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USB TC-08 User`s Guide

1. sensitivity 10 uV C and high cost make them unsuitable for general purpose use Copyright O 2005 2012 Pico Technology Limited All rights reserved usbtc08 en 10 Glossary Type S thermocouple Type S thermocouples are made from platinum and rhodium and are suitable for high temperature measurements of up to 1760 C Low sensitivity 10 uV vC and high cost make these thermocouples unsuitable for general purpose use Due to their high stability type S thermocouples are used as the standard of calibration for the melting point of gold Type T thermocouple Type T thermocouples are made from copper and constantan are highly accurate and operate in the 270 C to 400 C temperature range USB Universal Serial Bus This is a standard port that enables you to connect external devices to PCs A typical USB 1 1 port supports a data transfer rate of 12 Mbps 12 megabits per second and is much faster than a COM port usbtc08 en Copyright O 2005 2012 Pico Technology Limited All rights reserved USB TC 08 User s Guide 11 Index C Cold junction 8 Connection 4 Contact details 3 H Hot junction 8 Impedance 7 Installation 4 R Repairs 2 Resolution 7 S Safety 2 Specification 7 T Thermocouple 8 Copyright O 2005 2012 Pico Technology Limited All rights reserved usbtc08 en pico j Technology USB TC 08 User s Guide 13 Copyright 2005 2012 Pico Technology Limited All
2. software is suitable for a given application It is your responsibility therefore to ensure that the product is suitable for your application Mission critical applications This software is intended for use on a computer that may be running other software products For this reason one of the conditions of the licence is that it excludes usage in mission critical applications for example life support systems Viruses This software was continuously monitored for viruses during production however you are responsible for virus checking the software once it is installed Copyright 2005 2012 Pico Technology Limited All rights reserved usbtc08 en Introduction 1 3 Support If you are unsatisfied with the performance of this software please contact our technical support staff who will try to fix the problem within a reasonable time scale If you are still unsatisfied please return the product and software to your supplier within 28 days of purchase for a full refund Upgrades We provide upgrades free of charge from our web site at www picotech com We reserve the right to charge for updates or replacements sent out on physical media Trademarks Windows is a registered trademark of Microsoft Corporation in the USA and other countries Pico Technology Limited and PicoLog are internationally registered trademarks Safety warning We strongly recommend that you read the general safety information below before us
3. couple type and the temperature range Below is a list of the thermocouples and temperature ranges supported by the USB TC 08 Actuel measurable range Theoretical ranges CJC 5 Cto70 c Type B 20 C to 1820 C CJC must be 0 C to 1820 C gt 20 C Type E 270 C to 910 C 270 C to 1000 C Type 210 C to 1200 C 210 C to 1200 C Copyright O 2005 2012 Pico Technology Limited All rights reserved usbtc08 en Product information 3 2 How a thermocouple works In a closed circuit of two dissimilar metals a thermocouple an electric current flows when one of the two junctions is heated with respect to the other The current continues to flow as long as the two junctions are at different temperatures The magnitude and direction of the current is a function of the temperature difference between the junctions and of the thermal properties of the metals used in the circuit This phenomenon is known as the Seebeck Effect The conductors can be made of any two dissimilar metals and when the hot junction is heated the current flow can be observed If the positions of the hot and cold junctions are reversed current flows in the opposite direction A thermocouple circuit actually generates a measurable low voltage output that is almost directly proportional to the temperature difference between the hot junction and the cold junction A change in this temperature difference produces some net change in the voltage Note Mor
4. ct New Settings from the File menu The Recording dialog box appears Recording X Recording method Real time continuous DI Action at end of run Stop Restart delay H Minutes I Use multiple converters Cancel Help 3 Click the OK button The Sampling Rate dialog box appears Sampling Rate X Sampling interval 1 Seconds Y Maximum number of samples 500 Cancel Readi Pe As many as possible y Help 4 Click the OK button The Converter details dialog box appears usbtc08 en Copyright O 2005 2012 Pico Technology Limited All rights reserved USB TC 08 User s Guide 5 Converter details x Converter type ERAAN Port Cancel USB Devices Hel p Device Serial Status Refresh USB enumeration progress 5 Select USB TC 08 from the drop down list of converters The device name and serial number should appear in the USB Devices pane and the USB enumeration progress bar gradually expand to 100 Ifthe progress bar does not start moving disconnect and reconnect the USB TC 08 then click Refresh 6 In the USB Devices pane select the USB TC 08 If you are using more than one USB TC 08 check the serial number on the bottom of the device so that you know which one to select from the list 7 Click the OK button The following dialog box appears TCO8 Channels x Serial Cold junction unused Edit Channel 1 unused Channel 2 unused Channel 3 u
5. e information on choosing and using thermocouples can be found at this page on our website usbtc08 en Copyright O 2005 2012 Pico Technology Limited All rights reserved USB TC 08 User s Guide 4 Glossary Cold junction compensation CJC A method of compensating for ambient temperature variations in thermocouple circuits Common mode range The voltage range relative to the ground of the data logger within which both inputs of a differential measurement must lie in order to achieve an accurate measurement DLL Dynamic Link Library Files with this file extension contain a collection of Windows functions designed to perform a specific class of operations Input impedance The resistance measured between the input terminals of a circuit NFR Noise Free Resolution The effective number of bits of resolution that can be considered noise free Overvoltage protection The maximum input voltage that can be applied without damaging the unit Resolution A value in bits related to the number of increments of an analog input signal that can be detected by a digital measurement system A high resolution measurement system detects smaller signal increments than a low resolution measurement system Thermocouple A device consisting of two dissimilar metals joined together The thermoelectric voltage developed between the two junctions is proportional to the temperature difference between the junctions Type B thermocoup
6. ing your product for the first time If the equipment is not used in the manner specified then the protection provided may be impaired This could result in damage to your computer and or injury to yourself or others Maximum input range The USB TC 08 is designed to measure voltages in the range of 70 mV Any voltages in excess of 30 V may cause permanent damage to the unit Mains voltages Pico products are not designed for use with mains voltages Safety grounding The ground of every product is connected directly to the ground of your computer through the interconnecting cable provided This is done in order to minimise interference Ifthe PC especially laptop is not grounded reading stability cannot be guaranteed and it may be necessary to manually ground the equipment Take care to avoid connecting the inputs of the product to anything which may be at a hazardous voltage If in doubt use a meter to check that there is no hazardous AC or DC voltage Failure to check may cause damage to the product and or computer and could cause injury to yourself or others Take great care when measuring temperatures near mains equipment If a sensor is accidentally connected to mains voltages you risk damage to the converter or your computer and your computer chassis may become live You should assume that the product does not have a protective safety earth Incorrect configuration or use of the device to measure voltages outside the maximum in
7. le Type B thermocouples are made from platinum and rhodium and are suitable for high temperature measurements of up to 1820 C Unusually due to the shape of their temperature voltage curve type B thermocouples give the same output at 0 C as at 42 C Type E thermocouple Type E thermocouples are made from chromel and constantan They have a high output 68 uV C making them well suited to low temperature cryogenic use They are non magnetic Type J thermocouple Type J thermocouples are made from iron and constantan They measure temperatures in the range 210 to 1200 C The main application is with old equipment that can not accept the more modern thermocouple J types should not be used above 760 C as an abrupt magnetic transformation will cause permanent decalibration Type K thermocouple Type K thermocouples are low cost general purpose thermocouples made from chromel and alumel operating in the 270 C to 1370 C temperature range Sensitivity is approx 41 uV C Type N thermocouple Type N thermocouples are made from nicrosil and nisil The high stability and resistance to high temperature oxidation of these thermocouples make them suitable for measuring high temperatures They are less expensive than platinum types B R and S and were designed to be an improved type K Type R thermocouple Type R thermocouples are made from platinum and rhodium and are suitable for high temperature measurements of up to 1760 C Low
8. nsation for thermocouples PicoLog supports up to 20 USB TC 08 devices and the driver can support more as many as 64 if you have a high specification PC This manual describes the physical and electrical properties of the USB TC 08 For an explanation of how to use the software drivers please refer to the USB TC 08 Programmer s Guide and PicoLog User s Guide Legal information The material contained in this release is licensed not sold Pico Technology Limited grants a licence to the person who installs this software subject to the conditions listed below Access The licensee agrees to allow access to this software only to persons who have been informed of these conditions and agree to abide by them Usage The software in this release is for use only with Pico products or with data collected using Pico products Copyright Pico Technology Limited claims the copyright of and retains the rights to all material software documents etc contained in this release You may copy and distribute the entire release in its original state but must not copy individual items within the release other than for backup purposes Liability Pico Technology and its agents shall not be liable for any loss damage or injury howsoever caused related to the use of Pico Technology equipment or software unless excluded by statute Fitness for purpose No two applications are the same Pico Technology cannot guarantee that its equipment or
9. nused Channel 4 unused Channel 5 unused Help Channel 6 unused Channel 7 unused Channel 8 unused Disable LEE Mains Frequency 5042 D 8 In the TC 08 Channels window double click on Channel 1 unused The Edit TC 08 Channel dialog box appears Copyright 2005 2012 Pico Technology Limited All rights reserved usbtc08 en Getting Started Edit TC08 Channel X eO Thermocouple Type K v BER T Filter Enable Filter Factor E Cancel Help Options 9 From the Thermocouple drop down list select the type of thermocouple you are using and click OK The TC 08 Channels dialog box reappears 10 Click OK Channel 1 should now appear in the monitor window with the current temperature reading PLW Recorder Of x File Settings View Help BEHmER E Awaiting data filename Use File New data Channel 1 21 10 C usbtc08 en Copyright O 2005 2012 Pico Technology Limited All rights reserved USB TC 08 User s Guide 7 3 3 1 Product information Note Do not expose the USB TC 08 to a direct heat source e g sunlight as heating cooling of the device may cause inaccurate readings Specifications Number of input channels 8 Environmental conditions Operating temperature O to 50 C for stated accuracy 20 to 30 C Humidity operating 5 to 80 RH non condensing Humidity storage 5 to 95 NOT water resistant Note The resolution and accuracy depend upon the thermo
10. pico Technology USB TC 08 Temperature Logger User s Guide usbtc08 en 6 Copyright 2005 2012 Pico Technology Limited All rights reserved pico j Technology USB TC 08 User s Guide Contents lee o ECO EEE PRA PN iaa 1 be TEE 1 2 Legal information _ 20ssnrsensensorsonsonsnnsnnsnnnsnnnonsonnonsnsnsnnssnnsonsnnnonsnssnsnnssnsnensossonsnsnsnnssnssensonsonsnsansnnsnnnn 1 3 Safety warning Zeg risege dE ENEE ENEE EN AAA AA ENEE NENNEN ds 2 Elei EKEIE ZE 3 2 Getting Started va ass 4 1 Installing the driver EENEG 4 2 Connecting the USB TC 08 TEE 4 3 Product Information Sesc cceecccs san areas condes nte nes sia Lotado Er e AE AEA RS EEKE EEEE EEEa 7 1 Specifications ___ zsrrserssorsnnrsnnnnnsnonsnonsnorsnnrsnnrsnnsonsnossnessnensontnonsnontnensnersnersnntsnssosssenssensnnsonsnonsnonsnonsnersnensnnn 7 2 How a thermocouple works ooooooooonoonnnoncnononononononnconnconncnn nro oran nano n noo reno nen nene nena ran eran n ron rn rra cnn nn nn cren rna cenar 8 POLOS A A e T Ea e 9 JS 11 Copyright 2005 2012 Pico Technology Limited All rights reserved usbtc08 en pico j Technology USB TC 08 User s Guide 1 1 1 1 2 Introduction Overview The USB TC 08 is a temperature and voltage logger designed to support multiple thermocouples With the accompanying PicoLog software the unit can be used with any laptop or PC running Windows XP SP2 Vista or Windows 7 The driver provides cold junction compe
11. put range can be hazardous Repairs The unit contains no user serviceable parts repair or calibration of the unit requires specialised test equipment and must be performed by Pico Technology Limited or their authorised distributors usbtc08 en Copyright O 2005 2012 Pico Technology Limited All rights reserved USB TC 08 User s Guide 1 4 Company details Address Phone Fax Email Technical Support Sales Web site Pico Technology Limited James House Colmworth Business Park Eaton Socon St Neots Cambridgeshire PE19 8YP United Kingdom 44 0 1480 396395 44 0 1480 396296 support picotech com sales picotech com www picotech com Copyright 2005 2012 Pico Technology Limited All rights reserved usbtc08 en 4 Getting Started 2 Getting Started 2 1 Installing the driver The driver is installed automatically when you install the PicoLog software Alternatively you can download the driver from our website at http www picotech com 2 2 Connecting the USB TC 08 Please note do not connect the USB TC 08 until you have installed the software and restarted your PC To begin using the USB TC 08 connect it to the USB port on your computer using the cable provided Next connect a thermocouple to one of the thermocouple input connectors To complete the installation select the USB TC 08 unit and thermocouple type in PicoLog as follows 1 Start up PicoLog Recorder 2 Sele
12. rights reserved usbtc08 en Pico Technology James House Colmworth Business Park ST NEOTS Cambridgeshire PE19 8YP United Kingdom Tel 44 0 1480 396 395 Fax 44 0 1480 396 296 www picotech com usbtc08 en 6 09 03 12 Copyright O 2005 2012 Pico Technology Limited All rights reserved

USB TC-08 User`s Guide

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