UMDAS TH - CyberResearch
Contents
1. Please make sure that the RMA number is prominently displayed on the outside of the box Thank You CyberResearch Inc 31 25 Business Park Drive P 203 643 5000 F 203 643 5001 Branford CT USA www cyberresearch com UMDAS TH CyberResearch UMDAS TH Intentionally Blank 32 Copyright 2008 CyberResearch Inc CyberResearch Inc 25 Business Park Drive Branford CT 06405 USA P 203 483 8815 F 203 483 9024 www cyberresearch com2. Data Acquisition UMDAS TH USB Data Acquisition Module 8 Channels of TC RTD Thermistor Semiconductor Temperature Input 8 DIO USER S MANUAL VER 8 1C MAY 2008 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 CyberResearch Data Acqusition UMDAS TH Copyright 2008 All Rights Reserved May 16 2008 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 and UMDAS TH 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 CyberRes
3. aorews ZRESZBGOF RASO ZOOO YO0OORL 00OZX O 2 O00YFO00Z2 50000 wO rAMA DROABDOKTAVDNTNONOONDDOrKA ANAM O NANA SOLO LO i OWOOOOOOGOOD OWOOOOOGDGODOOOOO A DWOOOWDDODOO L LOCOOOOOOOOODODDODODO KHNOMOTMOONDDO o TNYONTNOONODOS 0 caes eb O o 2 8322 gt 86088 298838495562 3 42883088589 f b000 Figure 3 1 UMDAS TH screw terminal pin numbers 3 1 UMDAS TH User s Guide Sensor Connections Table 3 1 UMDAS TH screw terminal descriptions Pin Signal Pin Description Pin Signal Pin Description Name Name 1 1 CHO0 CH1 current excitation source 27 14 CH6 CH7 current excitation return 2 NC Not connected 28 GND Ground 3 COH CHO sensor input 29 C7L CH7 sensor input 4 COL CHO sensor input 30 C7H CH7 sensor input 5 4W01 CHO0O CH1 4 wire 2 sensor common 31 1067 CH6 CH7 2 sensor common 6 IC01 CHO0 CH1 2 sensor common 32 4W67 CH6 CH7 4 wire 2 sensor common 7 C1H CH1 sensor input 33 C6L CH6 sensor input 8 CiL CH1 sensor input 34 C6H CH6 sensor input 9 GND Ground 35 NC Not connected 10 l1 CHO0 CH1 current excitation return 36 14 CH6 CH7 current excitation source CJC sensor CJC sensor 11 12 CH2 CH3 current excitation source 37 13 CH4 CH5 current excitation return 12 NC Not connected 38 GND Ground 13 C2H CH2 sensor input 39 C5L CH5 sensor
4. K 1 761 C 0 538 C 210 to 0 C 0 691 C 0 345 C 0 to 1372 C S 2 491 C 0 648 C 50 to 250 C 1 841 C 0 399 C 250 to 1768 1 C R 2 653 C 0 650 C 50 to 250 C 1 070 C 0 358 C 250 to 1768 1 C B 1 779 C 0 581 C 250 to 700 C 0 912 C 0 369 C 700 to 1820 C E 1 471 C 0 462 C 200 to 0 C 0 639 C 0 245 C 0 to 1000 C T 1 717 C 0 514 C 200 to 0 C 0 713 C 0 256 C 0 to 600 C N 1 969 C 0 502 C 200 to 0 C 0 769 C 0 272 C 0 to 1300 C Note 4 Thermocouple measurement accuracy specifications include linearization cold junction compensation and system noise These specs are for one year or 3000 operating hours whichever comes first and for operation of the UMDAS TH between 15 C and 35 C For measurements outside this range add 0 5 degree to the maximum error shown There are CJC sensors on each side of the module The accuracy listed above assumes the screw terminals are at the same temperature as the CJC sensor Errors shown do not include inherent thermocouple error Please contact your thermocouple supplier for details on the actual thermocouple error Note 5 Thermocouples must be connected to the UMDAS TH such that they are floating with respect to GND pins 9 19 28 38 The UMDAS TH GND pins are isolated from earth ground so connecting thermocouple sensors to voltages referenced to earth ground is permissible as long as the isolation between th
5. 4 wire measurements Semiconductor temperature sensors LM36 or equivalent The UMDAS TH provides a 24 bit analog to digital A D converter for each pair of differential analog input channels Each pair of differential inputs constitutes a channel pair You can connect a different category of sensor to each channel pair but you can not mix categories among the channels that constitute a channel pair although it is permissible to mix thermocouple types The UMDAS TH provides two integrated cold junction compensation CJC sensors for thermocouple measurements and built in current excitation sources for resistive sensor measurements An open thermocouple detection feature lets you detect a broken thermocouple An on board microprocessor automatically linearizes the measurement data according to the sensor category The UMDAS TH is a standalone plug and play module which draws power from the USB cable No external power supply is required All configurable options are software programmable The UMDAS TH is fully software calibrated 1 1 UMDAS TH User s Guide Introducing the UMDAS TH UMDAS TH block diagram UMDAS TH functions are illustrated in the block diagram shown here Precision 5V Ref En bit se E nee Stet terminal 1 0 Isolator SP Isolated Micro Temp sensor Isolated gt 12 TEV DC DC gt 12 b ra ee panda 24 bit A D Input alr Set terminal 50
6. TH User s Guide Sensor Connections Three wire configuration A three wire configuration compensates for lead wire resistance by using a single voltage sense connection With a three wire configuration you can connect only one sensor per channel pair A three wire measurement configuration is shown in Figure 3 5 O Z l C H CHL O 4W ICHH C H O CHAL GND l O O O O Figure 3 5 Three wire RTD or thermistor sensor measurement configuration When you select a three wire sensor configuration with InstaCal the UMDAS TH measures the lead resistance on the first channel C H C L and measures the sensor itself using the second channel C H C L This configuration compensates for any lead wire resistance and temperature change in lead wire resistance Connections to C H for the first channel and C H C L of the second channel are made internally Three wire compensation For accurate three wire compensation the individual lead resistances connected to the I pins must be of equal resistance value Four wire configuration With a four wire configuration connect two sets of sense excitation wires at each end of the RTD or thermistor sensor This configuration completely compensates for any lead wire resistance and temperature change in lead wire resistance Connect your sensor with a four wire configuration when your application requires very high accuracy measurements Examples of a four wire si
7. from the USB GND Power terminals 5V The two 5V output terminals are isolated 500 VDC from the USB 5V Digital terminals DIOO to DIO7 You can connect up to eight digital I O lines to the screw terminals labeled DIOO to DIO7 Each terminal is software configurable for input or output CJC sensors The UMDAS TH has two built in high resolution temperature sensors One sensor is located on the right side of the package and one sensor is located at the left side Thermocouple connections A thermocouple consists of two dissimilar metals that are joined together at one end When the junction of the metals is heated or cooled a voltage is produced that correlates to temperature The UMDAS TH makes fully differential thermocouple measurements without the need of ground referencing resistors A 32 bit floating point value in either a voltage or temperature format is returned by software An open thermocouple detection feature is available for each analog input which automatically detects an open or broken thermocouple Use InstaCal to select the thermocouple type J K R S T N E and B and one or more sensor input channels to connect the thermocouple 3 3 UMDAS TH User s Guide Sensor Connections Wiring configuration Connect the thermocouple to the UMDAS TH using a differential configuration as shown in Figure 3 2 TII TI_A 3 oaio 00 OO Lobo O Z I O CH u lt Figure 3 2 Ty
8. the UMDAS TH pins 9 19 28 38 are common and are isolated from earth ground If a connection is made to earth ground when using digital I O and conductive thermocouples the thermocouples are no longer isolated In this case thermocouples must not be connected to any conductive surfaces that may be referenced to earth ground 3 8 UMDAS TH User s Guide Functional Details Chapter 4 Functional Details Thermocouple measurements A thermocouple consists of two dissimilar metals that are joined together at one end When the junction of the metals is heated or cooled a voltage is produced that correlates to temperature The UMDAS TH hardware level shifts the thermocouple s output voltage into the A D s common mode input range by applying 2 5 V to the thermocouple s low side at the C L input Always connect thermocouple sensors to the UMDAS TH in a floating fashion Do not attempt to connect the thermocouple low side C L to GND or to a ground referencing resistor Cold junction compensation CJC When you connect the thermocouple sensor leads to the sensor input channel the dissimilar metals at the UMDAS TH terminal blocks produce an additional thermocouple junction This junction creates a small voltage error term which must be removed from the overall sensor measurement using a cold junction compensation technique The measured voltage includes both the thermocouple voltage and the cold junction voltage To compensate for th
9. 0 V 24 a a A D Isolation CH6 CH7 peal Barrier Figure 1 1 UMDAS TH functional block diagram UMDAS TH User s Guide Introducing the UMDAS TH Connecting a UMDAS TH to your computer is easy Installing a data acquisition device has never been easier The UMDAS TH relies upon the Microsoft Human Interface Device HID class drivers The HID class drivers ship with every copy of Windows that is designed to work with USB ports We use the Microsoft HID because it is a standard and its performance delivers full control and maximizes data transfer rates for your UMDAS TH No third party device driver is required The UMDAS TH is plug and play There are no jumpers to position DIP switches to set or interrupts to configure You can connect the UMDAS TH before or after you install the software and without powering down your computer first When you connect an HID to your system your computer automatically detects it and configures the necessary software You can connect and power multiple HID peripherals to your system using a USB hub You can connect your system to various devices using a standard four wire cable The USB connector replaces the serial and parallel port connectors with one standardized plug and port combination You do not need a separate power supply module The USB automatically delivers the electrical power required by each peripheral connected to your system Data can flow two ways between a computer and peripheral o
10. C s USB Host Controller The USB port s on your PC are root port hubs All externally powered root port hubs desktop PC s provide up to 500 mA of current for a USB device Battery powered root port hubs provide 100 mA or 500 mA depending upon the manufacturer A laptop PC that is not connected to an external power adapter is an example of a battery powered root port hub USB specifications Table 15 USB specifications USB device type USB 2 0 full speed Device compatibility USB 1 1 USB 2 0 Self powered 100 mA consumption max USB cable type A B cable UL type AWM 2527 or equivalent min 24 AWG VBUS GND min 28 AWG D D USB cable length 3 meters max UMDAS TH User s Guide Specifications Current excitation outputs Ix Table 16 Current excitation output specifications Parameter Conditions Specification Configuration 4 dedicated pairs 11 CHO CH1 12 CH2 CH3 13 CH4 CH5 14 CH6 CH7 Current excitation output ranges Thermistor 10 uA typ RTD 210 A typ Tolerance 5 typ Drift 200 ppm C Line regulation 2 1 ppm V max Load regulation 0 3 ppm V typ Output compliance voltage 3 90 V max relative to GND pins 9 19 28 38 0 03 V min Note 18 The UMDAS TH has four current excitation outputs with 11 dedicated to the CHO CH1 analog inputs 12 dedicated to CH2 CH3 4 I3 dedicated to CH4 CHS and 14
11. aesaecsaecaaecaeecaeeeseeeaeeeeeeeeeeerentens vil Conventions in this users QUide o lt 2 cccscccecesgecccccecaceecoscnddicuedeshecdcediacsececesencedeecteducesaeseudsedadeecesseddidvetesdtesteede vil Chapter 1 Introducing the UMDAS TH ocoo conocia o ri a ennnen na 1 1 Overview UMDAS TH features ini as 1 1 UMDAS TH block diagram tad dq idas 1 2 Connecting a UMDAS TH to your computer is easy cooococnconcoononoconoconocononn nono nono nonn nono ron ron n rra nr nr rn nn nn nn rn nrnnnnnnss 1 3 Chapter 2 Installing the UMDAS TH ccoo a Na anay iaa NRA erties serdventeeeds 2 1 What comes with your UMDAS TH shipment 0 cceecceseeseeeeeeeceseceeceecseecaeeeseceeeeseeseeeeenaeenaeenseenaeenaes 2 1 Hardware Unpacking the UMDAS TH cui da SETE cdi ida 2 1 Installing the UMDAS TH iii 2 2 Configuring the UMDAS TH E EE E EE E E A 2 2 Calibrating the UMDA S TH taa 2 2 Chapter 3 Sensor GONMECCONS ui t Screw terminal Pio rd Aoc Sensor input terminals COH COL to C7H C TD 0 ccececssesscessessesseeseeseceaecacecseeseceaecaseeseesecaecaeeeseesecaecaaeaaecseeeeesaeeaeeneees Current excitation output terminals 11 to 14 oo ee ceecsseeccesecscesseesceseceaecseeeecescceaecaeeeeceaeceaecaeeeeesaeceaecaeeeeeeaeenaeeneees Four wire two sensor common terminals 4W01 to 4W67 re Two sensor common terminals ICO1 to 1C67 eeececsseeseeseceseesceesceseceaecaeeesensecaaecseeseenseceaesaecaeeecesaeaaecaeeeeenseeeaeeneees Grotin
12. alent and returns a 32 bit floating point value in either a voltage or temperature format Use InstaCal to select the sensor type TMP36 or equivalent and the sensor input channel to connect the sensor Wiring configuration You can connect a TMP36 or equivalent semiconductor sensor to the UMDAS TH using a single ended configuration as shown in Figure 3 9 The UMDAS TH also provides 5V and GND pins for powering the TI I 23305858 ol 20000900000 TMP36 Figure 3 9 Semiconductor sensor measurement configuration The software outputs the measurement data as a 32 bit floating point value in either voltage or temperature 3 7 UMDAS TH User s Guide Sensor Connections Digital I O connections You can connect up to eight digital I O lines to the screw terminals labeled DIOO to DIO7 You can configure each digital bit for either input or output All digital I O lines are pulled up to 5V with a 47 K ohm resistor default You can request the factory to configure the resistor for pull down to ground if desired When you configure the digital bits for input you can use the UMDAS TH digital I O terminals to detect the state of any TTL level input Refer to the schematic shown in Figure 3 10 If you set the switch to the 5V input DIOO reads TRUE 1 If you move the switch to GND DIOO reads FALSE 0 DIOO GND m Figure 3 10 Schematic showing switch detection by digital channel DIOO Caution All ground pins on
13. are for one year while operation of the UMDAS TH unit is between 15 C and 35 C The specification does not include lead resistance errors for 2 wire RTD connections Please contact your sensor supplier for details on the actual sensor error limitations Resistance values greater than 660 ohms cannot be measured by the UMDAS TH in the RTD mode The 660 ohm resistance limit includes the total resistance across the current excitation Ix pins which is the sum of the RTD resistance and the lead resistances For accurate three wire compensation the individual lead resistances connected to the Ix pins must be of equal value Thermistor measurement accuracy Table 7 Thermistor measurement accuracy specifications Thermistor Temperature Range Maximum Accuracy Error C lx 10 pA 2252 Q 40 to120 C 0 05 3000 Q 40 to120 C 0 05 5000 Q 35 to120 C 0 05 10000 Q 25 to120 C 0 05 30000 Q 10 to120 C 0 05 Note 11 Error shown does not include errors of the sensor itself The sensor linearization is performed using a Steinhart Hart linearization algorithm These specs are for one year while operation of the UMDAS TH unit is between 15 C and 35 C The specification does not include lead resistance errors for 2 wire thermistor connections Please contact your sensor supplier for details on the actual sensor error limitations Total thermistor resistance on any given channel pair must not e
14. d terminals ON Dioni AA A A a ibas Power terminals 5V ccceseseeees Digital terminals DIOO to DIO7 GIG SONSOMS irc ico Thermocouple connections cas Wirmg config raO incio a hlra dalla a e ae E a E Eae RTD and thermistor connections Two wire configuration sesesseseeseseeee Three wire configuration 000 is Four wire Configurations ERES EN Semiconductor sensor Measurements seeeeceeeeecnceeeceseceeesecseesecueesccesecsessecaeesecneeeceaeeeeeaecateeecneseeesaeeeeeaeeaees Wiring configuration Digit l VO Connection A ails ines Chapter 4 ca AAA Pm TN Thermocouple measurements Cold junction compensation CJC Data linearization Open thermocouple detection OTD RTD and thermistor measurements Data linearization USB connectot 006 UMDAS TH User s Guide Chapter 5 Specificati hs iii Ai VAA OTET ET OO Chamel COMU eo fe tod eo de ae le a e Compatible a e Id dees Ms ae a ACCUAN n ed ebb caine ee area ahaa anne ed a e nde Thermocouple measurement accuracy ides sd Semiconductor sensor measurement ACCULACY ceeeeseesceescesecseeseesecesecssecseesecsaecssecsecseesecsaecasecseeseeeaueatecseeeeseaeceaeeneees 5 3 RTD Measurement ACCUTANE A nd ini 5 3 Thermistor measurement accuracy ecececeescessesseeseesecesecsseeseesecusecseeeseesecsaecaseesceseceaecsecaeeeseeseceaecaeeeeaeceaecaeeeeeeae
15. dedicated to CH6 CH7 The excitation output currents should always be used in this dedicated configuration Note 19 The current excitation outputs are automatically configured based on the sensor thermistor or RTD selected Environmental Table 17 Environmental specifications Operating temperature range Storage temperature range 0 to 70 C 40 to 85 C Humidity 0 to 90 non condensing Mechanical Table 18 Mechanical specifications Dimensions 127 mm L x 88 9 mm W x 35 56 H User connection length 3 meters max 5 8 UMDAS TH User s Guide Specifications Screw terminal connector type and pin out Table 19 Screw terminal connector specifications Connector type Screw terminal Wire gauge range 16 AWG to 30 AWG Screw terminal pin out Table 20 Screw terminal pin out Pin Signal Name Pin Description Pin Signal Name Pin Description 1 CHO CH1 current excitation source 27 14 CH6 CH7 current excitation return 2 NC 28 GND 3 COH CHO sensor input 29 C7L CH7 sensor input 4 COL CHO sensor input 30 C7H CH7 sensor input 5 4WO01 CHO CH1 4 wire 2 sensor common 31 1067 CH6 CH7 2 sensor common 6 IC01 CHO0 CH1 2 sensor common 32 4W67 CH6 CH7 4 wire 2 sensor common 7 C1H CH1 sensor input 33 C6L CH6 sensor input 8 C1iL CH1
16. e GND pins and earth ground is maintained Note 6 When thermocouples are attached to conductive surfaces the voltage differential between multiple thermocouples must remain within 1 4 V For best results we recommend the use of insulated or ungrounded thermocouples when possible Semiconductor sensor measurement accuracy Table 5 Semiconductor sensor accuracy specifications Sensor Type Temperature Range C Maximum Accuracy Error TMP36 or equivalent 40 to 150 C 0 50 C Note 7 Error shown does not include errors of the sensor itself These specs are for one year while operation of the UMDAS TH unit is between 15 C and 35 C Please contact your sensor supplier for details on the actual sensor error limitations RTD measurement accuracy Table 6 RTD measurement accuracy specifications RTD Sensor Maximum Accuracy Error C Typical Accuracy Error C Temperature Ix 210 pA Ix 210 pA PT100 DIN US or 200 C to 150 C 2 85 2 59 ITS 90 150 C to 100 C 1 24 0 97 100 C to 0 C 0 58 0 31 0 C to 100 C 0 38 0 11 100 C to 300 C 0 39 0 12 5 3 UMDAS TH User s Guide Specifications 300 C to 600 C 0 40 0 12 Note 8 Note 9 Note 10 Error shown does not include errors of the sensor itself The sensor linearization is performed using a Callendar Van Dusen linearization algorithm These specs
17. e additional cold junction voltage the UMDAS TH subtracts the cold junction voltage from the thermocouple voltage The UMDAS TH has two high resolution temperature sensors that are integrated into the design of the UMDAS TH One sensor is located on the right side of the package and one sensor is located at the left side The CJC sensors measure the average temperature at the terminal blocks so that the cold junction voltage can be calculated A software algorithm automatically corrects for the additional thermocouples created at the terminal blocks by subtracting the calculated cold junction voltage from the analog input s thermocouple voltage measurement Increasing the thermocouple length If you need to increase the length of your thermocouple use the same type of thermocouple wires to minimize the error introduced by thermal EMFs Data linearization After the CJC correction is performed on the measurement data an on board microcontroller automatically linearizes the thermocouple measurement data using National Institute of Standards and Technology NIST linearization coefficients for the selected thermocouple type The measurement data is then output as a 32 bit floating point value in the configured format voltage or temperature Open thermocouple detection OTD The UMDAS TH is equipped with an open thermocouple detection for each analog input channel With OTD any open circuit or short circuit condition at the thermocou
18. e no longer isolated In this case thermocouples must not be connected to any conductive surfaces that may be referenced to earth ground Memory Table 11 Memory specifications EEPROM 1 024 bytes isolated micro reserved for sensor configuration 256 bytes USB micro for external application use Microcontroller Table 12 Microcontroller specifications Type Two high performance 8 bit RISC microcontrollers USB 5V voltage Table 13 USB 5V voltage specifications Parameter Conditions Specification USB 5V VBUS input voltage range 4 75 V min to 5 25 V max 5 6 UMDAS TH User s Guide Specifications Power Table 14 Power specifications Parameter Conditions Specification Supply current USB enumeration lt 100 mA Supply current Continuous mode 140 mA typ Note 16 User 5V output voltage range Connected to self powered hub Note 17 4 75 V min to terminal block pin 21 and pin 47 5 25 V max User 5V output current Bus powered and connected to a self powered hub Note 17 10 mA max terminal block pin 21 and pin 47 Isolation Measurement system to PC 500 VDC min Note 16 This is the total current requirement for the UMDAS TH which includes up to 10 mA for the status LED Note 17 Self Powered Hub refers to a USB hub with an external power supply Self powered hubs allow a connected USB device to draw up to 500 mA Root Port Hubs reside in the P
19. e voltage measurement is made the resistance of the RTD is calculated using Ohms law the sensor resistance is calculated by dividing the measured voltage by the current excitation level Ix source The value of the Ix source is stored in local memory Once the resistance value is calculated the value is linearized in order to convert it to a temperature value The measurement is returned by software as a 32 bit floating point value in a voltage resistance or temperature format Data linearization An on board microcontroller automatically performs linearization on RTD and thermistor measurements RTD measurements are linearized using a Callendar Van Dusen coefficients algorithm you select DIN SAMA or ITS 90 Thermistor measurements are linearized using a Steinhart Hart linearization algorithm you supply the coefficients from the sensor manufacturer s data sheet USB connector The USB connector provides 5V power and communication No external power supply is required LED The LED indicates the communication status of the UMDAS TH It uses up to 5 mA of current Table 4 2 defines the function of the UMDAS TH LED Table 4 2 LED Illumination LED Indication Illumination Steady green The UMDAS TH is connected to a computer or external USB hub Pulsing green Data is being transferred Upon connection the LED should flash three times and then remain lit indicates a successful installation P
20. eaeeneees 5 4 e 5 5 Digital put ontput a ci 5 6 USB specifications 23 ef io sees cote soos otsesh fhe Ne tees os ated Sa ees aces tate E A A E Sed sechids 5 7 C rrent excitation Outputs KE tii 5 8 Environmental at a ltda ade e de dl a lo lle da dd e a Te o o ae 5 8 Mechanical a A Ghee RARE AR a BADR A A SRR 5 8 Screw terminal connector type and pin Outer e E E O E E AR 5 9 Scr w terminal pin OUt ainin ccc assescces cartes sadeuces coeeeddaccesed ca t E nirien eiie AE EEE e EREE EE SEE aiii E 5 9 vi Preface About this User s Guide What you will learn from this user s guide This user s guide explains how to install configure and use the UMDAS TH so that you get the most out of its USB based temperature measurement features This user s guide also refers you to related documents available on our web site and to technical support resources Conventions in this user s guide For more information on Text presented in a box signifies additional information and helpful hints related to the subject matter you are reading Caution Shaded caution statements present information to help you avoid injuring yourself and others damaging your hardware or losing your data lt tt gt Angle brackets that enclose numbers separated by a colon signify a range of numbers such as those assigned to registers bit settings etc bold text Bold text is used for the names of objects on the screen such as b
21. earch Inc does not authorize any CyberResearch product for use in life support systems 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 CyberResearch Inc iii 25 Business Park Drive P 203 643 5000 F 203 643 5001 Branford CT USA www cyberresearch com UMDAS TH CyberResearch UMDAS TH UMDAS TH Revision Description Date of Issue 8 0 Revision May 2008 8 0C Revision May 16 2008 Copyright 2008 CyberResearch Inc Table of Contents Preface About this User s Guide cccccccsssesecesseccnneesecneseeeeneeeeeuauseeeenauseeeaueuseauaususeeuauseeeauseseuaueeeausnaeesnanes Vii What you will learn from this user s QUIdC ccececeseesseescesseeeeeeeeeseeseceeceaecs
22. el 10 S s total 2 S s on each channel 12 S s total 2 S s on each channel 14 S s total 2 S s on each channel 16 S s total COPA DAD MM BR Ww Ne Note 14 The analog inputs are configured to run continuously Each channel is sampled twice per second The maximum latency between when a sample is acquired and the temperature data is provided by the USB unit is approximately 0 5 seconds UMDAS TH User s Guide Specifications Digital input output Table 10 Digital input output specifications Digital type CMOS Number of I O 8 DIOO through DIO7 Configuration Independently configured for input or output Power on reset is input mode Pull up pull down configuration All pins pulled up to 5 V via 47 K resistors default Pull down to ground GND also available Digital I O transfer rate software paced Digital input 50 port reads or single bit reads per second typ Digital output 100 port writes or single bit writes per second typ Input high voltage 2 0 V min 5 5 V absolute max Input low voltage 0 8 V max 0 5 V absolute min Output low voltage IOL 2 5 mA 0 7 V max Output high voltage IOH 2 5 mA 3 8 V min Note 15 All ground pins on the UMDAS TH pins 9 19 28 38 are common and are isolated from earth ground If a connection is made to earth ground when using digital I O and conductive thermocouples the thermocouples ar
23. equipment The equipment warranty shall constitute the sole and exclusive remedy of any Buyer of Seller equipment and the sole and exclusive liability of the Seller its successors or assigns in connection with equipment purchased and in lieu of all other warranties expressed implied or statutory including but not limited to any implied warranty of merchant ability or fitness and all other obligations or liabilities of seller its Successors or assigns The equipment must be returned postage prepaid Package it securely and insure it You will be charged for parts and labor if the warranty period has expired Returns and RMAs If a CyberResearch product has been diagnosed as being non functional is visibly damaged or must be returned for any other reason please call for an assigned RMA number The RMA number is a key piece of information that lets us track and process returned merchandise with the fastest possible turnaround time PLEASE CALL FOR AN RMA NUMBER Packages returned without an RMA number will be refused In most cases a returned package will be refused at the receiving dock if its contents are not known The RMA number allows us to reference the history of returned products and determine if they are meeting your application s requirements When you call customer service for your RMA number you will be asked to provide information about the product you are returning your address and a contact person at your organization
24. fied rated accuracy of measurements For RTD or thermistor measurements this warm up time is also required to stabilize the internal current reference Calibrating the UMDAS TH The UMDAS TH is fully calibrated via software InstaCal prompts you to run its calibration utility when you change from one sensor category to another Allow the UMDAS TH to operate for at least 30 minutes before calibrating This warm up time minimizes thermal drift and achieves the specified rated accuracy of measurements 2 2 Chapter 3 Sensor Connections The UMDAS TH supports the following temperature sensor types Thermocouple types J K R S T N E and B Resistance temperature detectors RTDs 2 3 or 4 wire measurement modes of 100 Q platinum RTDs Thermistors 2 3 or 4 wire measurement modes Semiconductor temperature sensors LM36 or equivalent Sensor selection The type of sensor you select will depend on your application needs Review the temperature ranges and accuracies of each sensor type to determine which is best suited for your application Screw terminal pin out The UMDAS TH has four rows of screw terminals two rows on the top edge of the housing and two rows on the bottom edge Each row has 26 connections Between each bank of screw terminals are two integrated CJC sensors used for thermocouple measurements Signals are identified in Figure 3 1 5 2 1 QIINSIJI E Q lo
25. full scale range of the board 3 Check the other boards in your PC or modules on the network for address and interrupt conflicts 4 Refer to the example programs as a baseline for comparing code CyberResearch Inc 29 25 Business Park Drive P 203 643 5000 F 203 643 5001 Branford CT USA www cyberresearch com UMDAS TH CyberResearch UMDAS TH Intentionally Blank 30 Copyright 2008 CyberResearch Inc Cyber Research Data Acqusition UMDAS TH Warranty Notice CyberResearch Inc warrants that this equipment as furnished will be free from defects in material and workmanship for a period of one year from the confirmed date of purchase by the original buyer and that upon written notice of any such defect CyberResearch Inc will at its option repair or replace the defective item under the terms of this warranty subject to the provisions and specific exclusions listed herein This warranty shall not apply to equipment that has been previously repaired or altered outside our plant in any way which may in the judgment of the manufacturer affect its reliability Nor will it apply if the equipment has been used in a manner exceeding or inconsistent with its specifications or if the serial number has been removed CyberResearch Inc does not assume any liability for consequential damages as a result from our products uses and in any event our liability shall not exceed the original selling price of the
26. input 14 C2L CH2 sensor input 40 C5H CH5 sensor input 15 4W23 CH2 CH3 4 wire 2 sensor common 41 1045 CH4 CH5 2 sensor common 16 1023 CH2 CH3 2 sensor common 42 4W45 CH4 CH5 4 wire 2 sensor common 17 C3H CH3 sensor input 43 C4L CH4 sensor input 18 C3L CH3 sensor input 44 C4H CH4 sensor input 19 GND Ground 45 NC Not connected 20 12 CH2 CH3 current excitation return 46 13 CH4 CH5 current excitation source 21 5V 5V output 47 5V 5V output 22 GND Ground 48 GND Ground 23 DIOO Digital Input Output 49 DIO7 Digital Input Output 24 DIO1 Digital Input Output 50 DIO6 Digital Input Output 25 DIO2 Digital Input Output 51 DIO5 Digital Input Output 26 DIO3 Digital Input Output 52 DIO4 Digital Input Output Use 16 AWG to 30 AWG wire for your signal connections Tighten screw terminal connections When making connections to the screw terminals be sure to tighten the screw until tight Simply touching the top of the screw terminal is not sufficient to make a proper connection Sensor input terminals COH COL to C7H C7L You can connect up to eight temperature sensors to the differential sensor inputs COH COL to C7H C7L Supported sensor categories include thermocouples RTDs thermistors or semiconductor sensors Do not mix sensor categories within channel pairs It is permitted to mix thermocouple types J K R S T N E and B within channel pairs however Do not connect two different
27. ngle sensor measurement configuration are shown in Figure 3 6 and Figure 3 7 You can configure the UMDAS TH with either a single sensor per channel or two sensors per channel pair Four wire single sensor A four wire single sensor connected to the first channel of a channel pair is shown in Figure 3 6 LEA ao FOH3 t HZ 283355 VdOVdDOOVOOVDIN Figure 3 6 Four wire single RTD or thermistor sensor measurement configuration 3 6 UMDAS TH User s Guide Sensor Connections A four wire single sensor connected to the second channel of a channel pair is shown in Figure 3 7 Figure 3 7 Four wire single RTD or thermistor sensor measurement configuration A four wire two sensor measurement configuration is shown in Figure 3 8 H Figure 3 8 Four wire two RTD or thermistor sensors measurement configuration When configured for four wire two sensor mode both sensors must be connected to obtain proper measurements Semiconductor sensor measurements Semiconductor sensors are suitable over a range of approximately 40 C to 125 C where an accuracy of 4 C is adequate The temperature measurement range of a semiconductor sensor is small when compared to thermocouples and RTDs However semiconductor sensors can be accurate inexpensive and easy to interface with other electronics for display and control E2 The UMDAS TH makes high resolution measurements of semiconductor sensors such as the LM36 or equiv
28. o produce a voltage drop that can be measured differentially across the sensor The UMDAS TH features four built in current excitation sources I1 to 14 for measuring resistive type sensors Each current excitation terminal is dedicated to one channel pair The UMDAS TH makes two three and four wire measurements of RTDs 100 platinum type and thermistors Use InstaCal to select the sensor type and the wiring configuration Once the resistance value is calculated the value is linearized in order to convert it to a temperature value A 32 bit floating point value in either temperature or resistance is returned by software RTD maximum resistance Resistance values greater than 660 Q cannot be measured by the UMDAS TH in the RTD mode The 660 Q resistance limit includes the total resistance across the current excitation Ix pins which is the sum of the RTD resistance and the lead resistances Thermistor maximum resistance Resistance values greater than 180k ohms cannot be measured by the UMDAS TH in the thermistor mode The 180 k Q resistance limit includes the total resistance across the current excitation Ix pins which is the sum of the thermistor resistance and the lead resistance 3 4 UMDAS TH User s Guide Sensor Connections Two wire configuration The easiest way to connect an RTD sensor or thermistor to the UMDAS TH is with a two wire configuration since it requires the fewest c
29. onnections to the sensor With this method the two wires that provide the RTD sensor with its excitation current also measure the voltage across the sensor Since RTDs exhibit a low nominal resistance measurement accuracy can be affected due to the lead wire resistance For example connecting lead wires that have a resistance of 1 Q 0 5 Q each lead to a 100 Q platinum RTD will result in a 1 measurement error With a two wire configuration you can connect either one sensor per channel pair or two sensors per channel pair Two wire single sensor A two wire single sensor measurement configuration is shown in Figure 3 3 TI ETI_O OHRHRLHRFERHREZ 233530583608 OOOOOODOOOO 1 Figure 3 3 Two wire single RTD or thermistor sensor measurement configuration When you select a two wire single sensor configuration with InstaCal connections to C H and C L are made internally Two wire two sensor A two wire two sensor measurement configuration is shown in Figure 3 4 I J 0 HE 2300 a CHH O C L GND 4w g Figure 3 4 Two wire two RTD or thermistor sensors measurement configuration When you select a two wire two sensor configuration with InstaCal connections to C H first sensor and C H CH L second sensor are made internally When configured for two wire mode both sensors must be connected to obtain proper measurements UMDAS
30. ower The two 5V terminals are isolated 500VDC from the USB 5V Caution Each 5V terminal is an output Do not connect to an external power supply or you may damage the UMDAS TH and possibly the computer 4 10 Specifications Typical for 25 C unless otherwise specified Specifications in italic text are guaranteed by design Analog input Chapter 5 Table 1 Generic analog input specifications Parameter Conditions Specification A D converters Four dual 24 bit Sigma Delta type Number of channels 8 differential Input isolation 500 VDC minimum between field wiring and USB interface Channel configuration Software programmable to match sensor type Differential input voltage range Thermocouple 0 080 V for the various sensor categories RTD 0 to 0 5 V Thermistor 0to2V Semiconductor sensor 0to2 5 V Absolute maximum input voltage C0x through C7x relative to GND pins 9 19 28 38 25 V power on 40 V power off Input impedance 5 Gigohm min Input leakage current Open thermocouple detect 30 nA max disabled Open thermocouple detect 105 nA max enabled Normal mode rejection ratio Jin 60 Hz 90 dB min Common mode rejection ratio Sin 50 Hz 60 Hz 100 dB min Resolution 24 bits No missing codes 24 bits Input coupling DC Warm up time 30 minutes min Open thermocouple detect Automatically enabled when the channel pair is configured for the
31. pical thermocouple connection The UMDAS TH GND pins are isolated from earth ground so connecting thermocouple sensors to voltages referenced to earth ground is permissible as long as the isolation between the GND pins 9 19 28 38 and earth ground is maintained When thermocouples are attached to conductive surfaces the voltage differential between multiple thermocouples must remain within 1 4 V For best results we recommend the use of insulated or ungrounded thermocouples when possible Maximum input voltage between analog input and ground The absolute maximum input voltage between an analog input and the isolated GND pins is 25 VDC when the UMDAS TH is powered on and 40 VDC when the UMDAS TH is powered off If you need to increase the length of your thermocouple use the same type of thermocouple wires to minimize the error introduced by thermal EMFs RTD and thermistor connections A resistance temperature detector RTD measures temperature by correlating the resistance of the RTD element with temperature A thermistor is a thermally sensitive resistor that is similar to an RTD in that its resistance changes with temperature thermistors show a large change in resistance that is proportional to a small change in temperature The main difference between RTD and thermistor measurements is the method used to linearize the sensor data RTDs and thermistors are resistive devices that require an excitation current t
32. ple sensor is detected by the software An open channel is detected by driving the input voltage to a negative value outside the range of any thermocouple output The software recognizes this as an invalid reading and flags the appropriate channel The software continues to sample all channels when OTD is detected Input leakage current With open thermocouple detection enabled 105 nA max of input leakage current is injected into the thermocouple This current can cause an error voltage to develop across the lead resistance of the thermocouple that is indistinguishable from the thermocouple voltage you are measuring You can estimate this error voltage with the following formula error voltage resistance of the thermocouple x 105 nA 4 9 UMDAS TH User s Guide Functional Details To reduce the error reduce the length of the thermocouple to lower its resistance or lower the AWG of the wire by using a wire with a larger diameter With open thermocouple detection disabled 30 nA max of input leakage current is injected into the thermocouple RTD and thermistor measurements RTDs and thermistors are resistive devices that require an excitation current to produce a voltage drop that can be measured differentially across the sensor The UMDAS TH measures the sensor resistance by forcing a known excitation current through the sensor and then measuring differentially the voltage across the sensor to determine its resistance After th
33. rmocouple sensor The maximum open detection time is 3 seconds CJC sensor accuracy 15 C to 35 C 40 25 C typ 40 5 C max 0 C to 70 C 1 0 to 0 5 C max UMDAS TH User s Guide Specifications Channel configurations Table 2 Channel configuration specifications Sensor Category Conditions Specification Disabled Thermocouple 8 differential channels Semiconductor sensor 8 differential channels RTD and thermistor 2 wire input configuration with a single sensor 4 differential channels 2 wire input configuration with two sensors 8 differential channels 3 wire configuration with a single sensor per channel pair 4 differential channels 8 differential channels 4 wire input configuration Note 1 Note 2 Note 3 Internally the UMDAS TH has four dual channel fully differential A Ds providing a total of eight differential channels The analog input channels are therefore configured in four channel pairs with CHO CH1 sensor inputs CH2 CH3 sensor inputs CH4 CHS sensor inputs and CH6 CH7 sensor inputs paired together This channel pairing requires the analog input channel pairs be configured to monitor the same category of temperature sensor Mixing different sensor types of the same category such as a type J thermocouple on channel 0 and a type T thermocouple on channel 1 is valid Channel configuration information is
34. sensor categories to the same channel pair The UMDAS TH provides a 24 bit A D converter for each channel pair Each channel pair can monitor one sensor category To monitor a sensor from a different category connect the sensor to a different channel pair input terminals 3 2 UMDAS TH User s Guide Sensor Connections Current excitation output terminals 11 to 14 The UMDAS TH has four dedicated pairs of current excitation output terminals 11 to 14 These terminals have a built in precision current source to provide excitation for the resistive sensors used for RTD and thermistor measurements Each current excitation terminal is dedicated to one pair of sensor input channels 1 is the current excitation source for channel 0 and channel 1 2 is the current excitation source for channel 2 and channel 2 3 is the current excitation source for channel 4 and channel 5 J4 is the current excitation source for channel 6 and channel 7 Four wire two sensor common terminals 4W01 to 4W67 These terminals are used as the common connection for four wire configurations with two RTD or thermistor sensors Two sensor common terminals IC01 to IC67 These terminals are used as the common connection for two wire configurations with two RTD or thermistor sensors Ground terminals GND The six ground terminals GND provide a common ground for the input channels and DIO bits and are isolated 500 VDC
35. sensor input 34 C6H CH6 sensor input 9 GND 35 NC 10 I1 CHO0 CH1 current excitation return 36 14 CH6 CH7 current excitation source CJC sensor CJC sensor 11 12 CH2 CH3 current excitation source 37 13 CH4 CH5 current excitation return 12 NC 38 GND 13 C2H CH2 sensor input 39 C5L CH5 sensor input 14 C2L CH2 sensor input 40 C5H CH5 sensor input 15 4W23 CH2 CH3 4 wire 2 sensor common 41 1C45 CH4 CH5 2 sensor common 16 1023 CH2 CH3 2 sensor common 42 4W45 CH4 CH5 4 wire 2 sensor common 17 C3H CH3 sensor input 43 C4L CH4 sensor input 18 C3L CH3 sensor input 44 C4H CH4 sensor input 19 GND 45 NC 20 12 CH2 CHS3 current excitation return 46 13 CH4 CH5 current excitation source 21 5V 5V output 47 5V 5V output 22 GND 48 GND 23 DIOO Digital Input Output 49 DIO7 Digital Input Output 24 DIO1 Digital Input Output 50 DIO6 Digital Input Output 25 DIO2 Digital Input Output 51 DIO5 Digital Input Output 26 DIO3 Digital Input Output 52 DIO4 Digital Input Output 5 9 UMDAS TH User s Guide Specifications 5 10 Cyber Research Data Acqusition UMDAS TH Product Service Diagnosis and Debug CyberResearch Inc maintains technical support lines staffed by experienced Applications Engineers and Technicians There is no charge to call and we will return your call promptly if it is received while our lines are busy Most problems encountered with data acquisition produc
36. stored in the EEPROM of the isolated microcontroller by the firmware whenever any item is modified Modification is performed by commands issued over USB from an external application and the configuration is made non volatile through the use of the EEPROM The factory default configuration is Disabled The Disabled mode will disconnect the analog inputs from the terminal blocks and internally ground all of the A D inputs This mode also disables each of the current excitation sources Compatible sensors Table 3 Compatible sensor type specifications Parameter Conditions Thermocouple J 210 C to 1200 C K 270 C to 1372 C R 50 C to 1768 C S 50 C to 1768 C T 270 C to 400 C N 270 C to 1300 C E 270 C to 1000 C B 0 C to 1820 C RTD 100 ohm PT DIN 43760 0 00385 ohms ohm C 100 ohm PT SAMA 0 003911 ohms ohm C 100 ohm PT ITS 90 IEC75 1 0 0038505 ohms ohm C Thermistor Standard 2 252 ohm through 30 000 ohm Semiconductor IC TMP36 or equivalent Accuracy Thermocouple measurement accuracy Table 4 Thermocouple accuracy specifications including CJC measurement error UMDAS TH User s Guide Specifications Sensor Type Maximum error Typical error Temperature range J 1 499 C 0 507 C 210 to 0 C 0 643 C 0 312 C 0 to 1200 C
37. tion is complete The USB LED should flash and then remain lit This indicates that communication is established between the UMDAS TH and your computer Caution Do not disconnect any device from the USB bus while the computer is communicating with the UMDAS TH or you may lose data and or your ability to communicate with the UMDAS TH If the LED turns off If the LED is lit but then turns off the computer has lost communication with the UMDAS TH To restore communication disconnect the USB cable from the computer and then reconnect it This should restore communication and the LED should turn back on Configuring the UMDAS TH All hardware configuration options on the UMDAS TH are programmable with software Use InstaCal to set the sensor type for each channel The configurable options dynamically update according to the selected sensor category Configuration options are stored on the UMDAS TH s isolated microcontroller in EEPROM which is non volatile memory on the UMDAS TH module Configuration options are loaded on power up Default configuration The factory default configuration is Disabled The Disabled mode disconnects the analog inputs from the terminal blocks and internally grounds all of the A D inputs This mode also disables each of the current excitation sources Warm up Allow the UMDAS TH to warm up for 30 minutes before taking measurements This warm up time minimizes thermal drift and achieves the speci
38. ts can be solved over the phone Signal connections and programming are the two most common sources of difficulty CyberResearch support personnel can help you solve these problems especially if you are prepared for the call To ensure your call s overall success and expediency 1 Have the phone close to the PC so you can conveniently and quickly take action that the Applications Engineer might suggest 2 Be prepared to open your PC remove boards report back switch or jumper settings and possibly change settings before reinstalling the modules 3 Have a volt meter handy to take measurements of the signals you are trying to measure as well as the signals on the board module or power supply 4 Isolate problem areas that are not working as you expected 5 Have the source code to the program you are having trouble with available so that preceding and prerequisite modes can be referenced and discussed 6 Have the manual at hand Also have the product s utility disks and any other relevant disks nearby so programs and version numbers can be checked Preparation will facilitate the diagnosis procedure save you time and avoid repeated calls Here are a few preliminary actions you can take before you call which may solve some of the more common problems 1 Check the PC bus power and any power supply signals 2 Check the voltage level of the signal between SIGNAL HIGH and SIGNAL LOW or SIGNAL and SIGNAL It CANNOT exceed the
39. uttons text boxes and check boxes For example 1 Insert the disk or CD and click the OK button italic text Italic text is used for the names of manuals and help topic titles and to emphasize a word or phrase For example The InstaCal installation procedure is explained in the Quick Start Guide Never touch the exposed pins or circuit connections on the board vil Chapter 1 Introducing the UMDAS TH Overview UMDAS TH features This user s guide contains all of the information you need to connect the UMDAS TH to your computer and to the signals you want to measure The UMDAS TH is a USB 2 0 full speed temperature measurement module that is supported under popular Microsoft Windows operating systems The UMDAS TH is fully compatible with both USB 1 1 and USB 2 0 ports The UMDAS TH provides eight differential input channels that are software programmable for different sensor categories including thermocouple RTDs thermistors and Semiconductor sensors Eight independent TTL compatible digital I O channels are provided to monitor TTL level inputs communicate with external devices and to generate alarms The digital I O channels are software programmable for input or output With the UMDAS TH you can take measurements from four sensor categories Thermocouple types J K R S T N E and B Resistance temperature detectors RTDs 2 3 or 4 wire measurements of 100 Q platinum RTDs Thermistors 2 3 or
40. ver USB connections Chapter 2 Installing the UMDAS TH What comes with your UMDAS TH shipment The following items are shipped with the UMDAS TH Hardware UMDAS TH USB cable 2 meter length Unpacking the UMDAS TH As with any electronic device you should take care while handling to avoid damage from static electricity Before removing the UMDAS TH from its packaging ground yourself using a wrist strap or by simply touching the computer chassis or other grounded object to eliminate any stored static charge If your UMDAS TH is damaged notify CyberResearch Inc immediately by phone fax or email Phone 203 643 5000 or 800 341 2525 Fax 203 643 5001 to the attention of Tech Support Email techsupport cyberresearch com 2 1 UMDAS TH User s Guide Installing the UMDAS TH Installing the UMDAS TH To connect the UMDAS TH to your system turn your computer on and connect the USB cable to a USB port on your computer or to an external USB hub that is connected to your computer The USB cable provides power and communication to the UMDAS TH When you connect the UMDAS TH for the first time a Found New Hardware popup balloon Windows XP or dialog other Windows versions opens as the UMDAS TH is detected Found New Hardware i Found New Hardware X UMDAS TH BH vom Window s has tound new hardware and ts locating the sottware for When this balloon or dialog closes the installa
41. xceed 180 k ohms Typical resistance values at various temperatures for supported thermistors are shown in Table 8 5 4 UMDAS TH User s Guide Specifications Table 8 Typical thermistor resistance specifications Temp 22520 3000 Q 5kQ 10kQ 30 kQ thermistor thermistor thermistor thermistor thermistor 40 C 76 KQ 101 kQ 168 kQ 240 kQ Note 12 885 kQ Note 12 35 C 55 kQ 73 KQ 121 KQ 179 kQ 649 KQ Note 12 30 C 40 kQ 53 kQ 88 kQ 135 kQ 481 KQ Note 12 25 C 29 kQ 39 kQ 65 kQ 103 kQ 360 kQ Note 12 20 C 22 kQ 29 kQ 49 kQ 79 kQ 271 KQ Note 12 15 C 16 kQ 22 kQ 36 kQ 61 kQ 206 KQ Note 12 10 C 12 kQ 17 kQ 28 kQ 48 KQ 158 kQ 5 C 9 5 kQ 13 kQ 21 kQ 37 kQ 122 kQ 0 C 7 4 kQ 9 8 kQ 16 kQ 29 kQ 95 kQ Note 12 Resistance values greater than 180 k ohms cannot be measured by the UMDAS TH in the thermistor mode The 180 k ohm resistance limit includes the total resistance across the current excitation Ix pins which is the sum of the thermistor resistance and the lead resistances Note 13 For accurate three wire compensation the individual lead resistances connected to the Ix pins must be of equal value Throughput rate Table 9 Throughput rate specifications Number of Input Channels Maximum Throughput 2 Samples second 2 S s on each channel 4 S s total 2 S s on each channel 6 S s total 2 S s on each channel 8 S s total 2 S s on each chann
Download Pdf Manuals
Related Search