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Using Screw Terminal Accessories

4-1

4

Cabling and Wiring

This section discusses the following to help you correctly wire your
thermocouples and other signal sources to the DAS-TC/B:

●

The screw terminal accessories that are needed to interface your
circuits to the DAS-TC/B inputs

●

The nature of the DAS-TC/B inputs and how this influences wiring

●

The appropriate wiring connections for floating and grounded signals

Using Screw Terminal Accessories

Signal connections to the DAS-TC/B main I/O connector require using
either an STC-TC/B or an STA-TC/B screw terminal accessory. This
section describes the features of these accessories and attachment of these
accessories to the board.

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Содержание DAS-TC

Страница 1: ...uy your excess underutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing R...

Страница 2: ...DAS TC B User s Guide A G R E A T E R M E A S U R E O F C O N F I D E N C E...

Страница 3: ...otherwise in accordance with the instructions therefore Keithley does not warrant that operation of the Keithley Software will be uninterrupted or error free and or that the Keithley Software will be...

Страница 4: ...nt Pieters Leeuw 02 363 00 40 Fax 02 363 00 64 CHINA Yuan Chen Xin Building Room 705 12Yumin Road Dewai Madian Beijing 100029 8610 6202 2886 Fax 8610 6202 2892 FINLAND Tiet j ntie 2 02130 Espoo Phone...

Страница 5: ...DAS TC B User s Guide Revision C June 2002 Part Number 95630...

Страница 6: ...trademarks of their respective companies Information furnished by Keithley Instruments is believed to be accurate and reliable However Keithley Instruments assumes no responsibility for the use of su...

Страница 7: ...nstallation Category I and Installation Category II as described in the International Electrotechnical Commission IEC Standard IEC 60664 Most mea surement control and data I O signals are Installation...

Страница 8: ...ld refer to the operating instructions located in the manual The symbol on an instrument shows that it can source or measure 1000 volts or more including the combined effect of normal and common mode...

Страница 9: ...lling the Software 3 2 Installing Application Software and Drivers 3 2 Installing the TestPoint software and driver 3 2 Installing the LabVIEW Software and Driver 3 3 Installing DriverLINX Software Co...

Страница 10: ...onnecting Other Signal Sources 4 13 Connecting a Floating Signal Source 4 13 Connecting a Grounded Signal Source 4 14 5 The DAS TC B Data Logger Features of the DAS TC B Data Logger 5 1 Starting the D...

Страница 11: ...4 7 Figure 4 6 DAS TC B Inputs 4 8 Figure 4 7 Connecting an Ungrounded Thermocouple 4 11 Figure 4 8 Connecting a Grounded Thermocouple 4 12 Figure 4 9 Connecting a Floating Signal Source Method 1 4 13...

Страница 12: ...le A 3 Temperature Voltage Specifications A 2 Table A 4 Voltage Input Specifications A 2 Table A 5 Thermocouple Input Specifications A 3 Table A 6 Noise Specifications A 3 Table A 7 Maximum Gain Error...

Страница 13: ...d accessories Section 2 describes operating features of a board in more detail This section contains a block diagram and brief descriptions of the features as they relate to your options for setting u...

Страница 14: ...specifications Appendix B contains pin assignments for the main I O connector Appendix C contains CE mark certification The index provides hyperlinks as well as written page numbers to locate various...

Страница 15: ...DAS TC B features are as follows The board fits an accessory slot of a computer All 16 channels are differential inputs Thermocouple inputs can be any mix of up to seven standard types as follows B E...

Страница 16: ...grated packages or writing custom programs is provided in the Keithley Full Line Catalog The DAS TC B has fully functional driver support for use under Windows 95 98 NT Note DriverLINX must be install...

Страница 17: ...y and data buffer management A selection of starting and stopping trigger events including pre triggering mid point triggering and post triggering protocols Extensive error checking Context sensitive...

Страница 18: ...m arithmetic functions to advanced acquisition control and analysis routines Also included are debugging tools help windows execution highlighting single stepping probes and breakpoints to trace and m...

Страница 19: ...he DAS TC B The DAS TC B consists of two sections the isolated input section and the control section The isolated input section handles the measurement functions while the control section handles data...

Страница 20: ...ode and Control Pulse Signal Conditioning 4MHz Clock CPU 16MHz Xtal CPU Control Register Opto Isolator Opto Isolator V F Converter Opto Isolator Opto Isolator Inst Amp Gain Mux Voltage Ref Input Mux I...

Страница 21: ...sses first through a stage of optical isolation and then into a stage of counting where a count of the square waves over a specified period determines a value for the corresponding voltage input The p...

Страница 22: ...fied values Following parameter setup the CPU performs a calibra tion and stores the gain and offset coefficients in board memory Next the board reads and stores the CJC sensor value When the PC initi...

Страница 23: ...ference points along ranges of greatest temperature versus voltage change than along ranges of minimal change Using the same number of points at fixed intervals would lead to error along ranges of gre...

Страница 24: ...lling the board in your computer Checking the installation If you encounter any problems with the board after installation refer to Section 7 for troubleshooting information Note Install the DriverLIN...

Страница 25: ...eader must already be installed on the other system If necessary you can first install Acrobat Reader directly from the CD ROM by double clicking X Acrobat setup exe Installing the Software Installing...

Страница 26: ...INX Software Components and Documentation Installing DriverLINX Software Components and Documentation This section discusses installation of DriverLINX drivers and interfaces and DriverLINX and board...

Страница 27: ...nstall Acrobat This optional component installs the Adobe Acrobat Reader for the DriverLINX electronic documentation LabVIEW Support DriverLINX for the DAS TC B Series includes a copy of DriverLINX fo...

Страница 28: ...NX interfaces before writing the software Install them now by clicking Install Interfaces and following the series of on screen instructions When done the Install These DriverLINX Components screen re...

Страница 29: ...Reader opens and the manual entitled Using DriverLINX with Your Hardware Keithley DAS TC B appears e Print the following section from the Using DriverLINX with Your Hardware Keithley DAS TC B manual C...

Страница 30: ...r after a subsequent reboot If you wish to configure your board sometime later you can start the Plug and Play Wizard manually from a batch file In the Windows Explorer double click X Drvlinx4 Help Kd...

Страница 31: ...ectricity before and during handling may damage semiconductor circuits on the board Handle the board using the mounting bracket Do not touch the circuit traces or connector contacts when handling the...

Страница 32: ...ted and requires no further adjustment prior to installation If at a later time you decide to recalibrate the board refer to Section 6 for instructions Setting the Base Address Note Before setting the...

Страница 33: ...the base address switch continue with the next procedure Installing the Board Installing the Board Caution Inserting or removing a board with the computer on can damage your board or your computer To...

Страница 34: ...nfigured satisfactorily Do the following 1 Click the Windows 95 98 NT Start tab 2 In the Start menu click Programs 3 Find the DriverLINX Test Panels folder you should find the DAS TC B Data Logger ent...

Страница 35: ...ce your circuits to the DAS TC B inputs The nature of the DAS TC B inputs and how this influences wiring The appropriate wiring connections for floating and grounded signals Using Screw Terminal Acces...

Страница 36: ...the DAS TC B Appendix B lists the pin assignments for the DAS TC B main I O connector They both support all sixteen differential channels of the DAS TC B The STC TC B mounts on the main I O connector...

Страница 37: ...a CJC temperature sensor and provide an optional switch selectable open thermocouple detection signal for each channel These provisions are described in the next two subsections O N 1 8 7 6 5 4 3 2 O...

Страница 38: ...rate of 20mV C The CJC sensor requires no calibration The CJC is needed for accurate thermocouple temperature measurements A temperature dependent voltage called the reference junction voltage or col...

Страница 39: ...thermocouple circuit can be serious For example when using a thermocouple for automatic control of an elevated temperature an open circuit in the thermocouple typically causes the measured temperature...

Страница 40: ...signal sources to the analog ground of the DAS TC B input amplifier The B GND terminals lead to the analog ground Refer to Connecting Signals on page 4 7 for more information about the analog ground U...

Страница 41: ...e 4 5 Attaching an STA TC B to a DAS TC B Connecting Signals Warning A short between DAS TC B signal inputs and AC creates a safety hazard To avoid these shorts secure all input connections to prevent...

Страница 42: ...B Inputs The input configuration of the DAS TC B is shown schematically in Figure 4 6 Figure 4 6 DAS TC B Inputs To V F Converter and Isolated Digital Connections High Low Input Amplifier 15V 15V Ana...

Страница 43: ...erminals of the input amplifier reject all but a tiny fraction of the common mode voltage the voltage that they see in common relative to the analog ground B GND The High and Low input terminals respo...

Страница 44: ...th thermocouples and the signal is isolated These resistors are connected between the analog signal ground B GND and each of the sixteen Low inputs See Figure 4 6 However when the signal source is gro...

Страница 45: ...ce to ground in even a highly isolated power supply can be hundreds of picofarads providing a substantial path for high frequency noise Connecting the object being monitored to the analog ground B GND...

Страница 46: ...d of the grounded object Do not connect analog ground B GND to the Low input connection at the board Connecting the analog ground B GND to the Low input at the board or allowing the internal 10k resis...

Страница 47: ...f you are using a 24 AWG Type K Chromel Alumel thermocouple with 10 foot leads a 200 A noise current generates roughly a 1mV noise voltage across the Alumel lead resistance 0 44 ft Any of this noise t...

Страница 48: ...hanges the differential input into a single ended input If noise picked up electrostatically by the positive and negative leads is similar and therefore much of the noise is essentially a common mode...

Страница 49: ...board or allowing the internal 10k resistor to make such a connection by default causes any noise current between the grounded object and the analog ground to flow across the Low signal lead resulting...

Страница 50: ...another package such as Microsoft Excel Features of the DAS TC B Data Logger You can do the following with the DAS TC B Data Logger Configure the DAS TC B input channels Specify the signal characteris...

Страница 51: ...Topics Keithley DAS TC B DriverLINX Data Logger Utility 2 From the menu select DAS TC B Data Logger Starting the DAS TC B Data Logger To start the Data Logger do the following 1 Click the Windows 95...

Страница 52: ...as a Keithley Instruments 196 DMM Figure 6 1 Test Points Perform the DAS TC B calibration process as follows 1 Referring to the diagram connect the positive lead of the meter to TP3 Test Point 3 the...

Страница 53: ...r with a DAS TC B Table 7 1 Troubleshooting Information Symptom Possible Cause Possible Solution Intermittent operation The most common cause of this problem is that the I O bus speed is in excess of...

Страница 54: ...wn in the configuration file If the base address is set correctly make sure no other computer device is using any of the I O locations beginning at the specified base address If necessary reconfigure...

Страница 55: ...ve the DAS TC B board from the computer and visually check for damage If a board is obviously damaged refer to Technical Support on page 7 5 for information on returning the board Data appears to be i...

Страница 56: ...puter power again and install a DAS TC B board that you know is functional Do not make any I O connections 2 Turn computer power on and check operation with the functional board in place This test che...

Страница 57: ..._______ ___________________ ___________________ Computer Manufacturer CPU type Clock speed MHz MB of RAM Video system BIOS type ____________________ ____________________ ____________________ _________...

Страница 58: ...following information Your name address and telephone number The invoice or order number and date of equipment purchase A description of the problem or its symptoms The RMA number on the outside of th...

Страница 59: ...ction 30V maximum for powered 20V maximum for unpowered Isolation to PC 500VDC minimum Input impedance 100M minimum CJC error 0 8 C maximum at 25 C 1 2 C maximum at 0 to 70 C Common mode rejection rat...

Страница 60: ...limits the effective data rate to application programs Table A 3 Temperature Voltage Specifications Feature Value Degrees Celsius or Fahrenheit Temperature voltage data format Integer Real 32 bit sig...

Страница 61: ...R 0 to 299 C 300 to 1768 C 2 3 C 1 5 C 0 1 C 0 08 C 0 2 C 0 1 C 1 0 C 0 6 C S 0 to 299 C 300 to 1450 C 2 3 C 1 7 C 0 1 C 0 09 C 0 2 C 0 1 C 0 1 C 0 7 C T 200 to 120 C 119 to 400 C 0 9 C 0 5 C 0 05 C...

Страница 62: ...B R S or T Type E Types J or K 17ppm C 10ppm C 12ppm C Table A 8 Environmental and Physical Requirements Feature Specification Temperature Ranges Operating Storage 0 to 50 C 20 to 70 C Humidity 0 to...

Страница 63: ...A 5 Table A 10 Board Requirements Feature Specification PC I O base address interface 100h to 3FFh DIP switch selectable Interrupt levels DAS TC version A 2 3 4 5 and 7 DAS TC B 3 5 7 10 11 12 and 15...

Страница 64: ...nel 7 Low Input 27 Channel 7 High Input 26 Channel 5 Low Input 20 CJC Voltage Input 15V Isolated Voltage Source 19 Channel 15 Low Input 18 Channel 14 Low Input 17 CJC Return 16 25 Channel 5 High Input...

Страница 65: ...fication applies only to the operation of the product with specified cables and accessories in the stated configuration and under the stated operational and environmental specifications Any modificati...

Страница 66: ...s GMBH Importer s Address Landsberger Str 65 D 82110 Germering Munich Type of Equipment Data Acquisition Plug in Boards Model Numbers DAS TC B and S 1800 with either an STC TC B or STA TC B Year of Ma...

Страница 67: ...oard Figure C 1 Connecting a DAS TC B Board to an STC TC B The STA TC B connects to the main I O connector of the DAS TC B through the S 1800 cable as shown in Figure C 2 Figure C 2 Connecting a DAS T...

Страница 68: ...ection 3 9 C cable C 1800 1 4 4 7 S 1800 1 4 4 7 C 3 calibration 6 1 CE information C 1 certification C 1 CHASSIS GND terminal on accessories using 4 6 4 11 4 12 4 13 4 14 4 15 checking the installati...

Страница 69: ...necting 4 12 grounding electrostatic handling to protect board 3 8 to protect board 3 8 grounds on accessories 4 6 types 4 5 using 4 6 4 11 4 12 4 13 4 14 4 15 I inputs explanation 4 9 schematic 4 8 i...

Страница 70: ...grounded source general connecting 4 14 software DriverLINX description 1 2 installing 3 3 included with board 1 2 LabVIEW description 1 4 installing 3 3 TestPoint description 1 3 installing 3 2 spec...

Страница 71: ...couple connecting 4 10 utility Data Logger 5 1 V Visual Basic DriverLINX driver for 1 2 Visual C C DriverLINX driver for 1 2 voltage input specifications A 2 W warranty repairs 7 6 wrapper anti static...

Страница 72: ...e 65 82110 Germering 089 84 93 07 40 Fax 089 84 93 07 34 GREAT BRITAIN Unit 2 Commerce Park Brunel Road Theale Berkshire RG7 4AB 0118 929 7500 Fax 0118 929 7519 INDIA Flat 2B Willocrissa 14 Rest House...

Страница 73: ...uipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentat...

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