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1. DAS board to unipolar no negative voltage and amplifying the sign wave signal by 5 the entire range of the A D converter is used and a higher resolution measurement may be made In order to match your signals with the input range of the A D board you should do a similar calculation and set switches on the CyEXP RTD for the correct gain Gain or amplification allows you to boost your signal to take full advantage of the resolution of the A D converter While amplifying the signal any noise is amplified as well If your signal ranges greater than 5V please go to section on attenuation The first stage has gain options of 1 2 4 or 8 and the second stage gain options are 1 7 or CUSTOM 7 To choose a switch selectable amplification calculate as follows If your signal is bipolar divide 10 by the full range of the signal For example if your signal ranges between 1 2 volt the full range is 1 volt Divide 10 by 1 for a result of 10 That is the maximum gain you can use If your signal is unipolar and ranges less than O to 5V divide 5 by the full range of the signal For example if the signal ranges from 0 to 1 2 volt the full range is 1 2 volt Divide 5 by 0 5 for a result of 10 That is the maximum gain you can use 4 4 SETTING THE GAIN 4 4 1 First Stage Gain Switch A set of three Gain Select switches on the GAN S1 switch block selects the first stage gain SELECT Figure 4 1 The fourth switch on this block marked CUS2. One individual channel must be selected for each bank of 16 EXP channels For example if you are using several CyEXP RTD boards the jumper setting for each board must be unique If you select channel 0 for the first board do not use this channel for any of the other boards Figure 3 3 is a diagram of the jumper positions 01234567 8 9 101112131415 Place the jumper on the pin which corresponds to the A D board s input channel CHANNEL 0 SELECTED FOR BOARD OUTPUT Figure 3 3 Channel Selection Jumper Locations 3 3 CONFIGURING THE A D BOARD 3 3 1 CyDAS 8 Family Setup The input mode of the A D board must be single ended to be compatible with the CyEXP outputs Some of the boards in the CyDAS 8 series have differential inputs that can be converted to single ended inputs See the information shipped with your A D board for conversion to single ended inputs 3 3 2 CyDAS 16 Family Setup The input mode of the A D board must be single ended to be compatible with the CyEXP outputs Most of the CyDAS 16 series is switch selectable for either 8 differential or 16 single ended inputs When used with the CyEXP set the switch to 16 channel single ended mode 3 3 3 All A D Boards If the range of your A D board is switch selectable and you are using RTDs set the range of the A D board to 5V Unipolar if available or 10V Unipolar if not Some software packages base the calculation of temperature on these ranges only The optional Uni
3. excitation current flowing in the sense leads and this resistance is added to the measurement The amount of inaccuracy is determined by the wire gauge and length 5 6 2 Three Wire RTD Hookup A three wire RTD connection allows the use of special circuit to compensate for resistance variations in the lead wires with temperature changes Figure 5 5 at right NOTE The Sense terminal is not used in this non standard hookup 16 CYEXP RTD BOARD 2 WIRE L RTD IEXC EXCITATION CURRENT SENSE l I SENSE Add Jumper Wires Between Terminals Figure 5 4 Two Wire RTD Connections 3 WIRE CYEXP RTD BOARD RTD L IEXC EXCITATION CURRENT SENSE ll ol e SENSE re IEXC EXCITATION CURRENT NOTE The CYEXP RTD uses a non standard 3 wire hook up Figure 5 5 Three Wire RTD Connections 5 6 3 Four Wire RTD Hookup A four wire RTD has four leads One to each side Pa of the temperature sensitive resistor and an excitation current source and return This connection eliminates the inaccuracy associated with the two wire RTD hookup Because no wiRE current flows on the sense lines there is no voltage RTD drop in the sense lines thus the error associated with two wire RTDs is eliminated EXCITATION CURRENT SENSE HIGH SENSE LOW EXCITATION CURRENT Figure 5 6 Four Wire RTD Hookup 5 7 CALIBRATION AND TEST After your CyEXP RTD is configured and your RTDs are
4. sn ae 5 339 1 Power SOUICE SWCD aus sled caer des irse dr db 5 3 5 2 Powering with the 37 Pin Connector al een 5 3 5 3 Powering with the CBL MOL10 cable ae sa aa 5 3 6 DAISY CHAINING CYEXP RTD BOARD 0 00 0 0 ccc nee 6 3 7 CONNECTING A VOLTAGE SIGNAL ia er 6 3 8 VERIFYING THE INSTALLATION 0 ccc ccc cece cette ete eens 6 4 VOLTAGE MEASUREMENT CONFIGURATION 222222ccceeeeen 7 4 PCEHANNELSECECTION Ze ict de ibial Ge cot ee n e ar 7 4 2 POWER SOURCE SWITCH eoar irene dean ee 7 4 3 DETERMINING THE APPROPRIATE GAIN ooohhh 00 cc cece 7 4A SETTING THE GAIN mata risas 8 44 1 Parse Slade Gan SWIC settings 8 4 4 2 Second Stage Gain Switch a OREO 8 4S ATTENUATION rro rs Riot sie ee ee ren endet 9 4 6 CHANNEL CONFIGURATION SWITCH 0 0 00 eens 9 4 7 CONNECTING VOLTAGE SIGNALS aa A ten 9 II ES 9 AZ Dloat ne Ditierental e Reis 10 Ar Puly Differential RA ee en 11 5 RTD MEASUREMENT CONFIGURATION 0 000 000 cece eee 12 3 CHANNEL SELECTION 2 22 bees Les Bed WAG Wa ea es HE Es 12 5 2 POWER SOURCE WITCH pearen erin bed dieses ie 12 5 3 DETERMINING THE APPROPRIATE GAIN 0 0 00 c o 12 ASE TUNE THE GAIN var A BEE 13 5 4 1 Birst Slate Gali ops ee EN RETO A a ia 14 5 4 2 Second Stace Gaur tia vata ee Rew eek Mera VRE Rak Kp RS ae eS 14 5 5 CHANNEL CONFIGURATION SWITCH 0 00 enes 15 5 6 CONNECTING THE RTD TO THE SCREW TERMINALS 5 15 111 5 62 TWO WIERTD H
5. CyEXP RTD 16 Channel Expansion Multiplexing Panel RTD Signal Conditioning USER S MANUAL VER 2 NOV 2000 No part of this manual may be reproduced without permission CyberResearch Inc www cyberresearch com 25 Business Park Dr Branford CT 06405 USA 203 483 8815 9am to 5pm EST FAX 203 483 9024 OCopyright 2000 All Rights Reserved November 2000 The information in this document is subject to change without prior notice in order to improve reliability design and function and does not represent a commitment on the part of CyberResearch Inc In no event will CyberResearch Inc be liable for direct indirect special incidental or consequential damages arising out of the use of or inability to use the product or documentation even if advised of the possibility of such damages This document contains proprietary information protected by copyright All rights are reserved No part of this manual may be reproduced by any mechanical electronic or other means in any form without prior written permission of CyberResearch Inc TRADEMARKS CyberResearch CyEXP RTD CyDAS 8 and CyDAS 16 are trademarks of CyberResearch Inc Other product names mentioned herein are used for identification purposes only and may be trademarks and or registered trademarks of their respective companies e NOTICE CyberResearch Inc does not authorize any CyberResearch product for use in life support system
6. Differential Voltage Input CAUTION Verify that the signal source is really floating Check it with a voltmeter before risking the CyEXP RTD and PC 10 4 7 3 Fully Differential A differential signal has three wires from the signal source The signals are Signal High Signal Low and Signal Ground IEXC which is LLGND A differential connection allows you to connect the CyEXP RTD to a signal source with a ground that is different from the PC ground but less than 10V difference and still make a true measurement of the signal EXAMPLE A laboratory instrument with its own wall plug NOTE There are sometimes voltage differences in wall GND between outlets Measure it to verify that it doesn t exceed 10V 11 h n leg wi s z 8 A x 8 mn a E A O e Ground cable shield at IE terminal only Voltage Signal Low a Signal High Differential Voltage Input Figure 4 7 Differential Voltage Input 5 RTD MEASUREMENT CONFIGURATION An RTD is a temperature sensor that consist of a resistive element usually a length of wire encased in a sheath Various wire materials are used with platinum being the most common There are three types of hookups two wire three wire and four wire 5 1 CHANNEL SELECTION The General Configuration section describes the channel selection setting the jumper and verifying the installation and operation of the CyEXP RTD with your data a
7. If your signal range is greater than 5V you RES IN will have to divide it until the result is less than a or equal to 5V for bipolar or 0 5V for unipolar signals A voltage divider is constructed from a pair of precision resistors selected according to the equation Rb Volts In OUT RES OUT Volts Divided Attenuation R1 R2 R2 PC GROUND You will need to construct the voltage divider RES OUT remote from the CyEXP RTD PC GROUND Figure 4 3 Voltage Divider Schematic 4 6 CHANNEL CONFIGURATION SWITCH A channel configuration switch is associated with each channel The switch is used to configure the so w s amp INPUTCONFIG gt uo s input circuit for 2 3 or 4 wire hookup to RTDs NOTE When doing voltage measurements set E I E I I I E o the switches to the 4 wire position switches labeled 4 in white on the board in the ON position switches labeled 3 OFF Set for 2 or 4 Wire Connection Set for 3 Wire Connection Figure 4 4 Channel Configuration Switches 4 7 CONNECTING VOLTAGE SIGNALS Voltage signals may be single ended or differential and the full scale may have to be matched to the range of the CyEXP RTD and DAS board combination via amplification or division To connect a voltage and make an accurate measurement each of these factors must be considered 4 7 1 Single Ended A single ended input has two wires a signal high and a Ground IEXC The Low Level Ground s
8. TOM is used to select a custom second stage gain When all three switches are up the first stage gain is 1 Moving a switch down selects that gain The other two switches should be up Gains choices for the first stage are NOT additive BE Bu WOLSND TX vx 8X Thus gains of 1 2 4 or 8 can be selected by these switches A gain of X2 is shown in Figure 4 1 Figure 4 1 First Stage Gain Select Switches S1 4 4 2 Second Stage Gain Switch Switch 3 on the S2 DIP switch block Figure 4 2 is labeled X1 and X7 Setting this switch down ON will amplify the output of the first stage amplifier by 7 The factory default position up has a gain of 1 unity Wad S IX 9X31 WOLSND When set to X7 the first stage gain is multiplied by 7 yielding overall gains of 7 14 28 or 56 A custom second stage gain of greater than 7 and less than 64 may be added by installing a precision resistor at RX 100 and setting the switch L marked CUSTOM on Zz x dINOD S VWI OX4I Figure 4 2 Second Stage Gain Switch 3 of S2 8 When using the custom second stage gain set the switch marked CUSTOM on the S1 bank to the ON position down and set the X7 switch on the S2 bank to the ON position X7 Install a precision resistor of the appropriate value in the RX100 location Calculate the value using the formula found in the Custom Gain and Excitation Calculations chapter 4 5 ATTENUATION
9. ce ohms 200 18 49 100 60 25 0 100 00 100 138 50 200 175 84 300 212 02 400 247 04 At a temperature of 400 C the maximum resistance is 247 04 ohms The equation for the voltage out of the CyEXP RTD the voltage your DAS board will convert into a number is Vour lexc Rem GAIN Normally the CyEXP RTD supplies 1 mA of excitation current The choices for standard gains are 1 2 4 7 8 14 28 or 56 Thus if you want to measure temperature in the range of 200 to 400 C with the RTD listed above the maximum voltage output would be V 0 001 247 04 0 24704 With a gain of 14 the DAS board will read 3 459 volts If the gain is 28 the output is 6 917 volts The DAS board would have to be set to the 0 to 10 volt range If you are limiting your range of interest to 200 to 100 C a common range the calculations are V 0 001 138 50 0 1385 Gain of 28 3 878V Gain of 56 7 756V In this case a gain of 28 and a range of 0 to 5 volts would be best 0 517 to 3 878 volts would be the temperature range 200 to 100 A 12 bit A D converter would be using 67 of its range of 4096 counts or a total of 2752 counts or divisions of 300 C The converter would be able to resolve to 0 109 C That is more than enough converter resolution even though you are not using the full range of the DAS board in this example If your DAS board has 16 bits of resolution the DAS board would resolve to 0 006 C This is far in e
10. connected return to InstaCal and complete the setup information Then use calibration to verify the calibration of your RTDs and finally use TEST to make several temperature measurements 6 CUSTOM GAIN AND EXCITATION CALCULATIONS There are resistor positions on the CyEXP RTD which are unpopulated These two resistors are labeled R89 and RX100 R89 is the custom excitation current resistor and RX100 is the custom second stage gain resistor The formulas and constraints to needed to calculate a resistor value are given below The value of the resistor must be exact to yield the result you desire There are two ways to insure the value is exact The first is to measure the resistor with an Ohmmeter to check its value rejecting resistors that do not meet the desired value The second way is to purchase precision resistors with a 1 tolerance Even then it s advisable to check the value with an Ohmmeter before soldering the resistor into the board Please solder carefully Remember you are making a modification to the CyEXP RTD and if it is not made well the quality of the signal may be affected Use only solder with a water soluble flux and be sure to remove all the flux after you have finished soldering Flux residue can add capacitance to a circuit which will affect the signal 6 1 CUSTOM EXCITATION CURRENT R89 The formula for IEXC on the CyEXP RTD is IEXC 10V Vref 5K Where lexc is Minimum 0 1 mA and Maximum 1 mA Vref i
11. cquisition board Configure your boards as described in that section before continuing with this section 5 2 POWER SOURCE SWITCH The General Configuration section describes the power selection options setting the power select switch and verifying the installation and operation of the CyEXP RTD with your data acquisition board Configure your boards as described in that section before continuing with this section 5 3 DETERMINING THE APPROPRIATE GAIN To select the best gain for RTD type base resistance and temperature range consider that RTD resistance changes with temperature but the magnitude of the change also changes with temperature RTD type determines the slope of the ohms vs temperature curve The most popular type has an alpha of 00385 known as the European standard Its value is 00385 ohms per ohm per C The Universal Library and InstaCal support six different RTD types Please call if you do not see the RTD you are interested in listed here Material alpha Platinum 0 00392 American standard Platinum 0 00391 Platinum 0 00385 European standard Most popular OMEGA s standard also Copper 0 00427 Nickel Iron 0 00581 Nickel Iron 0 00527 To determine which gain to use you must know the maximum temperature the RTD will be used to measure and thus the maximum change in resistance that the RTD will undergo Here is a table for platinum 12 For 100 ohm RTD alpha 00385 Temp C Resistan
12. d CE marking has been applied according to the relevant EC Directives listed below using the relevant section of the following EC standards and other informative documents EU EMC Directive 89 336 EEC Essential requirements relating to electromagnetic compatibility EU 55022 Class B Limits and methods of measurements of radio interference characteristics of information technology equipment EN 50082 1 EC generic immunity requirements IEC 801 2 Electrostatic discharge requirements for industrial process measurement and control equipment IEC 801 3 Radiated electromagnetic field requirements for industrial process measurements and control equipment IEC 801 4 Electrically fast transients for industrial process measurement and control equipment
13. e CyEXP RTD use the InstaCal program installed on your computer This software came with your A D board if you bought the board from the same manufacturer as the CyEXP RTD If your A D board is not from the same manufacturer but is compatible please call technical support and request a copy of InstaCal Use InstaCal s TEST option to verify that a signal present at one of the CyEXP RTD s inputs can be read You will not need to set any jumpers other than those previously mentioned and should not set any switches or install any passive components until you have verified the installation 6 4 VOLTAGE MEASUREMENT CONFIGURATION The CyEXP RTD is an amplification signal conditioning and multiplexing accessory for DAS boards The inputs are suitable for connecting a voltage to the DAS board so it may be measured The CyEXP RTD is a one of sixteen multiplexer which means that for every channel in your DAS board you can multiplex sixteen different signals into it You can expand the number of inputs of your DAS board by sixteen for every CyEXP RTD board up to the number of inputs on the DAS board For example a CyDAS 8 has eight inputs Eight times sixteen is one hundred and twenty eight Using CyEXP RTD boards you can bring 128 inputs into the PC with one CyDAS 8 in one slot It is unlikely that you purchased a CyEXP RTD to measure voltages The CyEXP RTD has quite a bit of special circuitry designed for RTD sensors For only voltage measur
14. e this connector soma 1 O diagram to construct a cable ua oumors is m 2 oumuro 1 0 e 0 QUIFUT The signal from the CyEXP RTD is a ourrurio w 0 e 25 OUIRUT2 multiplexed voltage from each RTD input to a OUTPUT 1 5 0 a eee single jumper selected channel and an analog oururn n 0 qq otr ground LLGND There should be no voltage orn n 0 u om between analog ground and power ground OUTPUT 14 p 0 O RA OUTPUT15 n 0 0 30 OUTPUT7 The MUX address lines control the setting of DO 0 29 45 VOLTS FROMPC the channel multiplexer When all are low the MuxADDR3 o 28 POWER GROUND mux is set to channel 0 The lines are binary MUXADDR2 3 BO e 7 NC coded with MUXADDR 1 being the LSB and MUX ADDR 7 0 e NC MUXADDR4 being the MSB nce 56 9 gt 5 NC 4 0 24 NC The output digital address lines from an A D 0 O s oe NC 4 card are typically named Dig Out 0 to Dig e O ie ONE Out 3 respectively p e gt AL E Na o 0 4 20 NC Figure 3 4 37 Pin Connector Pin Out 3 5 POWERING THE CYEXP RTD The CyEXP RTD can be powered through the 37 pin cable or the Molex connector The power that can be carried through the 37 pin connector is limited so we recommend this only when a single CyEXP RTD is used The power required to run a CyEXP RTD channel is dependent on the sensor connected to it Voltage measurements do not draw additional power from the CyEXP RTD but RTDs do for the excitation current 3 5 1 Power Source Switch One of the swi
15. ements a CyEXP 16 or CyEXP 32 would be less expensive and do the same job However you may have one or two voltages to measure in addition to RTD sensors and would like to connect those signals to the CyEXP RTD This chapter explains how to make those connections 4 1 CHANNEL SELECTION The General Configuration section describes the channel selection setting the jumper and verifying the installation and operation of the CyEXP RTD with your data acquisition board Configure your boards as described in that section before continuing with this section 4 2 POWER SOURCE SWITCH The General Configuration section describes the power selection options setting the power select switch and verifying the installation and operation of the CyEXP RTD with your data acquisition board Configure your boards as described in that section before continuing with this section 4 3 DETERMINING THE APPROPRIATE GAIN To accurately measure a voltage the full scale of the signal should be matched to the full range of the input circuit Most DAS boards have an input range of 5V which is the native range of the analog to digital converter at the heart of the board Some DAS boards include amplification on the input circuit to allow the signal to be amplified to make better use of the resolution of the A D For example a sine wave which varies between 0 and 1 volt would only be using 1 10th of the 5V A D converter s resolution By switching the input signal of the
16. ignal must be the same ground the PC is on Single ended mode is selected by installing a jumper between the signal input low and ground SENSE to IEXC Figure 4 5 9 Each input circuit has four screw terminals associated with it These terminals are shown in Figure 4 5 to the right To connect a voltage signal to the input circuit you only use three screw terminals these are SENSE Signal high or CH HI on a DAS board SENSE Signal low or CH LO on a DAS board IEXC Low Level Ground LLGND 4 7 2 Floating Differential A floating differential input has two wires from the signal source and a 10K ground reference resistor installed at the CyEXP RTD input The two signals from the signal source are Signal High and Signal Low The reference resistor is connected between the CyEXP RTD SENSE and IEXC pins Figure 4 6 A floating differential hookup is handy when the signal source is floating with respect to ground such as a battery powered device The floating differential input will reject up to 10V of EMI energy on the signal wires Add Jumper CHO LO U ASNAS XA HSNAS OXdI Signal Low Voltage Sn ource Gnd Signal High Single Ended Voltage Input Figure 4 5 Single Ended Voltage Input Add 10K Resistor ee l h 4 a 8 5 aa gR is Voltage Signal Low Source Signal High Floating Differential Voltage Input Figure 4 6 Floating
17. l selected CH SEL jumper is set to a different number on each board 3 7 CONNECTING A VOLTAGE SIGNAL Make your initial test of the CyEXP RTD with a simple voltage signal of between 0 and 5V If you have a variable signal source all the better Each input circuit has four screw terminals Add Jumper associated with it These terminals are shown in a Figure 3 6 to the right nS O To connect a voltage signal to the input circuit you ae need only use three screw terminals these are 5 b E EaR a A SENSE Connect the voltage to this j m SENSE Place a wire between this and IEXC a Ez na de Sonic Signal High IEXC Connect the Ground to this Single Ended Voltage Input Figure 3 6 Connection Terminal Block for Voltage Test Channel 0 Shown There is not room on the board for the full name next to each terminal so the eight screw terminals associated with each input circuit are labeled on the CyEXP RTD as follows IEXC High side of RTD excitation current SENSE High side of input signal from voltage or RTD current IEXC Low side of excitation current or chassis ground for volts SENSE Low side of input signal from voltage or RTD The use of the terminals is dependent on the type of sensor you have connected to the input circuit and the nomenclature on the terminals has been chosen to make the most sense for RTD sensors 3 8 VERIFYING THE INSTALLATION To verify the installation test or calibrate th
18. led X1 and X7 Setting this switch down ON will amplify the output of the first stage amplifier by 7 The factory default position up has a gain of 1 unity Wad S IX XI WOLSND When set to X7 the first stage gain is multiplied by 7 yielding overall gains of 7 14 28 or 56 A second stage gain of 7 is recommended for RTD applications dWOS WWI OX4I Figure 5 2 Second Stage Gain Switch Location A custom second stage gain of greater than 7 and less than 64 may be added by installing a precision resistor at RX100 and setting the switch marked CUSTOM on When using the custom second stage gain set the switch marked CUSTOM on the S1 bank to the ON position down and set the X7 switch on the S2 bank to X1 Install a precision resistor of the appropriate value in the RX100 location Calculate the value using the formula found in the Custom Gain and Excitation Calculations chapter 14 5 5 CHANNEL CONFIGURATION SWITCH RTD connections may use 2 3 or 4 wires coming from the probe The three wire connection is the most common The purpose of the three wire connection is that the circuit will null out resistance variations in the connecting wires A four switch DIP switch block labeled INPUT CONFIG must be set to match the number of wires connecting to each RTD There is one switch block per RTD RTD Type INPUT CONHIG Switch Settings 2 Wire 4 amp 40ON 3 amp 3 OFF 3 Wire 3 amp 3 ON 4 a
19. mp 4 OFF 4 Wire 4 amp 4 ON 3 amp 3 OFF Channel Configuration Switch Associated with each RTD is an INPUT CONFIGuration switch The switch is used to configure the input circuit for 2 3 or 4 wire connections Figure 5 3 po ou a INPUTCONFIG amp v a the same switch position Set both 1 4 switches ON and set both 3 switches OFF Two and four wire connections share N 0 N For three wire connection set both 3 switches ON and set both 4 switches OFF Set for 2 or 4 Wire Connection Set for 3 Wire Connection Figure 5 3 Input Configuration Switches 5 6 CONNECTING THE RTD TO THE SCREW TERMINALS The connections made to the screw terminal depend on the type of RTD you are using The inputs of the CyEXP RTD are designed to provide the excitation and signal conditioning required to use RTDs An RTD may have 2 3 or 4 wires that connect to the CyEXP RTD Figures 5 4 5 5 and 5 6 show the three types of RTD connections and how to connect them to the input channels 15 5 6 1 Two wire RTD Hookup A two wire RTD has two leads one to each side of the temperature sensitive resistor The excitation current is connected directly to the leads at the CyEXP RTD screw terminals A two wire connection is less accurate than the four wire type and so is not the first choice for the best measurements The reason for the inaccuracy is that there is a varying resistance associated with the
20. n information in 1t about the CyEXP RTD Refer to the Software Installation Manual for complete information To update the InstaCal configuration file to include CyEXP RTD information start InstaCal select the board number of the DAS board that has the CyEXP RTD connected to it and select the channel number the CYEXP RTD is connected to The options for the CYEXP RTD will be available to set and change After this is done you can use the InstaCal calibrate and test options You must use InstaCal to update and configure the configuration file CB CFG to include the CyEXP RTD settings before you can use the CyEXP RTD with InstaCal Universal Library and some applications packages Initially accept the default settings so that you can verify the installation You may have to go back and make changes with InstaCal once you have selected a sensor and read the section on installing that sensor 3 GENERAL CONFIGURATION 3 1 A D BOARD TYPE SELECT JUMPER The CyEXP RTD may be used with either CyDAS 8 or CyDAS 16 family boards because the signal assignments of the 37 pin connector match those of the CyDAS 8 and may be adapted to those of the CyDAS 16 with a CyEXP DAS16 10 cable Jumper JB10 on the CyEXP RTD board located near the 37 pin connectors is used to select the either the CyDAS 8 or CyDAS 16 A D board family ilk The jumper is shown here with the CyEXP RTD configured for DASO8 DAS16 use with a CyDAS 8 family board Select the A D board
21. nge 7 SPECIFICATIONS 380mA typical 533mA max HI507 16 differential 10V X1 X2 X4 or X8 X1 X7 or User defined between X7 and X64 5 uS typical to 0 01 of 5V step 50 uS max to 0 01 of 5V step 0 02 of full scale typical 0 25 of full scale max 0 002 of full scale typical 0 015 of full scale max 0 002 of full scale typical 0 025 of full scale max Each channel adjustable to zero 10 ppm C typical 60uV C typical 40uV C typical 25uV C typical 20uV C typical 10V 94 dB 100 dB 50V 79 Hz low pass filter each channel OP07 10V 19 Current Excitation Excitation Voltage compliance Accuracy Digital Section Digital Type Din 0 2 Din 3 Number of channels Input High Din 0 2 Din 3 Input Low Din 0 2 Din 3 Environmental Operating temperature range Storage temperature range Humidity Switch selectable for 1 mA on board or custom value determined by resistor selection 2V Trimmable HI508 multiplexor 1 CMOS load 4 inputs 2 0 volts min 5 5 volts absolute max 2 4V min 1 7V min 2 0 volts min 5 5 volts absolute max 0 8V max 1 0V max 0 to 60 C 40 to 100 C 0 to 90 non condensing 20 EC Declaration of Conformity We the manufacturer declare under sole responsibility that the product CYEXP RTD RTD Expansion Board Part Number Description to which this declaration relates meets the essential requirements is in conformity with an
22. ookun su SES 16 5 6 2 Three Wire RTD Hookup ua 235 ee ORS Pe 16 3 0 3 KouUr WEERID Hook p raus rd aka is 17 5 7 CALIBRATION AND TEST sn ae 17 6 CUSTOM GAIN AND EXCITATION CALCULATIONS 17 6 1 CUSTOM EXCITATION CURRENT R89 2 0 cence eee 17 6 2 CUSTOM SECOND STAGE GAIN RESISTOR RX100 oonan aaa 18 7 SPECIFICATIONS 5575 oh pote a NA A ee 19 1v 1 INTRODUCTION The CyEXP RTD is a signal conditioning accessory designed for use with the CyDAS 8 and CyDAS 16 family of data acquisition boards Circuitry to excite selected RTDs on a per channel basis converts the RTD s output current to a voltage suitable for conversion by a CyDAS 8 or other analog to digital conversion board This manual is loosely organized into sections that explain the CyEXP RTD Installation Installation and initial setup Voltage Reading Explains how to set up for and make voltage only readings RTD Describes how two three and four wire type RTDs are connected Please carefully read the Installation section and follow the initial installation and test steps Verify the installation with a voltage measurement prior to connecting RTDs and attempting to measure temperature 2 SOFTWARE INSTALLATION There is no software shipped with the CyEXP RTD The CyEXP RTD is an accessory board intended to be used with an A D board such as a CyDAS 8 or CyDAS 16 A program called InstaCal is shipped with every DAS board InstaCal has installatio
23. s medical equipment and or medical devices without the written approval of the President of CyberResearch Inc Life support devices and systems are devices or systems which are intended for surgical implantation into the body or to support or sustain life and whose failure to perform can be reasonably expected to result in injury Other medical equipment includes devices used for monitoring data acquisition modification or notification purposes in relation to life support life sustaining or vital statistic recording CyberResearch products are not designed with the components required are not subject to the testing required and are not submitted to the certification required to ensure a level of reliability appropriate for the treatment and diagnosis of humans Table of Contents TINTRODUCTION ura een ec east 1 2 SOFTWARE INSTALLATION ooo 1 3 GENERAL CONFIGURATION ooa sense 2 3 1 A D BOARD TY PE SELECT JUMPER 1 2 rannte 2 3 2 SETTING THE OUTPUT CHANNEL uc na ea a a 2 3 3 CONFIGURING THE A D BOARD 0 corr 3 53 1 CyYDAS 8 Family Setup sau Dibus ee Keks sd ham id 3 3 3 2 CYDAS 16 Family Sewp na ee ae 3 33 IA vr a erraten en 3 3 4 CONNECTING THE CYEXP RTD TO THE A D BOARD 4 3 4 1 Connecting to a CyDAS 8 Series A D Board 0 00 eee eee 4 3 4 2 Connecting to a CyDAS 16 Series A D Board o oooooccooocccoooc cee 4 343 Oer DATOS ela cil rodea tad ea wens he 4 3 5 POWERING THE CYEXPRTD
24. s nominally 5V so Iexc is nominally 1 mA The procedure for selecting a value for R89 to get a custom excitation current is 17 Calculate a new Vref using the desired lexc Vref 10V 5K lexc Then calculate R89 value R89 10K 2 10V Vref 10V Vref 1 Install the custom excitation current resistor in R89 Set switch S2 position 1 to OFF 6 2 CUSTOM SECOND STAGE GAIN RESISTOR RX100 The formula for calculating the value of RX100 is RX100 149K Gain 6 96 Where Gain cannot be less than 7 nor greater than 64 Install the custom gain resistor at position RX100 next to S1 on board Set S1 switch 4 to ON That is the switch labeled CUSTOM Set the S2 second stage gain to X7 ON Because this is a second stage gain you can still use the first stage gains of 2 4 and 8 or turn them all off for a first stage gain of 1 That will make the second stage gain the only gain more than one 18 Power Consumption 5V Analog Input Multiplexer type Number of channels Input ranges Gain options First stage Second stage Multiplexor switching time Channel to channel settling time Gain Error Gain Non Linearity Gain X1 X2 or X4 Gain X8 Offset Error Gain drift Offset drift Gain X1 Gain X2 Gain X4 Gain X8 Common Mode Range CMRR 60Hz Gain X1 Gain X2 X4 or X8 Absolute maximum input voltage Miscellaneous Analog Output Amplifier type Number of channels Output Ra
25. tches on the four position DIP switch labeled 2 controls the source of the 5V power to the CyEXP RTD Wad St When positioned down 5 COMP the 5V power is drawn from the personal computer through the signal cable In the 5REM position up power is drawn through the MOLEX connector IX OXAl WOLSND The right hand switch selects the source of the excitation current The choices are 1 mA source or a custom current selected by installing a resistor at R89 AND dINOD S VI I OXHI Figure 3 5 Power Source Switch 3 5 2 Powering with the 37 Pin Connector You may power the CyEXP RTD via the 37 pin cable Only one CyEXP RTD can be powered via the 37 pin cable If you are powering multiple boards use the CBL MOL10 cable 3 5 3 Powering with the CBL MOL10 cable The CyEXP RTD may be powered from the PC s power supply by connecting it to that power supply through a CBL MOL10 cable This cable has the same Molex connector that is used inside the PC and so may be connected directly to the PC s power supply through one of the spare connectors The cable is keyed so it should not be forced When inserted properly it will slide easily and snap in place 3 6 DAISY CHAINING CYEXP RTD BOARDS Connect one CyEXP RTD to another using a CBL 37 ribbon cable Connect from P2 on the upstream board to Pl on the downstream board Make sure each of the boards in the chain have a unique channe
26. type CyDAS 8 or CyDAS 16 using the JB 10 jumper Figure 3 1 Figure 3 1 DAS08 16 Select Jumper 3 2 SETTING THE OUTPUT CHANNEL Jumper positions labeled CH SEL located near the 37 pin connectors are used to select one CyEXP RTD output channel to which the output from the addressed RTD will be connected This setting determines which A D channel is used to acquire data from the CyEXP RTD when it is connected to an A D board There are 16 jumpers for the 37D CONNECTOR OUTPUT CHANNEL SELECT output Each jumper corresponds INPUT 0 number on the A D board See Figure 3 2 and 3 3 to one of the 16 output pins on i the 37 pin connector 1 35 QU INPUT 1 When the CyEXP RTD is teed rd CA 1 33 OF connected to a CyDAS 8 series del sol 4 5 I mo board any one of the first 8 131 gt z channels labeled 0 7 may be Md 9 lt lt r 3 INPUT N 118 O used A BE D mi y 16 O i D lt INPUTN 1 When the CyEXP RTD is ee et T connected to a CyDAS 16 series 64 E i i INPUT 13 board any one of 16 jumper po 4 1 ositions may be used ae dl i ru 04 INPUT 14 In each case the jumper a MUX CONTROL corresponds to an input channel INPUT 15 Figure 3 2 Channel Selection Block Diagram NOTE If the jumper setting does not agree with the selection made in InstaCal setup InstaCal and the Universal Library will not be able to make readings from the CyEXP RTD
27. versal Library does allow other ranges but 5V Unipolar is preferred If your A D board has a UNI BIP switch for setting the range to either unipolar or bipolar the preferred setting is UNI unipolar If the range on your A D board is fully programmable the software you use for temperature measurement will determine the correct range to use If you are not using RTDs set the range of the A D board to accommodate the maximum output expected from the CyEXP RTD board 3 4 CONNECTING THE CYEXP RTD TO THE A D BOARD 3 4 1 Connecting to a CyDAS 8 Series A D Board A CyDAS 8 series board may be connected directly through a C37FF series cable from the P1 connector on the CyEXP RTD to the A D analog connector The JB 10 jumper should be left in the CyDAS 8 position as set at the factory 3 4 2 Connecting to a CyDAS 16 Series A D Board The CyEXP can be used with CyDAS 16 series boards expanding the CyDAS 16 s 16 inputs to 256 inputs The connection requires a special 37 conductor cable CBL MX10 since pin relationship of CyEXP and DAS16 signals is not 1 1 Install the CBL MX10 cable connector labeled MUX into the P1 connector of the CyEXP RTD board and the other end into the CyDAS 16 series board s analog connector 3 4 3 Other A D Boards If you need to connect to a board other than those described above call technical support We may have the cable you need gt J A gt gt Alternatively you could us
28. xcess of the accuracy of the RTD The stages of gain you choose are not only dependent on the RTD you choose but on the range of temperature you are measuring Use the equation above to fine tune the CyEXP RTD circuit to your advantage then be sure to update the InstaCal program so the Universal Library linearization routines will operate properly 5 4 SETTING THE GAIN Set the first and second stage gains according to the base resistance of the RTD the RTD type and the temperature range you intend to measure The base resistance is the resistance of the RTD at zero degrees Centigrade The following table is a quick reference guide of recommended gains 13 Base Resistance Stage 1 Gain Stage 2 Gain Total Gain 100 Ohms 8 7 56 1000 Ohms 4 7 28 5 4 1 First Stage Gain A set of three Gain Select switches on the S1 switch block selects the first stage gain Figure 4 4 The fourth switch on this block marked CUSTOM is used to select a custom second stage gain When all three switches are up the first stage gain is 1 Moving a switch down ON selects O that gain The other two switches should be up Gains choices for the first stage are NOT additive GAIN SELECT TX vx 8X Thus gains of 1 2 4 or 8 can be selected by these switches A gain of X2 is shown in Figure 5 1 WOLSND Figure 5 1 First Stage Gain Select Switches 5 4 2 Second Stage Gain Switch 3 on the S2 DIP switch block Figure 5 2 is labe
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