NI 9213 Datasheet - National Instruments

1 DATASHEETNI 921316 TC, 78 mV, 24 Bit, 75 S/s Aggregate Spring-terminal connectivity 50 Hz/60 Hz noise rejection Up to C measurement sensitivity 250 Vrms, CAT II, channel-to-earth isolationThe NI 9213 is a high-density thermocouple module for CompactDAQ and CompactRIOchassis. Designed for higher-channel-count systems, the NI 9213 adds thermocouples tomixed-signal test systems without taking up too many ContentsAccessories NI 9213 NI 9213 getting started Guide NI 9940 Backshell Connector KitNI 9213NI 9214* For a J type thermocouple at 100 C using high-resolution mode when S/s/chScrew TerminalSpring TerminalIsothermalTerminal BlockIsothermalTerminal Block250 VrmsCh-Earth250 VrmsCh-Ch250 VrmsCh-Earth250 VrmsCh-Earth14 S/s68 S/sIsolationContinuousConnectivitySample RateSoftwareSelectableOTD Autozero ProductNameNI 9211NI 9212 ChannelsMaximumAccuracy*( C) C SERIES THERMOCOUPLE module COMPARISONNI C Series OverviewNI provides more than 100 C Series modules for measurement, control, and communicationapplications.

2 C Series modules can connect to any sensor or bus and allow for high-accuracymeasurements that meet the demands of advanced data acquisition and control applications. Measurement-specific signal conditioning that connects to an array of sensors and signals Isolation options such as bank-to-bank, channel-to-channel, and channel-to-earth ground -40 C to 70 C temperature range to meet a variety of application and environmentalneeds Hot-swappableThe majority of C Series modules are supported in both CompactRIO and CompactDAQplatforms and you can move modules from one platform to the other with no | | NI 9213 DatasheetCompactRIOC ompactRIO combines an open-embedded architecturewith small size, extreme ruggedness, and C Seriesmodules in a platform powered by the NI labview reconfigurable I/O (RIO) architecture. Each systemcontains an FPGA for custom timing, triggering, andprocessing with a wide array of available modular I/O tomeet any embedded application is a portable, rugged data acquisition platformthat integrates connectivity, data acquisition, and signalconditioning into modular I/O for directly interfacing to anysensor or signal.

3 Using CompactDAQ with labview , youcan easily customize how you acquire, analyze, visualize,and manage your measurement Professional Development System for Windows Use advanced software tools for large project development Generate code automatically using DAQ Assistant and InstrumentI/O Assistant Use advanced measurement analysis and digital signal processing Take advantage of open connectivity with DLLs, ActiveX,and .NET objects Build DLLs, executables, and MSI installersNI labview FPGA module Design FPGA applications for NI RIO hardware Program with the same graphical environment used for desktop andreal- time applications Execute control algorithms with loop rates up to 300 MHz Implement custom timing and triggering logic, digital protocols, andDSP algorithms Incorporate existing HDL code and third-party IP including Xilinx IPgenerator functions Purchase as part of the labview Embedded Control and MonitoringSuiteNI 9213 Datasheet | National Instruments | 3NI labview real - time module Design deterministic real - time applications with labview graphical programming Download to dedicated NI or third-party hardware for reliableexecution and a wide selection of I/O Take advantage of built-in PID control, signal processing.

4 Andanalysis functions Automatically take advantage of multicore CPUs or setprocessor affinity manually Take advantage of real - time OS, development and debuggingsupport, and board support Purchase individually or as part of a labview suiteNI 9213 CircuitryEach channel passes through a differential filter and then is multiplexed and sampled by a 24-bit analog-to-digital converter (ADC). The channels share a common ground, COM, that isisolated from other modules in the 1. Input Circuitry for One Channel of the NI 9213TC+TC COMNI 9213 InputImpedanceOpenThermocoupleDetectionC urrent FilteredDifferentialAmplifierandMultiple xerIsolatedADC39 M 39 M Common-Mode VoltageThe NI 9213 common-mode range is the maximum voltage between any channel and COM. IfCOM is not connected, then the common-mode voltage range is the maximum voltagebetween any two channels. The NI 9213 measures the common-mode voltage level of eachchannel and returns a warning in the software if the signal is outside the common-modevoltage Thermocouple DetectionEach channel has an open thermocouple detection (OTD) circuit, which consists of a currentsource between the TC+ and TC- terminals.

5 If an open thermocouple is connected to thechannel, the current source forces a full-scale voltage across the | | NI 9213 DatasheetInput ImpedanceEach channel has a resistor that produces an input impedance between the TC and COMterminals. The gain and offset errors resulting from the source impedance of connectedthermocouples are negligible for most applications. Thermocouples with a higher leadresistance can introduce more significant Measurement AccuracyThermocouple measurement errors depend partly on the following factors: the type of thermocouple the accuracy of the thermocouple the temperature that you are measuring the resistance of the thermocouple wires the cold-junction temperatureFor the best accuracy performance, follow these guidelines: Set up the NI 9213 according to the getting started guide on to minimizethermal gradients across the NI 9213 terminals. Use the autozero channel to compensate for offset AccuracyHeat dissipated by adjacent C Series modules or nearby heat sources can cause errors inthermocouple measurements by heating the NI 9213 terminals to a different temperature thanthe cold-junction compensation sensor.

6 Thermal gradient across the terminals can cause theterminals of different NI 9213 channels to be at different temperatures, which creates accuracyerrors and affects the relative accuracy between temperature measurement accuracy specifications include errors caused by the thermalgradient across the NI 9213 terminals for configurations with the NI 9213 terminals facingforward or ChannelThe NI 9213 has an internal autozero channel, which can be subtracted from eachthermocouple reading to compensate for offset errors. Use of the autozero channel is optional,however the NI 9213 specifications assume that autozero is applied to every sample. Refer tothe documentation for the software that you are using with the NI 9213 for information aboutusing the autozero ModesThe NI 9213 supports high-resolution and high-speed timing modes. High-resolution timingmode optimizes accuracy and noise and rejects power line frequencies. High-speed timingmode optimizes sample rate and signal 9213 Datasheet | National Instruments | 5NI 9213 SpecificationsThe following specifications are typical for the range -40 C to 70 C unless otherwise Do not operate the NI 9213 in a manner not specified in this misuse can result in a hazard.

7 You can compromise the safety protectionbuilt into the product if the product is damaged in any way. If the product isdamaged, return it to NI for time15 minutesInput CharacteristicsNumber of channels16 thermocouple channels, 1 internal autozerochannel, 1 internal cold-junction compensationchannelADC resolution24 bitsType of ADCD elta-SigmaSampling modeScannedVoltage measurement range mVTemperature measurement rangesWorks over temperature ranges defined byNIST (J, K, T, E, N, B, R, S thermocoupletypes)Table 1. Timing ModesTiming ModeConversion time (Per Channel)Sample Rate1 (All Channels2) High-resolution55 ms1 S/sHigh-speed740 s75 S/sCommon-mode voltage rangeChannel-to-COM V minimumCOM-to-earth ground 250 V1If you are using fewer than all channels, the sample rate might be faster. The maximum samplerate = 1/(Conversion time x Number of Channels), or 100 S/s, whichever is faster than the maximum sample rate may result in the degradation of the autozero and cold-junction | | NI 9213 DatasheetCommon-mode rejection ratioHigh-resolution mode (at DC and 50 Hz to 60 Hz)Channel-to-COM100 dBCOM-to-earth ground>170 dBHigh-speed mode (at 0 Hz to 60 Hz)Channel-to-COM70 dBCOM-to-earth ground>150 dBInput bandwidthHigh-resolution HzHigh-speed mode78 HzHigh-resolution noise rejection (at 50 Hz and60 Hz)

8 60 dBOvervoltage protection 30 V between any two inputsDifferential input impedance78 M Input current50 nAInput noiseHigh-resolution mode200 nVrmsHigh-speed mode7 VrmsGain errorHigh-resolution modeat 25 typicalat -40 C to 70 typical, maximumHigh-speed modeat 25 typicalat -40 C to 70 typical, maximumOffset errorHigh-resolution mode4 V typical, 6 V maximumHigh-speed mode14 V typical, 17 V maximumOffset error from source impedanceAdd V per , when source impedance>50 NI 9213 Datasheet | National Instruments | 7 Cold-junction compensation accuracy0 C to 70 C typical, C maximum-40 C to 70 C typical, C maximumMTBF852,407 hours at 25 C;Bellcore Issue 2, Method 1,Case 3, LimitedPart Stress MethodTemperature Measurement AccuracyMeasurement sensitivity3 High-resolution modeTypes J, K, T, E, N< CTypes B, R, S< CHigh-speed modeTypes J, K, T, E< CType N< CType B< CTypes R, S< CThe following figures show the errors for each thermocouple type when connected to theNI 9213 with the autozero channel on.

9 The figures display the maximum errors over a fulltemperature range and typical errors at room temperature. The figures account for gain errors,offset errors, differential and integral nonlinearity, quantization errors, noise errors, 50 leadwire resistance, and cold-junction compensation errors. The figures do not account for theaccuracy of the thermocouple sensitivity represents the smallest change in a temperature that a sensor can detect. Itis a function of noise. The values assume the full measurement range of the standard thermocouplesensor according to ASTM | | NI 9213 DatasheetFigure 2. Thermocouple Types J and N ErrorsMeasured Temperature ( C)Measurement Error ( C)013452 2005030055080010501300 Max (High speed), 40 to 70 CMax (High res), 40 to 70 C Typ (High res), room tempTyp (High speed), room temp Figure 3. Thermocouple Type K ErrorsMeasured Temperature ( C)Measurement Error ( C)014532 2000200400600800100012001400 Max (High speed), 40 to 70 CMax (High res), 40 to 70 C Typ (High res), room tempTyp (High speed), room temp NI 9213 Datasheet | National Instruments | 9 Figure 4.

10 Thermocouple Types T and E ErrorsMeasured Temperature ( C)Measurement Error ( C)Max (High speed), 40 to 70 CMax (High res), 40 to 70 C Typ (High res), room tempTyp (High speed), room temp 01342 20002004006008001000 Figure 5. Thermocouple Type B ErrorsMeasured Temperature ( C)Measurement Error ( C)026420040060080010001200140016001800 Max (High speed), 40 to 70 CMax (High res), 40 to 70 C Typ (High res), room tempTyp (High speed), room temp Figure 6. Thermocouple Types R and S ErrorsMeasured Temperature ( C)Measurement Error ( C)0264 200020040060080010001200140016001800 Max (High speed), 40 to 70 CMax (High res), 40 to 70 C Typ (High res), room tempTyp (High speed), room temp 10 | | NI 9213 DatasheetPower RequirementsPower consumption from chassisActive mode490 mW maximumSleep mode25 W maximumThermal dissipation (at 70 C)Active mode840 mW maximumSleep mode710 mW maximumPhysical CharacteristicsIf you need to clean the module , wipe it with a dry For two-dimensional drawings and three-dimensional models of the C Seriesmodule and connectors, visit and search by module mm2 to mm2 (28 AWG to 18 AWG)copper conductor wireWire strip length7 mm ( in.)