National Instruments 9211A User Manual

National Instruments 9211A User Manual

4-channel, 24-bit thermocouple input devices

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USER GUIDE AND SPECIFICATIONS
USB-9211/9211A
4-Channel, 24-Bit Thermocouple Input Devices
Introduction
This user guide describes how to use the National Instruments
USB-9211/9211A devices and lists the specifications.
The NI USB-9211/9211A data acquisition device provides a USB interface
for four channels of 24-bit thermocouple inputs with integrated signal
conditioning.
The NI USB-9211 consists of two components: an NI 9211 module and a
USB-9161 carrier, as shown in Figure 1. The NI USB-9211A consists of
two components: an NI 9211 module and a USB-9162 carrier, as shown in
Figure 1.
NI 9211
USB-9161/9162
Figure 1. USB-9211/9211A Components
USB-9211/9211A

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Summary of Contents for National Instruments 9211A

  • Page 1 USER GUIDE AND SPECIFICATIONS USB-9211/9211A 4-Channel, 24-Bit Thermocouple Input Devices This user guide describes how to use the National Instruments USB-9211/9211A devices and lists the specifications. Introduction The NI USB-9211/9211A data acquisition device provides a USB interface for four channels of 24-bit thermocouple inputs with integrated signal conditioning.
  • Page 2: Safety Guidelines

    Caution Do not remove modules unless power has been switched off or the area is known to be nonhazardous. The USB-9211/9211A is not certified for use in hazardous locations. Caution USB-9211/9211A User Guide and Specifications ni.com...
  • Page 3: Safety Guidelines For Hazardous Voltages

    Device Carrier Software Support USB-9211 NI 9161 NI-DAQmx Base USB-9211A NI 9162 NI-DAQmx Examples are included with each software API. Refer to the corresponding software Getting Started Guide for more information. © National Instruments Corporation USB-9211/9211A User Guide and Specifications...
  • Page 4: Related Documentation

    Refer to Figure 3, while completing the following assembly steps: Make sure that no signals are connected to the NI 9211 module and the USB cable is not connected to the device. Remove the protective cover from the 15-pin DSUB connector. USB-9211/9211A User Guide and Specifications ni.com...
  • Page 5 Press firmly on the connector side of the NI 9211 module until the latches lock the module into place, as shown in Figure 4. Figure 4. Locking Module into Place Connect the USB cable to the assembled USB-9211/9211A. © National Instruments Corporation USB-9211/9211A User Guide and Specifications...
  • Page 6: Led Indicator

    Table 2. LED State/Device Status LED State Device Status Not lit Device not connected or in suspend. On, not blinking Device connected, but no module installed. Single-blink Operating normally. Double-blink Operating normally. Quadruple-blink Device error. Refer to ni.com/support USB-9211/9211A User Guide and Specifications ni.com...
  • Page 7 If you are using shielded wiring, connect one end of the shield to the COM terminal. Shield Thermocouple USB-9211/9211A TC– Figure 6. Connecting a Thermocouple Input Signal to the USB-9211/9211A © National Instruments Corporation USB-9211/9211A User Guide and Specifications...
  • Page 8 (>42.4 V , 60 VDC). Refer to Figure 7 while completing the following steps: Connect the leads to the screw terminal and secure with the strain relief. Finish by snapping the backshell around the connector. USB-9211/9211A User Guide and Specifications ni.com...
  • Page 9 Effects of Source Impedance on Voltage Measurement Accuracy The resistors shown in Figure 8 produce an input impedance at the terminals of the USB-9211/9211A. © National Instruments Corporation USB-9211/9211A User Guide and Specifications...
  • Page 10 15 °C or more than 35 °C, use this channel to read the offset error. The USB-9211 always has this channel enabled. Use NI-DAQmx to configure the behavior of the autozero channel for the USB-9211A. Refer to the NI-DAQmx Help, accessible from Start»All Programs»National Instruments»NI-DAQ, for more information. USB-9211/9211A User Guide and Specifications ni.com...
  • Page 11 Max over Temp Range with Autozero Max at Room Temp Range without Autozero Typ over Temp Range with Autozero 1000 1200 1400 1600 1800 Measured Temperature (°C) Figure 9. Type B Errors © National Instruments Corporation USB-9211/9211A User Guide and Specifications...
  • Page 12 Figure 10. Type E and T Errors Max over Temp Range with Autozero Max at Room Temp Range without Autozero Typ over Temp Range with Autozero –200 1000 1200 Measured Temperature (°C) Figure 11. Type J and N Errors USB-9211/9211A User Guide and Specifications ni.com...
  • Page 13: Cold-Junction Temperature Measurement Accuracy

    The thermal gradient generated across the terminals can cause the terminals of different channels to be at different temperatures, so the resulting measurement creates errors not only in absolute accuracy but also in the relative accuracy between channels. © National Instruments Corporation USB-9211/9211A User Guide and Specifications...
  • Page 14: Minimizing Thermal Gradients

    Common-mode rejection ratio (0 to 60 Hz) Channel-to-common ......95 dB Common-to-earth ground ....>170 dB Temperature measurement ranges ..Works over temperature ranges defined by NIST (J, K, R, S, T, N, E, and B thermocouple types) USB-9211/9211A User Guide and Specifications ni.com...
  • Page 15 0.06% typ (over temperature) 0.1% max (over temperature) Offset error (with autozeroing) ....15 µV typ, 20 µV max Gain error from source impedance..0.05 ppm per Ω source impedance due to input impedance © National Instruments Corporation USB-9211/9211A User Guide and Specifications...
  • Page 16: Power Requirements

    CAN/CSA-C22.2 No. 61010-1 For UL and other safety certifications, refer to the product label, or visit Note , search by model number or product line, and click the ni.com/certification appropriate link in the Certification column. USB-9211/9211A User Guide and Specifications ni.com...
  • Page 17: Hazardous Locations

    Storage temperature (IEC 60068-2-1 and IEC 60068-2-2) ..–40 to 85 °C Operating humidity (IEC 60068-2-56) ........10 to 90% RH, noncondensing Storage humidity (IEC 60068-2-56) ........5 to 95% RH, noncondensing © National Instruments Corporation USB-9211/9211A User Guide and Specifications...
  • Page 18: Electromagnetic Compatibility

    , search by model number or product line, and click the ni.com/certification appropriate link in the Certification column. Calibration You can obtain the calibration certificate for the USB-9211/9211A at ni.com/calibration Calibration interval .........1 year USB-9211/9211A User Guide and Specifications ni.com...
  • Page 19: Where To Go For Support

    Instruments trademarks. Other product and company names mentioned herein are trademarks or trade names of their respective companies. For patents covering National Instruments products, refer to the appropriate location: Help»Patents in your software, the patents.txt file on your CD, or ni.com/patents.

This manual is also suitable for:

9211Usb-9211aUsb-9211

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