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National Instruments NI 9214 Скачать руководство пользователя страница 26

NI 9214 Operating Instructions and Specifications

26

ni.com

Temperature Measurement Accuracy

Meas

u

rement sensitivity

1

High-resol

u

tion mode

Types J, K, T, E, N ............... 0.01 °C
Types R, S ............................ 0.03 °C
Type B .................................. 0.04 °C

High-speed mode

Types J, K, T, E .................... 0.10 °C
Type N.................................. 0.11 °C
Types R, S ............................ 0.36 °C
Type B .................................. 0.48 °C

1

Meas

u

rement sensitivity represents the smallest change in temperat

u

re that a sensor

can detect. It is a f

u

nction of noise. The val

u

es ass

u

me the median of the f

u

ll

meas

u

rement range of the standard thermoco

u

ple sensor according to NIST

Monograph 175.

NI_9214.fm Page 26 Monday, November 1, 2010 9:52 AM

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Содержание NI 9214

Страница 1: ...PERATING INSTRUCTIONS AND SPECIFICATIONS NI 9214 with NI TB 9214 16 Channel Thermocouple Input Module with Terminal Block ni com manuals Deutsch Français NI_9214 fm Page 1 Monday November 1 2010 9 52 AM ...

Страница 2: ...com info and enter cseriesdoc for information about C Series documentation Visit ni com info and enter compatibility for information about chassis and carrier compatibility for the modules you are using Note The safety guidelines and specifications in this document are specific to the NI 9214 used in conjunction with an NI TB 9214 The other components in the system might not meet the same safety r...

Страница 3: ...ous voltages are connected to the module take the following precautions A hazardous voltage is a voltage greater than 42 4 Vpk or 60 VDC to earth ground Caution Ensure that hazardous voltage wiring is performed only by qualified personnel adhering to local electrical standards Caution Do not mix hazardous voltage circuits and human accessible circuits on the same module Caution Make sure that devi...

Страница 4: ...le are properly insulated from human contact You must use the NI TB 9214 terminal block included with the NI 9214 to ensure that the terminals are not accessible Figure 1 shows the NI TB 9214 terminal block Figure 1 NI TB 9214 Terminal Block Note The NI TB 9214 contains a plastic insert to prevent accidental wire contact with the metal enclosure NI_9214 fm Page 4 Monday November 1 2010 9 52 AM ...

Страница 5: ...us injury or death Caution Do not disconnect I O side wires or connectors unless power has been switched off or the area is known to be nonhazardous Caution Do not remove modules unless power has been switched off or the area is known to be nonhazardous Caution Substitution of components may impair suitability for Class I Division 2 and Zone 2 Caution For Division 2 and Zone 2 applications install...

Страница 6: ...mpatibility Guidelines This product was tested and complies with the regulatory requirements and limits for electromagnetic compatibility EMC as stated in the product specifications These requirements and limits are designed to provide reasonable protection against harmful interference when the product is operated in its intended operational electromagnetic environment This product is intended for...

Страница 7: ...es Special Guidelines for Marine Applications Some products are Lloyd s Register LR Type Approved for marine shipboard applications To verify Lloyd s Register certification for a product visit ni com certification and search for the LR certificate or look for the Lloyd s Register mark on the product label Caution In order to meet the EMC requirements for marine applications install the product in ...

Страница 8: ...rovides connections for 16 thermocouple channels on the NI 9214 Figure 2 NI TB 9214 Terminal Reference TC0 TC0 TC1 TC1 TC5 TC5 TC6 TC6 TC2 TC4 TC4 TC3 TC3 TC2 TC7 TC9 TC9 TC8 TC8 TC7 TC10 TC12 TC12 TC11 TC11 TC10 TC13 TC15 TC15 TC14 TC14 TC13 COM COM NI_9214 fm Page 8 Monday November 1 2010 9 52 AM ...

Страница 9: ...ecessary for most applications Specifically leave COM unconnected for configurations in which all thermocouples are floating all thermocouples are referenced to the same common mode voltage or one thermocouple is referenced to a common mode voltage and all others are floating However for configurations in which two or more thermocouples are referenced to different common mode voltages connecting C...

Страница 10: ...the Specifications section for more information on screw terminal wiring 4 Insert the stripped end of the wire fully into the appropriate terminal Make sure no exposed wire extends past the screw terminal 5 Secure the connection by tightening the screw for the terminal Refer to the Specifications section for information on screw terminal torque 6 Route the wire through the NI TB 9214 opening 7 Rem...

Страница 11: ...ill any excess space in the opening 9 Reinstall the top cover on the NI TB 9214 and tighten the four captive screws to secure the cover and compress the foam pad Figure 3 Connecting Wires to the NI TB 9214 1 Top Cover 2 Foam Pad 3 Terminals 4 Strain Relief Holes 5 Ground Lug 1 2 4 5 3 NI_9214 fm Page 11 Monday November 1 2010 9 52 AM ...

Страница 12: ...ouple If COM is left floating the internal common mode voltage of the input circuitry is the average of all the inputs Refer to the Specifications section for more information about the common mode voltage The shield grounding methodology can vary depending on the application Refer to Figure 4 for an illustration of a typical shielding configuration Figure 4 Connecting a Shielded Thermocouple Inpu...

Страница 13: ...ecurely in place Do not overtighten the jackscrews Figure 5 Installing the NI TB 9214 NI 9214 Circuitry The NI 9214 passes 16 thermocouple input channels and one autozero channel through a differential filter Each channel is then multiplexed and sampled by a 24 bit analog to digital converter ADC Refer to Figure 6 for an illustration of the input circuitry for one channel of the NI 9214 NI_9214 fm...

Страница 14: ...s connected to the channel the current source forces a full scale voltage across the terminals You can configure the OTD circuit in software Refer to the software help for information about configuring the OTD circuit Visit ni com info and enter cseriesdoc for information about C Series documentation TC TC COM NI 9214 Input Impedance 10 MΩ 10 MΩ Open Thermocouple Detection Current Filtered Differe...

Страница 15: ...offset errors caused by bias current and lead resistance Refer to the Specifications section for more information about errors resulting from source impedance The channels share a common ground COM that is isolated from other modules in the system The NI 9214 common mode range is the maximum voltage allowed between any channel and COM The NI 9214 measures the common mode voltage level of each chan...

Страница 16: ...ly on the thermocouple type the accuracy of the thermocouple the temperature being measured the resistance of the thermocouple wires and the cold junction temperature Refer to the Temperature Measurement Accuracy section in the Specifications section for the module accuracy for each thermocouple type when connected to the NI 9214 For the best accuracy results keep temperature gradients across NI 9...

Страница 17: ...rors not only in absolute accuracy but also in the relative accuracy between channels Refer to the Specifications section for the cold junction compensation accuracy specifications The thermocouple accuracy specifications include the errors caused by the thermal gradient across the NI 9214 terminals for configurations with the NI 9214 terminals facing forward or upward Refer to the Temperature Mea...

Страница 18: ...rmocouple wires near hot or cold objects Minimize adjacent heat sources and air flow across the terminals If possible use the foam pad in the NI TB 9214 opening to restrict airflow around the terminals Keep the ambient temperature as stable as possible Make sure the module terminals are facing forward or upward Keep the module in a stable and consistent orientation Allow the thermal gradients to s...

Страница 19: ... disabling the OTD Refer to the software help for information about configuring the OTD circuit Visit ni com info and enter cseriesdoc for information about C Series documentation You can compensate for the OTD bias current if your application requires high accuracy high resistance thermocouple wires and the ability to detect open thermocouples Take a measurement with the OTD enabled and a second ...

Страница 20: ...pports a low power sleep mode Support for sleep mode at the system level depends on the chassis that the module is plugged into Refer to the chassis manual for information about support for sleep mode If the chassis supports sleep mode refer to the software help for information about enabling sleep mode Visit ni com info and enter cseriesdoc for information about C Series documentation Typically w...

Страница 21: ...aracteristics Number of channels NI 9214 16 thermocouple channels 1 internal autozero channel NI TB 9214 3 internal cold junction compensation channels ADC resolution 24 bits Type of ADC Delta Sigma Sampling mode Scanned Voltage measurement range 78 125 mV 1 The warm up time assumes the module is not in sleep mode is facing forward or upward and is in a constant ambient temperature National Instru...

Страница 22: ...ng Mode Conversion Time Per Channel Sample Rate All Channels High resolution 52 ms 0 96 S s High speed 735 s 68 S s If you are using fewer than all channels the sample rate might be faster The maximum sample rate 1 Conversion Time Number of Channels or 100 S s whichever is smaller Sampling faster than the maximum sample rate may result in the degradation of accuracy Including the autozero and cold...

Страница 23: ...eed mode at 0 60 Hz Channel to COM 70 dB COM to earth ground 120 dB Thermocouple signal input bandwidth High resolution mode 14 4 Hz High speed mode 80 Hz Open thermocouple settling time when switching OTD on off 6 s High resolution noise rejection at 50 and 60 Hz 65 dB Overvoltage protection 30 V between any two inputs Differential input impedance 20 M NI_9214 fm Page 23 Monday November 1 2010 9 ...

Страница 24: ...ctor 10 Gain error High resolution mode 0 03 typ at 25 C 0 15 max at 40 to 70 C High speed mode 0 04 typ at 25 C 0 16 max at 40 to 70 C Offset error High resolution mode 2 V typ 8 V max High speed mode 15 V typ 23 V max Offset error from source impedance with OTD enabled Add 0 2 V per when source impedance 50 NI_9214 fm Page 24 Monday November 1 2010 9 52 AM ...

Страница 25: ...rent OTD enabled 200 nA OTD disabled 400 pA OTD bias current drift 200 pA C max Cold junction compensation accuracy 23 5 C 0 25 C typ 20 to 70 C 0 6 C max 40 to 70 C 0 9 C max MTBF Contact NI for Bellcore MTBF or MIL HDBK 217F specifications NI_9214 fm Page 25 Monday November 1 2010 9 52 AM ...

Страница 26: ...0 04 C High speed mode Types J K T E 0 10 C Type N 0 11 C Types R S 0 36 C Type B 0 48 C 1 Measurement sensitivity represents the smallest change in temperature that a sensor can detect It is a function of noise The values assume the median of the full measurement range of the standard thermocouple sensor according to NIST Monograph 175 NI_9214 fm Page 26 Monday November 1 2010 9 52 AM ...

Страница 27: ...uracy for each thermocouple type under the following conditions Autozero is enabled Open thermocouple detection is disabled 0 V common mode voltage The tables include all measurement errors of the module and terminal block including RMS noise The tables do not include the accuracy of the thermocouple itself NI_9214 fm Page 27 Monday November 1 2010 9 52 AM ...

Страница 28: ...l 23 5 C 0 53 0 40 0 37 0 39 0 44 0 45 0 50 0 59 Max 20 to 70 C 1 70 1 24 1 00 1 16 1 44 1 58 1 89 2 33 Max 40 to 70 C 1 70 1 26 1 24 1 41 1 69 1 80 2 10 2 57 High Speed Typical 23 5 C 1 49 1 17 1 05 0 96 0 97 1 03 1 12 1 24 Max 20 to 70 C 2 79 2 12 1 76 1 78 1 96 2 24 2 59 2 99 Max 40 to 70 C 2 79 2 12 2 00 1 98 2 17 2 42 2 77 3 18 NI_9214 fm Page 28 Monday November 1 2010 9 52 AM ...

Страница 29: ...on Typical 23 5 C 0 50 0 36 0 37 0 42 0 52 0 60 0 69 0 85 Max 20 to 70 C 1 56 1 06 0 95 1 23 1 82 2 21 2 64 3 40 Max 40 to 70 C 1 56 1 10 1 20 1 49 2 08 2 48 2 93 3 71 High Speed Typical 23 5 C 1 17 0 86 0 87 0 95 1 11 1 25 1 41 1 70 Max 20 to 70 C 2 33 1 64 1 50 1 81 2 46 2 91 3 42 4 32 Max 40 to 70 C 2 33 1 66 1 76 2 08 2 72 3 19 3 71 4 64 NI_9214 fm Page 29 Monday November 1 2010 9 52 AM ...

Страница 30: ...tion Typical 23 5 C 0 54 0 37 0 33 0 33 0 37 0 43 0 49 Max 20 to 70 C 1 76 1 17 0 89 1 00 1 25 1 58 1 94 Max 40 to 70 C 1 76 1 17 1 04 1 17 1 42 1 74 2 11 High Speed Typical 23 5 C 1 25 0 88 0 77 0 69 0 69 0 78 0 90 Max 20 to 70 C 2 59 1 77 1 38 1 41 1 60 1 96 2 37 Max 40 to 70 C 2 59 1 77 1 53 1 53 1 77 2 13 2 55 NI_9214 fm Page 30 Monday November 1 2010 9 52 AM ...

Страница 31: ...ion Typical 23 5 C 0 81 0 61 0 54 0 55 0 57 0 59 0 60 0 67 Max 20 to 70 C 2 80 1 94 1 84 1 98 2 15 2 31 2 48 2 86 Max 40 to 70 C 2 80 1 94 1 84 1 98 2 15 2 31 2 48 2 86 High Speed Typical 23 5 C 4 50 3 30 2 74 2 61 2 54 2 47 2 42 2 49 Max 20 to 70 C 6 85 4 91 4 26 4 25 4 32 4 38 4 47 4 85 Max 40 to 70 C 6 85 4 91 4 27 4 25 4 32 4 38 4 47 4 85 NI_9214 fm Page 31 Monday November 1 2010 9 52 AM ...

Страница 32: ...400 C High Resolution Typical 23 5 C 0 94 0 61 0 51 0 46 0 43 0 45 Max 20 to 70 C 3 40 2 30 1 97 1 86 1 89 2 04 Max 40 to 70 C 3 45 2 34 2 00 1 88 1 89 2 05 High Speed Typical 23 5 C 7 36 4 56 3 46 2 88 2 55 2 33 Max 20 to 70 C 10 40 6 63 5 21 4 52 4 19 4 10 Max 40 to 70 C 10 45 6 66 5 23 4 54 4 21 4 11 NI_9214 fm Page 32 Monday November 1 2010 9 52 AM ...

Страница 33: ...ns and Specifications Figure 7 Thermocouple Error Typical High Res 23 5 C Measured Temperature C Measurement Error C 0 0 5 2 1 5 1 200 50 300 550 800 1050 1300 1550 1800 Type K Type T E Type R S Type J N Type B NI_9214 fm Page 33 Monday November 1 2010 9 52 AM ...

Страница 34: ...ons 34 ni com Figure 8 Thermocouple Error Max High Res 20 to 70 C Measurement Error C Measured Temperature C 0 2 1 4 3 200 50 300 550 800 1050 1300 1550 1800 Type K Type T E Type R S Type J N Type B NI_9214 fm Page 34 Monday November 1 2010 9 52 AM ...

Страница 35: ...x Physical Characteristics If you need to clean the module wipe it with a dry towel Note For two dimensional drawings and three dimensional models of the C Series module and connectors visit ni com dimensions and search by module number NI TB 9214 screw terminal wiring 20 to 30 AWG thermocouple wire with 51 mm 2 in of outer insulation and 5 1 mm 0 2 in of inner insulation stripped from the end NI_...

Страница 36: ...Between any two terminals 30 V max Isolation Channel to channel None Channel to earth ground Continuous 250 Vrms Measurement Category II Withstand 2 300 Vrms verified by a 5 s dielectric withstand test Measurement Category II is for measurements performed on circuits directly connected to the electrical distribution system This category refers to local level electrical distribution such as NI_9214...

Страница 37: ...urope Caution Do not connect the NI 9214 to signals or use for measurements within Measurement Categories III or IV Hazardous Locations U S UL Class I Division 2 Groups A B C D T4 Class I Zone 2 AEx nA IIC T4 Canada C UL Class I Division 2 Groups A B C D T4 Class I Zone 2 Ex nA IIC T4 Europe DEMKO Ex nA IIC T4 NI_9214 fm Page 37 Monday November 1 2010 9 52 AM ...

Страница 38: ...tions refer to the product label or the Online Product Certification section Electromagnetic Compatibility This product meets the requirements of the following EMC standards for electrical equipment for measurement control and laboratory use EN 61326 1 IEC 61326 1 Class A emissions Industrial immunity EN 55011 CISPR 11 Group 1 Class A emissions AS NZS CISPR 11 Group 1 Class A emissions FCC 47 CFR ...

Страница 39: ...s of applicable European Directives as follows 2006 95 EC Low Voltage Directive safety 2004 108 EC Electromagnetic Compatibility Directive EMC Online Product Certification To obtain product certifications and the Declaration of Conformity DoC for this product visit ni com certification search by module number or product line and click the appropriate link in the Certification column NI_9214 fm Pag...

Страница 40: ...ting shock IEC 60068 2 27 30 g 11 ms half sine 50 g 3 ms half sine 18 shocks at 6 orientations Environmental National Instruments C Series modules are intended for indoor use only but may be used outdoors if installed in a suitable enclosure Refer to the manual for the chassis you are using for more information about meeting these specifications Operating temperature IEC 60068 2 1 IEC 60068 2 2 40...

Страница 41: ...igning and manufacturing products in an environmentally responsible manner NI recognizes that eliminating certain hazardous substances from our products is beneficial to the environment and to NI customers For additional environmental information refer to the NI and the Environment Web page at ni com environment This page contains the environmental regulations and directives with which NI complies...

Страница 42: ...Directive 2002 96 EC on Waste and Electronic Equipment visit ni com environment weee Calibration You can obtain the calibration certificate and information about calibration services for the NI 9214 at ni com calibration Calibration interval 1 year ᄤֵᙃѻક ᶧ ࠊㅵ ࡲ Ё RoHS Ё ᅶ National Instruments ヺড়Ё ᄤֵᙃ ѻકЁ䰤ࠊՓ ᶤѯ ᆇ 䋼ᣛҸ RoHS Ǆ Ѣ National Instruments Ё RoHS ড়㾘ᗻֵᙃˈ䇋ⱏᔩ ni com environment rohs_chinaǄ For ...

Страница 43: ... also has offices located around the world to help address your support needs For telephone support in the United States create your service request at ni com support and follow the calling instructions or dial 512 795 8248 For telephone support outside the United States contact your local branch office Australia 1800 300 800 Austria 43 662 457990 0 Belgium 32 0 2 757 0020 Brazil 55 11 3262 3599 C...

Страница 44: ... to the appropriate location Help Patents in your software the patents txt file on your media or the National Instruments Patent Notice at ni com patents Korea 82 02 3451 3400 Lebanon 961 0 1 33 28 28 Malaysia 1800 887710 Mexico 01 800 010 0793 Netherlands 31 0 348 433 466 New Zealand 0800 553 322 Norway 47 0 66 90 76 60 Poland 48 22 328 90 10 Portugal 351 210 311 210 Russia 7 495 783 6851 Singapo...

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