dewar flask internally to explode A comprehensive handbook accompanies the apparatus which includes an article by Henry E Sostmann on the corrections required to convert the calibration to the ITS 90 value of the Argon Triple Point Technical Note The Simple Liquid Nitrogen Apparatus because there is air access will slowly condense oxygen from the atmosphere increasing the temperature of the Boiling Point This is of small importance provided a calibrated SPRT is
64. ature range which can be achieved is dictated by the liquid being used and the ambient temperature Refer to Liquid Selection Guide on page 73 Single Stage and Dual Stage Chiller Cool Down Graph Temperature C ND al Stage Chiller 915 11 ISUT CH 915 02 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 65 ISUT CH Accessories 915 01a 915 01b 915 D 915 02 915 03 915 05 915 07 915 08 915 09 915 E Available for the Isotech Parallel Tube Bath is a variable depth aluminium equalising block containing four drilled pockets 8mm diameter by 160mm deep in which temperature sensors can be placed and is suitable for use with silicon oils The equalising block is suspended centrally within the calibration tube and is easily removed As an alternative to the above a copper equalising block dimensionally the same as 915 01a may be supplied This block is more suitable for use in water and other liquids Increased depth Calibration Tube Assembly Working volume is 100mm diameter by 530mm deep This variant allows for the calibration of very long thermometers typically the calibration of long liquid in glass thermometers See also 915 02 This assembly will hold up to 12 liquid in glass thermometers maximum diameter 12 7mm radially and a centre mounted standard sensor The assembly may be rotated allowing systematic calibration The assembly is designed for partial or full immersio
65. bration see Cal Easy for a fully automated calibration solution System Requirements Laptop or Desktop Windows 98 2000 XP Serial Ports RS232 or Adapaters CNP is compatible with the following Isotech calibration equipment Calibration Baths Furnaces Dry Block and POTT models with a serial interface SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES http www isotech co uk calnotepad html Temperature Indicators Isotech millik TTI 1 TTI 2 TTI 5 TTI 6 TTI 7 TTI 10 and TTI 22 Ca ibration Software l Cal Easy e Fully Automatic Calibration Design and Print Certificates Calculate Coefficients Prints PRT and TC tables Supports more equipment Try the full version free for 30 days Use Cal Easy to automate sensor calibration enter up to 20 calibration points and let the software set the bath wait for stability and log the data automatically Choose the stability criteria and how many points to record at each calibration temperature Automatic temperature calibration the easy way l Cal Easy lets you use a built in template or design your own certificate Add text data fields and graphics on single or multiple pages then publish the calibration data to the certificate Do you want to include or calculate coefficients Then drag your data to the ITS 90 or Calender Van Duesen calculators For thermocouples use the powerful regression calculator to fit error cur
66. bration point and have the average value appear on the certificate Create one or multiple page certificates as many as required to suit different customers and different types of calibration Thermocouple Industrial PRTS and SPHIs Drag and drop data and text fields onto the certificate link to logos and other graphic elements The in built calculator will calculate coefficients for both IEC 751 ITS 90 SELECTOR SWITCH milliK The number of sensors that can be calibrated depends upon the equipment used Calibrate up to 16 sensors with two switch boxes expandable to 32 System Requirements Computer Operating System Display Desktop or Notepad PC Windows 98 2000 XP 800 X 600 16 bit display 1024 X 768 recommended l Cal Supported Camera Check with Isotech for supported models Serial Ports A maximum of three ports are required one for the dry block one for the TTI and one for the Switchboxes Two Switchboxes can be operated from a single port SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES and for thermocouples you can choose what order of regression to fit an error curve Try the demo version and see how easy it is to drag data to the calculator and export the results straight to a certificate Judge for yourself how this compares to any other software The demonstration version will run without restriction for 30 days and enable you to learn how to use l Cal Easy and save time by rapidly pro
67. calibration of Platinum Resistance Thermometers Thermistors Thermocouple and Process Instrumentation 4 20m4A over the range 270 C to 1820 C In addition to low uncertainty measurements from Reference Standards and Industrial sensor measurement the millik can control Isotech temperature sources sequencing through a programmable list of temperature set points and log data to internal memory or a USB drive The milliK forms the hub of a measurement system reading SPRIs RTDs Thermistors Thermocouples and 4 20mA current inputs with the option to control calibration baths and log readings accurately Benefiting You The milliK sets a new standard for value versatility and accuracy lt 5ppm over range for PRIs 2uV for Thermocouples and UA for current transmitters see table oupporting a wide range of sensors and functions it replaces individual devices making a cost effective calibration solution A robust design and operation from AC or DC power allows the milli to be used in the laboratory test room or out in the field The milliK can display in C F K Ohms mV and mA with numeric and graphical display modes The large back lit display makes configuring the instrument and setting the scrolling strip charts intuitive The USB port allows for the use of a mouse keyboard or USB Drive Built on World Leading Technology In 2006 Isotech launched the microK range of thermometry bridges which quickly established
68. cell and prevents ice formation at the water vapour interface We include this free with the Mantle Maker provided you inform us of the cell diameter with the order Weight 250g Typical time 20 to 30 minutes using a Jarrett Isotech to create a A11 Water Triple Point Cell mantle Longer or shorter times for larger or smaller cells Options Additional Ice Bridge Prevention Collar SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES a Ice Mantle Maker Water Triple Point e o How to order 452 Ice Mantle Maker and one ice bridge prevention collar Please specify A Cell Type or B Outside diameter of Water Triple Point Cell mm C Depth from shoulder of Cell to water level mm I oe ae Sostmann Isotech d Gallium Cell lll Uncertainty 0 000070 C WE Thirty Years of Proven Use lil Open and Sealed Models second only to the Water Triple Point and in many ways because of its ease of use and purity superior to it is the Gallium Melt Point At 29 7646 C this is a very convenient temperature Total Confidence Confidence is a major requirement in a standard The Isotech Gallium Cell and Apparatus have a long history and have been successfully used in most National and Primary Laboratories world wide International comparisons prove the quality of the Isotech Cells and are unique in the number and history of comprehensive evaluations Calibration of Isotech
69. d so cannot be UKAS certified over Range 4 Please contact Isotech if calibration is required above Zinc Mode 909Q I Range C 29 90 Ratio Wga gt 1 11807 gt 1 11807 gt 1 11807 gt 1 11807 gt 1 11807 gt 1 11807 Outer Sheath Quartz Quartz Nominal Diameter Construction Sealed with 7 5mm dry oxygen argon mix Sealed with dry oxygen argon mix Sealed Sealed Sealed with dry oxygen argon mix Sealed with dry oxygen argon mix Notes Isotech recommended secondary standard SPRT 100 Ohm secondary standard SPRT Internal alumina tube protects sensor from contamination Internal alumina tube protects sensor from contamination Optimised for low temperatures less stem conduction due to internal construction Optimised for low temperatures less stem conduction due to internal construction SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 35 ISUT CH Introduction to Standard Thermocouples B Thermocouples Isotech Model 1600 Platinum Platinum Rhodium Available as Type R or Type S these thermocouples are housed in a 99 7 recrystallized alumina sheath 300 or 600 mm long and can be used to 1600 C Isotech Gold Platinum Thermocouple This model offers smaller uncertainties than Type R or S using only pure metals in the construction and can be considered as an alternative to HTSPHRIS NPL Platinum Palladium Thermocouple Th
70. d system the two systems have the same temperature as each other Isotech Comparison Equipment Isotech products are designed to be deep enough to be stable enough and to have sufficient uniformity to enable calibration to the smallest of uncertainties The comparison This can be rephrased to explain comparison calibration if a calibrated thermometer is at the same temperature as a calibration bath and a thermometer under test is at the same temperature as that calibration bath then the calibrated thermometer and the thermometer under test are at the same temperature calibration schedule below is from Isotech s UKAS accredited calibration laboratory The performances are achieved using Isotech Baths and Reference Thermometers are freely available Isotech UKAS Calibration Uncertainties k 2 Platinum Resistance Thermometers Calibration by comparisons 80 C to 40 C 40 C to 50 C 50 C to 156 C 156 C to 300 C 300 C to 420 C 420 C to 660 C Evaluation reports describing the performance of Isotech equipment are freely available SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES Evaluation reports describing the performance of Isotech equipment The latest schedule can be found on the Isotech website or at www ukas org a 10 HUR A5 Tr Types of Equipment Cryogenic A Liquid Nitrogen Comparator provides a convenient calibration point at a nominal 196
71. d thermometers and surface sensors The Medusa is available in two models the BASIC B and the SITE S The B model includes a sophisticated temperature controller with a dual display for oet lemperature and Dry Block Temperature The S model includes a built in digital thermometer to which an external standard thermometer can be connected giving greater accuracy eliminating temperature gradient and loading errors Also included in the site model is a timer which can set the bath between two temperatures and automate ITS 90 fixed point operation For Surface Sensor and Blackbody use an external thermometer is recommended For laboratory accuracy the Medusa can be used with a high end temperature indicator such as an Isotech TTI model Includes as standard Windows Software Computer Interface and a Ramp to Set Point Feature Increased resolution of 0 01 available throughout the range via the PC interface and from 0 01 to 99 99 locally on the auto Fixed Point Cells Available ranging front display The controller features multi point block to display correction giving good absolute accuracy EMOTE HEP eoram Gallium 29 7646 C 220000 206 The S model has universal sensor input allowing Platinum Rauma 156 5985 C 0 0007 C Resistance Thermometers Thermocouples types K N R S L B PL2 T J and E along with Linear Process Inputs UR BUSES BOWES including 4 20mA current transmitters to be displayed on the Zinc 419 527 C 0 001
72. de a certificate of conformance A UKAS calibration service is available for all of our water triple point cells The larger cells can be UKAS certified to 0 000070 C 2 Sigma This will benefit the most demanding of NMIs and users Reverting to the very first designs of water triple point cells Isotech produce a cell with Isotopic analysis a McLeod gauge to assess any trapped air and an More cost effective calibration options to uncertainties of attached flask where the cell s water can be transferred 0 1 and 0 5mK are also available Regardless of and redistilled By accounting for these sources of calibration the Jarrett Isotech cells are reproducible to uncertainty we claim that this cell represents the ultimate 0 000020 C and after equilibrium has been reached the reference for those requiring cells as close to ITS 90 as inner melt of the ice mantle will give stability of possible Please ask for a copy of a comprehensive 0 00001 C report describing the cell its operation and performance Model Types Premium Water Triple Point Cells Borosilicate Glass These Premium Cells can be calibrated to an uncertainty of 0 000070 C 0 07mk xls Mor A13 50 270 EXE S 270 Eo n B13 65 270 B16 65 270 Also available in Quartz Glass Further Laboratory Water Triple Point Cells These cells have shorter immersion depth and can be calibrated to an uncertainty of 0 000100 C 0 1mK B12 40 210 B12 46 210 Slim Water
73. ducing certificates to your own requirements Iry it and see why we are confident that l Cal Easy is the market leader Note Available in different languages Spanish and Chinese currently available http www isotech co uk icaleasy Calibration Services Isotech s UKAS accredited calibration laboratory Northern Temperature Primary Laboratory NTPL was established in 1980 and has grown to be a full scale laboratory providing calibration to the smallest of uncertainties Isotech was the first UKAS laboratory to be accredited to calibrate ITS 90 Fixed Point Cells Our accredited uncertainties are now smaller than many the scope of other accredited laboratories and smaller than most National Measurement Institutes NTPL comprises of three physically separate laboratories A Primary Laboratory A Secondary Laboratory and Calibration laboratory for Industrial products Isotech can offer a tailored service to meet your needs be it a Dry Block calibration of the calibration of a standard for the primary lab NTPL is regularly visited by scientists form the the leading NMIs and provides a range of highly regarded training courses Extracts from the Schedule 42 Isotech UKAS Calibration Uncertainties k 2 Calibration of SPRTs at Fixed Points Temperature Uncertainty BP Nitrogen 195 798 C 5mK TP Argon 189 3442 C 0 5mK TP Mercury 38 8344 C 0 24mK TP Water 0 01 C 0 07mK MP Gallium 29 7646 C 0 15mK FP Indium 156
74. e ranges and economic pricing make this thermometer ideal for the secondary laboratory For smaller uncertainties to suit the Primary Laboratory refer to the Model 670 SPRIs The resistance element is of pure platinum coiled and mounted in a strain free construction The former is of pure alumina material and all parts have been pre aged to eliminate contamination and strain All joints are welded to minimize resistance changes The leads are brought to a handle assembly where they are connected to a low loss cable 2M long and screened The 909Q has a quartz sheath while the 909L and 909H have metal sheaths Whilst metal sheathed thermometers appear more robust than the quartz glass models it should be noted that ALL SPRTs are fragile devices and must be handled with care Three thermometer lengths are available standard length 480mm extra length 550mm or maximum length 600mm Quartz glass thermometers have the advantage that the internal components are visible and can be inspected and continue to be our recommended models The low temperature models have excellent immersion characteristics and a significant cost saving when compared to the higher temperature models The Model 909 is supplied with a calibration certificate giving Rrew and Wga Alternatively we can provide a complete UKAS calibration certificate see table opposite For transportation and storage the Model 909 is supplied in its own attractive carrying case 34
75. een adopted for use in the construction of the 96178 This new thermometer exemplifies our commitment to achieve the highest possible quality and minimum of contamination How the thermometer is handled is most important for its stability and a purchaser will receive a comprehensive manual and tutorial with each 96178 Under some circumstances provided the interior of the thermometer is undamaged we can replace the outer quartz sheath Please consult us if a replacement is required To exploit fully the accuracy of the 96178 a user will need a furnace for warming and annealing the thermometer as well as one to house the silver point aluminum point cells A Dual Calibration Furnace from Isotech combines these two features together with all the special accessories and handling know how we have discovered Silver Point SPRT Model 96178 Model No 96178 Temperature Range 0 C to 1000 C Resistance Value Ro 0 25Q others to special request Resistance Ratio Wga gt 1 11807 Dimensions Length 650mm Diameter 7 5mm Drift during use a Smallest When taken to 970 C slowly over 1 to 2 hours and cooled slowly again overnight to 450 C the triple point of water resistance will repeat to better than a temperature equivalent of 0 0005 C b Largest When thermally shocked from 970 C to 20 C the triple point of water resistance will increase by a temperature equivalent of up to 35mK this is mostly recoverable upon annealing
76. el 954 8 Channel PRT Switch for TTI 22 and TTI 7 PLUS Model 958 8 Channel Thermocouple Switch for TTI 22 and TTI 7 PLUS 40 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES Resistors To enable the smallest of measurements Standard Resistors are used and in the Primary Lab these resistors require to be kept at a precise and constant temperature Isotech can supply and calibrate Standard Resistors to uncertainties less than 0 08ppm Resistor Selection Guide Model SRA amp SRB Values SRA 1 10 25 and 100 Ohm 10 25 100 1000 Standard Resistor 400 Ohm to special order 10 000 Ohm Maintenance Bath SRB 1000 and 10 000 Ohms Application Primary and Secondary Affordable Resistors with Precisely Maintains SRA Lab microK inbuilt temperature control Primary Resistors at Fixed Temperature RBC Resistance Bridge Calibrator The RBC is designed for quick and simple in house calibrations of AC and DC thermometry bridges with an accuracy of better than 0 1 ppm at 100 Q The calibrators are supported by software for analysis of the results R SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 41 Pe ee Precision Thermometer i microK ll Ratio Accuracy to lt 0 02ppm 20ppb with Zero Drift ll SPRHIs PRIs RTDs Thermistors and Thermocouples ll Reliable 21st Century 100 Solid State Design The microK family of precision thermometry bridges use a completely new measurement technique to achieve accurac
77. ely at the fixed points of ITS 90 or by comparison WE Can also be used as a Dry Block Liquid Bath E 25 C to 140 C The multi functions of the Oceanus 6 is a unique concept from Isotech so unique that it is currently the subject of a patent application The Oceanus 6 is a complete calibration laboratory working over the temperature range 45 C below ambient temperature to 140 C It permits the calibration of temperature sensors absolutely at fixed points of the IT 5 90 scale or by comparison to a reference standard It will calibrate both contact and non contact thermometers such as optical pyrometers surface sensors liquid in glass thermometers as well as thermistors thermocouples and resistance thermometers whether they are short long or odd shaped Further it permits maintenance of reference standards by confirming the Ice or Water triple point at regular intervals The Oceanus 6 has a calibration volume of 52mm diameter and 300mm deep and is supplied with the very latest technology digital indicator timer and controller making the Oceanus 6 a complete self contained calibration laboratory The Oceanus 6 offers unprecedented accuracies of 0 0002 C 2 Sigma at the Water triple point and the Gallium melt temperature of 29 7646 C and up to 0 005 C in the stirred liquid bath option by comparison Model 980 Uniformity 0 018 C Temperature Range 45 C below ambient to 140 C Absolute minimum 45 C tempe
78. embly comprises a 7mm x 300mm or 600mm gas tight 99 7 recrystallized alumina sheath inside which is a 2 5mm diameter twin bore tube holding the thermocouple The inner 2 5mm assembly is removable since some calibration laboratories will only accept fine bore tubed thermocouples and some applications require fine bore tubing The covered noble metal thermocouple wire connects the measuring sheath to the reference sheath which is a 4 5mm x 250mm stainless steel sheath suitable for referencing in a 0 C reference system Iwo thermo electrically free multistrand copper wires teflon coated connect the thermocouple to the voltage measuring device The thermocouple material is continuous from the hot or measuring junction to the cold or referencing junction Calibration The 1600 is supplied with a certificate giving the error between the ideal value and the actual emf of the thermo couple at the gold point For types R and S thermocouples manufacturing tolerances are small and therefore the use of a standard reference table is particularly apt A few calibration points only are required to determine the small differences between the characteristics of an individual thermocouple and the standard reference table As an example of consistency 48 Isotech thermocouples calibrated at NPL had a standard deviation of the differences from the reference table value at the gold point 11 364uV of only 7uV equivalent to about 0 5 C Therm
79. ent sources to maintain the power in PRTs when they are not being measured eliminating uncertainty caused by power coefficients Cable Pod Connector System The connectors accept 4mm plugs spades or bare wires The standard 4 separation is compatible with standard 4mm to BNC adaptors so you can use thermometers with any standard termination type The Cable Pod connector system uses gold plated tellurium copper to give the lowest possible thermal EMF and the best measurement uncertainty Reliable Like the microK the microsKanner uses the latest semiconductor technology for channel selection and signal routing This completely solid state design therefore provides the highest possible reliability Model microsKanner Channels 10 Keep Warm Currents 0 10mA 0 4 of value 74UA resolution 2 5uA Input connectors Cable Pod connector accepting 4mm plugs spades or bare wires Contact material Gold plated tellurium copper Interface RS232 9600 baud Operating conditions 15 30 C 50 85 F 10 90 RH for full specification 0 50 C 32 120 C 0 99 RH operational 88 264V RMS 47 63Hz Universal 10W maximum 1 2A RMS maximum 520mm x 166mm x 300mm 20 5 x 6 6 x 11 9 Wx D x H 12 6kg 28lb SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 45 250 to 962 C d ll No mechanical relays long life E Warns if calibration due date exceeded ll Accuracy to 0 001 C 1mK Qu
80. er Supply Included SPHTs 0 1150 PRTs 0 4600 Thermistors 0 32kQ 0 130kQ 0 490kQ Thermocouples 115mV 4 20mA 0 30mA C F K Q mV mA Temperature Accuracy SPRTs PRTs at 0 C over full range Thermistors Thermocouples Type B Type E Type J Type K Type L Type N Type R Type S Type T Au Pt Resolution Temperature Conversions Sensor Currents Keep Warm Current Initial 5ppm 50ppm PATAY Initial 3mK 5mK 50ppm 0 239C 0 03 C 0 04 C 0 05 C 0 04 C 0 06 C 2017C 0 19 C 0 05 C 0 12 C Over 1 year Zppm 150ppm 4uV 0 002mA Over 1 year 4mK 7mK 150ppm 0 46 C 0 06 C 0 07 C 0 10 C 0 07 C 0 12C 0 34 C 0 38 C 0 09 C 0 23 C 0 000010 0 0010 0 00001 mV 0 001mA 0 0001 Resistance PRTs Thermistors Voltage Current Temperature PRTs IEC60751 2008 Callendar van Dusen ITS90 IEC584 1 1995 B E J K N R S 1 L Au Pt Steinhart Hart polynomial Thermocouples Thermistors SPRTs PRTs 1mA and 1 428mA 0 496 reversing Thermistors SUA reversing SPRTs PRTs 1mA and 1 428mA Input Connectors SPRTs PRTs Interfaces Display Operating Conditions Display Units Statistics Measurement Time Cable Length Logging Recommended Probes Power Dimensions Weight Optional Carring Case LemoEPG 1B 306 HLN 6 pin gold plated contacts Miniature Thermocouple socket ASTM E
81. erials http WWW IsOtech CO Uk The 670 Family R Ultra Stable SPRTs The 670SQ Range This new quartz sheathed SPRT range from Isotech is the ultimate SPRT for the most exacting measurements over the range of 200 C to 670 C The same ultra stable element is now available in metal sheaths The Model 670SH covers 80 C to 670 C SPRATU u ncertainties The Model 670SL covers 200 C to 165 C Refer to page 17 for details of calibration uncertainties 28 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES Primary SPRT x 670 Family ll Useable Range 200 C to 670 C E 25 5 Ohm SPRT ll Outstanding Performance The 670SQ is our latest thermometer to be specifically designed to give optimum performance up to the aluminium point Its construction permits the four internal platinum lead wires to expand and contract in the same manner as those of silver point thermometers The all quartz construction of the support members gives the most stable performance with minimal drift and a unique platinum radiation shield prevents heat radiating up the inside of the sheath The temperature range and design of this new unit means that we can now offer 25 5 Ohm Ro and 100 Ohm Ro The construction including the coiled sensing element heat shunt baffles and light scattering barriers creates a thermometer of unsurpassed stability Super ieri S id esistance ermometer Because the 670SQ goes beyond the temperature
82. est In our standard and recommended service we perform one melt one freeze and one intercomparison In our premium service in order to reduce uncertainties we perform two or three melts two or three freezes and two intercomparisons The two optional UKAS services with the uncertainties are tabulated below Standard Service UKAS Schedule Note 5 1mK 0 5mK 1mK 2mK 2mK 2mK 6mK The latest schedule can be found on the Isotech website or at www ukas org Available Types Cells Water Water Water Gallium Mercury Higher Temperature Indium Tin Zinc Aluminium Silver Copper Temperature 0 01 C 0 01 C 0 01 C 29 7646 C 38 8344 C 156 5985 C 231 928 C 419 527 C 660 323 C 961 78 C 1084 62 C Uncertainty 0 5mk 0 1mk 0 1mk mal 0 5mk mal 0 5mk 0 7mk 0 8mk 1mk 2mk 30mk Additional Uncertainty mal 0 3mk mal 0 3mk 0 3mk 0 3mk 0 1mk 0 7mk 0 8mk 1 5mk 3mk Model Metal Clad N A N A Model B8 30 130 B12 40 210 B12 46 210 N A 17401M 17724M 17668ML 17669ML 17671ML 17672ML N A N A N A N A Quartz Clad 17668QS 17669QS IWAcv Ae ts 17672QS 17673QS 17674QS Isotech cells are of the highest purity available Open cells conform to CCT 2000 13 Sealed cells are sealed to one atmosphere with 6N pure argon at the freeze temperature Quartz Slim Gallium Slim Mercury Water Triple W Silver and fo 0 c ele
83. etter short term temperature stability see table With the high cost of some silicon oils the 915 s seven litre capacity makes it relatively inexpensive to fill compared to many other baths The changing of liquid is easily enabled by using the fitted drain The design also allows for the expansion of liquids when being raised to a particular calibration temperature 915MWE 30 C 40 C 915H 30 C 300 C 100mm diameter 400mm deep 7 litres or 100mm 530mm deep Option 915D Absolute Stability High Stability Controller Standard Controller Vertical Uniformity Communications Dimensions Weight Safety Power How to Order 90kg 915LW Refer to Evaluation Report for Full Details SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 0 0006 C Water 50 C 0 004 C Water 50 C 0 002 C Oil 100 C 0 007 C Oil 100 C 0 0002 C Water 50 C Includes Serial Interface PC Cable and Software 580mm wide 640mm deep 1020mm high 75kg Compliant to CE Regulations 45kg 1kW excluding Chiller 108 130 or 208 240V 50 60Hz 915MWE 915H For customers who require lower temperatures the range of the 915 bath can be extended by the addition of a chiller unit see photograph below and the chart of model types available The chiller unit s probe 203mm long by 32mm diameter is inserted into the angled side entry tube accessible from the top of the cabinet leaving the calibration volume o
84. f 160mm Metal Clad Isotech produced the first metal clad cells in 1990 and have much experience in the manufacture and calibration of high quality proven metal clad cells Metal clad cells are recommend for all points from Indium to Aluminium Quartz Clad These cells are recommended for Silver and Copper points whilst available for the lower temperature points the metal clad versions are recommended as they are more robust have the same performance and are more cost effective Equipment for Slim Cells The Slim Cells can be used in the same apparatus as the larger cells and the greater immersion depth will give the lowest uncertainties Isotech UKAS Calibration Uncertainties k 2 Cell Premium Service UKAS Schedule Note 4 0 5mK 0 1mK B12 0 5mK 0 7mMK Mercury Water Gallium Indium Tin 0 8mK 1mK 2mK Zinc Aluminium SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES Cost effective dedicated desktop apparatus like the POTTS Points on the Temperature Scale can be used to automatically bring the cell to the plateau These simple to use systems conveniently provide long flat plateau for low uncertainty calibration of thermometers UKAS certification of our Slim Cells The new longer metal clad fixed point cells are intercompared to our reference cells for smallest uncertainties Isotech now offer two UKAS services depending on the amount of measurements we make on the cell under t
85. f the ITS 90 scale or by comparison to a reference standard It will calibrate both contact and non contact thermometers such as optical pyrometers surface sensors as well as thermistors thermocouples and resistance thermometers whether they are short long or odd shaped Further it permits maintenance of reference standards by confirming the Water Triple Point at regular intervals The Europa 6 has a calibration volume of 35mm diameter by 160mm deep and is supplied with the very Model 520 latest technology digital indicator and controller making the Europa 6 a complete self contained calibration laboratory Absolute minimum 45 C temperature Temperature Range 65 C below ambient to 140 C The Europa 6 offers unprecedented accuracies of a 0 001 C 2 Sigma at the Water Triple Point and the cioe Solies Otel 10 MUN Gallium melt temperature of 29 7646 C and the Mercury ses eae ee Triple Point of 38 8344 C uen Ice Water Bath n0010 RO Black Body Source 0 3 C Surface Sensor Calibrator s 0 55 ITS 90 Fixed Point 0 001 C Heating Cooling See Graph opposite Stabilisation Times 10 minutes Calibration volume 35mm diameter x 160mm deep Uniformity 0 018 C Controller Resolution 0 1 to 0 01 4 digit display Indicator Resolution 0 1 to 0 01 4 digit display Indicator Units C F K Communications Supplied as standard with serial interface PC adaptor cable and Cal Notepad Power 300W 108 130 or 208
86. f the bath unchanged The following chiller options are available we recommend and supply the following Order Code Description Temperature Range min max 30 C 40 C 65 C 40 C 915 10 Single Stage Wide Range Chiller 915 11 Dual Stage Wide Range Chiller These chillers have both good reliability and wide operating ranges They contain safe ozone friendly gases The temperatures stated above assume an ambient within the range of 20 C to 25 C Controller Note The standard and enhanced controllers include features custom designed for Isotech by a world leader in temperature control technology Power feedback is used to stabilise against supply voltage changes leading to greater stability A digital filter circuit ensures high integrity of measurement correcting for drift rejecting 50 60Hz pick up and filtering out other sources of input noise The High Stability Controller Option 915 E has a resolution of better than 0 25uV which combined with powerful filtering provides outstanding temperature stability 915 05 38 915 05 Block not included 915 03 ISUT CH Important Chiller probes must be removed from the Calibration Bath when used above their maximum temperature as stated above Health and Safety Notice Rooms in which high temperature liquids are used should be ventilated or have extraction facilities Although the overall temperature range of the bath is 65 C to 300 C the practical temper
87. fale available Low cost W Fits in Dry Blocks Robust Fits in Isotech Dry Blocks WE Robust W Fits in Europa 6 Robust WE Protected Against Contamination and Ambient Pressure Effects WE Easily Transportable Between Labs Nominal Dimensions Cell Outside Dia Inside Dia Height Material Depth Slim Metal 220 160 Slim Quartz 226 160 Slim Mercury 235 140 130 Slim Gallium 140 Water B8 30 130 130 Water B12 40 210 210 Water B12 46 210 210 A free report is available www isotech co uk pdfs SlimCells pdf N B Other SPRTs may give different results depending on the stem conduction properties 1 The uncertainty applies when the cells are sufficiently immersed in deep apparatus 2 When these cells are used in bench top apparatus the additional uncertainty should be included for stem conduction effects The value is typical for the 670 SPAT others SPRTs may give different results depending on the stem conduction properties SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 87 POTTS Europa 6 ay to 140 C g WE Use with Mercury Water or Gallium Cells B Multi Function Calibration Service W Fast Response The multi functions of the Europa 6 is a unique award winning concept from Isotech The Europa 6 is a complete calibration laboratory working over the temperature range 65 C below ambient temperature to 140 C It permits the calibration of temperature sensors absolutely at fixed points o
88. ftware allows equipment to be remotely controlled monitored and the logging of data which can be imported into spreadsheet software Cal NotePad supports the connection of both an Isotech Furnace Bath Block and an Isotech TTI Temperature Indicator I Cal Easy Software l Cal Easy allows for the automatic calibration of temperature sensors from controlling the calibration run to printing certificates and calculating coefficients Demonstration versions of our software are available to download for evaluation Calibration Software B Calculate SPRT Coefficients E Print and Design Certificates B Evaluation Version Available Software for the Primary Laboratory Icarus is designed to calculate and display the relationship between resistance and temperature for Standard Platinum Resistance Thermometers between the triple point of Hydrogen and the freezing point of Silver All calculations are performed using the equations and values defined in the International Scale of 1990 ITS 90 Calculate ITS 90 Coefficients Generate coefficients from data or data from coefficients Design and Print Certificates Use built in layouts including R vs T T vs R W vs T etc Design your own certificates using HTML Use powerful keywords and additional statements Check the calibration quality Fit extra calibration points to the curve Create a distributable Calculator for any individual SPRI Accuracy Estimator See Graphica
89. grated Device known immersion characteristics B Uniquely integrated cell apparatus and correction for thermometer stem conduction B Simple and safe to use with increased confidence in results Conventional Quartz Cell and Apparatus B Fragile and Risk of Breakage B Difficult and expensive to Transport B Cell certified separate from apparatus stem conduction unknown SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 83 84 ISUT CH Specification Model 490 ITS 90 Point Indium Temperature 156 5985 C Metal Purity 6N Plateau Duration UKAS Uncertainty Premium Service UKAS Uncertainty Standard Service Heating Time Pocket Diameter Total Immersion Depth Depth of metal surface to bottom of reentrant tube PC Interface Power Voltage Dimensions Weight UKAS Calibration is Optional Uncertainties apply to whole system SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 491 492 493 Tin Zinc Aluminium 231 928 C 419 527 C 660 323 C 6N 6N 6N Up to 30 hrs 0 8mK 2mK 2 hrs 8 mm 290 mm 180 mm Supplied with PC Cable and Software 900 Watts 110 Vac or 230 Vac 50 60Hz H 430 mm x W 310 mm x D 300 mm 15kg Immersion Compensator Fully compensates for the immersion characteristics of the thermometer under test Siphonic Cell A combined Fixed Point Cell and Heat Pipe The outer wall of the fixed point cell is the inner wall of the heat pipe or siphon thus integrating the cell and i
90. h E ene R Selector Switch Model 958 TC Selector Switch Channels Eight two wire two pole Control Front panel switch And RS232 Also compatible with Isotech VLT system Connectors Miniature Thermocouple Connectors Internal Circuit lt 250mMQ Resistance Thermal EMF typical 2uV after 1 minute of channel set 6uV after 30 minutes of channel set Reference Junction 100Q 1 10 Din Pt100 Measuring Device lt 02 C 5 VDC 100 250 VAC 50 60Hz Power Supply Included Thermal Coupling Power Dimensions Height 64mm Width 141mm Depth 165mm Weight 1kg How to Order 958 TC Selector Switch SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 51 52 AC DC Standard Resistors T Models SRA amp SRB 20 C Eventually all resistance thermometry refers back to one or more fixed resistors These are a key element in any laboratory which measures temperature The resistors need to be very stable with time temperature and transportation and they need to have negligible inductance and capacitance They also need to have a long and successful history of use Wilkins and Swan at our National Physical Laboratory NPL developed a resistor design flexible enough to allow windings with various resistance values to be made available and stable enough to be accepted world wide as resistance standards Particularly important is that the AC DC characteristics are the same up to about 1000 Hz Th
91. id level is within 10mm of the top lid allowing calibration of liquid in glass thermometers without the need for complicated accessories In addition to using a monocular to aid reading the scale l Cal Easy automatic calibration software can capture images with low cost digital webcams The Isotech Orion range provides many features that laboratories need but which other manufacturers often cannot supply Mi Deep immersion depth 470mm 18 5 with low filling costs W Variable Speed Stirring allowing optimum performance for a wide range of liquid viscosities ll Modular design for easier maintenance Over and Under Temperature Protection protect expensive Water Triple Point Cells as well as over temperature conditions Connections for easy drain and overflow ll Automatic Power Up no manual intervention needed easier automation energy saving W Liquid Level to suit Liquid in Glass Thermometers no level adaptors required SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES Calibration Area 90mm The diagram left shows a section view of the Orion showing its ability to house even the largest of cells The cell shown is a Jarrett Isotech B 11 450mm total length and 65mm diameter Model 796L 796M 796H Temp Range 80 C 125 C 40 C 125 C 30 C 300 C Volume 150mm Diameter 470mm Deep 8 5 litres Absolute Stability 0 006 C 0 006 C 0 006 C Methanol 80 C Methanol
92. idges from other labs There are currently two models available the RBC 100 and RBC 400 The RBC 100 covers the range 16 8Q to 1300 ideal for laboratories using bridges with 25 50 SPRIs it has an accuracy of 0 1ppm 0 1mk The RBC 400 covers the range 300 to 400Q for 1000 thermometry and bridges For the latest details visit the Isotech Website A Method for Calibrating Resistance Thermometry Bridges White D R Resistance Bridge Calibrator RBC 100 amp RBC 400 http www isotech co uk S SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 55 ISUT CH 56 The Best Comparison Calibration Equioment Isotech have a range of professionally engineered comparison calibration equipment covering the temperature range 200 C to 1300 C Isotech have equipment to match the requirements of National Metrology Institutes Accredited Calibration Laboratories and in house calibration labs Comparison Calibration With comparison calibration a thermometer with known characteristics is compared to the thermometer we want to calibrate Relying on the Zeroth Law of Thermodynamics There are four Laws of Thermodynamics the Zeroth Law was only formulated in 1931 by Fowler it is more fundamental than the other three existing laws so it became known not as the fourth law but the Zeroth law It states If two systems are in thermal equilibrium each having the same temperature as a thir
93. ies to better than 0 02ppm There are four models to suit all levels of temperature metrology from National Measurement Institutes to those wanting a solution to make low uncertainty temperature measurements in a range of applications In addition to making the best resistance measurements the microK makes high accuracy thermocouple measurements with a voltage uncertainty of lt 0 25uV The microK can be used with all standard thermometer types including SPRIs Standard Thermocouples Industrial PRTS and thermistors Unequalled combination of accuracy stability and versatility First introduced in 2006 the microK is rapidly becomming the instrument of choice at the world s leading NMIs and To be clear as a ratio bridge the microK is drift tree This many commercial laboratories All microK models now is a benefit of the substitution topology used and provides include IEEE 488 General Purpose Interface Bus as well as One of the microK s most exciting features it is inherently RS232 and USB The microK 70 and microK 125 also drift free feature an Ethernet port and can be monitored and consledacrsaec LAN It doesn t have compensation or adjustment circuits it doesn t have software offsets it doesn t self calibrate it Performance by Design Drift Free never needs adjusting never needs a service engineer in ratio measurement it is drift free by design Performance by Design was the mantra and passion behind the devel
94. ign along with new annealing and construction procedures NPL have established the world s first ISO 17025 UKAS accredited calibration services using metal carbon eutectic fixed point cells We are pleased to be able to offer the NPL Pt Pd thermocouple with calibration alongside our own Pt Pt Rh and Au Pt Standards 700mm 720mm Temperature Range Sheath Materials Measuring Junction Reference Junction Applicable Standard How To Order 2M LONG O to 1500 C 4mm x 710mm fits into a removable 7mm x 700 mm protective outer ceramic sheath Enclosed in a Quartz Sheath IEC 62460 Edition 1 0 Model Type NPL Pt Pd Thermocouple Includes UKAS Calibration specify range from either 0 C to 1100 C Uncertainty of 0 2 C Calibrated at Fixed Points Zn Ag and Cu 0 C to 1330 C Uncertainty of 0 2 C from 0 C to 1100 C rising linearly to 0 55 C at 1330 C Calibrated at Fixed Points Zn Ag and Co C 0 C to 1500 C Uncertainty of 0 2 C from 0 C to 1100 C rising linearly to 0 7 C at 1500 C Calibrated at Fixed Points Zn Ag and Pd C SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 37 Thermocouple Standards O to 1600 C d BI Type R and Type S ll Gas Tight Assembly ll Premium Grade Wire The Isothermal range of Thermocouple Standards are the result of many years development The type R and S standards will cover the range from 0 C to 1600 C The measuring ass
95. im Cell Display resolution 0 1 C Cavity size 50mm diameter 300mm deep Time to temperature 4 hours Communications Supplied as standard with serial interface PC adaptor cable and Cal NotePad Power 110 Vac 1 5kW 50 60Hz Inconel Basket 426 04 00 230 Vac Transformer available including insulators Dimensions Height 410mm 230 110V 935 19 43 Width 415mm Transformer Depth 280mm Weight 30 5kgs How to order 426 Oberon High Temperature Furnace Please specify voltage required 94 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES POTTS Ease of Use Using the metal clad slim cells couldn t be easier Long term stability For the past seven years a set of metal clad slim cells have been part of our UKAS Secondary laboratory An automated system puts the cells onto their melt plateau each day every day of the year Complete melts and freezes are recorded each two years as part of our quality assurance program with the following results No change No change No change No change International Intercomparison A set of metal clad slim cells from mercury through aluminium were tested at PTB by comparison to PTB s reference cells All cells were within PTB s uncertainties Their results are summarised Slim Cells AT Uncertainties Hg 137 0 1 5mK In 125 1 4 2mK Sn 132 1 4 2mK Zn 64 0 3 3 5mK Al 160 1 5mK An Example with a Medusa Set the Medusa to a temperature 1 C above
96. in 231 928 C Zine 419 527 6 and Aluminium 660 323 C Active and Passive Safety Circuits Equalizing Block for Comparison Calibration Accessories 420 02 18 Aluminium Bronze Equalizing Block Fan Assembly to cool the thermometer handle Annealing Adaptor 824 01 00 411 01 11B How to order ITL M 17703 Medium Temperature Furnace Please specify voltage required SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 25 26 oe Furnaces al 3 Zone High Temperature E Widest Operating Range B Three Zone Control E ong Plateau Length This more recent addition to our long established range of metrology furnaces offers an alternative for those who prefer 3 Zone furnaces to Heat Pipe technology The three zones create a controlled volume of constant temperature within the furnace in which High Temperature Fixed Points such as Aluminum Silver and Copper can be frozen and melted Because High Temperature thermometers can be easily contaminated by metallic vapors great care has been taken to eliminate the use of metals throughout the calibration volume The cell holder is made of alumina A ceramic equalizing block is available comprising a closed ended tube alumina tubes to house the sensors being compared and alumina powder to act as an equalizing media The sensor for the main controller is a mineral insulated type N thermocouple which has been found to be more stable than the type R thermocou
97. ion Guide on page 73 for information on liquids and important Health and Safety Information Model 820 Accessories Temp Range 30 C 200 C 820 01 Standard Resistor Holder 820 02 Standard Aluminium Equalising Block 820 028 Special Drilling Equalising Block 915 07 Medium Viscosity Oil 40 C to 180 C 915 08 High Viscosity Oil 150 C to 250 C 915 09 VH Temperature Oil 50 C to 288 C Heating time 50 C to 200 C lt 145 minutes VH Oil 932 19 72 Standard Resistor Oil Volume 185 x 140 x 300mm 15 litres Absolute 0 003 C Direct in water 50 C Stability 0 020 C Direct in VH Oil 200 C Uniformity 0 005 C between corners at 100mm depth Communications Includes Serial Interface PC Cable and Software Dimensions 240mm wide 378mm deep 645mm high overall Weight 17kg How to Order 820 Large Volume Liquid Calibration Bath Please specify voltage required Safety Compliant to CE Regulations Power 1kW 108 130 or 208 240V 50 60Hz Refer to Evaluation Report for Full Details 74 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES ISUT CH Liquid Selection Guide When selecting a liquid for a calibration bath a number for factors need to be taken into account temperature range health and safety considerations cost and operating life For a specific fluid its properties such as boiling point viscosity specific heat and expansion coefficient need to be considered If calibrating over a limited range sa
98. ions 144 x 110 x 96mm in box laboratory as references to calibrate other devices Weight 1kg including box 101010 M e 10 el ale Tod The Resistor is held in a temperature controlled environment heated to 30 C 0 1 C other temperatures How to Order are available to special order The heater requires 2 watts 456 Temperature Controlled Fixed AC DC Resistor Please specify ohmic value ab oe ene ep ied sedo Tan State with UKAS Calibration or without UKAS Calibration unregulated DC supply In an ambient of 20 C the Hesistor s heater will warm up in typically 30 minutes and a LED shows when the temperature has been reached A Isotech UKAS Calibration Uncertainties k 2 test pocket is provided so that the resistors temperature i Measured Quantity Range Best measurement can be monitored if required Instrument or Frequency Capability expressed Gauge as an Expanded Uncertainty Stability of 0 1 ppm month or better can be expected Standard models are 10 25 100 1000 10 0000 DC Resistance For other values please contact Isotech 0 1Q to 000 5ppm For the highest quality traceability we recommend that 1kQ to 100k0 A the 456 be UKAS Certified We can offer the 2 Sigma AC Resistance Uncertainties shown in the table 2 50 to 4000 15ppm r000 to 10000 100ppm The latest schedule can be found on the Isotech website or at www ukas org 54 Primary Laboratory SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORI
99. is provided free with each furnace as is a comprehensive handbook The external control system uses power feedback to stabilise against supply voltage changes providing greater stability A digital filter circuit ensures high integrity of measurement correcting for drift and noise SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 79 ISUT CH Introducing Abso ute Calibration with ITS 90 Fixed Point Cells For calibration to the smallest of uncertainties thermometers are calibrated by placing them into a series of Fixed Point Cells For example pure aluminum freezes at 660 323 C so by first melting a cell containing pure aluminum then placing a thermometer into it as the metal changes state from a liquid to a solid a very precise calibration point is realized This absolute or fixed point calibration is performed by National Metrology Institutes providing primary standards and directly realizing the International Temperature Scale ITS 90 Isotech s solutions for Primary Standards are found in a separate publication Volume 1 Solutions for Primary amp Secondary Laboratories Isotech also offer a range of ITS 90 Fixed Point systems that are less expensive easier to use and more robust than the larger cells used by the international NMIs For some countries where the local industry needs are less demanding olim Cells are used by NMIs and Isotech can offer UKAS calibration with uncer
100. is design has been licensed to H Tinsley amp Co who have been producing and have made further improvements to this product since 1970 Isotech are pleased to be able to offer this design of resistor made for us by Tinsley with 1 of 2 calibration possibilities UKAS with an uncertainty of 0 3ppm SRA models NPL with an uncertainty of 0 1 ppm dependant on resistance value TYPE SRA Values 1 10 25 and 100 Ohms 400 Ohms to special order TYPE SRB Values 1000 10 000 Ohms Calibrated uncertainty 0 3ppm see UKAS schedule Accuracy of adjustment 20ppm Stability 2ppm year 0 5ppm year to special order Temperature coefficient 2ppm C of resistance 0 5ppm to special order Recommended 10 mW dissipation Maximum dissipation 1 Watt Approximate load 6ppm Watt coefficient A C D C transfer 1ppm 100 10kO error at 1kHz 5ppm 10 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES Construction Element Strain free immersed in dry oil No 4 Kerosene Top panel Bakelite with PTFE inserts and engraved lettering Terminal Current 0 57A E000 011 Terminal Potential 4BA copper Earth 6BA brass Dimensions Container 114 x 76mm dia Overall 140 x 83mm dia Weight 680g How to order Standard Resistor Please specify type resistance value and calibration option Dew point to 40 C d E Wide Temperature Range li 0 005K Stability Gradients WE Will House Several Standard Resi
101. is model manufactured by the National Physical Laboratory NPL was developed to operate reliably and accurately to 1500 C and offers superior stability to conventional platinum platinum rhodium thermocouples They now can be purchased from Isotech with NPL calibration UKAS with an uncertainty of 0 2 C from 0 C to 1100 C rising linearly to 0 55 C at 1330 C or 0 7 C at 1500 C B Calibration Options Comparison Calibration The Model 1600 includes UKAS calibration to 1100 C with options to extend this to 1200 C or 1300 C The thermocouples are calibrated using comparison techniques in the Isotech 877 Furnace Uncertainties for models with a cold junction recommended are 0 7 C to 1100 C SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES Fixed Point Calibration at the National Physical Laboratory NPL NPLII Matrianal Physical Laboratos y For lower uncertainty calibration Isotech can supply the Model 1600 with ISO 17025 UKAS accredited fixed point calibration up to 1330 C or even 1500 C benefiting from NPL s newly developed high temperature metal carbon eutectic fixed points The uncertainty is then 0 3 C to 1100 C rising to 0 55 C at 1330 C or 0 7 C at 1492 C The fixed points used are Zinc Silver and the eutectic point of either Cobalt Carbon or Palladium Carbon alloys The Platinum Gold Thermocouple can be supplied calibrated with uncertainties of 0 07 C from 0 C to 400 C
102. ite simply the Isotech TTI 22 High Accuracy Thermometer sets new standards in the price to performance ratio for industrial and secondary resistance thermometry If you need high accuracy at an affordable price you have to look at the TTI 22 The TTI 22 has an accuracy of 0 001 C and a resolution of 0 0001 C 0 00004 Ohms It has two input channels is lightweight 1 8kg and will operate for more than 10 hours from two small AA cells It has both RS232 and Ethernet ports oimple to use supporting both Industrial 100 Ohm probe and SPHRIs to ITS 90 25 5 and 100 Ohm Up to 30 probe calibrations can be stored along with the calibration expiry date so the instrument can warn when the calibration time has been exceeded Built in statistics calculation can show you both the measured and average values along with the standard deviation over previous measurements The Isotech TTI 22 is ideal as a reference standard alongside liquid calibration baths for the smallest uncertainty calibration with Dry Blocks or for demanding stand alone measurement applications Previously this level of performance was confined to specialist laboratories with expensive thermometry bridges TTI 22 delivers 5 to 10 times the performance of comparably priced instruments M IheTTIl 22 uses the same patented measurement technique as the earlier TTI 2 E Each measurement performs a zero point and gain correction B The switched polarity DC measuring current
103. l Representation of data Icarus is used at NTPL if you have a recent certificate from Isotech for an SPRT it will have been created with Icarus Icarus has been tested and verified by Isotech and is available to save you lab time and increase confidence The features of Icarus are as a result of requests made from Isotech Calibration Engineers Quite simply if you calibrate SPRTs you need Icarus f UL LM khs 1C ae see Led load umso Rm T on mE Iam ni IPERE I E IDERA EL C Faa ite prz OL A Aem LEE i Fi fl Icarus http www isotech co uk icarus Hepes ae o mmwc cmCEUEIIS 09 ime MEAT DRAAEIGI A IRR EL Dl am Dom e d edm ee mm GC CS ma v EUREN mmm a 5 9 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 97 98 Calibration Software Cal NotePad s Mate ad WE Easy to use Win98 Win XP W Interface to Isotech Block Baths amp Temperature Indicators B Log Chart and Export data Control Calibration Bath Read Standard The purpose of Cal NotePad CNP is to automatically log and display the temperature of an Isotech calibration bath together with the unit under test Cal NotePad can be used with baths or indicators without PC interfaces by the user typing in values from the keyboard The Cal NotePad can be used to identify the operator and the unit under
104. llium Cell Kit TEMPERATURE C Slim Cell Kit nttp www isotech co UkK 66 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES otirred Liquid Baths d Orion 796 E Can accept large Water Triple Point Cells lll Variable Cooling Power B Low Filling Cost The Isotech Hydra range of calibration baths have proved very successful since their introduction in 2003 The Orion range has been introduced to fit alongside the Hydra models The Orion calibration baths offer deeper calibration volumes than the Isotech Hydra series with world class temperature stability There is a high temperature model 30 C to 300 C and two models with built in refrigeration 40 C to 125 C and 80 C to 125 C These deep stirred liquid baths are suitable for the low uncertainty calibration of long thermometers including liquid in glass and extended length SPRTS The Orion unit has sufficient depth 470mm 18 5 to accommodate Isotech s largest Water Triple Point Cells providing a cost effective sub mK calibration system There are accessories to hold Mercury Water Gallium and Indium ITS 90 Fixed Point Cells Isotech baths have always been designed for thermometer calibration setting the standard for immersion depth versus filling costs As the Orion requires just 8 5L of fluid it offers significant cost savings both initial and the on going running costs when compared to other larger volume baths In operation the liqu
105. low temperatures was expensive unsafe and unreliable Our solution is a simple heated metal block design using a single safe surrounding liquid liquid nitrogen An apparatus immersed in liquid nitrogen will cool to approximately 195 C Our design using a controller and heater permits the cryostat to be set at any temperature above liquid nitrogen temperature The Cryostat comprises an insulated machined copper equalizing block inside an 80mm diameter tube 480mm long attached via a flange to a lid giving access for three thermometers a vacuum port and a Lemo connector for the temperature sensor and heater A cable runs to a controller which sets the temperature An RS422 connector permits the calibration to be automated using one of our Software programs Optional Container for Cryostat Evaluation The most used range for the Isotech Cryostat is between 80 C to 180 C This temperature range is selected Negli uis because Oxygen condenses at 186 C and if this is then Cryostat Temperature 80 C to 180 C accidentally boiled off it can cause a health and safety Absolute Stability 0 005 C at 80 C issue The performance of the Cryostat actually improves over 30 minutes 0 0015 C at 150 C as the temperature is lowered because the temperature as measured by one of the 670 thermometers in the bottom of one of difference between Cryostat and it s surrounding liquid the pockets of the cryostat nitrogen is smaller The
106. ly Proven Cells The Jarrett Isotech cells have been in production since 1958 A independent comparison in 1981 showed the first cell to be within 0 000006 C of the reference cell The most recent international study organized by BIPM consistently shows labs using both recent and older Jarrett Isotech cells tightly grouped tens of uK around the BIPM reference value International comparisons prove the quality of the Jarrett Isotech Cells and are unique in the number and history of comprehensive evaluations Reproducibility of Some Triple Point of Water Cells By George T Furukawa and William R Bigge Temperature Its Measurement amp Control in Science amp Industry Vol 5 1982 Final Report on CCT K7 Key comparison of water triple point cells M Stock et al 2006 Metrologia 43 03001 Quality The capability of a triple point of water cell to provide an accurate stable and reproducible temperature depends upon the purity of the water in the cell Jarrett Isotech cells are carefully cleaned and aged by a special procedure They are then filled with water that has been purified by an elaborate 12 step process designed to eliminate the possibility of contamination while avoiding change in Isotope proportions Isotopic Content Jarrett Isotech Cells use water with an isotopic content essentially similar to Standard Mean Ocean Water Following research by the international science community into the make up of Standard
107. m Apparatus is not an adaptation from general purpose equipment but is designed specifically to realize and maintain the Gallium Cell on the melt plateau for calibration of thermometers on the International Temperature Scale of 1990 The apparatus will permit the gallium to melt coaxially over 12 to 16 hours It is uniquely designed to also freeze the cell from the bottom up which eliminates the danger of damage due to the expansion of gallium during freezing 1 Model 17401 Gallium Cell may be used without the thermal environment provided by Model 17402B Gallium Apparatus in a well controlled bath However the advantages of automatic operation convenience and cell protection recommend the use of the Model 17402B environment in most cases 2 No external connections other than power are required 3 A completely automatic electronic control system provides a precise means for realization and maintenance of the plateau The Apparatus can be turned on by a timer an hour before the laboratory day begins the plateau utilized throughout the working IRIE JING HPI GERI ars spots WUE day and the system recycled overnight A thermal sink Temperature Range 29 7646 C is provided which forces the gallium to refreeze Uncertainty 0 25mK upwards from the bottom gallium expands when it with cell freezes requiring a specific freeze orientation to avoid l R 3 rupturing the cell Ambient Limits 15 C to 28 C Cycle Time With cell
108. mK In 0 5mK Sn 0 3mK Zn 0 5mK Al 0 7mK Ag 1 1mK For SPRTs 0 5mK non uniqueness of ITS 90 between fixed point of water and gallium 0 5mK 2 oxide state When selecting equipment the uncertainties should match the above This is because uncertainties are combined using root sum of squares So if an uncertainty is much larger than the above it will dominate the rest if it is very small it becomes insignificant 4 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES Equipment Required Can be grouped under four headings 1 An accurate electrical measuring system 2 A number of ITS 90 fixed point cells 3 Apparatus to melt freeze and maintain the cells 4 Stable thermometers to monitor the cells When selecting the equipment for the laboratory look at performance uncertainties and price The Electrical Measuring oystem The Bridges A ratio bridge that compares a temperature controlled stable fixed resistor to the SPRT under test is ideal Bridge linearity noise and stability are the main things to consider The uncertainty should be of the order of 0 1ppm The Isotech microK 70 is the ideal solution it contributes just 0 07ppm to the measurement uncertainties with noise and linearity and uniquely it is drift free It has input 3 channels extendable to over 90 with Introduction continued microsKanners and with no mechanical switches relays potentionmeters or moving part
109. measurably small 4 Using external reference resistors SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES Channel Expander microsKanner 200 to 1800 C d E Expandable to 90 channels ll Supports PRTs thermocouples amp thermistors ll Plug and play operation The microsKanner can be used with any member of the microK family to add further channels up to a maximum of 90 expansion channels Easy to Use The use of plug and play technology means that the extra channels appear automatically on your microK bridge when connected to a microsKanner You can configure the new input channels in exactly same way as any of the microK s existing inputs through the microK s touch screen or a PC via an RS232 connection You just plug in a microsKanner and immediately gain the benefit of the additional channels making this the easiest channel expansion system of its type Accurate Ihe microsKanner replicates the input system of the microK bridge for all 10 of its input channels Measurements made with a microsKanner are therefore to the same accuracy as the microK bridge it is connected to By adding further scanners the microK system can be expanded to 92 channels without losing measurement performance Versatile Like the microK bridge the microsKanner works with PRTs thermocouples and thermistors giving you unparalleled flexibility Keep Warm Currents The micosKanner has 10 individually programmable keep warm curr
110. minute at 100 C 50 L max Communications Includes Serial Interface PC Cable and Software Dimensions 580mm Wide 640mm Deep 1570mm High 880mm to Top Panel Weight 85kg including 22Kg of Alumina Powder Safety Compliant to CE Regulations Power 3kW 3 x 1kW heaters 208 240V 50 60Hz How to Order Model 875 Fluidized Calibration Bath Refer to Evaluation Report for Full Details 76 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 875 07 875 08 Accessories The following options are available 875 09a Adjustable height aluminium bronze equalising block 875 02 875 03 875 04 875 06 875 07 875 08 Eight 8mm pockets x 240mm deep Calibration Tube As fitted as standard This enables a calibration volume of 67mm inside diameter and 475mm deep This calibration tube is supplied and fitted as standard Oil free compressor and connecting tube Used to supply air to the fluidized bed where an independent air supply is not available within the laboratory Alumina powder specifically chosen for this application supplied in a 25kg container Liquid in Glass Thermometer Support Gantry System consisting of a multi tube probe holder with ten 10 80mm by 470mm deep pockets four support pillars and an adjustable stainless steel gantry with holes corresponding to the probe holder to locate up to ten thermometers simultaneously Thermometer collars and O rings 10 off are included with the assembly The
111. minutes 40 C 30 minutes 60 C 40 minutes 80 C 60 minutes 100 C 90 minutes At 0 C x0 03 C 30 minutes At 90 C x0 02 C 30 minutes 0 01 C 0 C 0 1 C 90 C 0 2 C 35mm diameter x 160mm deep Excludes Insulating Cap 6 thermometer wells as standard 9 5mm 8 0mm 6 4mm 6 4mm 4 5mm and 4 5mm All 157 deep 200W 100 240Vac 50 60Hz 215mm W x 420mm D x 640mm H 22 7kg SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 63 64 Stirred Liquid Baths 915 Parallel Tube 65 to 300 C B Three Models Covering 65 C to 300 C ll Excellent Uniformity ll Uncertainties to 0 0005 C The 915 is no question the finest stirred liquid parallel tube bath produced Using best practise ratio methods of comparison calibration uncertainties of less than 1mK can be obtained The bath can also be used to realise ITS 90 Fixed Point Cells Mercury to Tin Points with absolute uncertainties to less than 1mK The Isotech Parallel Tube Liquid Bath is a development of the previous 815 model and has many features which enhance its performance and enable ease of operation It is suitable for the calibration of Liquid in Glass Thermometers Industrial Platinum Resistance thermometers Standard Platinum Resistance Thermometers Thermocouples and Industrial Temperature sensors It can also be used with fixed point cells The temperature range of the standard 915 liquid calibration bath 915H is 40 C to 300 C
112. mp SECONDARY LABORATORIES 50 to 700 C fe Medium Temperature E Wide Operating Range B Three Zone Control B ong Plateau Length The Medium Temperature Furnace is of three zone design In addition to the main temperature controlled zone there are guard heaters at the top and bottom of the block These zones are controlled by differential temperature sensors which enable the furnace to operate with just small temperature differences along the whole length of the heated metal block This is important when freezing cells since the assumption made is that cells freeze in concentric shells This is true only if there is a small temperature gradient along the furnace The substantial furnace core is machined from aluminum bronze The recommended procedure for establishing a freeze plateau requires operator attention until the plateau is realized Following that the Furnace will maintain the plateau essentially automatically for a period of 10 to 20 hours longer if the heat flux from the Cell minimised Equalizing Block Model ITL M 17703 Temperature Range 50 C to 700 C Uncertainty lt 1mk with cells Control 0 1 C Resolution Included as standard 3kW 108 130 or 208 240 VAC 50 60Hz 54 7 x 420mm Height 960mm Width 600mm Depth 560mm Weight 115kg Communications Power Core Size Dimensions ey eee ee Furnaces Fixed Points of Indium 156 5985 C T
113. multi tube probe holder described under 875 06 is available separately upon request Monocular and Support Useful for viewing and magnifying the liquid column within the thermometer being calibrated This ancillary piece of equipment is used in conjunction with Note The bath is fully commissioned tested and charged with the correct amount of aluminium oxide powder before despatch SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 11 i Thermocouple Calibration Furnace d ll Accuracy 0 25 C at 1000 C ll Central Zone of Zero Heat flux lil Range 100 C to 1300 C The Saturn spherical furnace comprises a number of concentric shells The outer shell 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 In the centre of the furnace is a solid cast ceramic sphere with 8 or 16 tubes to be used for the thermocouples requiring calibration Isotech s calibration furnace is revolutionary from a number of aspects It is spherical and its design ensures a central zone of constant temperature Thermocouples are inserted around the circumference of the furnace When fully inserted the measuring junctions are within a few millimeters of each other at the centre of the sphere Up to 15 thermocouples can be calibrated simultaneously The accuracy is between 0 25 C and 0 1 C at 1000 C Larger tube diameters
114. n of thermometers Monocular and Support Useful for viewing and magnifying the liquid column within the thermometer being calibrated This ancillary piece of equipment is used in conjunction with 915 02 Liquid in Glass Thermometer Support Kit Calibration Tube Cover The cover consists of a square enclosure containing baffles and fits over the calibration tube area insulating the circulating liquid from ambient air Access for temperature probes remains at the top of the enclosure An equalising block may also be supported from this assembly Maximum operating temperature 180 C Medium Temperature Silicon Oil Temperature Range 40 C to 180 C Flash Point 300 C High Temperature Silicon Oil Temperature Range 150 C to 250 C Flash Point 315 C Very High Temperature Silicon Oil Temperature Range 40 C to 288 C Flash Point 288 C Controller provides 0 01 C resolution over the full temperature range with enhanced short term temperature Stability NOTE Read all safety information concerning liquids which you intend to use in the bath and use only approved liquids Fixed Point Calibration ITS 90 Cell Basket Assemblies Excluding 915 05 43 915 05 44 915 05 41 915 05 40 915 05 39 915 05 38 915 05 42 Cells Small Mercury Cell Kit Large Mercury Cell Kit Small Water Triple Point Cell Kit Large Water Triple Point Cell Kit ee nen een Po RECOMMENDED LIQUIDS Small Gallium Cell Kit 100 0 100 i 200 300 Large Ga
115. nation but an Internationally accepted embodiment of an ITS 90 fixed point The Isotech cells have been further developed and refined from cells designed and manufactured by Henry Sostmann with the first international inter comparison results being published in 1972 In 2007 we combined 17 years experience of producing the best Metal Clad Slim Cells with our experience of producing the most accurate Fixed Points sealed in quartz glass to introduce Metal Clad Optimal Cells for the Primary Laboratory These cells can be readily shipped between labs for intercomparisons overcoming the difficulty of transporting Quartz Cells due to the increased airport security restrictions Isotech s accredited laboratory has the smallest uncertainties and can issue UKAS certificates with uncertainties as low as 0 07mK at 0 01 C to 2mK at 961 78 C k 2 Uncertainties Optimal Cells include a conformity certificate which includes a reference cell This takes a minimum of 15 days of a copy of the impurities analysis a copy of the metal of laboratory time the cell evaluation freeze and melt curves Where required TE With i we can also provide UKAS calibration ith our Standard Comparison service we perform one melt one freeze and one intercomparison the time to calibrate The uncertainty mentioned in the table is that which can be is less than the Premium Service and so the cost is lower offered with our optional UKAS Calibration service Our
116. ndium or the tin plateau essentially automatically for a period of 10 to 12 hours and the zinc plateau for 6 to 8 hours 1 The furnace core into which the freeze point cell is inserted is of aluminium alloy which provides a very low thermal gradient along the core length The main furnace heater is of the parallel tube design as used at NIST A pre warming tube is provided 2 An advanced proportioning electronic control system regulates furnace temperature using a platinum resistance thermometer as sensing element The controller may be calibrated in situ using Freeze Point Cells as references Two entirely independent over temperature safety devices are included A dedicated on off over temperature control circuit provides active safety A fusible link in the main power circuit provides passive Model ITL M 17701 safety Temperature Range 50 C to 500 C taint lt 1mk with cells 3 The Low Temperature Furnace is completely self uL wi contained castor mounted and requires no external Control 0 1 C Resolution supplies except power Communications Included as standard Power 1 5kW 108 130 or 208 240VAC 50 60Hz Core Size 54 7 x 420mm Dimensions Height 960mm Width 600mm Depth 560mm Weight 115kg Accessories 411 01 11 Annealing Adaptor 824 01 00 Fan Assembly Annealing Adaptor How to order ITL M 17701 Low Temperature Furnace Please specify voltage required 24 SOLUTIONS FOR PRIMARY a
117. ned so that the inner wall is not subject to thermal expansion stresses from the outer wall before the heat pipe reaches conduction temperature The working fluid is permanently and safely sealed within the plasma arc welded enclosure Three temperature ranges are available B Low Temperature 125 C to 250 C Water B High Temperature 400 C to 1000 C Potassium E Very High Temperature 500 C to 1090 C Sodium An advanced proportional electronic control system with digital filtering controls the furnace temperature Power feedback is used to stabilise against supply voltage changes Two entirely independent over temperature safety circuits are provided Dual Furnaces In addition to heat pipes described above the Dual Furnaces incorporate a second furnace which because of its unique design will safely and without contamination pre and post condition the thermometers To complete the apparatus a further pre warming tube with a temperature approximately equal to that of the heat pipe made of a unique and gas tight material is provided together with a storage rack for 4 thermometers Equalizing Block 22 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES Method of operation The cell is melted when melting is complete the heat pipe temperature is readjusted to be 0 5 C below the freeze temperature of the cell A cold rod introduced into the cell s re entrant tube initiates the freeze to give a plateau
118. nel status is indicated via front panel LEDs The PRT Switch has 4mm terminal posts that can accept bare wires or 4mm plugs The thermocouple switch has eight miniature thermocouple connectors These thermocouple connectors are thermally bonded to a platinum resistance thermometer that measures the temperature of the connector and hence the cold junction The TTI range temperature indicators feature the ability to measure a remote cold junction and this permits a mixture of thermocouple types to be connected through the box The l Cal software supports Switchbox models 954 and 958 and for automatic operation two boxes can be connected together with a master slave lead allowing them to be controlled from a single RS232 port and up to 16 sensors to be switched The software can automatically switch between the boxes and connect the appropriate output to the T TI This 16 channel operation is not convenient without the software and manual operation of two boxes together is not recommended Model 954 RTD Selector Switch Channels Eight four wire four pole Control Front panel switch And RS232 Connectors 4mm Terminal post Internal Circuit lt 250mQ Resistance Thermal EMF typical 2uV after 1 minute of channel set 6uV after 30 minutes of channel set 5 VDC 100 250 VAC 50 60Hz Power Power Supply Included Dimensions Height 91mm Width 141mm Depth 165mm Weight 1kg How to Order 954 RTD Selector Switc
119. ntrol of refrigerant flow providing inherently fail safe operation Indicators provided for the cryostat are POWER ON and COOLING The cryostat provides convenient conditions for operating mercury fixed point cells both in heating and in cooling mode Model ITL M 17725 Apparatus Temperature Range 36 C to 42 C Uncertainty 0 22mK with cell Ambient Limits 18 C to 28 C Plateau Duration 8 12 hour Plateau Power 750W typical 208 240 VAC 50 60Hz Dimensions Height 960mm Width 600mm Depth 560mm Weight 96kg How to order ITL M 17725 Mercury Triple Point Apparatus O II SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 15 ISUT CH 16 The Best Primary Standards for your Laboratory The key factor is that of purity ITS 90 specifies that the purity of the ITS 90 fixed points should be 99 9999 6N The performance of an optimal 6N pure cell has been best described in CCT 2000 13 Optimal Realization of the Defining Points of the ITS 90 All Isotech s cells for primary laboratories conform to the ideals set out in this document To prove to ourselves and you our customer that this is So we compared some 160 UKAS certificates over 10 years using a variety of metal samples to CCT 2000 13 The results tabulated below show that we equal or exceed the values given in that document CCT 2000 13 Optimal Realizations of ITS 90 Comparison of 160 Isotech UKAS Certified Cells to CCT 2000 13 C
120. o be realized both easily and safely Total Confidence The embodiment of the Mercury Triple Point Cell was originally developed in the US with a very close cooperation between Henry Sostmann and Dr Furukawa of N B S now NIST over twenty years ago The physical size materials and metal purity are identical to this original design The Mercury is distilled four times leaving impurities of 10 to 15 parts per billion The cells made by Isotech still use the original design purity and supplier of Mercury In international intercomparisons the cells made by Isotech have always been within the National Laboratories uncertainty of calibration and with over 20 years of successful use throughout the world the cell embodies the finest traditions of production and use After more than 20 years Dr Furukawa opened some of the original cells and the Mercury was still above 99 99995 pure A reflection of the long term performance of the design Operation The cell can be realized in an Isotech stirred liquid bath such as the Hydra or 915 with plateau lengths of up to a week For convenience and to avoid the need to use a liquid the dedicated Isotech Mercury Triple Point Model ITL M 17724 Apparatus can be used This equipment is in use in many Temperature 38 8344 C NMIs and commercial labs Metal Purity gt 99 99999 7N Dimensions Outside Diameter 40mm atio CE BI Tea 3236 9 5mm Total Height 475mm Metal Depth 200mm Uncertainty 0 2
121. ocouple characteristics are sufficiently smooth to allow interpolation of deviations from the reference table to be carried out over fairly wide temperature spans without introducing unacceptable errors Isotech can offer a 4 point UKAS calibration for temperatures up to 1100 C supplied as standard a 6 point UKAS calibration up to 1300 C with the option of a table of millivolts to degrees Celsius in 10 C steps or alternatively arrange for an NPL calibration at fixed points see page 36 Please contact Isotech to obtain current prices for calibration Platinum Platinum Rhodium Type R amp S Standard Thermocouple Model 1600 Premium grade wire gas tight assembly No intermediate junctions iv arm ow ld E i s oc 7 en MERES Pi r A STANDARD b00 800 1150mm THERMOCOUPLE V300 300 1450memn Also available without the physical cold junction Specify No Cold Junction NCJ Model 1600 Hot Sheath Temperature Range 0 C to 1600 C R or S Emf Vs Temperature According to relevant document Response Time 5 minutes Hot Junction Dimensions see diagram Connecting Cable see diagram Cold Junction 250mm long x 4 5 diameter Copper Extension Wires 2000mm Immersion 100mm min Case Dimensions Height 65mm Width 710mm Depth 165mm Gross Weight 900g Feature Removeable inner assembly The standard thermocouple described can be supplied in the following noble metal combinations TYPE R T
122. ons external 0 C reference 1 The milliK can connect to Isotech temperature sources Dry Blocks Liquid Baths and Furnaces Can cycle the bath through a series of temperatures logging the data all without a PC 4 Safety The milliK inputs are galvanically isolated with the 4 20mA input separately isolated avoiding problems with high voltage pick up common when using thermocouples in temperature furnaces systems or the millik can measure the junction with a probe on an unused channel useful for automated systems 21st Century Design Utilising a powerful internal operating system and fast 32 Bit processor the milliK has the power and capacity to overcome the memory limitations of older instruments Store Probe Data There is sufficient memory for an almost unlimited number of standard probes allowing the storing of calibration data for both resistance thermometers and thermocouples The digital matching of probe data allows the instrument to show the true temperature The instrument will warn if a probes calibration time has expired Data Logging Older instruments are limited to a maximum number of logged data points the milliK is limited only by storage space The internal memory can store more than six months of data and with a low cost USB Memory stick the millil amp can log continuously for a lifetime 2 Wide range of sensors The milliK can use Standard Reference probes and re
123. opment of the microK On Day 1 a For more details read Using a Substitution Measurement decision was made no tweak pots such as used on AC Topology to Eliminate the Effect of Common Mode Errors Bridges to correct for flux leakage no software in Resistance Measurements used in Temperature adjustment no self calibration but performance by design Metrology available on the Isotech Website which also The microK achieves its resistance ratio accuracy by explains why the performance of the microK is superior to design not adjustment and is uniquely drift free DC potentiometric instruments Key Features B Resistance Thermometry B Three Input Channels 0 10 0 250 10 10Q 25 50 1000 Best Practice Ready SPRTs Expandable to 92 ndustrial PRTs Thermistors EE Intuitive Touch Screen Operation B Voltage Measurement Store all Standard Thermometer and Laboratory Standards Platinum Standard Resistors internally Rhodium Platinum Gold and Base Log to internal memory or USB Metal Accuracy to 0 25uV Memory Drive B Display Modes B Reliable Numeric and Graphical 21st Century Solid State Design no Ratio Resistance Voltage C F K moving parts B Stable ZERO drift in ratio measurement 42 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES Performance by Design More Advantages In making ratio measurements other benefits by design include B Zero Hysteresis There is no hysteresis effect by de
124. otech 670 amp 909 families and other SPRTS of similar stability FIXED POINT Fixed Point C Range Range Range REO Range 1 2 3 4 5 Typical Uncertainties BP Nitrogen 195 798 10mK 10mK TP Mercury 38 8344 2mK 2mK TP Water 0 01 1mK 2mK MP Gallium 29 7646 FP Indium 156 5985 3mK FP Tin 231 928 3 5mK FP Zinc 419 527 FP Aluminium 660 323 FP Silver 961 78 Note 1 Model 96178 or other HTSPRTS of similar stability Note 2 Alternatively in place of TP Argon the BP Nitrogen point can be used the uncertainty increases to 5mK for Ranges 2 to 4 and The latest schedule 6mK for Range 5 can be found on the l Isotech website or at www ukas org TP Triple Point MP Melting Point FP Freezing Point BP Boiling Point SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 17 ee ixed Point Cells n Sealed and Open ll Ultra Pure gt 99 9999 6N ll 35 Year Plus History ll For Optimal Realisations Isotech Ultra Pure Metal Freezing Point Cells are designed specifically to realize the liquid solid equilibrium temperatures of certain high purity metal elements for calibration of thermometers at the ITS 90 Fixed Points When you purchase an Isotech Sealed Freeze Cell you are not just purchasing a kilo of metal inside a graphite crucible sealed within a quartz shell you are getting the fruits of more than 35 years of experience and learning of not only how to make such an artifact without introducing contami
125. outer tube and flows up an inner concentric tube The heating and cooling takes place in the outer tube leaving the inner tube as the calibration volume into which the thermometers are immersed This design gives very small vertical and axial temperature gradients ll The following pages describe the Isotech range of comparison equipment Photograph by kind permission of ThyssenKrupp Steel AG Werkstoffkompetenzzentrum SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 57 Immersion Deptn When selecting a liquid bath ensure that it is deep enough to provide low uncertainty calibration The Supplementary Information for the ITS 90 BIPM states conduction down the sheath is usually such as to require deeper immersion Immerse the ioi between 50 C and 9 at 200 C and above ter from 15cm to 20cm C and from 20cm to 2 cm http www isotech co uk links k Guide can be downloaded via the above link or directly from http www bipm org en publications its 90 html 185 to 196 C d Bolling Point Apparatus E Boiling Point of Liquid Nitrogen ll Gas Manifold for Thermometers ll Self Contained Bench Mounted Isotech Nitrogen Boiling Point Apparatus is designed specifically to realize and maintain the liquid vapour equilibrium boiling point of nitrogen or argon for the calibration of thermometers on the International Temperature Scale of 1990 The Boiling Point
126. peratures and this is our recommendation If an oil is used below the dew point water will condense into the open bath If the bath is then used above 100 C the expansion of water present in the bath to steam can force the liquid from the bath creating a serious hazard This is true for all open oil baths and the reason why Isotech do not recommend using an oil both below the dew point and then above 100 C Maximum Temperature 180 C 250 C 288 C 140 C 200 C SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 75 Fluidized Calibration Bath 50 to 700 C d ll Wide lemperature Range High Accuracy Model 875 lll Safe sealed no powder loss into laboratory ll Comparison Calibration or use with Fixed Points The Isotech fluidized calibration bath out performs dangerous salt baths in all respects wider temperature range less hazardous and better uncertainties The bath is the result of 20 years research and development into flow patterns powder technology and filtration Recent developments have enabled the baths facilities to be extended even further it is now eminently suitable for Liquid in glass thermometer calibration To achieve this the filter and exhaust system were re designed to cope with the increased level of powder needed for Liquid In Glass thermometer calibration The result is a calibration system to National Standards The performance is only matched by heat pipe technology The p
127. ple In addition two slave controllers compensate for any temperature gradient along the furnace by eliminating any temperature difference that they sense There is a cooling coil in the lid with connections to circulate tap water to keep the furnace lid cool protecting the SPRT and reducing heat load into the lab A flow of 0 5 to 1 litre per minute is required at temperatures above 700 C Long plateaus from Fixed Point Cells Self Tuning controller optimizes each Fixed Points performace This 3 Zone Furnace can be used for the realizations of 3 zones controlled to compensate for end loss to give a perfect profile Tin Zinc Aluminum Silver Gold and Copper points or with an optional equalizing block used for annealing or comparison calibration Model 465 Dimensions Height 960mm i Width 600mm Temperature Range 200 C to 1200 C Depth 560mm Uncertainty lt 1 to 2mk with cells Weight 115kg Control 0 1 C Resolution Furnace Depth 500mm Accessories 100mm 465 04 00 Cell holder assembly 465 02 06 Ceramic Equalizing Block Diameter Communications Included as standard Power 110VAC 50 60Hz 3kw or 230VAC 50 60Hz 3kw How to order with internal transformer 465 3 Zone Metrological Furnace option SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES P a QW y Furnaces Annealing Amb to 1000 C ll Designed to pre warm and anneal Standard Platinum Resistance Thermometers B Main
128. range of oxide growth to the level at which the oxide dissociates the 670 is filled with a unique argon oxygen mixture A 2 5 metre length of low thermal EMF high temperature screened cable is connected in the handle via a strain relieving transition to the all pure platinum construction of the thermometer Gold plated U shaped terminals complete the cable construction and the 670SQ is delivered in an elegant soft lined carry case of our own design A 670SQ is supplied only after a stabilising process which is complete when the reproducibility of RrPw is within 0 0005 C after excursions to the extremes of its Models 670SQ 670SH 670SL temperature range Values of RrPw and Wga are routinely provided with the 670SQ ud SUA AS The 670SQ can be supplied with RrPw and Wga only or Aus loses ee renee a with full UKAS calibration With calibration means that Resistance Ratio Wga gt 1 11807 you will get an Internationally accepted Fixed Point as required by ITS 90 calibration For best accuracy recommended maximum measuring currents for the 670SQ are 1mA for the 25 50 Ro and 0 5mA for the 1000 Ro Sensitivity 0 10 C 25 50 0 40 C 1000 L i 001 i A comprehensive handbook and tutorial will help you get saepe ron oo Ve eano the very best performance and stability from your 670SQ on use The 670SQ 650mm long is our recommended SPRT How to Order offering ultra stability and has superior vibration shock Model 670SQ
129. rature Indicator Units C F K Absolute stabilities over 30 minutes Communications Supplied as standard with serial Metal Block Bath 0 03 C interface PC adaptor cable and Stirred Liquid Bath 0 025 C Cal Notepad Ice Water Bath 0 001 C Power 300W 108 130 or 208 240 VAC Controller Resolution 0 1 to 0 01 4 digit display Indicator Resolution 0 1 to 0 01 4 digit display Black Body Source 0 3 C 50 60Hz Surface Sensor 0 5 C Dimensions Height 430mm Calibrator Width 310mm Depth 300mm ITS 90 Fixed Point zu 00 0 0 204 0 Weight 17kg Heating Cooling See Graph Stabilisation Times 10 minutes How to order Calibration Volume 52mm x 300mm deep 580 Oceanus 6 POTTS Please specify voltage required 90 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES ISUT CH Type B 12 Water Triple Point Cell Oceanus 6 Cool Down Graph 12 5mm MELLEL qd Oo 2 N 3 Time hours Gallium Cell Accessories Metal Block Bath Standard Insert 6 x 8mm holes x 250mm deep Adjustable Equalising Block Non standard Insert please consult Isotech Stirred Liquid Bath Stirred Liquid Container For alcohols water amp oils C10 Oil 35 C to 140 C 1L required Liquid in Glass Thermometer Support kit Stirred Ice Water Bath Stirred Liquid Container For alcohols water amp oils Liquid in Glass Thermometer Support kit Blackbody Source Blackbody Target Surface Sensor Calibrator Surface Sensor Calibrator Kit ITS
130. rofiles are so small that the bath has been used by National Laboratories for fixed points of Indium through Aluminum with great success In comparison mode 2 sigma uncertainties of 0 020 C at 300 C and 0 035 C at 660 C can be obtained This is the only product capable of covering a very wide temperature range without a change of thermal media A disadvantage of many fluidized bed baths is that good Like most fluidized bed baths the 875 bath consists ofa temperature stability and uniformity cannot be achieved in the container of aluminum oxide powder with a porous base fluidized medium itself They are obtained by using large metal plate Sufficient air is passed through the base plate to blocks or by inhibiting the fluidizing action in the powder around motivate the powder into a fluid like state so that it will the work piece either locally or by completely collapsing the flow display buoyancy effects and have good heat bed at the required temperature this is not the case with the transfer characteristics 875 A full evaluation report is available upon request Model 875 Temp Range 50 C 700 C Volume 875 02 67mm diameter 475mm deep Absolute Stability 0 005 C at 150 C In Equalising Block 0 005 C at 450 C 875 09a 10 Minutes 0 020 C at 660 C Vertical Uniformity 0 005 C at 350 C 0 005 C at 420 C 0 026 C at 660 C Heating time 50 C to 700 C lt 240 minutes Compressed Air Supply 1 BAR 30 litres
131. roved safety and noise immunity High Resolution The display resolution is 0 0001 C 0 1mK made possible by using a powerful Sigma Delta Analogue to Digital converter to achieve a true measuring resolution of just 28uQ equivalent to 0 00007 C 0 07mkK for PRT inputs Automation The millik is compatible with l cal EASY and the Isotech range of PRT and Thermocouple Selector Switches enabling users to build fully automatic calibration systems for up to 32 temperature sensors with the ability to calculate coefficients and print tables and certificates 48 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES Reliable Like the award winning microK range the milliK is all solid state There are no mechanical relays switches or potentiometers which would reduce reliability Input Connectors No compromise design ruled out lower cost problematic connectors and the SPRT PRT inputs are via the highest quality gold plated push pull self latching circular connectors overcoming the problems seen elsewhere where thermometers have been designed to a budget Outstanding CJC Performance and Flexibility Again the no compromise design philosophy led to a specially developed rugged thermocouple connector made from alumina and incorporating the same type of platinum sensor as used in Isotech precision probes ensuring optimal cold junction accuracy Three CJC modes allow thermocouple operation with internal automatic compensati
132. s Reference Cell with the Standard at NIST showed an agreement of 4uK 0 000004 C The Isotech Gallium Cells contain the highest purity metal gt 99 99999 pure 7N and giving a flat plateau The cell has a day to day reproducibility of just 0 000025 C Quality Developed in the 1970s by Henry Sostmann the design is of the highest standard The metal is contained within a resilient inner housing that ensures no contamination or reaction with the Gallium The surrounding outer metal sleeve provides longitudinal uniformity of temperature and further mechanical strength With several hundred cells shipped to all parts of the world all have arrived Sealed Gallium Open Gallium Model ITL M 17401 ITL M 17401 0 without damage Temperature 29 7646 C 29 7646 C Sealed Cell Metal Purity gt 99 99999 7N gt 99 99999 7N In general we recommend the sealed cell it has the Dimensions convenience of the sealed construction along with the Outside Diameter 38mm 35mm sub mK performance Inside Diameter 12mm 12mm Total Height 420mm 425mm Open Cell Metal Depth 230mm 230mm Uncertainty 0 25mK 0 07mK A re sealable or open cell is also available The cell has a valve and a Klein flange fitted at the top allowing How to order connection to a vacuum system and pure gas supply ITL M 17401 Gallium Cell Specify sealed or open This permits the pressure to be to set to one bar at the melt temperature or measured in accordance with
133. s is the most reliable product available Fixed Resistors The best resistors are made for us by Tinsley and we can UKAS certify them to 0 1ppm or better Even fixed resistors have a tempco and SO we offer a maintenance bath The maintenance bath needs to be monitored using an SPRT It can be connected to the one channel of the microK to save cost You now have a world class measuring system To maintain it the resistors will need regular recalibration every year or two years The SPRT can be recalibrated in your own fixed point cells at water and gallium The microK can be rechecked by you using compliment checks with your fixed resistors Fixed Point Cells ITS 90 gives 7 optional ranges check the graph on the inside front cover and select the range for your laboratory Every primary laboratory needs water triple point and the gallium melt point because to qualify as an ITS 90 SPRT a thermometer must have a W Gallium equal to or greater then 1 11807 Mercury triple point is the next most useful temperature Isotech is unique in offering the other commonly used fixed points of Indium Tin Zinc and Aluminium in choice of 4 housings E Open quartz Open metal clad WE Sealed quartz W Sealed metal clad You will find full details on the following pages see Isotech s technical library on the website for a comparison of our UKAS results of quartz clad and metal clad cells compared to CCT 2000 13
134. s the 670 Range and the 96178 An acceptable platinum resistance Segno must be made from pure strain free platinum and it must satisfy at least one of the following two relations W 29 7646 C x 1 118 07 m W 38 8344 C 0 844 299 8 An acceptable platinum resistance thermometer that IS to be used up to the freezing point of silver must also satisfy the relation W 961 78 C x 4 2844 8c Thermocouples In practise Standard Platinum Resistance Thermometers Model 1600 Platinum Platinum Rhodium SPRIs are constructed to cover sub ranges of the ITS 90 Available as Type R or Type S these thermocouples are and SPRITs are available in different construction types housed in a 99 7 recrystallized alumina sheath 300 or Isotech offer the 670 family as SPRTs recommended for POD mene GINCPGOENDSHISOCHOITOU E Primary Applications and the 909 Family for Secondary Platinum Gold Thermocouple Laboratories This model offers smaller uncertainties than Type R or S These families span from 200 C to 670 C for higher using only pure metals in the construction An economical temperatures up to 961 78 C the freezing point of Silver alternative to HTSPHRIS Isotech offer the 96178 HTSPHT Standard Thermocouples Whilst no longer a part of the temperature scale thermocouples are widely used in calibration laboratories Isotech can supply Standard Thermocouples to 1600 C either in platinum platinum rhodium or platinum gold mat
135. sign B Zero Channel to Channel Variation Even with a microsKanner as the channel expander duplicates the front end of the microK for each input rather than just being a switch box B Zero Temperature Coefficient Temperature Coefficient is Oppm C another benefit of the substitution technique No need for warm up or stabilisation periods B Complete Line Frequency Rejection Total rejection of 50 and 60Hz line frequency Thermocouple Measurements When used with an external 0 C cold junction reference unit or by measuring the junction temperature with a PRT on another channel the microK can be used for low uncertainty precision thermocouple measurements The microK is designed for ALL the thermometer types used in a laboratory including Standard Thermocouples The voltage uncertainty is 0 25uV equivalent to 0 01 C for a Platinum Gold thermocouple at 1000 C ADC The microK realises its superior linearity and low noise through a number of novel approaches including a new noise reduction technique new solid state switching new guarding arrangements and a sophisticated substitution topology to achieve zero drift NPL National Physical Laboratory Technology Applied Keep Warm Currents The microK includes keep warm current sources to maintain the power in a PRT when it is not being measured eliminating uncertainty resulting from power coefficients Each channel whether on the microK or a microsKanner can
136. stors As a result of many years development Isothermal are now able to offer a temperature controlled Standard Resistor Maintenance Bath Using Peltier heating cooling modules temperatures 20 C either side of ambient temperature may be set to a resolution 0 01 C otability and temperature differences total less than 0 015K when measured directly in the oil of the bath and 0 003K when measured inside a Fixed Standard Hesistor The bath will house several Resistors depending on their size and is ideal for measuring the temperature coefficients of Fixed Resistors as well as maintaining them at a selected temperature The oil used in the bath is very special it has to be very high resistance and very low viscosity Wrong choice of oil will cause larger temperature gradients and may cause the motor to burn out Model 455 Temperature Dew point to 40 C Range Accuracy 0 005 C stability and gradients Control 0 01 C Resolution Power 15w typical 100 130 or 208 240VAC 50 60Hz field changeable Dimensions Height 910mm Width 635mm Depth 710mm Weight 66kgs Accessories 932 19 72 35 litres of special oil How to order 455 Standard Resistor Maintenance Bath Please specify voltage required Please specify number and type of Resistors Resistor Maintenance Bath Model 455 Internal Assembly 1 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 53 Temperature Controlled AC DC Resistors Model
137. t with Primary Standard Cells training courses Isothermal Towers remove the mystery from fixed point calibration You can purchase three Isothermal Towers Tin Zinc and Aluminium for a similar price as one conventional cell Easily set to provide a melt or freeze of 24 hours or and heat pipe apparatus more lending themselves for automatic calibration and providing your lab with an all day long plateau 82 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES Perfect Audit Item As an audit item an accreditation authority can send the device to laboratories for intercomparison Because the cell apparatus and immersion compensator are a single entity the performance is Unambiguous unlike existing systems where cell and apparatus are often separated during intercomparison Accreditation authorities love them 23 Hour Melt 80 1mK 2 Hours n qd dz ilk Ji mk e vn _ 30 Hour Freeze 50 0 3mK 7 3 Hours gt B Isothermal Towers include a traceable calibration certificate This includes a graph of one freeze one melt plateau and a certificate of purity for the metal inside the siphonic cell As an option UKAS calibration is available to one of two services see table over for the uncertainties Full data available a
138. t www isotech co uk isotower ISUT CH Available to Hire Additionally Isothermal Towers are available to hire from Isotech and a growing number of Isotech Distributors to allow laboratories to audit themselves by intercomparing their cells and standard thermometers to a UKAS calibrated Isothermal Tower Transportable ITS 90 Isothermal Towers are transportable by carrier there are no fragile glass parts New Integrated Device Isothermal Zone T QFP Immersion Compensator Conventional Em N m ON Ceramic Insulators bisce E M m m m N Cell T Heat Siphon Q QS A fixed point cell is not long enough to eliminate heat conductance along the thermometer calibrated in it Currently using long furnaces heat shunts and reflective baffles an attempt is made to reduce these losses The ISOTower uses a combined metal clad fixed point cell and heat siphon which when heated provides an isothermal environment for the metal within to change state The outer wall of the cell becomes the inner wall of the heat siphon with cost as well as performance benefits Additionally an Immersion Compensator is used to compensate for the stem conduction problems caused when a thermometer under test is not sufficiently immersed into a fixed point cell Benefits of the ISOTower over a conventional Quartz Cell and Apparatus ISOTower B Robust no glass parts B Easily Transported B inte
139. tainties from 0 5mk to 2mK over the range 38 C to 660 C Users in industrial and secondary laboratories benefit from using Slim Cells to calibrate to smaller uncertainties than is possible with dry blocks or liquid baths The Isotech olim Water Triple Point Cell is comparable in cost to a specially drilled metal insert putting it in the reach of all calibration engineers Using a Water Triple Point Cell allows cost effective checking of standards Fixed Point Argon Mercury Water Gallium Indium Tin Zinc Aluminium Silver State Triple Point Triple Point Triple Point Melt Point Freeze Point Freeze Point Freeze Point Freeze Point Freeze Point between calibrations and to help determine when a thermometer needs recalibration Water triple point cells have uncertainties less than 0 001 C at a very modest cost In order to use an ITS 90 Fixed Point Cell apparatus is needed it must create a zone of constant temperature around the cell so that the cell can melt of freeze uniformly Isotech equipment uses multi zone heating or for optimal performance a heat pipe or heat siphon Io calibrate a thermometer it must be sufficiently immersed that further immersion would make no temperature change to the thermometer A new innovation from Isotech is the Isothermal Tower which combines apparatus a heat siphon fixed point cell and an immersion compensation device The Isothermal Towers are simple to use
140. takes 15 working days Cell Containment B Resealable cells Traditionally our optimal cells have been assembled into resealable quartz tubes or crucibles whereby the cell can be vacuumed and refilled with pure argon to 1 atmosphere More recently Isotech have pioneered metal clad cells replacing the more fragile quartz with a pre aged metallic alternative These cells have a small metal tube which can be used for vacuuming and refilling the cell and because of less conduction from the cell the cell is closer thermally to its ITS 90 value B Sealed Cells It maybe more convenient to have sealed cells cells with a cladding whose internal pressure is preset to 1 atmosphere at the freeze temperature and then sealed Isotech offers both quartz and metal clad sealed cells ISUT CH UKAS Calibration Service for SPRTS SPRT Calibration with ITS 90 Fixed Points Premium Service ISOTECH UKAS Calibration Uncertainties k 2 Suitable only for Isotech 670SQ Models or other Primary Standard SPRTS of similar stability Fixed Point C Range Range Range Range 1 2 3 4 Typical Uncertainties TP Argon 2 189 3442 1mK 2mK TP Mercury 38 8344 1mK 1mK TP Water 0 01 1mK 1mK MP Gallium 29 7646 FP Indium 156 5985 FP Tin 231 928 FP Zinc 419 527 FP Aluminium 660 323 FP Silver 961 78 SPRT Calibration with ITS 90 Fixed Points Standard Service ISOTECH UKAS Calibration Uncertainties k 2 Suitable for Primary and Working SPRTS Is
141. temperature Now it is possible to calibrate temperature sensors such as PHTs Thermocouples and Thermistors at ultra low temperatures without the need for a liquid bath Portability and Safety Unlike a liquid bath the Isis requires no costly or hazardous fluids and offers greater portability This will be of particular value to calibration engineers working on site with low temperature freezers as encountered in pharmaceutical aeronautical and food environments The minimum operating temperature is less than stirred liquid laboratory calibration baths and users in laboratories will also benefit by avoiding the ongoing need for expensive fluids The maximum operating temperature is 40 C a little higher than the minimum operating temperature of Isotech Hot Blocks This permits covering the range from 100 C to 650 C or higher with just two Isotech blocks By limiting the maximum temperature the reliability and operating life of the cooling engine is maximised and has been agreed in consultation with the licensee of the cooling technology see below Cooling Technology The Isis makes use of a Free Piston Stirling Cooler FPSC which provides a massive 80 Watts of cooling power to the calibration block Specialist materials patent applied for are used for the heat transfer from the FPSC to the block Operating Life Reliability is a prime attribute of this revolutionary new product Testing at 20 000 hours nominally equivalent
142. tenance Free Use W Available with programmable controller with communications The Annealing Furnace model 414 is designed to heat anneal and cool SPRIs Standard Platinum Resistance Thermometers prior to calibration The temperature range of the Furnace from ambient to 1000 C enables all types of SPRTs to be annealed One of the duties of a calibration laboratory manager is to ensure that the SPRTs used in the Laboratory are fully annealed and still within specification Just using the thermometers within the laboratory will cause work hardening to take place within the platinum coil of the SPHT Therefore regular annealing is required to ensure the SPRIs are in an ideal condition In 1990 the then new temperature scale ITS 90 specified the use of SPHTs up to the Silver point 961 78 C At these temperatures quartz is very porous and in reducing atmospheres the SPHIs can quickly become contaminated The Isotech Annealing Furnace offers a safe solution for those who wish to anneal SPRTs up to 1000 C To prevent contamination at high temperatures a constant flux of pre heated air passes the SPRTs being annealed A comprehensive handbook accompanies the Furnace This Furnace is installed simply and requires no maintenance Model 414 Dimensions Height 800mm Width 400mm Depth 620mm Control 0 1 C Resolution Weight 40kg Temperature Range Ambient to 1000 C Furnace Depth 450mm d p How to order Diameter 50mm 41
143. test With the click of a button data is logged with time information it is also possible to log continually The calibration bath temperature can be changed from the PC or from the calibration baths controller Cal NotePad will display the temperature changes as they occur on the re scalable chart display For traceable calibration the unit under test should be compared to a calibrated standard thermometer Cal NotePad can record the actual temperature of the bath from either the in built indicator of an Isotech SITE model or from a variety of external instruments see list If the external instrument has two channels e g Isotech TTI then the unit under test may be connected to channel B for logging with CNP Alternatively the value can be typed in from the keyboard Similarly the calibration bath controller value actual temperature SITE indicator value or unit under test value may also be entered manually Then the manually entered data is combined with that gathered automatically and the resultant file can be opened in an external application such as Excel for the preparation of reports certificates etc Cal NotePad is designed for ease of use it will give a chart of the system When the operator determines the system is stable easily seen from the chart then clicking a button will record time operator serial numbers of unit under test along with controller and indicator values Cal NotePad can be used for semi automatic cali
144. that will last for between 12 and 24 hours With the Dual Furnace the thermometers are removed from their storage rack and placed in the pre conditioning furnace The furnace is slowly heated to the Cell temperature The thermometers are protected from contamination by a Slow air flux around them One by one the thermometers are transferred into the cell for 20 to 30 minutes for calibration and thence back to the conditioning furnace When all the thermometers have been calibrated the conditioning furnace is slowly cooled back to 400 C whence the thermometers can safely be removed into room temperature Accessories Accessories include equalizing blocks a fan assembly to keep thermometer handles cool a thermometer holder and internal and external isolating transformers Cooling Coil The Potassium and Sodium models have a cooling coil in the lid with connections to circulate tap water to keep the furnace lid cool protecting the SPRT and reducing heat load into the lab The Isotech Medium Temperature Furnace is designed specifically to realize and maintain the freeze plateaux of Isotech Indium Tin Zinc and Aluminium Cells for the calibration of thermometers on ITS 90 It can also be used with an insert as an annealing facility of the highest order for SPRTs or as a comparison calibration facility Model Temperature Range Heatpipe Cells Conditioning Furnace Equalizing Block 17707 125 C 250 C Water In and Sn Included
145. the cell s melt and wait Once the cell starts to melt you can use it all day to calibrate As you go home lower the Medusa temperature by 5 C and the cell will refreeze overnight ready for use again the next day Or like us automate the process using a wall timer to have cells melting all day every day With cells apparatus and SPRT s you still need fixed resistors and an instrument If you chose the standard recommended UKAS uncertainties you need a microK 250 two Standard Resistors with UKAS certificates and a temperature controlled environment to put them in If you chose the premier UKAS route then you need a microK 70 bridge as well as the resistors and temperature controlled environment SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 95 Introduction to lemperature Calibration Software 96 Software Isothermal Technology s range of calibration software saves you time and lowers calibration costs Isotech have a tested solution to calculate coefficients for Industrial Probes for SPHTS fit thermocouple error curves and fully automate the calibration of sensors ITS 90 Software Icarus is software for the ITS 90 Laboratory to calculate between resistance and temperature for SPRIs It allows for the calculation of coefficients and the printing of charts and certificates SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES Cal NotePad Isotech calibration equipment is supplied with Cal NotePad This so
146. themselves as the instrument of choice for National Metrology Institutes and Primary Laboratories with innovative features accuracy and versatility In response to industry demands for greater accuracy the milliK now brings the same design philosophy of the microK to those outside the Primary Laboratory Users calibrating industrial sensors in the laboratory pharmaceutical plants food and beverage plants aerospace power industries and service companies will welcome the milliK as a solution to increase measurement confidence ensure high accuracy traceable calibration improve quality as well as ensure safety and lower energy consumption bee Precision Thermometer milliK The Isotech milliK High Accuracy Measurement Controls Calibration Baths Logs Data No Compromise Design The design team have considered industrial users and applications in order to avoid measurement errors and problems encountered in some instruments from other manufacturers B Eliminates Thermal EMF Errors in PRTS Fast current reversal technology and solid state switching eliminate thermal EMF effects avoiding the errors that occur with fixed DC instruments B Lead Wire Correction PRT lead wire errors are eliminated for up to 30m of four core screened cable B Galvanic Isolation Not only are the two sensor channels galvanically isolated the 4 20mA input is also separately isolated The benefits of the advance design are no ground loops imp
147. ths CCT 2000 13 says that a plateau length of 10 or more hours is suitable for optimal realizations NIST in the US like to work with long plateaus whereas according to our UKAS procedure we should calibrate an SPRT 2 or 3 times using a new plateau each time Our apparatus has sufficient performance that the length of the plateau is dictated mainly by how close the set point of the apparatus is to the fixed point being realized Plateau lengths at the silver point of over 70 hours 3 days have been achieved using our furnaces From a practical point we normally work with one working day long plateaus remelting the cell overnight ready for a new freeze the next day El High Temperature Furnaces To eliminate problems with noise and electrical safety from high earth leakage currents our high temperature furnaces operate from 110VAC For operation from 230VAC the furnace can be provided with an internally mounted isolating transformer SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 21 ISUT CH Furnaces al Dual and Heat Pipe ll Essentially Gradient Free lil Simple to use B Long Plateau Length The Furnace Core A heatpipe provides the ideal conditions for the creation and maintenance of freeze points from ITS 90 The core is essentially free from gradients meeting the recommendations of CCT 2000 13 Optimal Realization of the Defining Points of the ITS 90 The heat pipe is desig
148. tion requirements of all labs from most demanding of National Metrology Institutes through to the needs of those calibrating industrial sensors Precision Thermometry Bridges The microK instruments and the matching microK channel expander can be used with the best of Standard Platinum Resistance Thermometers Thermistors and Thermocouples with uncertainties of better than 0 0001 C The microK family has unrivalled convenience and flexibility with performance that was previously only attainable with the best of the AC Resistance Bridges Precision Thermometers This range includes two high accuracy bench top thermometers The TTI 22 offer performance to 1mK at a ground breaking new price The millik can be used with SPRTs PRTs Thermistors Thermocouples and Current Transmitters Selection Guide Model SPRTs PRTs Thermistors Thermocouples Accuracy Application Features at 0 C Precision Thermometry Bridges microK 70 E E 0 017ppm Primary Three Input Channels Touch Screen microK Adjustable Current 125 N N 0 03ppm Primary Source Keep Warm Currents microK Touch Screen 250 B B 0 06ppm Secondary microK 500 E B 0 125ppm Secondary Precision Thermometers millilK E 0 003 C Secondary Current Input TTI 22 E B 0 001 C Secondary Sets new Standard for Price to Performance Scanners microsKanner Add up to 90 Channels to microK family Plug and Play Operation Mod
149. tly traceable to NIST s realization This process takes 15 working days IT 5 90 specifies that the melting or freezing should take place at 101 325 Pa An Isotech sealed cell is filled with 6N pure argon to 101 325 Pa 0 04 as certified by a UKAS certificate of the vacuum gauge Nothing is left to chance with an Isotech Primary Standard Because we supply most of the worlds primary laboratories we need to be able to certify what we have made Working with UKAS and NIST we have reduced our uncertainties of measurement to the smallest outside NIST They are tabulated below for your information UKAS k 2 Isotech mK Quartz amp Metal Clad Hg 0 22 Pe 0 07 Ga 0 07 In 0 65 Sn 0 60 Zn 0 90 Al 1 10 Ag 2 00 As November 2008 The latest UKAS Schedule can be found from our website or at www ukas org SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES The above contains no fancy claims or unsubstantiated numbers only independently verifiable facts some 500 metrologists visit Isotech each year for discussions and training you will be welcome The immersion of the cells from metal surface to the bottom of the re entrant tube is 200mm 5mm Each primary cell is accompanied by a conformity certificate which includes a copy of the impurities analysis a copy of the metal of the cell evaluation freeze and melt curves At an extra cost we can issue a UKAS certificate to the uncertainty above This
150. to 10 years at 40 hours use each week shows that 100 C is still possible with an increase in cooling time 1096 100 C Dry Block Isis Benefits Isotech can offer full support with options for UKAS ILAC calibration tutorial on getting the best calibration uncertainties and a full range of supporting reference thermometers indicators and software The Isis has a large insert 35mm diameter by 160mm deep This allows for calibration of multiple sensors For thermal validation applications there is an insert with pockets for a reference probe 6 5mm and 20 x 3 5mm pockets for thermocouples This allows a single calibration cycle to validate up to 20 probes at a time nttp www isotech co UkK SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 3 Model Temperature Range Approximate time to Temperature from Ambient Absolute Stability Radial Homogeneity similar pockets Vertical gradients over bottom 40mm Calibration Volume Standard Insert Power Voltage Dimensions Weight The only Dry Block working to 100 C METAL BLOCK INSERTS Standard Insert A 9 5mm 8 0mm 6 4mm 6 4mm 4 5mm 4 5mm All 157 deep ALTERNATIVE INSERTS Standard Insert B 13mm 10mm 8mm 5mm and 3 5mm All 157 deep Standard Insert C 8mm and 6 x 6 5mm All 157 deep The Isis Dry Block Model 525 Validation Insert 6 5mm and 20 x 3 5mm All 157 deep 525 Isis 100 C to 40 C 20 C 20
151. ts apparatus giving a guaranteed performance from the cell Patent applied for aaa For more information about ISO lowers or any other services or products in the Isotech range please refer to our website www isotech co uk ee http www isotech co uk isotower_certificate html SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 85 86 Slim Fixed Point Cells Sealed 156 to 1084 C d WE Ultra Pure gt 99 9999 6N ll 35 Year Plus History ll For Optimal Realisations Water The Isotech B8 30 130 Cell is small enough to fit into portable Dry Blocks such as the Venus and Europa models For the larger blocks like the Oceanus Isotech recommend the B 12 46 210 with its increased immersion depth Gallium and Mercury Cells Like the B8 Cell the Slim Gallium Cell can be used in portable blocks like the Venus and Europa or in stirred liquid baths The Hydra and Orion have accessories available to support the cells Indium to Copper Isotech s Slim Cells have been in constant use since their introduction in 1990 The cells have always been made from the highest quality graphite and 6N 99 999996 pure metals After further investment in the lab and gaining smaller uncertainties from UKAS we reviewed and further refined our range of metal clad cells to give better accuracy and performance The new professional ranges of cells have more metal inside providing an active immersion depth in the metal o
152. ves Other systems have limited the user with a built in template and the need to pay extra for any changes with I Cal Easy just build in your own certificate in minutes http www isotech co uk icaleasy anm ote 52 kimim goes em mom em m Finem Trl y a LE LI Ell Fx E T TE ku Aa man ma a pam E mH rr i um ej hab be m eE EN Twp ra Ane Ti im EE TRUL d n awe mri 7A et i mi CHE Tur I 7 TEM Ej Fu a mem ET T u d mes TR LS nu Bm a Tua rm i om ai Ld mu Sul ub dus SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 99 ISUT CH I Cal Easy supports the TTI 7 and Isotech Dry Blocks Liquid Baths and Calibration Furnaces Additional support for other and third party instruments is available contact Isotech for details I Cal Easy provides a powerful but easy to use automatic calibration system A graphical setup lets you drag and drop instruments and equipment onto the appropriate PC port no need to create config files In addition to the comprehensive manual balloon tips guide you as to the operation of each control Once familiar with the system this balloon help feature can be turned off Build an automatic calibration system with I Cal Easy SYSTEM CONNECTIONS The criteria for stability can be set to suit all types of equipment Dry Blocks Liquid Baths and High Temperature Furnaces Once the system is stable choose how many measurements to take at each cali
153. water Capacity 8 litres approx Depth of immersion 350 mm Accuracy using 0 001 C comparison techniques Power 50W 108 130 or 208 240VAC 50 60Hz Dimensions Height 580 mm Width 420 mm including handle Depth 250 mm Weight 15 kgs Options 814 01b Copper Equalising Block 814 02 Mercury Thermometer Support Kit 814 06 02 Small Water Triple Point Cell Kit 814 06 04 Large Water Triple Point Cell Kit How to Order 813 Stirred Ice Bath Please specify voltage required SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES 73 rs _ Large Volume Calibration Bath d Model 820 E Large volume for calibration of a number of sensors E Wide temperature range 30 C to 200 C E Good comparison accuracy 0 01 C If you have a large number of sensors to calibrate then this economically priced stirred liquid bath is the solution The 820 bath has been introduced to provide a liquid calibration bath with a large volume This is to allow the bath to be used with many temperature probes simultaneously immersed in the bath or with accessories It may also be used to maintain standard resistors at a constant temperature The liquid in the bath is heated to the set temperature and circulated by a propeller system The Aquarium is of robust construction and the liquid is contained in a stainless steel insulated enclosure which has a calibration volume 185mm long x 140mm wide x 300mm deep Refer to Liquid Select
154. ways invested heavily In and attached great importance to its calibration laboratory which w first accredited in 1985 i loday the laboratory known as NTPL is formally accredited by UKAS to ISO IEC 17025 2005 Since 2008 NTPL UKAS Certificates have been licensed to bear the ILAC MRA mark ILAC International Laboratory Accreditation Cooperation CERTIFICATE ISSUED BY ISOTHERMAL TECHNOLOGY DATE OF ISSUE 2 February 2009 CERTIFICATE NO 09 ILAC was formed to harmonize technical issues between accreditation bodies worldwide with the goal of breaking down international barriers resulting in increased global trade This was implemented through a network of Mutual Recognition Arrangements MRA amongst accreditation bodies throughout the world 01 123 OF CALIBRATION LIMITED T P CUSTOMER C Columbus Calibration TOMER ORDER 1492 CUS Under these MRA s UKAS calibration certificates are recognised and accepted in over 70 countries For more information on ILAC visit www ilac org Approved S Name Signature ITL REFERENCE 2810034 ignatory ME LLL EE 7 7 7 DESCRIPTION Isotech Model IDENTIFICATION Ga 454 E OF CALIBRATION From 21 DATE OF CALIBRATION ASIS OF CALIBRATION The cell has been inter BASIS OF CALDAS cells The temperature scale in use in this Lab ITS 90 This laboratory 1s accredited in accordance W
155. web site www isotech co uk 68 SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES ISUT CH Accesories Refer to Liquid Selection Guide on page 73 for information on liquids and important Health and Safety Information Sensor Holder 798 05 04 Thermometer Lid 798 05 01 Liquid Volume Lid Equalizing Block EPTUM LC Oo 9w e d 798 05 02A 798 05 02B 798 05 02C 798 05 02D Included Aluminium Equalizing Overflow Adapter Block 4 pockets 8mm diameter 160mm deep E B Copper Equalizing Block 4 pockets 8mm diameter 160mm deep Special Aluminium Equalizing Block To suit customer Special Copper requirements Equalizing Block To suit customer requirements Support Kit Holds up to 12 sensors between 3mm diameter and 8mm diameter The Orion liquid level is within 10mm of the top lid allowing most liquid in glass thermometers to be calibrated For applications where the liquid level needs to be higher than the lid the Overflow Adapter can be be fitted to the Orion L and M This assembly includes a motor to pump the liquid and raises the liquid level 20mm above the top lid 796 05 01 Standard Dual Cell Holder Includes interchangeable ez Ez To To 6 6s Dual Cell Holder Includes Power Supply Monocular and Support 796 03 Monocular with x8 magnification to ease reading liquid in glass thermometers Fixed Point Cells Mie issues Mercury Triple Point Cell 38 8
156. y from 5 C to 90 C then water may be used with is ideal in many ways low cost safe and readily available For many labs though there will be a requirement to calibrate over much wider ranges For low temperature calibration alcohol or a mixture of alcohol and water can be used Methanol is commonly chosen as it is easily obtained and relatively low cost Methanol is both toxic and flammable and must be used with care Isotech Oils for Hydra Orion and 915 915 07 915 08 915 09 936 06 07 580 06 09 ll Provision for adequate fume extraction needs to be made when using any open liquid bath The requirement will vary depending on the liquid used and the temperature range Medium Silicon Oil High Silicon Oil Very High Silicon Oil C10 Silicon Oil C20 Silicon Oil There are non toxic alternatives to Methanol including Florinert from 3M and Halocarbon 0 8 from Halocarbon The disadvantage is that these fluids are expensive compared to Methanol see www 3m com and www halocarbon com for further information For high temperature calibration the choice is usually that of a silicone oil Silicone oils can be used at low temperatures too but icing can be a problem particularly if a bath is used for long periods at low temperatures Minimum Temperature 40 C 150 C 40 C 35 C 20 C The practise at Isotech is to use one bath with a low temperature liquid and a second with oil for higher tem
157. y sterilization temperature SOLUTIONS FOR PRIMARY amp SECONDARY LABORATORIES E Commercial Grade Chillers The chillers are one third horse power commercial grade units not cheaper domestic grade as used by some manufacturers ll Calibration Depth Double the depth of some baths The Hydra Range has up to 300mm depth of immersion Circular Design The circular design eliminates cold corners found in tank shaped calibration baths Model Temp Range Volume Absolute Stability Vertical Uniformity Heating time Cooling time Communications Dimensions Weight Safety Power How to Order Refer to Evaluation Report for Full Details ISUT CH A Over gt d el Due Calibration ontroller H Volume Temperature Controller z f T Overflow Power e Set Reset Drain QQ QOQI e g E ES E E NE E E TILLIIIID Cooling Tri 798H and H HFH HHE 798EHT only LLLLLLLE 798L 798M 798H 798EHT 80 C 125 C 40 C 125 C 30 C 200 C 30 C 300 C 150mm Diameter 300mm Deep 5 litres 0 030 C 0 017 C 0 015 C 0 015 C Methanol 80 C Methanol 40 C Oil 125 C 071 N00 0 002 C 0 002 C 0 002 C 0 005 C Oil 50 C Oil 50 C Oil 125 C Oil 200 C 25 C to 200 C lt 60 minutes C10 Oil Ambient to 80 C 130minutes Methanol Includes Serial Interface PC Cable and Software 405mm Wide 610mm Deep 940mm High

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