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User`s Manual for LXI Measurement Instruments

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1. Thermocouple Type Input Temp J K T E S R B N 100 C 40 17 C 40 17 C 40 16 C 40 16 C 30 16 C 0 C 30 15 C 30 16 C 40 16 C 30 15 C 30 22C 30 220 0 16 C 100 C 0 18 C 30 15 C 40 16 C 30 15 C 40 18 C 0 18 C 40 15 C 300 C 30 15 C 30 17 C 30 16 C 30 15 C 40 18 C 40 18 C 30 23 C 40 15 C 500 C 30 15 C 30 15 C 40 15 C 30 18 C 30 17 C 30 21 C 40 15 C 700 C 30 15 C 30 15 C 10 16 C 30 18 C 30 18 C 30 17 C 40 16 C 900 C 30 15 C 30 17 C 40 17 C 30 18 C 40 18 C 30 19 C 0 16 C 1100 C 40 15 C 40 16 C 40 19 C 40 18 C 30 18 C 30 16 C 1400 C 40 18 C 30 18 C 30 17 C a Conditions for accuracy measurements Warm up time of 45 minutes Inclusive of typical 0 15 C CJC error maximum CJC error is 0 25 C Inclusive of typical 0 25 uV offset error maximum offset error is 2 5 uV Exclusive of thermocouple errors Exclusive of noise see Figure 34 and Figure 35 for more information about system noise 121 Appendix A 122 The histograms shown in Figure 34 and Figure 35 characterize the Gaussian system noise distribution for each of the available filter types on the DT8871U and
2. Signal Input 0 gt A 24 Bit 0 gt A D Ground y PC Reference 0 DC DC WV Signal Input 1 PC Ground Oo Bi 24 Bit Eo p A D a Ground DC DC Reference 1 Isolation Figure 49 When measuring two input signals with channel to channel isolation three ground references are provided signal 0 signal 1 and PC ground New Application Derived from Isolated Channels A typical application of measuring 48 channels of varying voltages from sensors such as batteries thermocouples RTDs pressure sensors etc often must use different instruments because of the various ranges needed Standard ranges of 10 V may handle some applications but not others to the required resolution and accuracy With isolation per channel combinations of channels can be used to measure higher voltage ranges Figure 50 shows a configuration of 2 separate channels ganged up to measure a signal of up to 20 V Normally each input would measure 10 V But by using two identical channels a range of twice that level can be accommodated The output readings of each A D are then summed to give the very accurate result This is possible because the isolation between channels allows the return of the first channel to float up to a level halfway between the input signal This reflects the accurate impedance balance of each input and the high common mode rejection of each stage 171 Appendix E View Sett
3. Sense Sense i N NM H o H i Figure 11 4 Wire RTD Connection 3 Wire RTD Connections The 3 wire configuration eliminates one wire from the 4 wire RTD connection Lead wire resistance Ri errors in the return wire from Sense may be introduced unless the voltage drop is essentially equal and opposite to the voltage drop across Sense Figure 12 shows a 3 wire RTD connection 52 Wiring Signals RTD Channel Return 425 UA Current Sense Sense Y H HoE M 4 RL i i RL Es RTD R is lead wire resistance Figure 12 3 Wire RTD Connection 2 Wire RTD Connections The 2 wire configuration is the least accurate of the RTD wiring configurations because the lead wire resistance Ry and its variation with temperature contribute significant measurement errors particularly if the lead wire is long If you decide to use the 2 wire connection scheme ensure that you use short lead wire connections For example if the lead resistance is 0 5 2in each wire the lead resistance adds a 1 Qof error to the resistance measurement Using a 100 ORTD Pt100 with a 0 00385 C European curve coefficient the resistance represents an initial error of 1 Q 0 385Q C or 2 6 C Since the lead wire resistance changes with ambient temperature additional errors are also introduced in the measurement Figure
4. aa E Shield Vin Vin Figure 15 Connecting Voltage Inputs to an RTD Channel The input impedance is well over 100 MQ using the voltage Sense and Sense inputs For best accuracy when connecting voltage inputs use twisted pair wires with a dead ended shield connected to pin 4 of the screw terminal block Connecting Voltage Inputs to High Voltage Channels Each DT8873 and DT8874 contains pluggable screw terminals for connecting high voltage inputs Note On the standard DT8874 instrument channels 32 to 47 correspond to the high voltage input channels Figure 16 shows the numbering of the screw terminal blocks for high voltage connections 56 Wiring Signals CD COD XD X5 4 3 2 1 Shield Sense No Sense Connect Figure 16 Screw Terminal Block Numbering for High Voltage Connections Note To make wiring easier use the supplied screwdriver to attach your signals to the screw terminal block When you are finished plug the screw terminal block into the screw terminal header that corresponds to the channel to which you are wiring Figure 17 shows how to connect high voltage inputs to the DT8873 and DT8874 High Voltage Channel Sense Sense N NM 2 H i x c Shield Vin Vin Pin 2 is no connect Figure 17 Connecting Voltage Inputs The input impedance is well over 100 MQ using the voltage Sense and Sen
5. The DT8872 supplies each RTD channel with 425 uA of excitation current to prevent self heating The resistance of the RTD circuit increases gradually repeatably and linearly with temperature As the resistance increases the voltage drop across the RTD also increases The DT8872 reads this voltage drop and automatically converts the voltage to the appropriate temperature based on the RTD type The DT8872 and DT8874 support Pt100 100 Q Platinum Pt500 500 Q Platinum and Pt1000 1000 Q Platinum RTD types using Alpha coefficients of 0 00385 and 0 00392 you can mix and match RTD types across RTD channels Refer to the following web site for more information on RTD types http www omega com To connect an RTD input you can use a 4 wire 3 wire or 2 wire connection scheme described in the following subsections For the best accuracy use 4 wire RTD connections this connection scheme enables Kelvin sensing to minimize errors due to lead wire resistance 51 Chapter 4 4 Wire RTD Connections The 4 wire configuration offers the best accuracy with long connection wires compared to the 3 and 2 wire configurations The 4 wire connection scheme eliminates errors due to lead wire resistance Ry and thermal heating Wire impedance of up to 100 Qanywhere in the hookup is automatically cancelled as long as the sense wires are connected Figure 11 shows a 4 wire RTD connection RTD Channel Return 425 UA Current ES
6. e DT8871U and DT8871 Configurable analog input channels for thermocouple or differential voltage inputs easy access jacks for each channel for quick wiring One CJC cold junction compensation input for each thermocouple channel B E J K N R S and T thermocouple types supported the instrument automatically linearizes the measurements and returns the data as a 32 bit floating point temperature values Input range of 0 075 V for the DT8871U with 0 25 uV RMS A D noise using no software filtering and 1 25 V for the DT8871 with 5 uV RMS A D noise using no software filtering Break detection circuitry to detect open thermocouple inputs e DT8872 Configurable analog input channels for RTDs and differential voltage inputs easy access jacks for each channel for quick wiring 100 Q 500 Q and 1000 Q platinum RTD types supported using alpha curves of 0 00385 European or 0 00392 American 4 wire 3 wire or 2 wire configurations the DT8872 automatically linearizes the measurements and returns the data as 32 bit floating point temperature resistance or voltage values Input range of 1 25 V e One24 bit Delta Sigma A D converter per channel for simultaneous high resolution measurements e 500 V galvanic isolation channel to channel and to the host computer to protect signal integrity Overview Throughput rate of up to 10 Samples s for all channels Software or external digital trigger on digital input line 0
7. 500 400 200 100 4 x 0 2 4 Noise in uV Figure 37 System Noise on the DT8871 Using the Moving Average Filter Specifications RTD Specifications Table 12 lists the specifications for RTD channels on the TEMPpoint and MEASURpoint instruments Table 12 RTD Specifications Feature Specifications RTD types software selectable Platinum 100 Q 500 Q and 1000 Q A D converter resolution 24 bits Sample rate 10 Samples s Supported temperature range 200 to 850 C European standard Current source Absolute current 425 uA 0 5 at 25 C calibrated in firmware Drift 10 ppm C maximum Drift per year x 100 ppm typical Internal reference 411 250 0 002 V Thermal disturbance channel to channel None Supported RTD alpha curves See Table 13 on page 125 Table 13 lists the RTD alpha curves that are supported by RTD channels Table 13 Supported RTD Alpha Curves Alpha Average Temperature Coefficient of Nominal Resistance at Resistance C 0 C Organization Standard 0 00385 100 Q British Standard BS1904 1984 Deutschen Institut DIN 43760 1980 fur Normung 0 00392 98 129 Q Scientific Appartus SAMA Manufacturers of RC 4 1966 America 125 Appendix A Isolation and Protection Specifications Table 14 lists the isolation and protection specifications for the analog input subsystem on the TEMPpoint VOLTpoint
8. For IVI COM programmers you can also assign a VISA alias to the instrument For example rather than addressing the instrument as TCPIP0 192 43 218 69 inst0 INSTR you can a VISA alias such as TEMPpointl instead See your VISA documentation for more information on VISA resource strings and creating VISA aliases 42 Setting Up and Installing the Instrument Determining Ethernet Activity You can use the ENet Link and ENet Activity LEDs on the rear of the instrument shown in Figure 8 with the LAN LED on the front of the instrument shown in Figure 7 to determine the Ethernet activity on your instrument Table 1 describes the meaning of these LEDs x DATA TRANSLATION E ENet Link ENet Activity LED LED Digital In Out AL USB LED not used on this instrument LMT LED OPN LED Figure 8 Rear Panel of the Instrument Table 1 Using LEDs to Determine Ethernet Activity LEDs Color Description LAN LED Solid Green Instrument has valid IP address on front panel Blinking Green Instrument identified using the Web interface see page 72 for more information Red If the Ethernet link is operational the instrument does not have a valid IP address Otherwise the Ethernet link is not operational ENet Link LED Yellow Ethernet link operational on rear panel Off Ethernet link not operational ENet Activity LED Green Network traf
9. 410 66 C 1 2 C 310 33 C 700 C 40 27 C 30 89C 0 27 C 30 68 C 410 63 C 30 92 C 30 33 C 900 C 40 27 C 30 34 C 10 28 C 30 66 C 0 6 C 0 8 C 410 33 C 1100 C 40 28 C 30 34 C 10 64 C 0 58 C 30 71 C 30 34 C 1400 C 40 62 C 30 56 C 30 64 C a Conditions for accuracy measurements Warm up time of 45 minutes Inclusive of typical 0 2 C CJC error maximum CJC error is 0 3 C Inclusive of typical 5 uV offset error maximum offset error is 50 uV Exclusive of thermocouple errors Exclusive of noise see Figure 36 and Figure 37 for more information about system noise The histograms shown in Figure 36 and Figure 37 characterize the Gaussian system noise distribution for each of the available filter types on the DT8871 Note that converting uV error to temperature error depends on thermocouple type For example a K thermocouple changes approximately 39 uV per degrees C therefore a noise level of 10 uV adds 0 3 C error 10 uV 39 uV for a type K thermocouple 123 Appendix A 124 Number of Occurences HISTOGRAM OF SYSTEM NOISE 1200 1000 800 600 400 200 20 10 0 10 20 Noise in uV Figure 36 System Noise on the DT8871 Using No Software Filter Raw Filter Number of Occurences HISTOGRAM OF SYSTEM NOISE 800 700
10. DT8871 0 005 DT8872 and DT8874 RTD channels 0 001 DT8873 and DT8874 high voltage channels 0 001 System gain error includes all noise sources gain 1 DT8871U and DT8874 thermocouple channels 0 00075 of full scale range DT8871 0 00075 of full scale range DT8872 and DT8874 RTD channels 0 00075 of full scale range DT8873 and DT8874 high voltage channels 0 01 of reading System zero error includes all noise sources gain 1 no filter DT8871U and DT8874 thermocouple channels 0 25 uV RMS DT8871 5 uV RMS DT8872 and DT8874 RTD channels 12 UV DT8873 and DT8874 high voltage channels 300 uV for the 10 V input range 2 mV for the 100 V input range 8 mV for the 400 V input range 129 Appendix A 130 Table 18 Voltage Measurement Specifications cont Feature Specifications System drift error zero DT8871U and DT8874 thermocouple channels DT8871 DT8872 and DT8874 RTD channels DT8873 and DT8874 high voltage channels 0 02 uV C typical 0 02 uV C typical 0 10 uV C 0 5 uV C for the 10 V input range 5 uV C for the 100 V input range 20 uV C for the 400 V input range System drift error gain DT8871U and DT8874 thermocouple channels DT8871 DT8872 and DT8874 RTD channels DT8873 and DT8874 high voltage channels 4 ppm C 4 ppm C 10 ppm C 15 ppm C A D reference Drift 8 ppm C maximum Dri
11. ENet HA Link Ethernet LED Embedded ENet Calibration Controller L gt Activity ROM Ea LAN gt LED p Power LED p USB LED The USB and Open TC LEDs are p Limit LED not used on this instrument TOORA p Open TC LED dto IDROM Figure 29 Block Diagram of the DT8873 VOLT point Instrument 97 Chapter 6 98 DT8874 Block Diagram Figure 30 shows the block diagram of the DT8874 MEASURpoint instrument 10f8 10 nA Break 64 kB Digital Input aN ri Detection Isolated SRAM Isolators 5 2 DC DC a3 SE 1of8 lt a 8 F Digital Output X Q s Lp e v x20 pr gt gt Isolators o VV CJC Per T e ep R345 Point ENet Channels 0 to 15 L gt Link 425 yA 5 Ethernet LED T Current Source Isolated S ENS DC DC m Control 4 Embedded L Activity 10 5 FPGA Controller LED x 2 5 Hz Filter 3 20 AN 9 LAN L 24 Bit p LED 3 A D o Sense 5 le __ Power LED 4 07 Return Channels 16 31 L M USBLED p Limit LED Isolated 9 Open TC LED 2 5 Hz Filter Ea 1 O Av 24 Bit 20 Z IM AID gt ID ROM 30 400 Sense 100 4 Return 19 I Gain Select EN The USB LED is not Channels 32 47 airauon LL used on this
12. LAN Configuration Use the Configuration gt LAN web page to configure the Local Area Network LAN settings for the instrument A screen similar to the following appears DATA TRANSLATION MZ ASURpernt LXI DT887x 32 Home Configuration LAN Channel Scan rate Filter Limits Digital Input amp Trigger Digital Output Measurement amp control Channel Digital Input Digital Output File Download Measurements Help Topics Technical Support LAN Configuration tem EA Hostname Description 8 channel TC board with lots of wires DHCP Automatic private IP address enabled Static Static IP Address configuration 192 168 187 163 IP Mask IP address assignment 8 Gateway Primary DNS Secondary DNS Primary SNTP server Secondary SNTP server Password When you first access your instrument the LAN settings that the instrument obtained through DHCP or AutoIP should be sufficient If you need to make changes later click the Modify button to enable changes Note If you want to assign a static IP address ensure that you uncheck the checkbox called Automatic private IP address enabled Verifying the Operation of Your Instrument When you click Modify you must supply a password for the instrument The username is sysadmin it cannot be changed The default password is user You can change the password on this page Note that the new password goes into effect after the instrument reboo
13. The following sections describe how to configure these settings JavaScript To enable JavaScript also referred to as Active Scripting perform the following steps 1 From the Internet Explorer browser select Tools gt Internet Options 2 Click the Security tab 3 Select Internet and then click Custom Level 4 Scroll down to the Scripting section Security Settings 5 Under Active Scripting select Enable and then click OK Security Levels By default the IP address of the instrument is added to the Internet zone If you d rather leave the settings of the Internet zone at a level higher than Medium high then you can add the IP address of the instrument to either the Local intranet or Trusted sites zone and configure the security level of that zone to Medium high or lower The following section describe how to configure each zone Internet Zone To configure the security level of the instrument s IP address in the Internet zone perform the following steps 1 From the Internet Explorer browser select Tools gt Internet Options 2 Click the Security tab 68 Verifying the Operation of Your Instrument 3 4 Internet Options PIR General Securty Privacy Content Connections Programs Advanced Select a Web content zone to specaly Es securty seling e 9 9o Intemet Local intranet Trusted sites py Internet This zone contains all Web sites you havent placed in ot
14. senan e iaae a enn 78 LAN Contiguratiot eee ec ede DR ee re aee deb e bd sre dede e 78 Channel Configurati h cessus ea mega ir de ua ep eov SR eR Mem ew 79 Scan Rate us oet e o te tut et os 80 Filter Configuration il Or eet ed dee n s 81 Alarm Limits Configuration ooooocccocccccoccccror enn 82 Contents Digital Input and Trigger Configuration 0 0 83 Digital Output Configuration isses nn 84 Measuring Data and Controlling the Instrument asasan nsanra eee 85 Starting and Stopping a Scan oooooooooccccoccr enn 85 Controlling the Digital Outputs 6 6 6 ee 87 Reading the Digital Inputs sssseeee e 88 Downloading Measurements o 89 Part 2 Using Your Instrument llllleeeess 91 Chapter 6 Principles of Operation 20000 e cece 93 Block Diarias tia AE A enimse ee 94 DIS871U Block Dipta ae hme G2 ews e eroe eRe piola eie dine ee ua 94 DT8871 Block Diagram lssssssse n 95 DIS8872 Block Diagratri scort teet t Re aee see ated 96 D1T8873 Block Diagram us exte nee petet e oed ta na 97 DT8874 Block Diagram eener aner erea en a e nn 98 Analog Input Features iere e e ee an eR e ea O ede 99 Analog Input Channels iu RR e redegi e ded adn one We 99 Thermocouple Input Channels nas 6 0 100 Cold Junction Compensation s ssas sasssa eee 101 Open Thermocouple Detection 0 6 66 101 RID Channels a Seth teen ER RENS iee
15. e STP37 screw terminal panel The STP37 permits easy screw terminal connections for accessing the digital I O signals of a TEMPpoint VOLTpoint or MEASURpoint instrument e EP333 cable The EP333 is a 2 meter shielded cable with two 37 pin connectors that connects the STP37 screw terminal panel to the digital I O connector of the instrument e Rack mount kits To rack mount a single instrument order a single rack mount kit Data Translation part number 22927 To rack mount two instruments side by side order a dual rack mount kit Data Translation part number 22735 22 Overview Getting Started Procedure The flow diagram shown in Figure 1 illustrates the steps needed to get started using a TEMPpoint VOLTpoint or MEASURpoint instrument This diagram is repeated in each Getting Started chapter the shaded area in the diagram shows you where you are in the getting started procedure Prepare to Use the Instrument see Chapter 2 starting on page 27 Set Up and Install the Instrument see Chapter 3 starting on page 35 Wire Signals see Chapter 4 starting on page 45 Verify the Operation of the Instrument see Chapter 5 starting on page 65 Figure 1 Getting Started Flow Diagram 23 Chapter 1 24 Part 1 Getting Started 2 Preparing to Use the Instrument POENI O OS Ur 29 Checking the System Requirements a d cepa 30 Ingtallng the OMR ns oo lin A ee e edita 31 Mi
16. firmware version and serial number is displayed 4 If you do not have a TEMPpoint VOLTpoint or MEASURpoint instrument connected or if you want to simulate the operation of an instrument click one of the following selections and then go to step 6 Device Simulation Mode MEASURpoint Simulates the operation of a MEASURpoint instrument Device Simulation Mode VOLTpoint Simulates the operation of a VOLTpoint instrument Device Simulation Mode TEMPpoint RTD Simulates the operation of a DT9872 or DT8872 TEMPpoint instrument 141 Appendix C Device Simulation Mode TEMPpoint TC Simulates the operation of a DT9871 DT9871U DT8871 or DT8871U TEMPpoint instrument When selected the button indicator turns green 5 If your instrument is not included in the list of Available instruments but you want to manually connect to it do the following a Click Advanced The following screen is displayed Advanced Enter the VISA Connect and Option Strings in the fields below VISA Connect String TCPIP 192 43 218 49 SOCKET E VISA Option String Sel b Determine the IP address of your instrument on the TCP IP network using an LXI discovery tool such as the Eureka Discovery Utility provided with your instrument see page 72 for information on using this utility c Enter the VISA Connect String for your instrument such as TCPIP 192 43 218 69 INSTR or TCPIP 192 43 218
17. 38 connecting directly to a computer 39 connecting using a hub or switch 38 protection specifications 126 R rack mounting 22 raw filter 107 recommendations for wiring 47 recording data 148 regulatory specifications 133 requirements 30 requirements for web interface 67 associating CSV files 71 Internet Explorer browser settings 67 Java 67 Reset pin 44 resetting the instrument 44 resolution analog input 104 digital I O 111 returning boards to the factory 117 RJ45 connector specifications 135 RMA 117 router using with a site LAN 37 RID alpha curves 125 RID channels data format 108 RID connections 2 wire 53 3 wire 52 4 wire 52 RID connector specifications 134 RTD specifications 125 RTD types 102 S sample clock 105 sample rate 107 scan rate 80 SCPI clients 67 installing 32 programming 21 security levels 68 Internet zone 68 Intranet zone 69 Trusted Site zone 70 SENSOR IS OPEN 102 simultaneous single value analog input 106 site LAN 37 connecting using a hub switch or router 37 connecting without using a hub switch or router 38 software packages 20 software trigger 105 solid state relays 111 controlling 64 sourcing 64 specifications 119 153 basic instrument 120 digital I O 131 environmental 132 Ethernet connector 135 isolation and protection 126 memory 127 physical 132 power 132 regulatory 133 RJ45 connector 135 RID 125 RTD connectors 134 system temperature error 121 123 tempera
18. 44 SOCKET and click Set d If you want to simulate the operation of an instrument enter the string simulate true model xxxxxx in the VISA Option String text box and click Set where xxxxxx is the model number of the instrument you want to simulate D19871 DT8871 DT9872 and DT8872 for TEMPpoint instruments DT9873 and DT8873 for VOLTpoint instruments and DT987x and DT887x for MEASURpoint instruments 6 Optional If you previously used the Measurement Application and you want to overwrite the configuration of the last session which was automatically saved with the default configuration for the selected instrument click the Reset to Default Config button 7 Optional If you previously used the Measurement Application and you want to overwrite the names of the channels which were automatically saved with the default channel names for the selected instrument click the Reset Channel Names button Note that this step is useful especially when changing between instrument types 8 Click Continue The latest state is saved and used when the application is next run and the Channel Overview screen of the Measurement Application is displayed Note that data acquisition is started automatically and temperature values are displayed in degrees C by default 142 Using the Measurement Application a Measurement Channel Overview Channel Type Ch42 Ch43 Ch45 Ch46 Cha Volts 7 70 V 8 10 V 8 30 V 7 90 V 8 00 V 7 60 V 7 60 V 8 1
19. Computer 39 Chapter 3 Applying Power TEMPpoint VOLTpoint and MEASURpoint instruments are shipped with an EP361 5V power supply and cable To apply power to the instrument do the following 1 Connect the 5 V power supply to the power connector on the rear panel of the instrument Refer to Figure 6 Instrument Rear Panel Power Digital I O EAN 5 V In Reset O B EP361 5 V Power Supply A To wall outlet Figure 6 Attaching a 5 V Power Supply to the Instrument 2 Plug the power supply into a wall outlet Note For proper grounding of your measurement instrument ensure that you use the power supply and cable EP361 that is provided with the instrument and that you use all three prongs of the cable when connecting it to your wall outlet 3 Press the Power switch on the rear panel of the instrument shown in Figure 6 to turn on the instrument The Power LED on the front panel lights to indicate that power is on Figure 7 shows the front panel of the instrument including the locations of the LEDs 40 Setting Up and Installing the Instrument Ch40 Ch41 Ch42 Ch43 Ch44 Ch45 Ch46 Ch47 Ch32 Ch33 Ch34 Ch35 Ch36 Ch37 Ch38 Ch39 Ch24 Ch25 Ch26 Ch27 Ch28 Ch29 Ch30 Ch31 Ch16 Ch17 Ch18 Ch19 Ch20 Ch21 Ch22 Ch23 Ch8 Ch9 Ch10 Ch11 Ch12 Ch13 Ch14 Ch15 cho Ch1 Ch2 Ch3 Ch4 C
20. DT9841 Calibration Utility if DT9850 Series Calibration Utility ES Easy CD Ripper 3j Eureka LXI Instrument Discovery Expense Report G FAR tj File Converter App a Path l CAProgram Files Data Translation Instrument c Click OK to add the utility to the list of exceptions d Click OK to exit from the Windows Firewall Configuration menu Launching the Web Interface From the Eureka utility double click the appropriate IP address to open the web pages for your instrument using your default web browser Alternatively you can enter the IP address of your instrument directly in your Internet Explorer address bar to see the instrument s web interface The main web page similar to the following screen shows information about your instrument on the network Verifying the Operation of Your Instrument e Es DATATRANSLATION M ASURpeent LXI DT887x 32 Home Home Configuration Turn ON front panel identification indicator LEER MEC UU Channel Manufacturer Data Translation Inc Scan rate Instrument model DT887x 32 Filter Firmware revision 1 7 0 0 Limits Serial number 0000001 Dice INDIE TOODET Description Modify 8 channel TC board with lots of wires LXI Class c Digital Output LXI version 1 1 Measurement amp control Hostname asellustertius datx com Channel MAC address 00 40 9D 2E 9E 75 Digital Input 5 IP address Modify 192 43 218 71 DHCP Digital Output piii Time source
21. LAN cable EP372 for connecting to the LAN RJ45 connector on the rear panel of the instrument 38 Setting Up and Installing the Instrument Computer Ethernet Hub Switch o a TEMPpoint TEMPpoint TEMPpoint TEMPpoint VOLTpoint or VOLTpoint or VOLTpoint or VOLTpoint or MEASURpoint MEASURpoint MEASURpoint MEASURpoint 5 V Power 5 V Power 5 V Power 5 V Power Supply Supply Supply Supply Figure 4 Typical Private LAN Connections using a Hub or Switch Connecting Directly to a Computer Optionally you can connect the TEMPpoint VOLTpoint or MEASURpoint instrument directly to your computer creating an ad hoc network as shown in Figure 5 Be aware that the time and date settings of the instrument will not be updated using this connection method Therefore this connection scheme is generally recommended for quick set up and verification only Note TEMPpoint VOLTpoint and MEASURpoint instruments do not support the Auto MDIX function therefore use a crossover cable rather than a standard LAN cable to connect your instrument unless your computer has enabled the Auto MDIX function Computer TEMPpoint VOLTpoint or MEASURpoint 5 V Power Standard LAN Cable if PC enabled Auto MDIX Supply or Ethernet Crossover Cable if PC doesn t enable Auto MDIX or you are not sure Figure 5 Typical Private LAN Connections when Connecting Directly to a
22. Modify 192 43 244 18 T Time Zone Modify GMT 5 Current Time Tue Apr 28 1 45 PM 2009 Help a TCPIPO0 asellustertius datx com INSTR Topics Sees EUN TCPIPO0 asellustertius datx com 5025 SOCKET Technical Support If you have multiple instruments connected to the network you can click Turn ON front panel identification indicator to light the LAN LED on the instrument described on page 41 to indicate the device you are using To change the description IP address or time source associated with the instrument click the Modify links to navigate to the LAN Configuration page described on page 78 To change the time zone associated with the instrument click the Modify link The following screen appears Time Zone Save configuration Discard changes GMT w shor 0 minute vw You specify the time zone that is used by the instrument as an offset either or from GMT Greenwich Mean Time The specified hour and minute is added to the UTC Coordinated Universal Time time that is maintained by the instrument For example choosing 5 hours 0 minutes sets the current time zone used by the instrument to five hours and 0 minutes behind GMT 77 Chapter 5 78 Configuring the Instrument Web pages are provided for configuring the following aspects of your instrument Local Area Network LAN settings Channels that you want to measure Scanrate e Filter e Alarm limits Digital I O lines
23. V Resolution Each TEMPpoint VOLTpoint and MEASURpoint instrument provides 8 bits of resolution for the digital input port to accommodate the 8 digital input lines and 8 bits of resolution for the digital output port to accommodate the 8 digital output lines These lines are organized as isolated dedicated ports You cannot configure port resolution through software Operation Modes Using software you can read from a single digital input line or the entire digital input port or write to a single digital output line or the entire digital output port You can also return the value of the entire digital input port in the analog input data stream if you want to correlate analog input data with digital events refer to page 105 for more information 111 Chapter 6 112 General Checklist Technical Support If Your Instrument Needs Factory Service code tercer eene e hem eer Troubleshooting 113 Chapter 7 114 General Checklist Should you experience problems using a TEMPpoint VOLTpoint or MEASURpoint instrument do the following 1 Read all the documentation provided for your product Make sure that you have added any Read This First information to your manual and that you have used this information 2 Check the Instrument OMNI CD for any README files and ensure that you have used the latest installation and configuration information available Check that your system meets the requirements stated in Cha
24. You can then use the VISA methods viLock viUnlock to prevent other clients from accessing the instrument To install Agilent VISA do the following 1 Goto www agilent com enter IO Libraries Suite in the search field and select Agilent IO Libraries Suite 15 0 from the search results 2 Follow the instructions on Agilent s web site to download and install the Agilent IO Libraries which include VISA support VISA COM support and the Agilent Connection Expert tool We recommend that you run Data Translation s Eureka Discovery Utility that is provided with the Measurement software to locate your LXI instrument on the network see page 72 for more information Installing the IVI COM Driver Measurement Application and Eureka Discovery Utility The Measurement Application developed using Measure Foundry provides a quick way to verify that your instrument is working properly To install the Measurement Application Eureka Discovery Utility and all the components necessary to use the Measurement Application with your instrument including the IVI COM driver perform the following steps 1 Insert the Instrument OMNI CD into your CD ROM or DVD drive The installation program should start automatically and the Instrument OMNI installation program should appear 2 If the installation program does not start automatically double click Setup exe from the CD The installation program appears 3 Click Install from Web recommended to
25. ag oc None 15 Enable v v None i 16 Enable E u 17 Enable v v 18 Enable v v 19 Enable v l v v lt gt If the alarm condition occurs the specified digital output line is turned on To set up limit checking do the following 1 Under Limit click the Enable buttons next to the channels for which you want to define limits You can use the Disable All button to quickly stop limit checking on all channels For each channel 2 Enter a value in the Low Limit text box 3 Enter a value in the High Limit text box 4 Optional Select a Digital Output line to set from the drop down list box for this channel This line is set to 1 when the limit range high or low is exceeded When multiple channels are configured to set a digital output line a logical OR condition exists between them and any value out of range sets the line to 1 5 Click Save configuration to apply your changes If you do not save before leaving this page your changes are lost You can also click the Discard changes button before you save to return to the previous configuration if desired 82 Verifying the Operation of Your Instrument Digital Input and Trigger Configuration Use the Configuration gt Digital Input amp Trigger web page to configure the digital input lines of your instrument DATA TRANSLATION ME ASURpe nt LXI DT887x 32 Home Digital Input amp Trigger Configuration LAN Label External trigger Ch
26. and MEASURpoint instruments Table 14 Isolation and Protection Specifications Feature Specifications Overvoltage protection power on off DT8871U DT8871 and DT8874 thermocouple channels 40 V DT8872 and DT8874 RTD channels 40 V DT8873 and DT8874 high voltage channels 500 V ESD protection Arc 8kV Contact AkV Isolation voltage to the host computer 500 V Channel to channel isolation 500 V 126 Specifications Memory Specifications Table 15 lists the memory specifications for the analog input subsystem on TEMPpoint VOLTpoint and MEASURpoint instruments Table 15 Memory Specifications Feature Specifications Data memory onboard 4 MByte For Data logger built in maximum time before old data is overwritten 48 channels 10 Hz 30 minutes 48 channels 1 Hz 5 hours 48 channels 0 1 Hz 50 hours a Assumes limit detection is off for all channels and for thermocouple channels assumes CJC data is not collected If power fails all temperature data in the system is lost The channel input type and filter settings are still available after power on but the channel and digital I O labels and channel limits are lost 127 Appendix A Temperature Stability Specifications Table 16 lists the temperature stability specifications for thermocouple channels on the TEMPpoint and MEASURpoint instruments Table 16 Temperature Stability Specificatio
27. every other digital I O line allows 500 V isolation channel to channel 131 Appendix A Power Physical and Environmental Specifications Table 20 lists the power physical and environmental specifications for the TEMPpoint VOLTpoint and MEASURpoint instruments Table 20 Power Physical and Environmental Specifications Feature Specifications External power requirements 5 V 0 25V 2 A 0 9 mA typical Physical Dimensions of enclosure 88 14 H x 212 85 mm W x 211 43 mm D Weight 1704 g Environmental Operating temperature range 0 C to 55 C Storage temperature range 25 C to 85 C Relative humidity to 95 noncondensing Altitude up to 10 000 feet 132 Specifications Regulatory Specifications Table 21 lists the regulatory specifications for the TEMPpoint VOLTpoint and MEASURpoint instruments Table 21 Regulatory Specifications Feature Specifications Emissions EMI FCC Part 15 EN55022 1994 A1 1995 A2 1997 VCCI AS NZS 3548 Class A Immunity EN61000 6 1 2001 RoHS EU Directive 2002 95 EG Compliant as of July 1st 2006 Aerospace Material Specification Compliant with AMS2750D 133 Appendix A Connector Specifications This section lists the specifications for the following connector types e Thermocouple connectors RTD connectors High voltage connectors e Ethernet connector Thermocouple Connectors Table 22 lis
28. select Tools gt Internet Options Click the Security tab Click Trusted sites and click Sites Enter the IP address of the instrument to the zone note that the address must be prefaced by https and click Add Trusted sites JE You can add and remove Web sites from this zone All Web sites in this zone will use the zone s security settings Add this Web site to the zone https 192 43 218 69 Web sites Require server verification https for all sites in this zone Lo ema Click OK Click Default Level and move the slide bar to select a security level of Medium high or lower Click OK Pop up Blockers To disable pop up blockers perform the following steps 70 a From the Internet Explorer browser select Tools gt Pop up Blocker b Select Turn Off Pop up Blocker Verifying the Operation of Your Instrument Associating CSV Files with Microsoft Excel or Notepad If files with the CSV extension do not have the proper file associations actions set up then clicking Download in the Download Measurements page of the instrument web interface will not present the option of saving the data to a file or loading the data to an application such as Microsoft Excel or Microsoft Notepad that can display it Instead the data will be displayed in the browser To associate a CSV file with Microsoft Excel or Notepad perform the following steps 1 From the Windows Control Panel o
29. signals current loop inputs to high voltage channels 60 current loop inputs to RTD channels 59 current loop inputs to thermocouple channels 58 digital inputs 63 digital outputs 63 recommendations 47 RID inputs 51 thermocouple inputs 49 voltage inputs to high voltage channels 56 voltage inputs to RTD channels 56 voltage inputs to thermocouple channels 55 warm up time 48 Z zones Internet 68 Intranet 69 Trusted Site 70 177 Index 178
30. specifications are based on the Moving Average filter type see page 81 for more information on filter types 119 Appendix A Basic Instrument Specifications Table 8 lists the basic instrument specifications for TEMPpoint VOLTpoint and MEASURpoint instruments Table 8 Basic Instrument Specifications Feature Specifications Number of channels in channel list Up to 48 analog input channels and one digital input port A D converter type 24 bit Sigma Delta 120 Specifications Thermocouple Specifications Table 9 lists the thermocouple specifications for thermocouple channels on the TEMPpoint and MEASURpoint instruments Table 9 Thermocouple Specifications Feature Specifications Thermocouple types software selectable B E J K N R S T A D resolution 24 bits Sample rate 10 Samples s Thermal disturbance channel to channel None Upscale break detection current DT8871U and DT8874 DT8871 10 nA 100 nA System temperature error DT8871U and DT8874 DT8871 See Table 10 on page 121 See Table 11 on page 123 System Temperature Error for the DT8871U and DT8874 Table 10 lists the accuracy of the DT8871U and DT8874 for each thermocouple type at several temperature points over the dynamic range of the instrument Table 10 Calculated Thermocouple Accuracy of the DT8871U and DT8874
31. starts acquisition Auto calibrating front end resets the zero point on each power up in addition the instrument supports anytime calibration performing an auto calibration function on software command Measurement Instrument Calibration Utility allows you to calibrate the instrument in the field see page 21 for more information on this utility 8 opto isolated digital input lines you can read the digital input port through the analog input data stream for correlating analog and digital measurements 8 opto isolated digital output lines the outputs are solid state relays that operate from 30 V at currents up to 400 mA peak AC or DC VOLTpoint Features The key features of VOLTpoint DT8873 instruments are as follows Direct connection of analog input channels for differential voltage inputs removable screw terminal blocks for each channel for quick wiring One 24 bit Delta Sigma A D converter per channel for simultaneous high resolution measurements 500 V galvanic isolation channel to channel and to the host computer to protect signal integrity Software selectable input range of 10 V 100 V or 400 V per channel Throughput rate of up to 10 Samples s for all channels Software or external digital trigger on digital input line 0 starts acquisition Auto calibrating front end resets the zero point on each power up in addition the instrument supports anytime calibration performing an auto calibration function on software
32. tede A ete dep ete de ree eie p Seed leg 31 Installing the IVI COM Driver Measurement Application and Eureka Discovery UUU a ica 31 Installing SCPI Support Software sese 32 Viewing the Documentation enn 34 Chapter 3 Setting Up and Installing the Instrument o 35 Connecting the Instrument to the LAN sssssssssssse ee 37 Connecting to a Site LAN ssssssssssee ene 37 Connecting to a Private LAN 2 0 6 rr 38 Connecting Using a Hub or Switch 00 000 0 38 Connecting Directly to a Computer 000 00000 39 Applying POWEr os eleme e rere a rw x ee rte tr er Rte ec eae t redes 40 Getting an IP Address and Host Name ssssssssseeeeseeee eee 42 Determining Ethernet Activity e een 43 Resetting the Instrument si prenien enie T I nn 44 Contents Chapter 4 Wiring SigNalS o ooococcoonncrn a 45 General Wiring Recommendations isssssssssss een 47 Warm Up lime tee pe er os a 48 Connecting ThermocoupleInputs sssesese ene 49 Connecting RED Inputs esi eDELVV eeu ect eC ree dee Pp da 51 4 Wire RTD Contiectlons ee chopos eR BER bia beatae tonne are bande ADS EAS 52 3 Wire RID Connections un eI LR MIR ene 52 2 Wire RTD Connections o ooooccoocoocoo eh n 53 Connecting Voltage Inputs sissss suas ek ek hk e n d d d s A 55 Connecting Voltage Inputs to Thermocouple ChamnelS oooo oo oocccoom o o 55 Connecting Voltage Inputs
33. the A D is on the sensor side and has its own custom DC DC converter Then optical or transformer isolation is used to transfer the A D output data the sensor data digitally And due to the simultaneous architecture of ISO Channel technology all data is transferred in parallel 165 Appendix E Summary ISO Channel technology offers built in system redundancy to protect your investment if one channel fails the remaining channels are completely unaffected Instruments with ISO Channel technology also adapt to the sensors that they are connected to allowing a different ground reference for each signal without introducing errors For these key reasons ISO Channel technology protects against problems in the field and thereby reduces costs what a great return on your investment 166 About ISO Channel Technology Floating Signal Inputs Offer New Application Advantages Precision measurement systems are often limited in that all inputs are connected to a single ground Typically multiplexer input configurations are set up this way since all signal inputs are connected to the same return Even differential input configurations use the same ground reference The result is that accuracy and flexibility for accurate measurements can be severely compromised when noise or common mode voltage is present see Figure 45 Signal Input 1 2x O Multiplexer AD pc emi Input V PC Ground co
34. the Eureka Discovery Utility recommended select Eureka Discovery Utility e Click Install Selected Features and follow the prompts to install the software f When you are finished with the Instrument OMNI CD click Quit Installer For information on using the Measurement Application to verify the operation of your instrument refer to Chapter 5 starting on page 65 Installing SCPI Support Software If you wish you can develop application programs for TEMPpoint VOLTpoint and MEASURpoint LXI instruments using SCPI Standard Commands for Programmable Instruments To install the SCPI example programs and documentation perform the following steps 1 If you have not already done so perform the following steps a Insert the Instrument OMNI CD into your CD ROM or DVD drive The installation program should start automatically and the installation program should appear b Ifthe installation program does not start automatically double click Setup exe from the CD The installation program appears 32 Preparing to Use the Instrument c Click Install from Web or Install from CD If you are installing from the web click Measurement Instrument SCPI Support and follow the prompts to install the example programs and documentation If you are installing from the Instrument OMNI CD perform these steps Click Install Additional Software b Click Measurement SCPI Support c Click Install Selected Features and follow t
35. this case the OPN LED lights when the open thermocouple is detected and the LMT LED lights when the temperature limit is out of range for the thermocouple type 103 Chapter 6 Out of Range Data for RTD Channels Each RTD type corresponds to an allowable voltage range If a voltage is measured on the input that is outside of the legal range for the selected RTD type the channel may be configured for the wrong type of RTD or something other than an RTD may be connected to the channel For channels configured with a RTD type of voltage the Limit LMT LED on the rear panel of the instrument lights to alert you when the voltage is out of range greater than 1 25 V or less than 1 25 V see page 43 for the location of this LED For channels configured with an RTD type other than voltage the LMT LED lights when the temperature limit is out of range for the specified RTD type In addition if the input voltage is less than the legal voltage range for the selected RTD type the software returns the value TEMP OUT OF RANGE LOW 88888 0 decimal If the input voltage is greater than the legal voltage range for the selected RTD type the software returns the value TEMP OUT OF RANGE HIGH 88888 0 decimal Out of Range Data for High Voltage Channels Each voltage input channel has an allowable voltage range 10 V 100 V or 400 V You configure the input range for each channel using software If a voltage is measured on the input that is
36. to 39 DT8871U 48 and DT8871 48 48 48 thermocouple inputs numbered O to 47 DT8872 8 8 8 RTD inputs numbered O to 7 DT8872 16 16 16 RTD inputs numbered O to 15 DT8872 24 24 24 RTD inputs numbered O to 23 DT8872 32 32 32 RTD inputs numbered O to 31 DT8872 40 40 40 RTD inputs numbered O to 39 DT8872 48 48 48 RTD inputs numbered O to 47 99 Chapter 6 100 Table 3 Number and Type of Analog Input Channels cont Instrument 3t of Analog Input Type Models Channels Channel Types VOLTpoint DT8873 8 8 8 high voltage inputs numbered 0 to 7 DT8873 16 16 16 high voltage inputs numbered 0 to 15 DT8873 24 24 24 high voltage inputs numbered O to 23 DT8873 32 32 32 high voltage inputs numbered O to 31 DT8873 40 40 40 high voltage inputs numbered 0 to 39 DT8873 48 48 48 high voltage inputs numbered O to 47 MEASURpoint DT8874 16T 16R 16V 48 16 thermocouple inputs numbered O to 15 16 RTD inputs numbered 16 to 31 16 high voltage inputs numbered 32 to 47 Thermocouple Input Channels For channels that support thermocouples you can attach a voltage input or any of the following thermocouple types in a mix and match fashion B E J K N R S and or T By default these channels are configured for voltage inputs You can specify the thermocouple types for channels over the LAN using the web interface as described in Channel Configuration on page 79 i
37. to change You can use these controls to activate or deactivate an external device based on criteria other than temperature that you define 87 Chapter 5 Reading the Digital Inputs While the instrument is scanning you can use the Measurement amp control gt Digital Input web page to view the current value of the digital input port A screen similar to the following appears DATATRANSLATION M ASURpe nt LXI a DT887x 32 Digital Input Status Home LAN 0 amp open Chan Scan rate z Ld Open Filter 2 Open Limits 3 a Digital Input amp Trigger Oen Digital Output 4 Sa Open Measurement amp control 5 amp Open Channel Digital Input is Open Digital Output 7 gt Open File Download Measurements Help Topics Technical Support If you configured custom labels for the digital input lines those labels are shown here The Current state LEDs show green if the digital input line is on relay is closed or red if the digital input line is off relay is open 88 Verifying the Operation of Your Instrument Downloading Measurements Note Before using this feature ensure that you have associated CSV files with Microsoft Excel or Notepad described on page 71 or the data will be displayed in the browser and not saved to a file You can use the File gt Download Measurements web page to download your measurement results including timestamp and limit values if applicable to d
38. to the DtxMeasurement IVI COM driver online help for more information If you are using Measure Foundry to program your instrument refer to the Measure Foundry User s Manual and online help for more information If you are using Standard Commands for Programmable Instruments SCPI to program your instrument refer to the SCPI Programmer s Manual for MEASURpoint for more information Intended Audience This document is intended for engineers scientists technicians or others responsible for using and or programming a TEMPpoint VOLTpoint or MEASURpoint instrument It is assumed that you have some familiarity with thermocouples RTDs and or voltages and that you understand your application 11 About this Manual 12 How this Manual is Organized This manual is organized as follows Chapter 1 Overview summarizes the major features of the TEMPpoint VOLTpoint and MEASURpoint instruments as well as the supported software and accessories Chapter 2 Preparing to Use the Instrument describes how to unpack the instrument check the system requirements install the software and view the documentation online Chapter 3 Setting Up and Installing the Instrument describes how to apply power to the instrument and connect the instrument to the network Chapter 4 Wiring Signals describes how to wire signals to the instrument Chapter 5 Verifying the Operation of Your Instrument describes how to verify the
39. your instrument If a timeout message is returned the IP address is incorrect If a no host error message is returned the subnet mask is incorrect Refer to page 42 for more information on IP and subnet addresses If needed reset the instrument using the instructions on page 44 Troubleshooting Table 7 Troubleshooting Problems cont Symptom Possible Cause Possible Solution Instrument The instrument configuration Check your LAN configuration see the instructions on page 78 does not is incorrect respond Check the IP address of the instrument by opening a Command Prompt window Start gt Programs gt Accessories gt Command Prompt and entering the command ipconfig all The IP settings of your instrument are returned Ping the instrument by opening a Command Prompt window Start gt Programs gt Accessories gt Command Prompt and entering the command ping address where address is the IP address of your instrument If a timeout message is returned the IP address is incorrect If a no host error message is returned the subnet mask is incorrect Refer to page 42 for more information on IP and subnet addresses If needed reset the instrument using the instructions on page 44 The instrument is damaged Contact Data Translation for technical support refer to page 116 Intermittent operation Loose connections or vibrations exist Check your wiring and
40. 0 V Ch38 7 50 V 7 60 V 8 40 V 7 50 V 7 60 V 8 40 V 7 90 V 8 10 V Ch24 Ch25 Ch26 Ch27 Ch28 Ch28 Ch30 Ch31 48 00 C 50 03 C 52 02 C 54 02 C 56 02 C 58 01 C 60 03 C 62 02 C Chi Chi Chig Chig Ch20 Ch21 Ch22 Ch23 32 03 C 34 00 C 36 01 C 38 01 C 40 02 C 42 02 C 44 03 C 46 00 C Ch8 Cho Ch10 Chit Chi2 Ch13 Ch14 Ch15 16 01 C 18 02 C 20 02 C 22 03 C 24 03 C 26 03 C 28 00 C 30 02 C Cho Ch2 Ch3 Cha Ch5 Ch6 Ch 0 02 C 2 02 C 4 01 C 6 01 C 8 00 C 10 03 C 12 03 C 14 01 C Figure 39 Channel Overview Screen of the Measurement Application Note that the Channel Type field on the left of the screen indicates the type of sensor that is used for the corresponding row of measurement values For example TC represents the values for thermocouple channels RID represents the values for RTD channels e Volts represents the values for voltage input channels with an input range of 10 V 143 Appendix C Changing the Configuration of Your Instrument To change the configuration of your instrument follow these steps 1 Stop acquisition by clicking the Start Stop button from the main window or by clicking Stop Acquisition from the Acquisition menu 2 Click the Configuration menu and then click Change Configuration The Change Configuration screen is displayed Measurement Change Configuration Acquisition Unit for temperature measurements Filter Type External Trigger Enable Acquisition Frequency A Vi iem 10Hz Sensor Type Log Channe
41. 13 shows a 2 wire RTD connection 53 Chapter 4 54 Return ges RTD Channel Sense Sense Y 425 uA Current 9 me mi 2E RL tf I E RTD ER Figure 13 2 Wire RTD Connection Wiring Signals Connecting Voltage Inputs The way you connect voltage inputs depends on the channel type you are using This section describes how to connect voltage inputs to thermocouple input channels RTD input channels and high voltage input channels Connecting Voltage Inputs to Thermocouple Channels Figure 14 shows how to connect a differential voltage input to a thermocouple input channel on the DT8871U DT8871 or DT8874 instrument Note On the standard DT8874 instrument channels 0 to 15 correspond to the thermocouple input channels Thermocouple Channel Omega Cu Cu Plug SMPW U M Voltage Input Analog Input 0 Analog Input 0 Return Signal Source Figure 14 Connecting Voltage Inputs to a Thermocouple Channel 55 Chapter 4 Connecting Voltage Inputs to RTD Channels Figure 15 shows how to connect a voltage input to an RTD channel on a DT8872 or DT8874 instrument Note On the standard DT8874 instrument channels 16 to 31 correspond to the RTD input channels RTD Channel Sense Sense N NM me H i
42. 49896 lo opics 7476 4 28 2009 15 54 04 high value hi 1810 31 hi 0 355969 lo 7475 4 28 2009 15 54 04 high value hi 1810 32 hi 0 362019 lo 7474 4 28 2009 15 54 03 high value hi 1810 32 hi 0 368049 lo 7473 4 28 2009 15 54 03 ihigh value hi 1810 32 hi 0 374063 lo 7472 4 28 2009 15 54 03 thigh value hi 1810 32 hi 0 380055 lo 7471 4 28 2009 15 54 03 high value hi 1810 32 hi 0 386026 lo 7470 4 28 2009 15 54 03 high value hi 1810 31 hi 0 391974 lo 7469 4 28 2009 15 54 03 high value hi 1810 31 hi 0 39789 lo 7468 4 28 2009 15 54 03 high value hi 1810 32 hi 0 403771 lo Change your Microsoft Excel Microsoft Explorer and Internet Explorer settings to turn off these behaviors and open your files directly in Excel 90 Part 2 Using Your Instrument is TM ARTOIS PER 94 Analog Input Peatittes o causas ras eee ce EAS er RAD AoE A da tea para 99 Digital I O Features ii id RR pb 9 ce bree eased E e Ed ER 110 Chapter 6 Block Diagrams This section includes the block diagrams for the DT8871U DT8871 and DT8872 TEMPpoint instruments DT8873 VOLTpoint instrument and DT8874 MEASURpoint instruments DT8871U Block Diagram Figure 26 shows the block diagram of the DT8871U TEMPpoint instrument 10f8 a isolated Digital Input L S ere
43. 72 instrument the value is in the range of 1 25 V For all other thermocouple types a temperature value in degrees C or one of the error constants described on page 109 is returned In normal operation one floating point value is returned for each enabled channel including the digital input port If you enable the capability of returning CJC data in the data stream described on page 101 two floating point values are returned in the data stream for each enabled analog input channel The first value in the pair represents the temperature or voltage of the channel the second value in the pair represents the CJC temperature in degrees C for that channel Data Format for RTD Channels If you specify an RTD type of None for an RID input channel a voltage measurement is selected and the instrument returns a voltage value in the range of 1 25 V If you specify an RID type of Ohms a resistance value is returned For all other RTD types a temperature value in degrees C or one of the error constants described on page 109 is returned One floating point value is returned for each enabled channel including the digital input port Data Format for High Voltage Channels For high voltage channels a voltage value in the range of 10 V 100 V or 400 V is returned depending on how the channel was configured One floating point value is returned for each enabled channel including the digital input port Error Conditions TEMP
44. A D converter per channel Many channels multiplex into one A D converter Figure 44 Simultaneous vs Multiplexed Architectures Channel to Channel Isolation Besides differential inputs floating channels and a simultaneous architecture ISO Channel technology provides channel to channel isolation not just isolation from the analog front end to the computer ground With this kind of isolation the channels are individually isolated from each other and from other system components Typically instrument manufacturers have used relays isolation amplifiers or optical isolation to provide channel to channel isolation These methods have the following advantages and limitations Relays This technology provides good galvanic separation and can provide good accuracy and thermal properties but relays are slow as they operate on one channel at a time 10 cycles s wear out over time and are sensitive to magnetic fields If one relay sticks staying closed the entire system fails e Isolation amplifiers Isolation amplifiers are used in multiplexed architectures While they are solid state they are expensive not as accurate require more power and generate more noise and heat than other solutions e Optical isolation Optical isolation is good in digital isolation systems but causes accuracy problems in analog isolation systems It is also subject to long term drift and requires considerably more power With ISO Channel technology
45. ANT Write down the IP address and subnet mask that is displayed You will need this information later 5 Select Obtain an IP address automatically and then click OK Internet Protocol TCP IP Properties General Altemate Configuration You can get IP settings assigned automatically if your network supports this capability Otherwise you need to ask your network administrator for the appropriate IP settings Obtain an IP address automatically Use the following IP address Obtain DNS server address automatically Use the following DNS server addresses Preferred DNS serve ervel 6 Select the Alternate Configuration tab and ensure that Automatic private IP address is selected 155 Appendix D Internet Protocol TCP IP Properties General Altemate Configuration If this computer is used on more than one network enter the altemate IP settings below Automatic private IP address User configured 7 Renew the IP address of the computer From the Windows Start menu click Settings gt Network Connections gt Local Area Connection gt Support gt Repair Or if you prefer to do this from the command prompt window click Run from the Windows Start menu enter cmd and click OK to bring up the command prompt window Then from the command prompt window enter ipconfig renew renews the IP address ipconfig all checks the IP address 156 Configuring Networ
46. C NET Agilent VEE Pro LabVIEW LabWindows and others Overview e SCPI commands Use SCPI commands to program TEMPpoint VOLTpoint or MEASURpoint LXI instruments Refer to the SCPI Programmer s Manual for LXI Measurement Instruments for information on the supported SCPI commands and example programs e Measurement Instrument Calibration Utility Users can calibrate a TEMPpoint VOLTpoint or MEASURpoint instrument in the field using precise calibration equipment and the Measurement Instrument Calibration Utility Since each instrument consists of up to 48 individual channels great care must be taken to ensure that proper warm up times are followed and precise calibration equipment is used The calibration utility ships with a comprehensive help file that describes the required equipment and calibration procedure including warm up times for each instrument The calibration utility allows you to revert to the factory calibration for any or all channels or revert back to the last user calibration values if desired In addition this utility generates a report that lists the starting and ending calibration values for each channel allowing traceability Refer to the Data Translation web site ww w datatranslation com for information about selecting the right software package for your needs 21 Chapter 1 Accessories The following optional accessories are available for TEMPpoint VOLTpoint or MEASURpoint instruments
47. DATA TRANSLATION UM 23652 D User s Manual for LXI Measurement Instruments TEMPpoint VOLTpoint and MEASURpoint Fourth Edition May 2010 Data Translation Inc 100 Locke Drive Marlboro MA 01752 1192 508 481 3700 www datatranslation com Fax 508 481 8620 E mail info datx com Copyright O 2009 2010 by Data Translation Inc All rights reserved Information furnished by Data Translation Inc is believed to be accurate and reliable however no responsibility is assumed by Data Translation Inc for its use nor for any infringements of patents or other rights of third parties which may result from its use No license is granted by implication or otherwise under any patent rights of Data Translation Inc Use duplication or disclosure by the United States Government is subject to restrictions as set forth in subparagraph c 1 ii of the Rights in Technical Data and Computer software clause at 48 C F R 252 227 7013 or in subparagraph c 2 of the Commercial Computer Software Registered Rights clause at 48 C F R 52 227 19 as applicable Data Translation Inc 100 Locke Drive Marlboro MA 01752 Data Translation is a registered trademark of Data Translation Inc MEASURpoint TEMPpoint and VOLTpoint Measure Foundry and ISO Channel are trademarks of Data Translation Inc All other brand and product names are trademarks or registered trademarks of their respective companie
48. DT8874 Note that converting LV error to temperature error depends on thermocouple type For example a K thermocouple changes approximately 39 uV per degrees C therefore a noise level of 0 1 uV adds less than 0 003 C error 0 1 uV 39 uV for a type K thermocouple Number of Occurences HISTOGRAM OF SYSTEM NOISE 1000 800 600 400 200 1 0 5 0 0 5 1 Noise in uV Figure 34 System Noise on the DT8871U and DT8874 Using No Software Filter Raw Filter Number of Occurences HISTOGRAM OF SYSTEM NOISE 900 800 700 600 500 400 200 100 0 33 0 17 0 OF 0 33 Noise in uV Figure 35 System Noise on the DT8871U and DT8874 Using the Moving Average Filter Specifications System Temperature Error for the DT8871 Table 11 lists the accuracy of the DT8871 for each thermocouple type at several temperature points over the dynamic range of the instrument Table 11 Calculated Thermocouple Accuracy of the DT8871 Thermocouple Type Input Temperature J K T E S R B N 100 C 40 33 C 30 37 C 40 38 C 30 31 C 30 44 C oc 310 3 C 40 33 C 40 33 C 40 28 C 41 12 C 1 14 C 10 39 C 100 C 40 31 C 30 29 C 30 31 C 30 27 C 410 88 C 30 86 C 40 35 C 300 C 40 29 C 30 34 C 40 29 C 30 26 C 30 75 C 30 71 C 1 84 C 410 33 C 500 C 0 28 C 30 31 C 0 26 C 30 71 C
49. Enable Channel check the boxes next to the channels that you want to collect data You can use the Enable All and Disable All buttons for quick configuration of many channels 2 Under Type select the sensor type for each configured channel from the drop down list boxes If all the channels are of the same type thermocouple RTD or voltage you can use the Set all button to change all channels to the sensor type specified in the heading s drop down list box 3 Describe the channels if desired by entering text in the Label field corresponding to the channel that you want to describe 79 Chapter 5 4 Click Save configuration to apply your changes If you do not save before leaving this page your changes are lost You can also click the Discard changes button before you save to return to the previous configuration if desired Scan Rate Use the Configuration gt Scan Rate web page to set the scan rate for all channels on the instrument A screen similar to the following appears DATATRANSLATION M ASURpeemt LXT DT887x 32 Home Scan Rate Configuration Save configuration l Discard changes LAN Channel 10 000000 Hz Scan rate Filter Minimum 0 000153Hz maximum 10 0000Hz Limits To change your instrument s scan rate do the following 1 Typea value in Hertz between the minimum and maximum shown in the Scan Rate field Note The scan rate that you specify is r
50. O connector on the TEMPpoint VOLTpoint or MEASURpoint instrument A 5 V Instrument Digital I O Connector 1k0 ON pini DIN 0 TTL Outputs 1 jJ pin2 p DIN 1 T A in 20 P DIN 0 ae pin21 D DIN 1 1 KQ pull up to 5 V required for TTL outputs Figure 23 Connecting Digital Inputs Connecting Digital Output Signals The digital output lines of a TEMPpoint VOLTpoint or MEASURpoint instrument act as solid state relays The customer supplied signal can be 30 V at up to 400 mA peak AC or DC You can use the digital output lines of the instrument to control solid state or mechanical relays or high current electric motors Figure 24 shows how to connect digital output signals to line 0 of the instrument to control a motor relay 63 Chapter 4 64 Digital I O Connector Controlled by Software igs A o TUL LE Instrument Motor Relay de e CN 10A Fuse pin 10 Digital Out 0 f p a Hot Neutral D j 120 V AC pin 29 Digital Out 0 or 240 V AC 30V DC 400 mA Output can switch AC or DC Figure 24 Switching up to 30 V at 400 mA Y Verifying the Operation of Your Instrument Betore Using the Web Interface isc a ii eee 67 Locating Your Testrimenton the LAN pi a hd oe td T Connigurnng the Tos IEA cc ene Ee dt e aae E tr e ret obe d 78 Measuring Da
51. ROM instrument Figure 30 Block Diagram of the DT8874 MEASURpoint Instrument Principles of Operation Analog Input Features This section describes the following features of the analog input A D subsystem on TEMPpoint VOLTpoint and MEASURpoint instruments Analog input channels described on this page Input ranges described on page 102 Resolution described on page 104 Calibration described on page 104 Sample clock described on page 105 Trigger source described on page 105 Conversion modes described on page 105 Filtering described on page 107 e Data format described on page 108 e Error conditions described on page 108 Analog Input Channels TEMPpoint VOLTpoint and MEASURpoint instruments provide up to 48 analog input channels The number of channels and the channel types supported thermocouple RTD or voltage input depend on the specific instrument model you purchased as shown in Table 3 Table 3 Number and Type of Analog Input Channels Instrument 3t of Analog Input Type Models Channels Channel Types TEMPpoint DT8871U 8 and DT8871 8 8 8 thermocouple inputs numbered O to 7 DT8871U 16 and DT8871 16 16 16 thermocouple inputs numbered O to 15 DT8871U 24 and DT8871 24 24 24 thermocouple inputs numbered O to 23 DT8871U 32 and DT8871 32 32 32 thermocouple inputs numbered 0 to 31 DT8871U 40 and DT8871 40 40 40 thermocouple inputs numbered O
52. Receive Data 4 EPWR Power from Switch 5 EPWR Power from Switch 6 RXD Receive Data 7 EPWR Power from Switch 8 EPWR Power from Switch Note TEMPpoint VOLTpoint and MEASURpoint instruments do not support Auto MDIX 135 Appendix A 136 Connector Pin Assignments 137 Appendix B 138 Table 26 lists the pin assignments for the 37 pin digital I O connector on TEMPpoint VOLTpoint and MEASURpoint instruments Table 26 Digital O Connector Pin Assignments Pin Description Pin Description 1 Digital Input 0 2 Digital Input 1 20 Digital Input 0 3 Digital Input 2 21 Digital Input 1 4 Digital Input 3 22 Digital Input 2 5 Digital Input 4 23 Digital Input 3 6 Digital Input 5 24 Digital Input 4 7 Digital Input 6 25 Digital Input 5 8 Digital Input 7 26 Digital Input 6 9 Not Connected 27 Digital Input 7 10 Digital Output O 28 Not Connected 11 Digital Output 1 29 Digital Output O 12 Digital Output 2 30 Digital Output 1 13 Digital Output 3 31 Digital Output 2 14 Digital Output 4 32 Digital Output 3 15 Digital Output 5 33 Digital Output 4 16 Digital Output 6 34 Digital Output 5 17 Digital Output 7 35 Digital Output 6 18 Not Connected 36 Digital Output 7 19 Not Connected 37 Not Connected A Using the Measurement Application d cllc AM MONET 140 Running the Measurement Ap
53. Usea chart recorder to display data over time and log it to an hpf file for later analysis Open the last recorded hpf data file in Microsoft Excel View any hpf data file in a file viewer You can customize this application to suit your needs using Measure Foundry Professional with the Instrument Pak the source code for this application is included with the instrument Measure Foundry An evaluation version of this software is available for developing applications for TEMPpoint VOLTpoint or MEASURpoint instruments Measure Foundry is a rapid application development package that provides a system solution for all types of measurement instruments Using Measure Foundry you can develop complex test and measurement applications easily without writing code Simply drag and drop components on a form and configure their property pages to access all elements of your instrument Measure Foundry supports all LXI instrument classes through IVI COM Instruments with interfaces such as GPIB PXI LXI RS 232 and USB are supported through SCPI commands using the VISA transport layer Order the Instrument Pak for Measure Foundry SP1309 CD to build your own application for the instrument DtxMeasurement IVI COM driver This driver provides access to the instrument s functions through a COM server The IVI COM driver works in any development environment that supports COM programming including Measure Foundry MATLAB Visual Basic NET Visual
54. a Pt1000 RTD plus the gain error of the A D and output impedance of the current source over the voltage range 0 005 of the reading For example the maximum error of a Pt100 RTD at 100 C is 0 075 C 20 07 C plus a gain error of 0 005 C 128 Specifications Voltage Measurement Specifications Table 18 lists the voltage measurement specifications for the TEMPpoint VOLTpoint and MEASURpoint instruments Table 18 Voltage Measurement Specifications Feature Specifications Input voltage range no compensation DT8871U and DT8874 thermocouple channels 0 0750 V DT8871 1 2500 V DT8872 and DT8874 RTD channels 1 2500 V DT8873 and DT8874 high voltage channels 10 V 100 V or 400 V A D converter resolution 24 bits Voltage resolution DT8871U and DT8874 thermocouple channels 0 015 uV DT8871 0 3 uV DT8872 and DT8874 RTD channels 0 3 uV DT8873 and DT8874 high voltage channels 1 2 uV for the 10 V input range 12 uV for the 100 V input range 48 uV for the 400 V input range Sample rate 10 Samples s Gain 1 Input impedance DT8871U and DT8874 thermocouple channels 5 MQ typical DT8871 5 MQ typical DT8872 and DT8874 RTD channels gt 100 MQ DT8873 and DT8874 high voltage channels gt 1 MQ Power ON or OFF Input common mode voltage 500 V Common mode rejection 60 Hz and 50 Hz gt 150 dB Coupling DC System linearity DT8871U and DT8874 thermocouple channels 0 005
55. allowable voltage range If a voltage is measured on the input that is outside of the legal range for the selected thermocouple type the channel may be configured for the wrong type of thermocouple or something other than a thermocouple may be connected to the channel For channels configured with a thermocouple type of None voltage the Limit LMT LED on the rear panel of the instrument lights to alert you when the voltage is out of range see Figure 8 on page 43 for the location of this LED For channels configured with a thermocouple type other than None voltage the LMT LED lights when the temperature limit is out of range for the specified thermocouple type In addition if the input voltage is less than the legal voltage range for the selected thermocouple type the software returns the value TEMP OUT OF RANGE LOW 88888 decimal If the input voltage is greater than the legal voltage range for the selected thermocouple type the software returns the value TEMP OUT OF RANGE HIGH 88888 decimal Note If you are continuously measuring from a properly configured thermocouple input channel and the thermocouple opens or becomes disconnected the open thermocouple pull up circuit causes the input voltage to rise to approximately 0 7 V over a few seconds In this case the temperature value rises very quickly and you will receive the TEMP OUT OF RANGE HIGH 88888 decimal value followed by the OPEN SENSOR 99999 decimal value In
56. anadian Department of Communications Le pr sent appareil num rique n met pas de bruits radio lectriques d passant les limites applicables aux appareils num riques de la class A prescrites dans le R glement sur le brouillage radio lectrique dict par le Minist re des Communications du Canada Table of Contents About this Manual ooococooccncnoco hh n nnn 11 Intended Audience cedere bebe Ee he PER EI E ERE e i eet 11 How this Manual is Organized sssssss eh 12 Conventions Used in this Manual 0 0 eee cette een RA 12 Related Information 1e ELLA E eee e ie Lee Fa en wie teat 13 Where o Get Help ia eee etes saut sa Geta cede da Eh Ub ebrei 13 Chapter 1 Overview o oooocccccn RR hh 3 n nnn 15 Hardware Features eee eee eerte Ea reb gp neh e p e i A 16 TEMPpo tnt Features vecors ELIO a ert ERU wb ac ER Ue 16 VOLTpoint Featutes ves da PT DA da dee v er E Aet rea ees Ra 17 MEASURpoint Features s veo eco E SQ e EE Rea 18 Supported Software used Hee Eutr Ee d bet thee ti dese niger te oar eats 20 ACCESO LOS P MM 22 Getting Started Procedure iess Tecson eene 23 Part 1 Getting Started cios ein iaa E ea 25 Chapter 2 Preparing to Use the Instrument 0000 e eee eee oo 27 Unpacking csset I er rece e e a RD e tete tare ade tree tetas 29 Checking the System Requirements sssssssssss eh 30 Installing theSoftware sess nn 31 Prerequisite SoftWare oos eec
57. annel oo 0 External Trigger Enable Scan rate Filter 1 Limits Digital Input amp Trigger Digital Output Measurement amp control 4 Channel Digital Input Digital Output 6 File 7 Download Measurements To change your digital input configuration do the following 1 Describe the digital input lines if desired by entering text in the Label field corresponding to the digital input line that you want to describe 2 To enable use of an external digital trigger on digital input line 0 click the Enable checkbox under the External trigger heading 3 Click Save configuration to apply your changes If you do not save before leaving this page your changes are lost You can also click the Discard changes button before you save to return to the previous configuration if desired 83 Chapter 5 Digital Output Configuration Use the Configuration gt Digital Out web page to configure the digital output lines of your instrument To change your digital output configuration do the following 1 You can also click the Discard changes button before you save to return to the previous DATA TRANSLATION M ASURpe nt DT887x 32 Home Configuration LAN Channel Scan rate Filter Limits Digital Input amp Trigger Digital Output Measurement amp control Channel gital Input Digital Output Download Measurements Help Topics Technical Support configurat
58. annels 0 to 15 correspond to the thermocouple input channels 58 Wiring Signals Thermocouple Channel Ch se 1 Oseries resistor Circuit _ 80V Use a 1 Q series resistor to convert current to voltage For thermocouple channels on the DT8871U and DT8874 1 Q 0 075 A 0 075 V For thermocouple channels on the DT8871 1 Q 1 25 A 1 25 V Figure 18 Connecting Current Loop Inputs to Thermocouple Channels Connecting Current Loop Inputs to RTD Channels RID channels on the DT8872 and DT8874 instruments have an input range of 1 25 V Therefore you can use a 1 Oshunt resistor to measure 1 25 A Similarly you can use a 0 1 Q shunt resistor to measure 12 5 A or a 10 Q shunt resistor to measure 0 125 A Figure 19 shows how to wire your signals to measure a current loop In this example the input is referenced to 80 V Note On the standard DT8874 instrument channels 16 to 31 correspond to the RTD input channels 59 Chapter 4 RTD Channel Sense Sense m4 EE mM XT ES Shield eMe 1 Q shunt resistor Circuit 80V Use a 1 Q shunt resistor to convert current to voltage 1 Q 1 25 A 1 25 V Figure 19 Connecting Current Loop Inputs to RTD Channels Connecting Current Loop Inputs to High Voltage Channels High voltage channels on the DT8873 and DT8874 instrumen
59. anslation com for the name and telephone number of your nearest distributor 104 Principles of Operation In addition each instrument auto calibrates on each power up cycle to guarantee high accuracy measurements This process also known as auto zeroing resets the zero point of each A D You can also auto calibrate the instrument at any time as long as acquisition is not in progress using a software command Refer to your software documentation for more information on the auto calibration feature Sample Clock Source TEMPpoint VOLTpoint and MEASURpoint instruments support an internal clock with a maximum sampling rate of 10 Samples s Use software to specify an internal clock source and a clock frequency between 0 000152590219 Hz and 10 0 Hz Note The clock frequency that you specify is rounded to the closest correct value that the instrument can accept without error Internally the 10 Hz clock is divided by an integer in the range of 1 to 65535 the internal clock divider to determine the closest value Using software you can query this setting to determine the actual clock frequency that is used When the continuous operation is started all the channels specified in the channel list are read simultaneously at the specified clock frequency Trigger Source A trigger is an event that occurs based on a specified set of conditions Acquisition starts when the instrument detects the initial trigger event and stops w
60. ation 111 isolation specifications 126 IVI COM driver 20 installing 31 J Java 67 L LAN configuration 78 connecting to a private LAN 38 connecting to a site LAN 37 LED 43 launching the web interface 76 LEDs ENet Activity 43 ENet Link 43 LAN 43 LMT 43 103 104 OPN 43 101 103 Power 40 USB 43 limit configuration 82 lines digital I O 110 111 LMT LED 43 103 104 logging data to disk 148 M Measure Foundry 20 Measurement Application 20 configuring 144 defining alarm limits 146 exiting 152 features 140 installing 31 logging data to disk 148 opening a data file in Excel 149 reading the digital input lines 151 running 141 updating the digital output lines 147 using the Chart Recorder 148 viewing a data file 150 Measurement Instrument Calibration Utility 21 mechanical relays controlling 64 memory specifications 127 Microsoft Excel 71 Microsoft Notepad 71 moving average filter 107 N network settings 153 NI VISA 31 Notepad 71 O open thermocouple detection 101 operation modes continuous analog input scan mode 106 digital I O 111 simultaneous single value analog input 106 OPN LED 43 101 103 opto isolators 110 out of range data high voltage channels 104 RID channels 104 thermocouple channels 103 P password 79 physical specifications 132 pinging the instrument 114 115 pop up blockers 70 power applying 40 specifications 132 175 Index 176 prerequisite software 31 private LAN
61. bration 36 Setting Up and Installing the Instrument Connecting the Instrument to the LAN This section describes how to connect your instrument to the LAN Local Area Network Two connection schemes are shown Site LAN connections described on this page Private LAN connections described on page 38 Note It is recommended that you consult with your network administrator to ensure that all network security performance and reliability issues are considered when using connecting instruments to the LAN Connecting to a Site LAN A site LAN is useful in applications that require access by many users or access by users at distributed sites In this connection scheme a DHCP Dynamic Host Configuration Protocol server is used to assign an IP address to the instrument Figure 2 shows a typical site LAN connections using a dedicated Ethernet hub switch or router Figure 3 shows typical site LAN connections without using a dedicated Ethernet hub switch or router Note Use standard LAN cables for network connections TEMPpoint VOLTpoint and MEASURpoint instruments ship with a standard LAN cable EP372 for connecting to the LAN RJ45 connector on the rear panel of the instrument Computer Ethernet Hub Switch Router IG SHE LAN jum 0 E7 0 LI o D TEMPpoint TEMPpoint TEMPpoint TEMPpoint VOLT point or VOLT point or VOLT point or VOLTpoint
62. ccoc eee cence nee eens 135 Appendix B Connector Pin Assignments eleeeseeeeesee 137 Appendix C Using the Measurement Application 139 Ovetview cce A E ERE FEHLER Eee 140 Running the Measurement Application lsssssssss eh 141 Changing the Configuration of Your Instrument ooooococcocncronoonnnnrrroocso 144 Defining Alarm Limits sede EIFE ERE IER de eere tee ee ree haec 146 EogeingData to Disk eee teretes afe trn wae 148 Viewing a Data Bile soci censeo neige A ea Dn c ge e nie tede Dh E 150 Reading Digital Input Values sse en 151 Exiting from the Measurement Application 0 0 0 152 Contents Appendix D Configuring Network Settings on Your PC 153 Configuring the PC to Use Auto IP 0 0 eee eh 154 Specifying a Static IP Address for your Instrument o ooooooccccocccccnc eee eee 157 Reconfiguring the PC to Use a Static IP Address 0 0 0000 e eee eee 158 Appendix E About ISO Channel Technology seseseeesse 159 ISO Channel Technology soos ie eed m rm hebt eb Rr EA 160 Why ISO Channel Technology is Your Best Return on Investment o o 161 Understanding Ground Loops ssssseee e 161 ISO Channel Eliminates Ground Loops and Increases Common Mode Rejection 162 Floating Differential Signals sisse 163 Simultaneous Architecture 000 c ee 164 Channel t
63. channels in the same position as the physical connectors If you configured custom labels for some of the channels those labels are shown here rather than the channel numbers Red boxes indicate that the value is out of range for the specified sensor type The values are updated only for the channels that you enabled and at the scan rate you configured Press the Stop scan button to stop acquiring data from the sensors Verifying the Operation of Your Instrument Controlling the Digital Outputs Use the Measurement amp control gt Digital Output web page to view the current state of the digital output lines and manually change them if desired A screen similar to the following appears DATA TRANSLATION MEASURpeent LXI SEE Digital Output Status and Control ome d 0 amp Closed Open Channel Scan rate E e Closed coss cal digital Input Trigger 3 9 Open digital Output 4 a Open t amp trol easuremen contro 5 amp Open 6 e Open 7 gt Open echnical Support Green indicates that the digital output line relay is closed red indicates that the digital output line relay is open Note You cannot change the configuration of digital output lines that were configured for limit checking on the Configuration gt Limits page To change the status of a digital output line relay click the Open Close toggle buttons under the Change State heading for the digital output lines that you want
64. command Measurement Instrument Calibration Utility allows you to calibrate the instrument in the field see page 21 for more information on this utility 8 opto isolated digital input lines you can read the digital input port through the analog input data stream for correlating analog and digital measurements 8 opto isolated digital output lines the outputs are solid state relays that operate from x30 V at currents up to 400 mA peak AC or DC 17 Chapter 1 MEASURpoint Features The standard MEASURpoint DT8874 instrument provides 16 thermocouple channels 16 RTD channels and 16 high voltage channels The key features of MEASURpoint DT8874 instruments are as follows e Analog Input Channels 0 to 15 Configurable channels for thermocouple or differential voltage inputs easy access jacks for each channel for quick wiring One CJC cold junction compensation input for each thermocouple channel B E J K N R S and T thermocouple types supported the instrument automatically linearizes the measurements and returns the data as a 32 bit floating point temperature values Input range of 0 075 V with 0 25 uV RMS A D noise using no software filtering Break detection circuitry to detect open thermocouple inputs e Analog Input Channels 16 to 31 Configurable analog input channels for RTDs and differential voltage inputs easy access jacks for each channel for quick wiring 100 Q 500 Q and 1000 Q plati
65. cuon DC DC Isolators D ce c 10f8 d gt a 8 o Ay 24 Bit gt Digital Output X X20 gt AD zp Isolators gt O AA a Control A gt FPGA Point D 1 ENet 1 of up to 48 Channels Ly Link gt Ethernet LED Embedded ENet Controller H gt Activity Calibration LED ROM E LAN gt LED p Power LED gt USB LED Ll Limit LED The USB LED is not used on this instrument gt Open TC LED ID ROM Figure 26 Block Diagram of the DT8871U TEMPpoint Instrument 94 Principles of Operation DT8871 Block Diagram Figure 27 shows the block diagram of the DT8871 instrument PA 10f8 100 nA Break 64 kB Digital Input pAs 3 Detection Isolated o SRAM Isolators ae DC DC E ad E sE S Ki otr Tum g Po ouat F p o AN T AID 9 Control A gt FPGA CJC Per 8 y bel lt gt RJ45 Point ra ENet 1 of up to 48 Channels FP Link Ethernet LED gt Embedded ENet Controller Activit Calibration gt VE y ROM gt LAN LED Hp Power LED The USB LED is not used on this instrument USB LED 3 Limit LED m Open TC LED MA ID ROM Figure 27 Block Diagram of the DT8871 TEMPpoint Instrument 95 Chapter 6 96 DT8872 Block Diagram Figure 28 shows the block diagram o
66. d to it This value is returned anytime a voltage greater than 100 mV is measure on the input since this value is greater than any legitimate thermocouple voltage If the channel is configured for a voltage input not a thermocouple type the Open OPN LED never lights and the SENSOR IS OPEN value is not returned Instead the voltage value is returned If no input is connected to the channel the software returns a value of approximately 0 7 V due to the open thermocouple detection pull up circuit RTD Channels For channels that support RTDs you can attach a voltage input or any of the following RTD types in a mix and match fashion Platinum 100 Q Pt100 Platinum 500 Q Pt500 or Platinum 1000 Q Pt1000 RTD using an European alpha curve of 0 00385 or an American alpha curve of 0 00392 The supported temperature measurement range for these RTD types is 200 C 328 F to 850 C 1562 F You can also measure a resistance value between 0 and 4k Ohms if desired Refer to page 102 for information on the supported input range for voltage measurements By default all channels are configured for voltage inputs You can specify the RTD types for channels over the LAN using the web interface as described in Channel Configuration on page 79 in software using the Change Configuration dialog in the supplied Measurement Application or by using an API call in your application program You can also use standard SCPI commands over VISA if d
67. ding from the table of contents on the left side of the document Within the document click the text shown in blue to jump to the appropriate reference the pointer changes from a hand to an index finger To go back to the page from which the jump was made click the right mouse button and Go Back or from the main menu click Document and then Go Back To increase or decrease the size of the displayed document from the main menu click View and then Zoom By default Adobe Reader smooths text and monochrome images sometimes resulting in blurry images If you wish you can turn smoothing off by clicking File and then Preferences General and unchecking Smooth Text and Images Setting Up and Installing the Instrument Connecting the Instrument to the LAN iciioeessuse ete e teer 37 Getting an IP Address and Host Name issssssssssseeeseee eee 42 Determining Ethernet AcM te et e eet dents 43 Kosenie De RUE ec ic core e Herb A EH eem x et ee pr eed 44 Chapter 3 Prepare to Use the Instrument see Chapter 2 starting on page 27 Set Up and Install the Instrument this chapter Wire Signals see Chapter 4 starting on page 45 Verify the Operation of the Instrument see Chapter 5 starting on page 65 Note Your TEMPpoint VOLTpoint and MEASURpoint instruments are factory calibrated Thereafter yearly recalibration is recommended Refer to page 104 for more information on cali
68. e NUR VERRE AER 102 Input Ranges avia ae vea EG Su ad retta use a e 102 Out of Range Data for Thermocouple Channels sssssss 103 Out of Range Data for RTD Channels ssseesseeeeeeee 104 Out of Range Data for High Voltage Channels o ooooooooooccccomm o 104 AO i eee atcp Rede etit EN Re eot er tate E 104 Calibration eere ree dreiies ee se eret aiu ee A aae ULM EUER 104 sample Clock Source rei E c ER GE As 105 Trigger DOUTCE dads SE Ede genes Ree een do a ERR ULM b n 105 Conversion Modes uer OU at ARCH ERREUR NOUO e Te Ro a qt eae ig beh 105 Simultaneous Single Value Operations ooooococcccrocccnnrrorac 106 Continuous Scar Mode erro beate resist CR SAL 106 Specifying Analog Input Channels oooocoooccccococcoooccnncroro oo 106 How Continuous Scan Works 0 0 0c cece eens 107 luli sot Lp 107 Data Format ut RR RECRUIT RR BUR e eot est ense tar 108 Data Format for Thermocouple Channels 000 0 000000008 108 Data Format for RTD Channels 00 0 cece eee eee een eee 108 Data Format for High Voltage Channels 6 0 6 cece cence 108 Error Conditions VERRE A A Mae CRI RARE ee 108 Contents Digital I O Features opere ou e beate tut ete t ete data EM eds 110 Digital Input Lines cet eee edente es ee uel e ete ci aea es 110 Digital Output Lines cerrocrsco dessi n eae ee py pp eph a ERR 111 Channel to Channel Isolation 0 0 ccc cece eec
69. e channels that you want to log to disk when you use the Chart Recorder described on page 148 The first time you use the Measurement Application all channels are selected for data logging Under External Trigger Enable select True if you want to start acquisition using an external trigger signal connected to digital input line 0 otherwise select False Under Channel Names specify a meaningful name to represent each channel Under Acquisition Frequency click the frequency 10 Hz 5 Hz 2 Hz Every 2 s Every 5 s Every 10 s Every Minute Every 2 Minutes Every 5 Minutes at which to simultaneously sample all channels When you are finished configuring the Measurement Application click OK To save the configuration settings click the Configuration menu and then click Save Configuration File Enter a name for the configuration file select the directory in which to save the file and then click Save This file has the extension Measurement Note You can save numerous configuration settings if desired To load a previously saved configuration click the Configuration menu and then click Load Configuration File Restart acquisition by clicking Start Acquisition from the Acquisition menu or by clicking Start Stop from the main window 145 Appendix C Defining Alarm Limits When you start the Measurement Application for the first time the following alarm limits are defined for each channel e Minimum alarm
70. easurement Application To run the Measurement Application perform the following steps 1 Click Start gt Programs gt Data Translation Inc gt Measurement gt Measurement Application The Device Selection screen is displayed Device Selection Please select a Measurement instrument from the dropdown list below or one of the Device Simulation modes Next click Continue to start measuring Available Measurement Instruments Reset Channel Names TCPIP 192 43 218 81 SOCKET v i ES Reset to Default Config State Idle Model DT8873 48 Powered by Firmware Version 1 6 0 2 measure S N 8261035 Click for more information I Device Simulation Mode MEASURpoint E Device Simulation Mode VOLTpoint E Device Simulation Mode TEMPpoint RTD Continue Device Simulation Mode TEMPpoint TC Advanced 2 By default the application discovers all TEMPpoint VOLTpoint and MEASURpoint instruments that are available and displays them in the list of Available Instruments If you want to refresh this list to determine if other TEMPpoint VOLTpoint or MEASURpoint instruments are available click Refresh list 3 If your instrument is included in the list of Available Instruments and you want to connect to it select the connect string for the instrument that you want to use from the list of Available Instruments and then go to step 6 Information about the instrument including the scanning status model number
71. ee Figure 48 With this individual isolation per channel each input channel can now float to its own ground reference Separate channels are then effectively isolated from each other by the isolation barrier up to 500 V for each channel Now any noise or common mode voltage to that level is eliminated from the system measurement allowing pristine results from each sensor without any interaction from any other sensor 169 Appendix E Signal Input 1 500V Isolation uv Signal Input n Channel Ground for Sic utn Figure 48 An A D per channel and a DC to DC converter for each A D provides channel to channel isolation where each signal can float to its own ground reference Input channel return references are effectively separate instruments when the inputs are isolated This individual isolation now allows the ground reference of each channel to measure at the level of this common mode voltage up to 500 V This capability allows some new application ideas to flourish Measurement of two signals as shown in Figure 49 can now have essentially 3 separate ground references each signal input signal 0 and signal 1 has a separate return reference additionally the PC has a third ground reference This scheme can be extended for many signal inputs such as 48 inputs in a single small measurement box for a total of 49 different ground references 170 About ISO Channel Technology
72. een resolution of 1024 x 768 or higher 256 MB of RAM 512 MB or more recommended 50 MB of hard disk space Ethernet port CD ROM drive Administrator privileges for software installation For access to the instrument web interface Java Version 6 Update 5 or greater Internet Explorer 6 0 or 7 0 web browser Refer to page 67 for more information on installing Java and configuring your browser settings Acrobat Reader 5 0 or later for viewing documentation Once you have verified that your system meets the system requirements install the software as described in the next section Preparing to Use the Instrument Installing the Software This section describes how to install the software you need to use your TEMPpoint VOLTpoint or MEASURpoint instrument Prerequisite Software No prerequisite software is required if you are using a single client to access a TEMPpoint VOLTpoint or MEASURpoint instrument on the LXI bus or if you are managing how multiple clients concurrently access the instrument on the LXI bus In these case your application can use sockets to communicate with the instrument If however you want multiple clients to access your instrument on the LXI bus and you want to lock access to the instrument so that one client cannot change the configuration of the instrument that another client is accessing you need to install VISA we recommend either Agilent VISA or NI VISA from National Instruments
73. em are at the same potential However these ground potentials can differ by hundreds of millivolts If the difference in ground potential is large enough current flows between the signal and your measurement system this is called a ground loop see Figure 40 Ground loops contribute noise that can greatly affect the accuracy of your measurements especially when you are trying to measure low level signals precisely Ground loop problems are the most common source of error in all measurements Eliminating these errors therefore is critical when taking high accuracy measurements When a ground loop exists the measured voltage Vout is the sum of the signal voltage Vsource and the ground potential difference Vcm which exists between the signal source ground and the measurement system ground These errors often appear as transients or periodic Grounded Ground referenced signals in the Signal Source Measurement System measurement For example if a ground da loop is formed with 50 Hz or 60 Hz AC power Measurement lines the unwanted AC System Ground signal appears as a periodic voltage error in the measurement Figure 40 Measurement System with a Ground Loop 161 Appendix E ISO Channel Eliminates Ground Loops and Increases Common Mode Rejection ISO Channel technology eliminates ground loop problems by using a differential isolated floating front end As you can see in Figure 41 a floating voltage signal i
74. ent Chart Recorder Time Axis Length Channel Visibility mo n1 a2 a3 Y All Visible All Invisible f Single Band Multiple Bands L lt JL lt J LJe 3 00 00 00 00 01 00 00 02 00 00 03 00 00 04 00 00 05 00 00 06 00 00 07 00 00 08 00 00 09 00 00 Open Last Recording in Excel X t s Start Recording 4 Under Channel Visibility select the channels that you want to be visible on the display Note The first time that you run the Measurement Application all the channels are visible 5 From the Time Axis Length drop down list select the time 10 Seconds 1 Minute 5 Minutes 10 Minutes 30 Minutes 1 Hour 2 Hours 4 Hours to use for the time axis 6 If you want to display all the data on a single band leave the Single Band Multiple Band button untouched the button indicator is green If you want to display the data for each channel on a separate band click the Single Band Multiple Band button so that the button indicator turns gray 148 Using the Measurement Application 7 To begin recording data click the Start Recording button You are prompted to name the file in which to store the recorded data The data file has an hpf extension 8 Enter a name for the data file and then click Save The data for each channel is then displayed on the screen and logged to disk Ea Measurement Chart Recorder Time Axis Length 10 seconds w Channel Visibility LEE amp eH
75. esired Note In a mix and match system it is easy to accidentally mismatch the software and hardware configuration for a channel Therefore it is recommended that you pay particular attention when configuring channels since the resultant errors may be not large enough to notice initially but may be significantly larger than the accuracy specification for the instrument Since each channel has its own 24 bit A D analog inputs are measured simultaneously Refer to page 105 for more information on specifying the channels for a scan Input Ranges The input voltage range that is supported by your TEMPpoint VOLTpoint or MEASURpoint instrument depends on the specific instrument model that you purchased as shown in Table 5 Principles of Operation Table 5 Supported Input Ranges Instrument Type Models Input Range TEMPpoint DT8871U 0 75 V for all channels DT8871 1 25 V for all channels DT8872 1 25 V for all channels VOLTpoint DT8873 10 V 100 V or x400 V software selectable for each channel MEASURpoint DT8874 16T 16R 16V 0 75 V for channels O to 15 1 25 V for channels 15 to 31 10 V 100 V or 400 V for channels 32 to 47 software selectable for each channel a Older versions of this instrument had fixed input ranges of 10 V 100 V or 400 V depending on the model purchased Out of Range Data for Thermocouple Channels Each thermocouple type corresponds to an
76. ewine tha Documentation coss a diesen a a ee 34 27 Chapter 2 28 N Prepare to Use the Instrument this chapter Set Up and Install the Instrument see Chapter 3 starting on page 35 Wire Signals see Chapter 4 starting on page 45 Verify the Operation of the Instrument see Chapter 5 starting on page 65 Preparing to Use the Instrument Unpacking Open the shipping box and verify that the following items are present TEMPpoint VOLTpoint or MEASURpoint instrument EP372 Ethernet cable EP361 5V power supply and cable Instrument OMNI CD ROM For D18872 DT8874 and DT8874 instruments a bag of pluggable screw terminable blocks and a screwdriver If an item is missing or damaged contact Data Translation If you are in the United States call the Customer Service Department at 508 481 3700 ext 1323 An application engineer will guide you through the appropriate steps for replacing missing or damaged items If you are located outside the United States call your local distributor listed on Data Translation s web site www datatranslation com Once you have unpacked your instrument check the system requirements as described in the next section 29 Chapter 2 30 Checking the System Requirements For reliable operation the computer that accesses your instrument requires the following configuration PC with Pentium III 500 MHz or higher processor Scr
77. f the DT8872 TEMPpoint instrument sake 1 of 8 Digital Input x 7 425 uA x SRAM d co Isolated o Isolators os t i Current Source DC DC E a E 10 m Ec 1of8 gt A Q lt g 2 5 Hz Filter S Digital Output 5 o 20 AA S Isolators EE 24 Bit gt AID oa Control 30 gt FPGA EE 7 Sense A S ol e wo 4 I Return 4 ENet 1 of up to 48 Channels gt ten Ethernet Embedded ENet troll ivi Calibration Controller Ed riy ROM gt L LAN gt LED p Power LED p USB LED The USB and Open TC LEDs are not gt Limit LED used on this instrument Open TC LED ID ROM Figure 28 Block Diagram of the DT8872 TEMPpoint Instrument Principles of Operation DT8873 Block Diagram Figure 29 shows the block diagram of the DT8873 VOLTpoint instrument 10f8 Isolated 64 kB Digital Input d 2 5 Hz Filter DC DC 9 SHAM Isolators CE 1 B o 24 Bit 1 of 8 amp 5 Bi c A 20 1MQ AID gt 9 gt Digital Output H S 2 30 AA 400 Isolators Sense 100 a Control 10 FPGA 4 Return 1 gt Gain Select S le Lp RJ45 1 of up to 48 Channels
78. fference in potential is called common mode voltage The measurement instrument cannot discern between the signal and the common mode voltage believing that the sum of these voltages is the actual signal Of course the common mode potential is simply an error ISO Channel technology provides common mode rejection of 150 dB which contributes an almost imperceptible error 33 5 million to 1 to Vout Compare this to traditional data acquisition measurement instruments which typically provide only 80 dB of common mode rejection and therefore contribute much more error on the order of 1 part per 10 000 Simultaneous Architecture Many measurement instruments on the market today provide multiplexed architectures where one A D is used to measure multiple channels In this kind of architecture if one channel goes down all channels go down ISO Channel technology on the other hand uses a simultaneous architecture where each channel has its own dedicated 24 bit Delta Sigma A D as shown in Figure 44 About ISO Channel Technology Instrumentation oa bik S5 Amplifier AID Ch 0 o st AID os gt gt E gt VA E 5 L4 I o Mux AID a Converter gt e gt x S H 5 c a bi Ss AID Ch 47 o 24bit st AID 2 d Sample 2 Select and Hold Data Stream Simultaneous Architecture Conventional Multiplexed Architecture One
79. fic detected on rear panel Off No network traffic detected 43 Chapter 3 Resetting the Instrument If needed you can restore the default configuration of your instrument by pressing the Reset pin on the rear panel of the instrument shown in Figure 8 on page 43 until the LAN LED on the front panel turns off which takes approximately 5 seconds and then releasing the Reset pin The instrument reboots automatically using the factory default LAN configuration DHCP and auto IP enabled this process typically takes up to 40 seconds to complete This forces the instrument to re acquire an IP address from the DHCP server or if that fails to use Auto IP to get an IP address Note The default configuration overwrites any changes that you have made to the LAN configuration IP address and password using the instrument s web interface The calibration parameters are not affected by the reset Y Wiring Signals General Wirmg Recommendations nic eeeeh eee ree E ce me Xe eda 47 Mite Ts 22 oasis O RA E 48 Connecting Thermocouple Inputs cose e eee be Ee ex Rd 49 conecte RID Mps seo Deeper oH er Pb Dee m Cb ot SAL e ND de e PL ee eg dece ts 51 Connect Vollage OPUS criar dera 55 iLonnecbpc6 unent Loop Dues soos x UE or ERE pre kd ER 58 Connecetnp Digital O male sese oe spese Ee No ve Hee herd eee tbe ebd ced 62 45 Chapter 4 46 di Prepare to Use the Instrument NL see Chapter 2 starti
80. filter setting is if you are using fast responding thermocouples sampling them at higher speeds gt 1 Hz and need as much response speed as possible e Moving average The default filter setting Provides a compromise of filter functionality and response time This filter can be used in any application This low pass filter takes the previous 16 samples adds them together and divides by 16 81 Chapter 5 Alarm Limits Configuration Use the Configuration gt Limits web page to define alarm conditions for specific enabled channels that you want to measure A screen similar to the following appears DATATRANSLATION MEASURpent LXI cx m a Limit Configuration Configuration Save configuration I Discard changes Help LAN ds Channel EU Low Limit High Limit Digital Output Channel Scan rate Filter 0 iv Enable 1 v Enable 20 n 30 fo Li ij 2 v Enable 5 v 8 v v Measurement amp control IS Enable v E lv lone Channel 4 Enable v v Digital Input Digital Output 5 Enable v v AE 6 Enable v v Download Measurements Help 7 Enable v v Topics 8 Enable oc oc None Technical Support 9 Enable SE c None v 10 Enable o c None v 11 Enable c c None v 12 Enable e E None v 13 Enable C C None v 14 Enable
81. ft per year 100 ppm typical Full scale long term stability DT8871U and DT8874 thermocouple channels 100 ppm year typical DT8871 100 ppm year typical DT8872 and DT8874 RTD channels 0 05 C per year O 0 C x0 27 C per year Q full scale temperature DT8873 and DT8874 high voltage channels 100 ppm year typical Warm up time for the DT8873 and DT8874 high voltage channels 1 hour a You configure the input range for each channel using software Specifications Digital I O Specifications Table 19 lists the specifications for the digital input DIN and digital output DOUT subsystems on the TEMPpoint VOLTpoint and MEASURpoint instruments Table 19 Digital I O Specifications Feature Specifications Number of digital I O lines 16 8 In 8 Out Number of ports 2 8 bit 1 In 1 Out Inputs Input type High input voltage Low input voltage High input current Low input current DC 3 to 28 V lt 1 5V 2 2 kQ resistor to 1 2 V 2 2 kQ resistor to 1 2 V Termination Series 2 2 kQ Outputs Output type Solid state relay Output driver CMOS High output 30V Low output 0 4 V 400 mA Breakdown voltage 60V Contact impedance 10 Isolation voltage To computer ground 500 V Channel to channel 250 V a Determined by the pin spacing in the 37 pin digital connector For greater channel to channel isolation use every other digital I O line using
82. get the latest version of the software from the web or Install from CD to install the software from the CD 31 Chapter 2 4 If you are installing from the web perform these steps a Click Measurement Instrument Software and follow the prompts to install the software including the Measurement Application and IVI COM driver and related documentation b Ifyou wish to install the evaluation version of Measure Foundry click Measure Foundry Evaluation from the MEASURpoint Installation web site and follow the prompts to install the software and related documentation Note To use Measure Foundry with TEMPpoint VOLTpoint or MEASURpoint instruments select the evaluation version of Measure Foundry Pro Instruments Pak c Ifyou wish to install the Eureka Discovery Utility recommended click Eureka Discovery Utility from the Measurement Installation web site and follow the prompts to install the software and help file 5 If you are installing from the Instrument OMNI CD perform these steps a Click Install Measurement Software b Ensure that Measurement Software amp Application is selected c Ifyou wish to install the evaluation version of Measure Foundry in addition to the Measurement application also select Measure Foundry EVAL Note To use Measure Foundry with TEMPpoint VOLTpoint and MEASURpoint instruments select the evaluation version of Measure Foundry Pro Instruments Pak d If you wish to install
83. gt 2 S fl Single Band Muttiple Bands lt lt JL lt gt JC 15 41 42 15 41 43 15 41 44 15 41 45 15 41 Open Last Recording in Excel X tis 1 0 C 2 1 C Stop Recording 9 When you have finished recording click the Stop Recording button 10 If you want to view this data in Microsoft Excel click the button called Open Last Recording in Excel Note The Chart Recorder has other features such as scrolling autoscaling printing and so on Refer to the online help provided with the Measurement Application for more information on these features 149 Appendix C Viewing a Data File To view the data that you recorded in an hpf file with the Chart Recorder perform the following steps 1 Click the Load Data File button from the main window or from the File menu select Load Data File You are prompted to select the name of the data file to view 2 Select the name of the data file to view and then click Open The data file is displayed in the File Viewer window 3 You can then scroll through the data change the scale of the display print the data and so on Refer to the online help provided with the Measurement Application for more information about these features 4 When you are finished viewing the data file click Close 150 Using the Measurement Application Reading Digital Input Values To read the state of the digital input port perfor
84. h5 Ch6 Ch7 Power Q que MIU Power LED LAN LED Figure 7 Front Panel of the Instrument 41 Chapter 3 Getting an IP Address and Host Name Once your instrument is connected to the LAN and powered on the instrument automatically requests an Ethernet address from a DHCP Dynamic Host Configuration Protocol server if available and a host name from a DNS Dynamic Domain Name Service server if available If these services are not available on the LAN the instrument uses Auto IP to set up its TCP IP configuration In this case the IP address is in the range of 169 254 0 0 to 169 254 255 255 with a subnet mask of 255 255 0 0 Note If no DHCP server exists and your PC is set up to use a static IP address you must temporarily reconfigure your PC to use Auto IP then configure your instrument to use a static IP address as described in Appendix D starting on page 153 You can use the instrument s web interface described in Chapter 5 starting on page 65 to see the IP address and host name that is assigned to your instrument Notes When programming a TEMPpoint VOLTpoint or MEASURpoint instrument you access the instrument through its address string which consists of an IP address or host name such as TCPIP0 192 43 218 69 inst0 INSTR or TCPIP0 192 43 218 69 SOCKET If a host name was returned by the DNS server you can also address the instrument using its host name such as TCPIPO0 arrakis datx com inst0 INSTR
85. he prompts to install the example programs and documentation d When you are finished with the Instrument OMNI CD click Quit Installer 33 Chapter 2 34 Viewing the Documentation Note To view the documentation you must have Adobe Reader 5 0 or greater installed on your system Adobe Reader is provided on the Instrument OMNI CD If you install Adobe Reader from this CD make sure that you open Adobe Reader and accept the license agreement before viewing the documentation You can access the documentation for your instrument from the Windows Start menu as follows For documentation about the TEMPpoint VOLTpoint or MEASURpoint instrument click Programs gt Data Translation Inc gt Hardware Documentation gt Measurement User s Manual for LXI Instruments For documentation on the DtxMeasurement IVI COM driver click Programs gt IVI gt DtxMeasurement gt Documentation For documentation on the Eureka Discovery Utility click Programs Data Translation Inc gt Instrument Support gt Eureka LXI Instrument Discovery For documentation about SCPI support click Programs Data Translation Inc gt Measurement SCPI Support gt SCPI Programmer s Manual for Measurement For documentation about Measure Foundry click Programs gt Data Translation Inc gt Measure Foundry 5 1 The following may be helpful when using Adobe Reader To navigate to a specific section of the document click a hea
86. he web interface of your instrument you must determine its IP address on your TCP IP network Note Discovery works only for devices on the same subnet We recommend that you run Data Translation s Eureka Discovery Utility that is provided with the instrument to locate your instrument on the network quickly Alternatively you can use other LXI discovery tools such as Agilent Connection Expert if you have them installed on your computer Or you can check your router s address assignments or locate the instrument s MAC Ethernet hardware address in your DHCP server log Running the Eureka Discovery Utility To use the Eureka Discovery Utility from the Windows Start menu click Programs gt Data Translation Inc gt Instrument Support gt Eureka LXI Instrument Discovery A screen similar to the one shown in Figure 25 appears Eureka lletourneauxp datx com 192 43 218 18 Data Translation DT887x 32 1 DATA TRANSLATION p www datatranslation com Help Figure 25 Eureka LXI Discovery Utility If you are having trouble seeing your instrument in this list check your Windows firewall settings using the information in the next section otherwise skip this section and continue with Launching the Web Interface on page 76 72 Verifying the Operation of Your Instrument Configuring Windows Firewall Settings If you are having trouble seeing your instrument using the Eureka Discovery Utility check your Windows f
87. hen you stop the operation TEMPpoint VOLTpoint and MEASURpoint instruments support the following trigger sources for starting analog input operations e Software trigger A software trigger event occurs when you start the analog input operation the computer issues a write to the instrument to begin conversions External digital trigger An external digital trigger event occurs when the instrument detects a voltage from 3 V to 28 V DC on digital input line 0 Initially the external signal must be low and then go high for at least 100 ms to be detected as a trigger Once triggered the state of digital input 0 is ignored Conversion Modes TEMPpoint VOLTpoint and MEASURpoint instruments support simultaneous single value and continuous scan conversion modes for reading input measurements This section describes each of these conversion modes 105 Chapter 6 Simultaneous Single Value Operations If you want a snapshot of all the analog input channels at one point in time you can perform a simultaneous single value operation also called a single values operation using SCPI commands Note This operation mode is supported in SCPI only it is not supported by the IVI COM driver or the instrument s web interface Use one of the MEA Sure SCPI commands to specify the channels that you want to sample and the configuration of the channels if needed One single value is then acquired from each analog input channel simu
88. her zones Security level for this zone Move the slider to set the security level for this zone Safe browsing and still functional Prompts before downloading potentially unsafe content Unsigned ActiveX controls will not be downloaded Appropriate for most Intemet sites Select Internet click Default Level and move the slide bar to select a security level of Medium high or lower Click OK Local Intranet Zone To add the instrument s IP address to the Local intranet zone and configure its security level do the following g Ro M H From the Internet Explorer browser select Tools gt Internet Options Click the Security tab Click Local intranet and click Sites Select which web sites to add to the zone and then click Advanced Enter the IP address of the instrument to the zone and click Add Local intranet PX You can add and remove Web sites from this zone All Web sites in this zone will use the zone s security settings Add this Web site to the zone Web sites Require server verification https for all sites in this zone o ce 69 Chapter 5 Click OK Click Default Level and move the slide bar to select a security level of Medium high or lower Click OK Trusted Sites Zone To add the instrument s IP address to the Trusted sites zone and configure its security level do the following 1 2 3 4 From the Internet Explorer browser
89. hone number of your nearest distributor All return shipments to Data Translation must be marked with the correct RMA number to ensure proper processing 2 Using the original packing materials if available package the instrument as follows Wrap the instrument in an electrically conductive plastic material Handle with ground protection A static discharge can destroy components on the instrument Place in a secure shipping container 3 Return the instrument to the following address making sure the RMA number is visible on the outside of the box Customer Service Dept Data Translation Inc 100 Locke Drive Marlboro MA 01752 1192 117 Chapter 7 118 m Specifications Basie Instrument Dpecifi Cabos ssec ues eene ee ne n ene Rer e e netu oet 120 Thermocouple Specilicatlons eese DGeRRRRRCR C IG Hen Pee ete e eos 121 NBA A Riad hee A pae e 125 Isolation and Protection Specificalons ceste eee ets bee eere ES 126 h ente der uiii 9 127 Temperature Stability Specifications cete Rr mI bRRR ERE er 128 Voltage Measurement Specifications iiiiisse oer eoe re ee eter 129 Peral TOPICO oi ATHY ad LE RENS DRA dla E er ela dee ets 131 Digital I ISS ca OASIS A 131 Power Physical and Environmental Specifications sasun e eee eee 132 Regulatory SpeciHcatlans ci i400 eb bee nene t ben bated de Een ede techie ee 133 Cannector Specie DOS ee du eR t er A RI e e Res 134 Note All analog input
90. ings Help ave Compile andrin C New Form EE Connecting 10V ISO Channels in Series to Create 20V Range CEREBROS DOS Ch24 10V Range Ch25 10V Ensbled Cha Total Voltage Ch24 Ch25 20 com x SS Channel Typo of selected channels vus Enter an offsetior the selected Project C ProgramData Measure Foundry TemoVMtem Version 01 047 Foffom Work eese Je pem Es lolas Connecting 10V ISO Channels in Series to Create 20V Range Ch24 10V Range Ch25 10V Range Total Voltage Ch24 Ch25 20V Range Start Stop Figure 50 Because each floating signal input is isolated from each other you can use two separate channels normally each configured for 10V to measure a 20V signal Simply sum the result of each channel to get your result Summary When you need the highest accuracy and the most flexibility from your measurement system ensure that floating signal inputs are provided This approach allows noise free measurements in tough industrial settings It also saves countless days of tracking down erroneous readings that inevitably result if these precautions are not taken from the project s beginning 172 A accessories 22 accuracy specifications thermocouple 121 123 Active Scripting 68 activity Ethernet LED 43 address string 42 Agilent VISA 31 alarm limit configuration 82 alias VISA 42 alpha curves 125 ana
91. input lines Digital inputs operate from 3 to 28 V DC with a switching time of 2 ms maximum Figure 32 shows the digital input circuitry a 2 2 kQ resistor is used in series with the LED in the opto isolator input 2 2K Digital Input 7 1 of 8 Opto Isolators Figure 32 Digital Input Circuitry A digital line is high switch is closed if its value is 1 a digital line is low switch is open if its value is 0 110 Principles of Operation Digital Output Lines TEMPpoint VOLTpoint and MEASURpoint instruments feature eight latched and isolated digital output lines The outputs are solid state relays that operate at 30 V and 400 mA peak AC or DC Switching time is 2 ms maximum Figure 33 shows the digital output circuitry 1 of 8 Solid State Relays Figure 33 Digital Output Circuitry Digital outputs resemble a switch the switch is closed if the state of the digital output line is 1 and the switch is open if the state of the digital output line is 0 On power up or reset the digital outputs are disabled Channel to Channel Isolation Each TEMPpoint VOLTpoint and MEASURpoint instrument includes channel to channel isolation of up to 250 V between digital I O lines If you require greater channel to channel isolation use every other digital line This reduces the number of digital I O lines but provides channel to channel isolation of 500 V one channel can be 250 V while the adjacent channel can be 250
92. ion if desired 84 Digital Output Configuration ENTES 0 Relay 0 1 Relay 1 x L Describe the digital output lines if desired by entering text in the Label field corresponding to the digital output line that you want to describe Click Save configuration to apply your changes If you do not save before leaving this page your changes are lost Verifying the Operation of Your Instrument Measuring Data and Controlling the Instrument Use the Control web pages start or stop data acquisition on the sensor channels or to update the value of the digital output line Starting and Stopping a Scan To start or stop a scan use the Measurement amp control gt Channel web page DATA TRANSLATION MEASURpernt LXI DT887x 32 Scan Control Home Press the Start scan button to begin acquiring data from the sensors The measurements are displayed on the screen 85 Chapter 5 86 DATATRANSLATION ME ASURpeent LXI DT887x 32 Scan Control Home LAN Channel Channel scan measurements Input amp Trigger tput Measurement amp control Channel Digital Input Digital Output File Download Measurements Help Topics Technical Support Notice the following aspects of the display When acquiring data the Start scan button changes to say Stop scan and the currently configured scan rate is displayed Each box on the Meter tab represents one of the analog input
93. ircumstances your data may be displayed in a frame in the browser or Excel may open the data in the frame an example follows DATA TRANSLATION MZ ASURp ent LXI DT887x 32 B1 XV amp 10 0 Hz Home ESPA A AAA AAA A AA E Configuration RTDO RTDO Resistance Resistance Furnace Furnace um Scans Date Time chan0 chan0 chan chan 1 chan2 chan2 Channel C limit ohm limit V limit Scan rate 7491 4 28 2009 15 54 06 high value hi 1810 31 hi 0 260711 lo Filter 7490 4 28 2009 15 54 06 high value hi 1810 31 hi 0 267423 lo to 7489 4 28 2009 15 54 05 thigh value hi 1810 31 hi 0 274077 lo E 7488 4 28 2009 15 54 05 jhigh value hi 1810 31 hi 0 280672 lo Digital Input amp Trigger 7487 4 28 2009 15 54 05 high value hi 1810 31 hi 0 287209 lo Digital Output 7486 4 28 2009 15 54 05 high value hi 1810 32 hi 0 293686 lo Maaxiranant amp conical 7485 4 28 2009 15 54 05 lt high value hi 1810 32 hi 0 300115 lo eed 7484 4 28 2009 15 54 05 high value hi 1810 32 hi 0 30649 lo 7483 4 28 2009 15 54 05 high value hi 1810 32 hi 0 312813 lo a Wis 7482 4 28 2009 15 54 04 thigh value hi 1810 31 hi 0 319089 lo Digital Output 7481 4 28 2009 15 54 04 thigh value hi 1810 31 hi 0 325323 lo File 7480 4 28 2009 15 54 04 high value hi 1810 31 hi 0 331514 lo DCUM m 7479 4 28 2009 15 54 04 high value hi 1810 31 hi 0 337672 lo ce 7478 4 28 2009 15 54 04 high value hi 1810 31 hi 0 343796 lo 7477 4 28 2009 15 54 04 high value hi 1810 31 hi 0 3
94. irewall settings by doing the following 1 Right click in the tile bar of the Eureka Discovery Utility The following menu options appear Eureka lletourneauxp datx com 192 X Close Alt F4 Firewall Configuration About Eureka 2 Click the Firewall Configuration option The following window appears 73 Chapter 5 Windows Firewall ES Windows Firewall is helping to protect your PC Windows Firewall helps protect your computer by preventing unauthorized users from gaining access to your computer through the Intemet or a network Y On recommended This setting blocks all outside sources from connecting to this computer with the exception of those selected on the Exceptions tab C Dont allow exceptions Select this when you connect to public networks in less secure locations such as airports You will not be notified when Windows Firewall blocks programs Selections on the Exceptions tab will be ignored Y Off not recommended Avoid using this setting Tuming off Windows Firewall may make this computer more vulnerable to viruses and intruders Windows Firewall is using your domain settings What else should know about Windows Firewall 3 From the General tab select the On recommended setting for proper operation of the Eureka Discovery Utility 4 Click the Exceptions tab and ensure that Eureka LXI Instrument Discovery is included in the list of exceptions 74 Ve
95. isk A screen similar to the following appears DATATRANSLATION M ASURpeent LXI DT887x 32 Download measurements Home Configuration Channel Scan rate Filter Limits Digital Input amp Trigger Digital Output Measurement amp control Channel Digital Input Digital Output File Download Measurements Technical Support Measurements taken by the instrument are stored in a large circular buffer when the buffer is full the oldest data is overwritten with the most recent data To download your data do the following 1 Click the Download button on this page If scanning has been stopped all the data in the buffer is downloaded to a comma separated CSV file starting with the most recent data Most Recent Data Circular Buffer Y Beginning of Buffer End of Buffer 89 Chapter 5 If scanning is in progress a snapshot of the data from the most recent data at the time that the Download button was clicked to the oldest data in the buffer is downloaded to a comma separated CSV file Most T Data Circular Buffer mE x Data Beginning of Buffer End 1 Buffer 2 In the resulting dialog box choose Open or Save If you choose Open the CSV file opens in the associated application Microsoft Excel or Notepad Ifyou choose Save you can open the CSV file in Microsoft Excel Notepad or other utilities for analysis at a later time Under some c
96. k Settings on Your PC Specifying a Static IP Address for your Instrument To specify a static IP address for your TEMPpoint VOLTpoint or MEASURpoint instrument use the LAN Configuration page of the web interface as follows 1 From the LAN Configuration page click Modify 2 Specify the username as sysadmin and specify the password the default password is user You can change the password if you desire pa Uncheck the checkbox called Automatic private IP address enabled Click Static an P Specify a static IP address for the instrument so that is will be on the same subnet as your PC DATATRANSLATI ON MP pent LXI Home LAN Configuration Configuration Save configuration J Discard changes Help LAN ORE e EN Channel Hostname prasz2 Scan rate Filter Description This TEMPpoint box is located in the SQA lab Limits O puce Digital In Automatic private IP address enabled Digital Out 9 static Control _ Static IP Address configuration Sc 10 472 IP can IP address assignment Digital Output 2552552550 Mask Measurements 192 168 187 218 Gateway Channel Primary DNS Digital Input Secondary DNS File A Primary SNTP server 192 43 244 18 Secondary SNTP server 132 163 4 101 opics Password user Technical Support MAC address 00 40 9D 43 35 97 Note You need a Simple Network Time Protocol SNTP time server on the LAN otherwise you need to provide a gateway See
97. l panel and EP333 cable with your TEMPpoint VOLTpoint or MEASURpoint instrument Connect the STP37 to the digital I O connector of the instrument as shown in Figure 21 Instrument Back Panel EP333 Cable Assembly Digital 1 O Connector J1 STP37 Figure 21 Connecting the Instrument to the STP37 Figure 22 shows the layout of the STP37 screw terminal panel and lists the assignments of each screw terminal Digital Input 1 2 TB1 36 Digital Output 7 Digital Input 1 21 17 Digital Output 7 Digital Input 2 3 1 20 18 19 37 35 Digital Output 6 Digital Input 2 22 Tpo d 333 TB3 16 Digital Output 6 Digital Input 3 4 3 2 28 3 34 Digital Output 5 Digital Input 3 23 SESE 15 Digital Output 5 Digital Input 4 5 gg 8 8 33 Digital Output 4 Digital Input 4 24 8 2 22 14 Digital Output 4 Digital Input 5 6 32 Digital Output 3 Digital Input 5 25 13 Digital Output 3 Digital Input 6 7 31 Digital Output 2 Digital Input 6 26 TB4 TBS 12 Digital Output 2 Digital Input 7 8 30 Digital Output 1 Digital Input 7 27 11 Digital Output 1 Not Connected 9 29 Digital Output 0 Not Connected 28 10 Digital Output 0 Figure 22 STP37 Screw Terminal Panel 62 Wiring Signals Connecting Digital Input Signals Figure 23 shows how to connect digital input signals lines 0 and 1 in this case to the digital I
98. limit 0 Maximum alarm limit 100 If the acquired value for a channel is between the defined minimum and maximum alarm limits the value is within range and is displayed in black If the acquired value for a channel is below the minimum or above the maximum alarm limit the value is out of range and is displayed in red To change the alarm limits do the following 1 From the Windows menu select Limit Definition A screen similar to the following is displayed Limit Definition Min Max 4t Max Cho Max Ch8 Max Cho Max Chi Set Set Ga Ga Set ee Be de EE Be we de Be de 88 Be oe de Be de 88 dE EE EE EE EE EE EE EE de Be de 88 Be E da EE EE EE EE EE Max Max Open Digital Output Definition Window 1 2 If you want to change the minimum alarm limit for a channel enter a value in the Min field for that channel and then click Set next to the value that you entered 3 If you want to change the maximum alarm limit for a channel enter a value in the Max field for that channel and then click Set next to the value that you entered 4 If you want to set a digital output line when the alarm limits for a channel are exceeded click the Open Digital O
99. log input 99 basic instrument specifications 120 calibration 104 channels 99 CJC circuit 101 configuration 79 conversion modes 105 data format for high voltage channels 108 data format for RTD channels 108 data format for thermocouple channels 108 differential configuration 49 51 error conditions 108 filtering 107 input ranges 102 open thermocouple detection 101 out of range data 103 104 resolution 104 RTD specifications 125 RTD types 102 sample clock 105 thermocouple specifications 121 thermocouple types 100 trigger source 105 wiring current loop inputs to high voltage channels 60 wiring current loop inputs to RTD channels 59 wiring current loop inputs to thermocouple channels 58 wiring RTD inputs 51 wiring thermocouple inputs 49 wiring voltage inputs to high voltage channels 56 wiring voltage inputs to RTD channels 56 wiring voltage inputs to thermocouple channels 55 application wiring current loop inputs to high voltage channels 60 Index current loop inputs to RTD channels 59 current loop inputs to thermocouple channels 58 digital inputs 63 digital outputs 63 RID inputs 51 thermocouple inputs 49 voltage inputs to high voltage channels 56 voltage inputs to RTD channels 56 voltage inputs to thermocouple channels 55 applying power 40 associating CSV files 71 attaching the module to the computer 37 Auto IP 38 42 154 B block diagrams 94 DT8871 95 DT8871U 94 DT8872 96 DT8873 97 DT8874 98 C cables 37 cross
100. ls to Disk Channel Names 5Hz 0 A if Ch TC O D Ch TC 0 ae Type J De if Ch TC 1 1 1 Type K A if Ch TC 2 Ch TC 1 Every 2 Seconds 2 2 i if Ch TC 3 ChTC2 Every 5 Seconds Type B Nj if Ch TC 4 3 3 Every 10 Seconds Ch TC 3 TypeN y Mf Ch TC 5 i very Mi 4 i chTC6 A H 3n ch TC 4 Y i v if Ch TC 7 ie 5 Every 2 Minutes w ChTC 5 T 2 ry 5 Minutes Set all to Type J v Select All DeselectAl g A 3 Under Unit select the temperature units in which to display temperature data C Celsius F Fahrenheit or K Kelvin 4 Under Sensor Type select the input type for each of the channels For channels that support programmable voltage ranges the following drop down box is displayed select the voltage range that you want to uses for the channel Sensor Type 0 A 4 10 Volts vi 10 Volts 100 Volts 400 Volts Note If you want to set all the channels to the same configuration at once select the configuration to apply using the Set all to combo box If you select a voltage sensor type for a channel the data is displayed in voltage The sensor type setting is ignored for the digital input port 144 Using the Measurement Application 10 11 12 13 Under Filter Type select Moving Average if you want to filter the data or Raw if you do not want to filter the data Under Log Channels to Disk check th
101. ltaneously and returned If you need to continuously acquire data from one or more channels use continuous scan mode described next instead Continuous Scan Mode Continuous scan mode takes full advantage of the capabilities of the TEMPpoint VOLTpoint and MEASURpoint instruments Use continuous scan mode if you want to accurately control the period between successive simultaneous conversions of specific channels In addition to the analog input channels this conversion mode allows you to read the digital input port all 8 digital input lines as part of the analog input data stream This feature is particularly useful when you want to correlate the timing of analog and digital events Specifying Analog Input Channels Using software enable the analog input channels that you want to sample by specifying the channel numbers in the channel list You can also read the value of the digital input port through the analog input data stream by specifying the digital input channel in the channel list the number of the digital input channel depends on how many channels the TEMPpoint VOLTpoint or MEASURpoint instrument provides as shown in Table 6 Table 6 Supported Channels for Continuous Operations Total Number of Channel for Reading Analog Input Channels the Digital Input Port 0to 7 8 0 to 15 16 0 to 23 24 0 to 31 32 0 to 39 40 0 to 47 48 106 Principles of Operation The channels are read i
102. m the following steps 1 Click the Digital In button from the main window or from the Windows menu select Digital Input Panel A screen similar to the following appears Digital Input Panel In7 In6 Ins In4 In3 In2 In1 Decimal Value 0 Note The LED indicator turns green when a value of 1 is detected on the digital input line and turns gray when a value of 0 is detected on the digital input line 151 Appendix C Exiting from the Measurement Application When you finished using the Measurement Application exit from the application by selecting the File menu and clicking Quit 152 z Configuring Network Settings on Your PC Configuring the PC to Use Aute oo Re eS eee ss 154 Specifying a Static IP Address for your Instrument 000 e eee eee 157 158 Reconfiguring the PC to Use a Static IP Address ssssssssseeeseeeee 153 154 Appendix D Configuring the PC to Use Auto IP To set up the a TEMPpoint VOLTpoint or MEASURpoint instrument when the LAN does not support a DHCP server and your PC is configured to use a static IP address you must temporarily reconfigure the PC to use Auto IP by performing the following steps Note This procedure may differ slightly depending on your computer and the version of Windows you are using Windows XP instructions are shown here 1 From the Windows Start menu click Settings and then click Network Connections 2 Righ
103. mmand prompt window enter renews the IP address checks the IP address About ISO Channel Technology ISO Channel Technology Why ISO Channel Technology is Your Best Return On Investment o o 167 Floating Signal Inputs Offer New Application Advantages ooooocoorooomomm 159 Appendix E ISO Channel Technology All TEMPpoint VOLTpoint and MEASURpoint products use ISO Channel technology to eliminate common mode noise and ground loop problems This appendix includes two white papers that describe the benefits of using ISO Channel technology 160 About ISO Channel Technology Why ISO Channel Technology is Your Best Return on Investment When connecting signal sources to an instrument it is important to eliminate the sources of error that can contribute to inaccuracies in your measurements In most measurement instruments this burden is on the customer Instruments that use ISO Channel technology however solve this problem for you saving you tremendous setup and debug time and reducing costly grounding problems when connecting signals In today s economy we understand that every equipment decision needs to make good fiscal sense This section describes why instruments with ISO Channel technology offer you the best return on investment Understanding Ground Loops When measuring signals users often assume that the grounds of their signals and their measurement syst
104. n order from the lowest channel number to the highest channel number in the list of enabled channels this process is known as a scan How Continuous Scan Works When you issue a command to start the scan the instrument simultaneously samples all the analog input channels CJC inputs if applicable and the digital input port and converts the analog inputs to temperature resistance or voltage based on the sensor type If the channel is enabled the sampled data is placed in the FIFO on the instrument The FIFO on the instrument is used as a circular buffer Acquisition continues indefinitely until you stop the operation When the FIFO is full the operation wraps to the beginning of the FIFO values are overwritten starting at the first location in the FIFO It is up to your application to retrieve the data from the FIFO refer to your software documentation for more information The conversion rate is determined by the frequency of the input sample clock refer to page 105 for more information about the input sample clock The sample rate which is the rate at which a single entry in the channel list is sampled is the same as the conversion rate due to the simultaneous nature of the MEASURpoint instrument Figure 31 illustrates scanning a list of three enabled channels channel 0 channel 1 and channel 2 In this example analog input data is acquired simultaneously on each clock pulse of the input sample clock Data is acquired continuousl
105. n software using the Change Configuration dialog in the supplied Measurement Application or by using an API call in your application program You can also use standard SCPI commands over VISA or sockets if desired Note In a mix and match system it is easy to accidentally mismatch the software and hardware configuration for a channel Therefore it is recommended that you pay particular attention when configuring channels since the resultant errors may be not large enough to notice initially but may be significantly larger than the accuracy specification for the instrument Since each channel has its own 24 bit A D analog inputs are measured simultaneously Refer to page 105 for more information on specifying the channels for a scan Table 4 lists the supported measurement range for each thermocouple type Refer to page 102 for information on the supported input range for voltage measurements Principles of Operation Table 4 Supported Measurement Range for Each Thermocouple Type Supported Measurement Range Thermocouple Type Minimum Maximum B 0 C 32 F 1820 C 3308 F E 200 C 328 F 1000 C 1832 F J 210 C 346 F 1200 C 2192 F K 200 C 328 F 1370 C 2498 F N 200 C 328 F 1300 C 2372 F R 50 C 58 F 1750 C 3182 F S 50 C 58 F 1750 C 3182 F T 200 C 328 F 400 C 752 F Refer to Appendix A for
106. ndards and linearization Where To Get Help Should you run into problems installing or using a TEMPpoint VOLTpoint or MEASURpoint instrument the Data Translation Technical Support Department is available to provide technical assistance Refer to Chapter 7 for more information If you are outside the United States or Canada call your local distributor whose number is listed on our web site www datatranslation com 13 About this Manual 14 Overview Hardware Features cccecee ker ee A ds 16 supported BofBEMB srei csser Re Dre tr tbe Rer DR RE EA EEA EE PEE i p 20 JAUDSDIBS ridad b RR REA IeXUEPA RA PICO Pr ebteIUERMEN E E ai 22 Getting Starisd Proce Leer e ebbe bere IER EE RENE E e ee rere s 23 15 Chapter 1 16 Hardware Features Data Translation provides a number of LXI Ethernet instruments to meet your measurement needs including the following e TEMPpoint a family of temperature measurement instruments e VOLTpoint a family of voltage measurement instruments e MEASURpoint a family of mixed temperature and voltage measurement instruments All of these Ethernet instruments are class C devices that comply with LXI version 1 1 The following sections summarize the features of the TEMPpoint VOLTpoint and MEASURpoint LXI instruments TEMPpoint Features TEMPpoint instruments include the following models DT8871U DT8871 and DT8872 The key features of TEMPpoint instruments are as follows
107. ng on page 27 Set Up and Install the Instrument see Chapter 3 starting on page 35 Wire Signals this chapter d Verify the Operation of the Instrument C see Chapter 5 starting on page 65 Wiring Signals General Wiring Recommendations Keep the following recommendations in mind when wiring signals to a TEMPpoint VOLTpoint or MEASURpoint instrument Separate power and signal lines by using physically different wiring paths or conduits To avoid noise do not locate the instrument and cabling next to sources that produce high electromagnetic fields such as large electric motors power lines solenoids and electric arcs unless the signals are enclosed in a mumetal shield Locate the instrument s front panel as far away as possible from sources of high or low temperatures or strong air currents such as fans Prevent electrostatic discharge to the I O while the instrument is operational When wiring thermocouples select an appropriate wire length and gauge for each thermocouple in general use the shortest wire length and largest gauge for the application to yield best results Use shielded wire for maximum rejection of electrical interference 47 Chapter 4 48 Warm Up Time For accurate thermocouple measurements DT8871U and DT8871 TEMPpoint instruments and thermocouple channels on the DT8874 MEASURpoint instruments require a warm up time of 45 minutes for the analog circuit
108. nnor Isolation Signal Ground Figure 45 In multiplexed systems all inputs are connected to a signal ground which can cause errors when noise or common mode voltage is present Crosstalk from one input signal can easily be reflected onto another input The design movement to an A D per channel can help this problem But that is not sufficient in many cases see Figure 46 167 Appendix E 168 Signal Input 1 AID _ Common Digital gt PC Signal Ground Multiplexer PC Ground V Signal Input n Isolation Common Signal Ground Figure 46 Even when using an A D per channel noise can contribute errors to your measurement results To minimize noise and ground loops some newer systems offer isolation between the input signal ground reference and the computer ground This effectively separates the computer ground from the measurement portion of the system But still there is no isolation between input sensor channels which is a common source of error and frustration for user applications Why The assumption is made that all signal sources have the same exact ground reference After all ground is ground isn t it Often this is not the case For example thermocouples for measuring temperature may be dispersed widely throughout an industrial setting such as in the manufacture of air frames or in curing ovens Grounds for these sensor
109. ns for Thermocouple Channels Feature Specifications Additional error due to ambient temperature change J type thermocouple 0 010 C per degree ambient change typical K type thermocouple 0 011 C per degree ambient change typical B type thermocouple 0 014 C per degree ambient change typical E type thermocouple 0 010 C per degree ambient change typical N type thermocouple 0 011 C per degree ambient change typical R type thermocouple 0 012 C per degree ambient change typical S type thermocouple 0 012 C per degree ambient change typical T type thermocouple 0 010 C per degree ambient change typical Warm up time 45 minutes CJC Error 0 2 C Accuracy Corrected in ROM 25 C to zero error Drift per year 50 ppm typical a Includes the A D reference gain and CJC errors Table 17 lists the temperature stability specifications for RTD channels on the TEMPpoint and MEASURpoint instruments Table 17 Temperature Stability Specifications for RTD Channels Feature Specifications System temperature error Pt100 0 07 C 0 005 of reading Pt500 0 01 C 0 005 of reading Pt1000 20 007 C 0 00526 of reading Temperature resolution 20 0003 C based on a European PT1000 RTD Warm up time 1 minute a The system temperature error is based on the auto zero and system noise error 0 07 C fora Pt100 RTD 0 01 C for a Pt500 RTD or 0 007 C for
110. num RTD types supported using alpha curves of 0 00385 European or 0 00392 American 4 wire 3 wire or 2 wire configurations the DT8872 automatically linearizes the measurements and returns the data as 32 bit floating point temperature resistance or voltage values Input range of 1 25 V e Analog Input Channels 31 to 48 Direct connection of analog input channels for differential voltage inputs removable screw terminal blocks for each channel for quick wiring Software selectable input range of 10 V 100 V or 400 V per channel e One 24 bit Delta Sigma A D converter per channel for simultaneous high resolution measurements e 500 V galvanic isolation channel to channel and to the host computer to protect signal integrity Throughput rate of up to 10 Samples s for all channels Software or external digital trigger on digital input line 0 starts acquisition e Auto calibrating front end resets the zero point on each power up in addition the instrument supports anytime calibration performing an auto calibration function on software command Measurement Instrument Calibration Utility allows you to calibrate the instrument in the field see page 21 for more information on this utility 18 Overview 8 opto isolated digital input lines you can read the digital input port through the analog input data stream for correlating analog and digital measurements 8 opto isolated digital output lines the o
111. o Channel Isolation 00 0 cece cece ene eens 165 SUTIN AL M 166 Floating Signal Inputs Offer New Application Advantages oooooooocomooccmo 167 Isolating Each Input iiis eas m er erp ERE dee np e Ren S 168 New Application Derived from Isolated Channels 0 00000 171 SUMMA C E 172 A A RUE Ra e 173 Contents 10 About this Manual TEMPpoint is a family of temperature measurement instruments that includes the DT9871U DT9871 DT8871U DT8871 DT9872 and DT8872 This manual describes the DT8871U DT8871 and DT8872 Ethernet LXI LAN eXtensions for Instrumentation models VOLTpoint is a family of voltage measurement instruments that includes the DT9873 and DT8873 This manual describes the DT8873 LXI model MEASURpoint a family of mixed temperature and voltage measurement instruments that includes the DT9874 and DT8874 This manual describes the DT8874 LXI model Note For information on the USB models of TEMPpoint VOLTpoint and MEASURpoint refer to the User s Manual for USB Measurement Instruments The first part of this manual describes how to install and set up your instrument and verify that the instrument is working properly The second part of this manual describes the features and capabilities of your instrument using the IVI COM instrument driver software Troubleshooting information is also provided Note If you are programming the instrument using the IVI COM driver refer
112. operation of the instrument with the instrument s web interface Chapter 6 Principles of Operation describes the analog input and digital I O features of the TEMPpoint VOLTpoint and MEASURpoint instruments in detail Chapter 7 Troubleshooting provides information that you can use to resolve problems with your instrument should they occur Appendix A Specifications lists the specifications of the TEMPpoint VOLTpoint and MEASURpoint instruments Appendix B Connector Pin Assignments describes the pin assignments of the digital I O connector on the TEMPpoint VOLTpoint and MEASURpoint instruments Appendix C Using the Measurement Application describes how to use the Measurement Application with a TEMPpoint VOLTpoint or MEASURpoint instrument Appendix D Configuring Network Settings on Your PC describes how to configure the network settings of your PC to use Auto IP or a static IP address Appendix E About ISO Channel Technology describes the benefits of ISO Channel M technology An index completes this manual Conventions Used in this Manual The following conventions are used in this manual Notes provide useful information or information that requires special emphasis cautions provide information to help you avoid losing data or damaging your equipment and warnings provide information to help you avoid catastrophic damage to yourself or your equipment Items that you select or type are sh
113. or MEASURpoint MEASURpoint MEASURpoint MEASURpoint 5 V Power 5 V Power 5 V Power 5 V Power Supply Supply Supply Supply Figure 2 Typical Site LAN Connections using a Hub Switch or Router 37 Chapter 3 To Site LAN Computer To Site LAN TEMPpoint VOLTpoint or MEASURpoint 5 V Power Supply Figure 3 Typical Site LAN Connections Without Using a Hub Switch or Router Connecting to a Private LAN A private LAN or subnet generally involves the direct connection of the instruments to the computer and may include Ethernet hubs or switches Access to the instruments is limited to users that are directly connected to the private LAN therefore security performance and reliably are generally better on a private LAN than on a site LAN In this connection scheme the DHCP Dynamic Host Configuration Protocol server is typically not available therefore Auto IP is used to assign an IP address to the instrument Note If no DHCP server exists and your PC is set up to use a static IP address you must temporarily reconfigure your PC to use Auto IP as described on Appendix D starting on page 153 Connecting Using a Hub or Switch Figure 4 shows a typical connection scheme when connecting TEMPpoint VOLTpoint or MEASURpoint instruments to a private LAN using a dedicated Ethernet hub or switch Note Use standard LAN cables for network connections The instrument ships with a standard
114. ou are located outside the USA see our web site www datatranslation com for the name and telephone number of your nearest distributor 115 Chapter 7 Technical Support If you have difficulty using your TEMPpoint VOLTpoint or MEASURpoint instrument Data Translation s Technical Support Department is available to provide technical assistance To request technical support go to our web site at http www datatranslation com and click on the Support link When requesting technical support be prepared to provide the following information Your product serial number The hardware software product you need help on The version of the Instrument OMNI CD you are using Your contract number if applicable If you are located outside the USA contact your local distributor see our web site www datatranslation com for the name and telephone number of your nearest distributor 116 Troubleshooting If Your Instrument Needs Factory Service If your TEMPpoint VOLTpoint or MEASURpoint instrument must be returned to Data Translation do the following 1 Record the instrument s serial number and then contact the Customer Service Department at 508 481 3700 ext 1323 if you are in the USA and obtain a Return Material Authorization RMA If you are located outside the USA call your local distributor for authorization and shipping instructions see our web site www datatranslation com for the name and telep
115. ounded to the closest correct value that the instrument can accept without error Internally the 10 Hz clock is divided by an integer in the range of 1 to 65535 the internal clock divider to determine the closest value When you save the scan rate configuration the actual scan rate is shown 2 Click Save configuration to apply your changes If you do not save before leaving this page your changes are lost You can also click the Discard changes button before you save to return to the previous configuration if desired 80 Verifying the Operation of Your Instrument Filter Configuration Use the Configuration gt Filter web page to configure the filter type used by the instrument A screen similar to the following appears DATATRANSLATION MEASURpeent LXI DT887x 32 Home Filter Configuration Configuration Save configuration l Discard changes LAN Channel Scan rate Filter type Moving average Y Raw rm Filter Moving average Limits You can choose one of the following filter types Raw No filter Provides fast response times but the data may be difficult to interpret Use when you want to filter the data yourself The Raw filter type returns the data exactly as it comes out of the Delta Sigma A D converters Note that Delta Sigma converters provide substantial digital filtering above the Nyquist frequency Generally the only time it is desirable to use the Raw
116. outside of the legal range for that channel the Limit LMT LED on the rear panel of the instrument lights to alert you see page 43 for the location of this LED Resolution TEMPpoint VOLTpoint and MEASURpoint instruments support a resolution of 24 bits for the analog input subsystem you cannot specify the resolution in software Calibration Each TEMPpoint VOLTpoint and MEASURpoint instrument is factory calibrated to meet or exceed its published specifications using standards traceable to NIST The calibration process includes multiple steps First the A D on each channel is calibrated for offset and gain these values including the zero point are stored in ROM Then each CJC circuit is calibrated for thermocouple input channels and the reference current is characterized for RTD channels While each instrument was designed to preserve high accuracy measurements over time it is recommended that your instrument be recalibrated every year to ensure that it meets or exceeds specifications You can calibrate your instrument in the field using precise calibration equipment and the Measurement Instrument Calibration Utility described on page 21 Optionally you can return your instrument to Data Translation for recalibration For information on factory recalibration contact Data Translation at 508 481 3700 ext 1323 if you are in the USA or call your local distributor if you are located outside the USA see our web site www datatr
117. over 39 standard LAN EP372 38 calibration 104 channel to channel isolation 111 CJC circuit 101 clients 67 clocks analog input 105 cold junction compensation 101 configuring alarm limits 82 analog input channels 79 digital inputs 83 digital outputs 84 filters 81 LAN 78 scan rate 80 triggers 83 configuring network settings on PC 153 connecting signals current loop inputs to high voltage channels 60 current loop inputs to RTD channels 59 173 Index 174 current loop inputs to thermocouple channels 58 digital inputs 63 digital outputs 63 RTD inputs 51 thermocouple inputs 49 voltage inputs to high voltage channels 56 voltage inputs to RTD channels 56 voltage inputs to thermocouple channels 55 connecting to the LAN 37 private LAN 38 site LAN 37 connector pin assignments digital I O connector 137 Ethernet connector 135 continuous analog input 106 conversion modes 105 continuous analog input scan mode 106 digital I O 111 simultaneous single value analog input 106 conversion rate 107 crossover cable 39 CSV files 71 customer service 117 D data encoding 108 data format high voltage channels 108 RTD channels 108 thermocouple channels 108 DHCP server 37 38 42 differential channels 49 51 digital I O channel to channel isolation 111 connecting input signals 63 connecting output signals 63 connector pin assignments 137 controlling the outputs 87 input configuration 83 lines 110 111 operation modes 111 outpu
118. own in bold About this Manual Related Information Refer to the following documents for more information on using a TEMPpoint VOLTpoint or MEASURpoint instrument DtxMeasurement IVI COM Driver online help For programmers who are developing their own application programs using a tool other than Measure Foundry this document describes how to use the IVI COM driver to access the capabilities of your instrument The IVI COM driver works with any development environment that supports COM programming including MATLABO from The MathWorks Microsoft Visual C NET or Visual Basic9 NET Agilent VEE Pro National Instruments LabVIEW or LabWindows and so on Measure Foundry manual and online help For programmers who purchase Measure Foundry to easily create custom applications for a TEMPpoint VOLTpoint or MEASURpoint instrument these documents describe the functions and capabilities of the Measure Foundry software SCPI Programmer s Manual for LXI Measurement Instruments For programmers who want to use the SCPI interface to program a TEMPpoint VOLTpoint or MEASURpoint instrument this document describes the supported SCPI commands and example programs for these instruments IVI foundation www ivifoundation org Omega Complete Temperature Measurement Handbook and Encyclopedia or the Omega Engineering web site http www omega com Both resources provide valuable information on thermocouple types RTD types sta
119. pen the Folder Options dialog and select File Types 2 Scroll down to the CSV entry and select it If it is not in the list add it as a new file type by selecting New and entering CSV Click Advanced to access the Edit File Type dialog box Click New to access the New Action dialog box Enter Open in the Action edit field o 7 9 Click Browse and find Excel exe typically located in C Program Files Microsoft OfficeNOFFICExxN EXCEL EXE or Notepad exe typically located in C NWindowsNNotepad exe on your system and then click OK Folder Options mR General View File Types Offline Files Registered file types Extensions File Types Ecs C Source fie EBICSDP CH Device Project file 3 amp jlCSPROJ Ci Project file CSS Cascading Style Sheet Document EMJCSV Microsoft Office Excel Comma Separated Value CTL LabVIEW Control LAR eorr COSMOS eh int E New Delete Details for CSV extension Opens with EE Microsoft Office Excel Files with extension CSV are of type Microsoft Office Excel Comma Separated Values File To change settings that affect all Microsoft Office Excel Comma Separated Values File files click 7 Click OK Now when you click Download on the Download Measurements web page you should see a dialog box asking if you want to Open or Save the data in the appropriate application 71 Chapter 5 Locating Your Instrument on the LAN To access t
120. plication sisri E a aeei a E E 141 Changing the Configuration of Your Instrument osei scs ssiri esros celare tria si 144 Doroine Aar A BP 146 Losing Data ta DISK eene did i ep er beaded tdi 148 Viewing Data PIE AA E ES 150 Reading Digital Input VAIIES ors fava ee ere e Xe ee E ue ade ese Ss 151 Exiting from the Measurement Applicati0N ooooooococcccnnnnroroannnnrooo 152 139 Appendix C 140 Overview In addition to the web interface described in Chapter 5 you can verify the operation of your TEMPpoint VOLTpoint or MEASURpoint instrument using the Measurement Application that is provided with the instrument The Measurement Application developed using Measure Foundry lets you perform the following functions Configure your instrument Acquire temperature resistance and or voltage data from up to 48 analog input channels Display temperature resistance and or voltage data during acquisition Use a Chart Recorder to display and log data to an hpf file for later analysis View any hpf file and view the last recorded hpf data file in Microsoft Excel Set minimum and maximum alarm limits for each channel Set the state of the digital output lines based on alarm limits Read the state of the digital input port If desired you can use Measure Foundry to customize this application Refer to page 31 for information on installing the Measurement Application Using the Measurement Application Running the M
121. point VOLTpoint and MEASURpoint instruments report overrun errors by sending an overrun event to the application program If this error condition occurs the instrument stops acquiring and transferring data to the host computer To avoid this error try one or more of the following Reduce the sample rate Close any other applications that are running Runthe program on a faster computer 108 Principles of Operation Additionally the following constants may be reported to the host e 99999 0 SENSOR IS OPEN described on page 101 88888 0 TEMP OUT OF RANGE HIGH described on page 103 and page 104 e 88888 0 TEMP OUT OF RANGE LOW described on page 103 and page 104 If any of these constants is reported the A D subsystem continues to acquire data the error condition is cleared when the data falls within range 109 Chapter 6 Digital I O Features TEMPpoint VOLTpoint and MEASURpoint instruments provide 8 digital input lines and 8 digital output lines that you can use to control external equipment including solid state or mechanical relays This section describes the following digital I O features Digital input lines described below Digital output lines described on page 111 Channel to channel isolation described on page 111 Resolution described on page 111 Operation modes described on page 111 Digital Input Lines TEMPpoint VOLTpoint and MEASURpoint instruments feature eight isolated digital
122. pter 2 Check that you have installed your hardware properly using the instructions in Chapter 3 Check that you have wired your signals properly using the instructions in Chapter 4 Mp Check that you have installed Java and configured your web browser appropriately using the instructions on page 67 7 Search the DT Knowledgebase in the Support section of the Data Translation web site at www datatranslation com for an answer to your problem If you still experience problemas try using the information in Table 7 to isolate and solve the problem If you cannot identify the problem refer to page 116 Table 7 Troubleshooting Problems Symptom Possible Cause Possible Solution Instrument is The instrument cannot Ensure that your instrument is properly connected see the not found communicate with the instructions in Chapter 3 network If your PC has a static IP address reconfigure it for Auto IP using the instructions on page 154 Check your LAN configuration see the instructions on page 78 Check the IP address of the instrument by opening a Command Prompt window Start gt Programs gt Accessories Command Prompt and entering the command ipconfig all The IP settings of your instrument are returned Ping the instrument by opening a Command Prompt window Start gt Programs gt Accessories gt Command Prompt and entering the command ping address where address is the IP address of
123. rifying the Operation of Your Instrument Windows Firewall Gener Exceptions Advanced Windows Firewall is blocking incoming to work better but might increase your security risk Programs and Services network connections except for the ls Adding exceptions allows some programs Name Eureka LXI Instrument Discovery dBrowse v File and Printer Sharing v iTunes v LabVIEW 8 0 Development System v biAllow v biAllow v biAllow v biAllow v McAfee Framework Service e Miernentt Office Ferel me Eureka LXI Instrument Discovery must be listed as an exception v Display a notification when Windows Firewall blocks a program What are the risks of allowing exceptions 5 If Eureka LXI Instrument Discovery is not included in the exception list add the utility to the list of exceptions by doing the following a Click Add Program b Browse to C Program Files Data Translation Instrument Support Eureka exe The Eureka LXI Instrument Discovery utility appears in the window 75 Chapter 5 76 Add a Program To allow communications with a program by adding it to the Exceptions list select the program or click Browse to search for one that is not listed Programs i DT9837 Calibration Utiltity di DT9837 A Calibration Utiltity DT9840 Series Download Utility lt j DT9840 Series Flash Programmer Utility i
124. ry to stabilize For accurate high voltage measurements the DT8873 VOLTpoint instruments and high voltage channels on the DT8874 MEASURpoint instruments require a warm up time of 1 hour for the analog circuitry to stabilize For accurate RTD measurements the DT8872 TEMPpoint instruments and RTD channels on the DT8874 MEASURpoint instruments require a warm up time of 1 minute for the analog circuitry to stabilize Wiring Signals Connecting Thermocouple Inputs The DT8871U DT8871 and DT8874 instruments contain Cu Cu thermocouple jacks for connecting thermocouple inputs Note On the standard DT8874 instrument channels 0 to 15 correspond to the thermocouple input channels Internally these signals are connected in differential mode You can mix and match the following thermocouple types across channels B E J K N R S and or T Each Cu Cu thermocouple input jack is polarized and accepts a mating Cu Cu plug in the appropriate orientation Table 2 lists the color designations for the and polarities of the supported thermocouple types for both the ANSI American and IEC International standards Table 2 Thermocouple Color Designation Standards Thermocouple Thermocouple Wire Color Coding Wire Color Coding Standard Type Polarity Polarity ANSI Type J White Red Type K Yellow Red Type T Blue Red Type E Violet Red Type S Black Red T
125. s Radio and Television Interference This equipment has been tested and found to comply with CISPR EN55022 Class A and EN61000 6 1 requirements and also with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense Changes or modifications to this equipment not expressly approved by Data Translation could void your authority to operate the equipment under Part 15 of the FCC Rules Note This product was verified to meet FCC requirements under test conditions that included use of shielded cables and connectors between system components It is important that you use shielded cables and connectors to reduce the possibility of causing interference to radio television and other electronic devices Canadian Department of Communications Statement This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the C
126. s may differ by several volts or even hundreds of volts The resulting common mode voltage causes current to flow in the signal path producing serious errors which are very hard to diagnose and correct Isolating Each Input Oftentimes it is NOT apparent that ground references from various sensors such as thermocouples RTDs strain gages etc are at different voltage potentials Factors that can contribute to these ground differences are extensive wiring from long runs crosstalk from motors or generators or high source impedance from the signal source Without recognizing this extraneous voltage the measurement system sees this noise or common mode voltage as the actual signal These unwanted noise sources lead to measurement errors see Figure 47 About ISO Channel Technology Signal Source Measurement System Analog Input Signal Amplifier Analog Input Return Common Mode Voltage Figure 47 Common mode voltage is present when different ground potentials exist in your measurement system In many applications noise is a fact and a common occurrence To prevent this noise from entering the signal path the signal must be isolated on a channel to channel basis as well as from the PC ground reference Technology breakthroughs now allow channel to channel isolation to be accomplished effectively Using an A D per channel with a DC DC converter for each A D allows each signal input channel to be isolated from one another s
127. s not referenced to system ground Figure 41 Floating Signals To measure floating signal sources ISO Channel technology uses differential analog input signals a 24 bit Delta Sigma A D converter for each channel and channel to channel isolation as shown in Figure 42 162 About ISO Channel Technology DC DC Converter 24 bit A D Converter 1500V Isolation Digital Isolation Floating Reference for Sensor 1 DC DC Converter Converter 3 E Digital Isolation Floating Reference for Sensor 48 Figure 42 ISO Channel Technology Floating Differential Signals ISO Channel technology implements a virtually ideal differential measurement system that reads only the potential difference between the positive and negative terminals of the amplifier For each channel the differential signals are isolated in that they are referenced to a ground reference point that is not connected to earth ground Ground loop problems are eliminated by ensuring that only one ground reference is used for each channel in the measurement system The signal sources are isolated from each other and from the measurement instrument 163 Appendix E 164 Signal Source Measurement System Analog Input Signal Amplifier Analog Input Return G4 eS Common Mode Voltage Figure 43 Differential Signals and Common Mode Voltage When the measurement instrument and signal source are at different ground potentials the di
128. se inputs Note For best accuracy when connecting voltage inputs use twisted pair wires with a dead ended shield connected to pin 4 of the screw terminal block 57 Chapter 4 Connecting Current Loop Inputs In some applications such as solar cell fuel cell and car battery testing applications you may want to accurately sense and measure current in a high voltage loop TEMPpoint VOLTpoint and MEASURpoint instruments provide channel to channel isolation of 500 V meaning that each input can be referenced to 500 V The way you connect current loop inputs depends on the channel type you are using This section describes how to connect current loop inputs to thermocouple input channels RTD input channels and high voltage input channels Connecting Current Loop Inputs to Thermocouple Channels Thermocouple input channels on the DT8871U and DT8874 have an input range of 0 075 V Therefore you can use a 1 Q series resistor to measure 0 075 A Similarly you can use a 0 1 Q series resistor to measure 0 75 A Thermocouple input channels on the DT8871 have an input range of 1 25 V Therefore you can use a 1 Qseries resistor to measure 1 25 A Similarly you can use a 0 1 Q series resistor to measure 12 5 A or a 10 Oseries resistor to measure 0 125 A Figure 18 shows how to wire your signals to measure a current loop In this example the input is referenced to 80 V Note On the standard DT8874 instrument ch
129. t click Local Area Connection and select Properties Local Area Connection Properties General Advanced 4 Connect using Hil Broadcom 44 x 10 100 Integrated C rn This connection uses the following items M1 433 File and Printer Sharing for Microsoft Networks A E QoS Packet Scheduler 2 Intemet Protocol TCP IP ed v ME mi roperties Description Transmission Control Protocol Intemet Protocol The default wide area network protocol that provides communication across diverse interconnected networks v Show icon in notification area when connected v Notify me when this connection has limited or no connectivity ok Camel 3 In the General tab window double click Internet protocol TCP IP If a TCP IP selection is not listed click Install select Protocol click Add select the TCP IP protocol and click Install and repeat step 3 Configuring Network Settings on Your PC Internet Protocol TCP IP Properties General You can get IP settings assigned automatically if your network supports this capability Otherwise you need to ask your network administrator for the appropriate IP settings Obtain an IP address automatically 2 Use the following IP address IP address HN 4 0 34 255 255 255 0 Subnet mask Default gateway Use the following DNS server addresses Preferred DNS server Altemate DNS server 4 IMPORT
130. t configuration 84 reading the digital input port in the analog data stream 106 reading the inputs 88 resolution 111 specifications 131 subsystem specifications 131 digital trigger 105 discovery utility Eureka 20 31 72 DNS server 42 downloading measurements 89 E encoding data 108 ENet Activity LED 43 ENet Link LED 43 environmental specifications 132 EP333 cable assembly 22 62 EP372 LAN cable 38 error conditions 108 Ethernet activity 43 Ethernet cable 37 38 Ethernet connector specifications 135 Ethernet crossover cable 39 Eureka Discovery Utility 20 31 firewall settings 73 installing 31 running 72 troubleshooting 73 using 72 Excel 71 opening a data file 149 using to display data 90 external digital trigger 105 F factory service 117 features 16 FIFO 107 filters 81 107 floating point data 108 formatting data high voltage channels 108 RID channels 108 thermocouple channels 108 frequency 105 G GMT 77 H hardware features 16 high drive digital outputs 64 host name 42 Index hub using with a private LAN 38 using with a site LAN 37 j input ranges 102 installing the software 31 Eureka Discovery Utility 31 IVI COM driver 31 Measurement Application 31 prerequisites 31 SCPI support 32 instrument web interface 20 Internet Explorer browser settings 67 JavaScript 68 pop up blockers 70 security levels 68 Internet zone 68 Intranet zone 69 IP address 42 ISO Channel technology 159 isol
131. t teens 111 Resolution rere ere ORE STR EIN RUN SERRE ES 111 Operation Modes 5st Re eR Rr EE bx UAE EES da Ed bodies 111 Chapter 7 Troubleshooting isses nh 113 General Checklist o ee M SR os 114 J chnicalSuppott rererere nr po A e eese eee een ds 116 If Your Instrument Needs Factory Service 2 66 6c cee eee eens 117 Appendix A Specifications 0 00 eee eee 119 Basic Instrument Specifications 0000s 120 Thermocouple Specifications 2 0 eens 121 System Temperature Error for the DT8871U and DT8874 0004 121 System Temperature Error for the DT8871 0 00 e eee eee eee 123 RED Specifications ec ee eR ettet beet tede a ace t teh 125 Isolation and Protection Specifications 0 2 cee ees 126 Memory Specifications gic as io o M bet E e fone tetur ded 127 Temperature Stability Specificati0NS oooooooccconorrroronnnnrnnaann eee 128 Voltage Measurement Specifications 0 0 6 eee eee es 129 Digital 1 O Specifications rer eee e CHR eee eee eee 131 Power Physical and Environmental Specifications ooo oooocooooccommommmoo o 132 Regulatory 5pecificatiofis eei ua ag es nae ya kg rd e qd e e e eed hd s 133 Connector Specifications 0 66 nnn 134 Thermocouple Connectors 0 iin eei a nns 134 RID C onnNectofs 214 RD E rar atras aa E RA 134 High Voltage Connectors issssssss enn 134 Ethernet RJ45 Connector ooocooccco
132. ta and Controlling the Instrument oooooocccooncnrcoronnnonoooo 85 Downloading MOasanemeris ci ie id dee oce es ee eee Eee yg ec dd 89 65 Chapter 5 66 Prepare to Use the Instrument see Chapter 2 starting on page 27 Set Up and Install the Instrument see Chapter 3 starting on page 35 Wire Signals see Chapter 4 starting on page 45 Verify the Operation of the Instrument this chapter You can verify the operation of your instrument using the instrument s web interface You can configure measure and control the instrument either locally or remotely using this interface You can also use the provided Measurement Application developed in Measure Foundry for more complex data analysis This chapter focuses on verifying your instrument using the web interface refer to Appendix C starting on page 139 for information on using the Measurement Application Verifying the Operation of Your Instrument Before Using the Web Interface This section describes system requirements and browser settings for proper operation of the instrument s web interface Note Atany instant up to 8 clients can access the instrument concurrently using the web interface Up to 12 additional clients can access the instrument concurrently using SCPI commands over VISA or sockets Of these 4 can be VXI 11 clients which use the SOCKETS or VISA INSTR resource to access the instrument At this
133. the thermocouple accuracy of thermocouple channels over the dynamic range of the instrument Cold Junction Compensation Each thermocouple channel has its own cold junction compensation CJC at the input The software reads the value of the CJC input along with the value of the analog input channel and automatically corrects for errors based on the specified thermocouple type and the thermocouple linearization data stored in onboard ROM A separate multiplexed A D is used to acquire all the CJC input values The software takes care of correlating the CJC measurements with the analog input measurements Note The software provides the option of returning CJC values in the data stream This option is seldom used but is provided if you want to implement your own temperature conversion algorithms in software when using continuous operations Refer to page 108 for more information on this feature Open Thermocouple Detection Break detection circuitry 10 nA on the DT8871U and DT8874 100 nA on the DT8871 is provided for thermocouple channels to ensure that open thermocouples are detected The Open OPN LED on the rear panel lights when this condition occurs see Figure 8 on page 43 for the location of this LED 101 Chapter 6 102 In addition the software returns the value SENSOR IS OPEN 99999 decimal for any channel that was configured for a thermocouple input and has either an open thermocouple or no thermocouple connecte
134. tighten any loose connections or cushion vibration sources see the instructions in Chapter 4 The instrument is overheating Check environmental and ambient temperature consult the specifications on page 132 of this manual and the documentation provided by your computer manufacturer for more information Electrical noise exists Check your wiring and either provide better shielding or reroute unshielded wiring see the instructions in Chapter 4 Data appears to be invalid An open connection exists Check your wiring and fix any open connections see the instructions in Chapter 4 A transducer is not connected to the channel being read Check the transducer connections see the instructions in Chapter 4 The thermocouple RTD or voltage input that you connected to the channel does not match the software configuration for that channel Check your wiring and ensure that what you specify in software matches your hardware configuration see the instructions in Chapter 4 Your instrument may need recalibration The instrument is calibrated at the factory Thereafter yearly calibration is recommended Use the Measurement Instrument Calibration Utility described on page 21 or return your instrument to Data Translation for recalibration For information on factory recalibration contact Data Translation at 508 481 3700 ext 1323 if you are in the USA of call your local distributor if y
135. time the web and SCPI interfaces cannot be locked therefore one client can change the configuration of the instrument that another client is accessing However you can optionally lock the VXI 11 interface using the VISA APIs viLock viUnlock this prevents other VXI 11 clients including VXI 11 discovery from accessing the instrument Refer to the SCPI documentation for your instrument for more information on supported SCPI commands Java Requirements Before using the instrument web interface ensure that your computer has Version 6 Update 5 or greater of Java installed this version of Java installs version 1 6 of the Java plug in To download or upgrade Java go to www java com To verify that you have version 1 6 of the Java plug in installed do the following 1 Launch version 6 0 or 7 0 of Internet Explorer 2 From the Internet Explorer browser select Tools gt Sun Java Console The Java Console window appears 3 Verify that version 1 6 or greater of the Java plug in installed Java Console Java Plug in 1 6 0 05 Using JRE version 1 6 0 05 Java HotSpot TM Client VM Internet Explorer Browser Settings For proper operation of the instrument s web interface ensure that your Internet Explorer 6 0 or 7 0 browser is configured as follows JavaScript Active Scripting must be enabled Security level of the instrument s IP address must be Medium high or lower e Pop up blockers must be disabled 67 Chapter 5
136. to RTD Channels 56 Connecting Voltage Inputs to High Voltage Channels 000 56 Connecting Current Loop Inputs 0 6 66 nr n 58 Connecting Current Loop Inputs to Thermocouple Channels 58 Connecting Current Loop Inputs to RTD Channels 59 Connecting Current Loop Inputs to High Voltage Channels 60 Connecting Digital I O Signals ssssssss eh 62 Connecting Digital Input Signals ooooooooccccccccccoco rro 63 Connecting Digital Output Signals 0 00 63 Chapter 5 Verifying the Operation of Your Instrument ooo ooooo 65 Before Using the Web Interface sssssssssee ene 67 Java Requirements ies Lese com bed Uode es du dues du cad rper Feb 67 Internet Explorer BrowserSettings sse 67 JavVaScHpt uc AE o ROI Raetia ta d Needed 68 Security Levels essi seas EENE sepe eaquse esta d Ee ob E Rab sd 68 Internet Zone 5 Le Mu E ERE Ru b eias 68 Local Intranet Zone i ce RARE ERR EE EAE E 69 Trusted Sites Zone aoea ep heehee a RAN ep EE d e eR dme ed 70 Pop up Blockersz c See oo o Me O AA 70 Associating CSV Files with Microsoft Excel or Notepad oooooooooocooooro oo 71 Locating Your Instrument on the LAN 0 6 nr 72 Running the Eureka Discovery Utility 0 0 0 e eee eee 72 Configuring Windows Firewall Settings sss 73 Launching the Web Interface 0 66 e 76 Configuring the Instrument
137. ts If you are prompted for a password before the instrument reboots you must enter your original password Contact your system administrator and view the instrument s built in help pages to determine the correct LAN settings Channel Configuration Use the Configuration gt Channel web page to enable the channels that you want to measure specify the sensor to use for each channel and add a label to describe each channel if desired A screen similar to the following appears DATATRANSLATION VOLTpernt LXI DT887x 32 Home Channel Configuration Configuration Save configuration I Discard changes LAN de Channel Enable Channel Transducer RENE Label Channel Disable all Scan rate Filter 0 v Enable 10V s 1 10 V Input Limits 1 Y Enable s 100v Rl 4 100 v Input Digital Input amp Trigger EE Digital Output 2 Enable BAM M 1 400 V input Measurement amp control 3 V Enable 210V v Channel E 4 Y Enable 10V v Digital Input Digital Output 5 Y Enable 10V v s 6 V Enable lt 10v v i E Download Measurements 7 V Enable 210V v 8 V Enable 210V v 9 v Enable 10V v 10 Y Enable 10V v 11 V Enable 10V Y 12 Y Enable e 10V vi 13 V Enable 10V v 14 V Enable lt 10v v 15 Y Enable s 10v y 3 lt gt To change your channel configuration do the following 1 Under
138. ts have an input range of 10 V 100 V or 400 V You select the input range for each channel using software Note On older versions of the instrument the input range was fixed and depended on the model you purchased With the 24 bit A D converter high current high side current shunts can be used for resolutions of less than 0 01 A on a 100 A range Typical Shunts e Vishay WSMS5515 2 MQ 2 2 100 A 20 uV e Vishay CSM2512S 10 mQ 1 Q 10 A 100 uV e Deltec MUB 500 50 1 mQ 25 Q 500 A 50 uV 60 Wiring Signals Note The resolution is 2 mV on a 100 V range and 0 3 mV on the 10 V range Since the resolution of the 400 V range is 8 mV using current loop inputs with this range is impractical in most applications On the standard DT8874 instrument channels 32 to 47 correspond to the high voltage input channels Figure 20 shows an example of wiring signals to measure 20 mA using the 10 V input range High Voltage Channel Sense Sense m EEE M gt Shield 20 mA Load AM 250 Q shunt resistor 28 V can be up to 500 V In this example the input range is 10 V Figure 20 Connecting a Current Loop Input to a High Voltage Channel to Measure 20 mA 61 Chapter 4 Connecting Digital I O Signals To make digital I O connections easier you can use the optional STP37 screw termina
139. ts the specifications for the thermocouple connectors used on the TEMPpoint and MEASURpoint instruments Table 22 Thermocouple Connector Specifications Feature Specifications Thermocouple jacks Cu Cu Omega plugs White SMPW U M Thermocouple connector Omega partit PCC SMP U 100 R CE ROHS RTD Connectors Table 23 lists the specifications for the RTD connectors used on the TEMPpoint and MEASURpoint instruments Table 23 RTD Connector Specifications Feature Specifications 4 Position screw terminal block header Phoenix Contact 1803293 4 Position screw terminal block plug Phoenix Contact 1803594 High Voltage Connectors Table 24 lists the specifications for the high voltage connectors used on the VOLTpoint and MEASURpoint instruments Table 24 Voltage Connector Specifications Feature Specifications 4 Position screw terminal block header Phoenix Contact 1803293 4 Position screw terminal block plug Phoenix Contact 1803594 134 Specifications Ethernet RJ45 Connector The Ethernet RJ45 connector used on the TEMPpoint VOLTpoint and MEASURpoint instruments is shown in Figure 38 Pin Pin 1 Figure 38 Ethernet RJ45 Connector The pin assignments of this connector are described in Table 25 Table 25 Ethernet Connector Pin Assignments Pin Signal Name Description 1 TXD Transmit Data 2 TXD Transmit Data 3 RXD
140. ture stability 128 thermocouple 121 thermocouple connectors 134 voltage connectors 134 voltage measurement 129 static IP addresses 78 154 158 STP37 screw terminal panel 22 62 switch using with a private LAN 38 using with a site LAN 37 system requirements 30 system temperature error 121 123 T TCP IP configuration 42 technical support 116 temperature error 121 123 temperature stability specifications 128 thermocouple accuracy specifications 121 123 thermocouple channels data format 108 thermocouple connector specifications 134 Thermocouple Open LED 43 thermocouple types 100 Index time zone 77 trigger source 105 external 105 software 105 triggers 83 troubleshooting procedure 114 technical support 116 troubleshooting table 114 Trusted Site zone 70 U unpacking 29 USB LED 43 username 79 UTC 77 V VISA alias 42 VISA resource string 42 voltage connector specifications 134 voltage measurement specifications 129 VXI 11 clients 67 W warm up time 48 web interface 20 76 alarm limit configuration 82 analog input channel configuration 79 clients 67 controlling the digital outputs 87 digital input and trigger configuration 83 digital output configuration 84 downloading measurements 89 filter configuration 81 LAN configuration 78 measurement and controlling the instrument 85 reading the digital inputs 88 requirements for using 67 scan rate configuration 80 starting and stopping a scan 85 wiring
141. utput Definition Window button from the Limit Definition screen The following screen appears 146 Using the Measurement Application Digital Output Definition 5 For each channel select the digital output line bit that you want to turn on when the limits for a channel are exceeded If you do not want to set a digital output line when the alarm limits are exceeded choose none Note You can assign the same digital output line to multiple channels The digital output line is turned on 1 when any of the alarm limits are exceeded on the channels that were assigned to that digital output line If alarm limits are not exceeded the digital output line is turned off 0 6 Tosee the state of the digital output lines click the OUT button from main window or from the Windows menu select Digital Output Panel A screen similar to the following appears Digital Output Monitor 147 Appendix C Logging Data to Disk To log data to disk perform the following steps 1 Ensure that you configured the channels that you want to log to disk see page 145 2 Start acquisition by clicking the Start Stop button from the main window or from the Acquisition menu by selecting Start Acquisition 3 Click the Chart Recorder button on the main window or from the Windows menu select Chart Recorder A screen similar to the following appears a Measurem
142. utputs are solid state relays that operate from x30 V at currents up to 400 mA peak AC or DC 19 Chapter 1 20 Supported Software The following software is available for use with the TEMPpoint VOLTpoint and MEASURpoint instruments Eureka Discovery Utility This utility helps you locate or discover all LXI Ethernet instruments that are connected to your system and provides the following information about your instrument the IP address manufacturer model number serial number and version of the firmware that is running on your instrument In addition you can use this utility to configure Windows firewall settings and update the firmware for your Data Translation LXI instrument Instrument Web Interface This built in interface described in Chapter 5 allows you to verify the operation of your instrument and perform basic functions with Internet Explorer and no additional software Using it you can configure your instrument control output signals measure input signals and save results to disk Measurement Application This application developed using Measure Foundry lets you do the following Configure your instrument Acquire temperature voltage or resistance data from up to 48 analog input channels Display acquired temperature voltage or resistance data during acquisition Set alarm limits for each channel Update the value of the digital output lines based on alarm conditions
143. y Chan 2 Chan 2 Chan 2 Chan 2 Chan 1 Chan 1 Chan 1 Chan 1 Chan 0 Chan 0 Chan 0 Chan 0 Input Sample Clock Data is acquired continuously Operation starts Figure 31 Continuous Scan Mode Filtering TEMPpoint VOLTpoint and MEASURpoint instruments use a Delta Sigma analog to digital converter ADC for each analog input channel to provide simultaneous sampling of all inputs The Delta Sigma converter operates at 10 Hz effectively providing a filter that rejects 50 Hz and 60 Hz power line frequency components and that removes aliasing a condition where high frequency input components erroneously appear as lower frequencies after sampling In addition to the filter provided in hardware you can further reduce noise by selecting one of the following filter options in software Moving Average or Raw Refer to page 81 and to your software documentation for more information on selecting a filter type 107 Chapter 6 Data Format TEMPpoint VOLTpoint and MEASURpoint instruments return data as 32 bit floating point values How the data is returned depends on the channel type as described in the following subsections Data Format for Thermocouple Channels If you specify a thermocouple type of None for a thermocouple input channel a voltage measurement is selected and the instrument returns a voltage value For the DT8871U and DT8874 instruments the value is in the range of 0 075 V for the DT88
144. your network administrator for more details 157 Appendix D 158 Reconfiguring the PC to Use a Static IP Address After you have set up your instrument you can reconfigure your PC to use a static IP address using this procedure 1 5 Renew the IP address of the computer From the Windows Start menu click Settings Network Connections gt Local Area Connection gt Support gt Repair ipconfig renew ipconfig all From the Windows Start menu click Settings and then click Network Connections 2 Right click Local Area Connection and select Properties 3 In the General tab window double click Internet protocol TCP IP 4 Select Use the following IP address specify the static IP address and subnet mask that was initially assigned to the PC see page 154 and click OK Internet Protocol TCP IP Properties General You can get IP settings assigned automatically if your network supports this capability Otherwise you need to ask your network administrator for the appropriate IP settings Obtain an IP address automatically Use the following IP address IP address MA Subnet mask 255255255 0 Default gateway Use the following DNS server addresses Preferred DNS server Altemate DNS server Or if you prefer to do this from the command prompt window click Run from the Windows Start menu enter cmd and click OK to bring up the command prompt window Then from the co
145. ype R Black Red Type B Gray Red Type N Orange Red IEC Type J Black White Type K Green White Type T Brown White Type E Violet White Type S Orange White Type R Orange White Type B Gray White Type N Pink White For more information on thermocouple standards refer to the following web site http www omega com thermocouples html 49 Chapter 4 Figure 9 shows how to connect a thermocouple input to a thermocouple channel Thermocouple Channel Vw Omega Cu Cu Plug SMPW U M ea o e J Thermocouple Input l V Figure 9 Connecting Thermocouple Inputs 50 Wiring Signals Connecting RTD Inputs Each DT8872 and DT8874 contains pluggable screw terminals for connecting RTD inputs Note On the standard DT8874 instrument channels 16 to 31 correspond to the RTD input channels Internally these signals are connected in differential mode Figure 10 shows the numbering of the screw terminal blocks for RTD connections vo o oqo07 EEE 4 3 2 1 Return Sense Sense Current Figure 10 Screw Terminal Block Numbering for RTD Connections Note To make wiring easier use the supplied screwdriver to attach your signals to the screw terminal blocks When you are finished plug the screw terminal block into the screw terminal header that corresponds to the channel to which you are wiring

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