MC WebDAQ 316 User Manual

Internet enabled thermocouple data logger
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WebDAQ 316
Internet Enabled Thermocouple Data Logger
July 2017. Rev 1
© Measurement Computing Corporation
User's Guide

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Summary of Contents for MC WebDAQ 316

  • Page 1 WebDAQ 316 Internet Enabled Thermocouple Data Logger User's Guide July 2017. Rev 1 © Measurement Computing Corporation...
  • Page 2 Measurement Computing Corporation products are not designed with the components required, and are not subject to the testing required to ensure a level of reliability suitable for the treatment and diagnosis of people. HM WebDAQ 316...
  • Page 3: Table Of Contents

    Conventions in this user's guide ......................... 5 Where to find more information ......................... 5 Hazardous voltages ............................. 5 Hazardous locations ................................5 Chapter 1 Introducing the WebDAQ 316 ......................6 Powered by Raspberry Pi ® ..........................6 Integrated operating system and web service ..................... 6 Ethernet interface ..............................
  • Page 4 WebDAQ 316 User's Guide Chapter 4 Specifications ............................18 Thermocouple input ............................18 Temperature measurement accuracy ........................ 19 Digital input/output............................21 Network ................................22 Ethernet connection .................................22 Network interface ................................22 Network factory default settings ............................22 Processor / Memory ............................22 USB ports .................................
  • Page 5: Preface

    Caution! Ensure that hazardous voltage wiring is performed only by qualified personnel adhering to local electrical standards. Do not mix hazardous voltage circuits and human-accessible circuits on the same device. Make sure that devices and circuits connected to the WebDAQ 316 are properly insulated from human contact. Hazardous locations...
  • Page 6: Introducing The Webdaq 316

    WebDAQ Series devices are designed with an integrated operating system and web interface. You communicate with the device over a network connection using the web interface opened in a web browser. Mobile support – access the WebDAQ 316 from any device with a web browser, such as a phone or tablet ...
  • Page 7: Functional Block Diagram

    Introducing the WebDAQ 316 Functional block diagram Device functions are illustrated in the block diagram shown here. Figure 1. WebDAQ 316 functional block diagram Unpacking As with any electronic device, you should take care while handling to avoid damage from static electricity.
  • Page 8: Setting Up The Webdaq 316

    Connecting to a network with DHCP enabled Connect one end of the Ethernet cable to the connector on the WebDAQ 316 rear panel, and connect the other end to a 10Base-T or 100Base-TX compatible Ethernet port, hub, or switch.
  • Page 9: Accessing The Webdaq Web Interface

    Incorrect settings can significantly disrupt a network. In the following procedure, the WebDAQ 316 is installed on the host LAN, the computer is installed on the client LAN, and it is assumed that you have successfully connected the device to a local network.
  • Page 10: Security

    WebDAQ 316 User's Guide Setting up the WebDAQ 316 Configure the firewall/router to forward an unused port to port 80 on the WebDAQ 316 at the IP address configured for the device. Note the static IP address assigned to the router – this is referred to as the WAN address.
  • Page 11: Functional Details

    Chapter 3 Functional Details Front panel components Front panel components are shown in Figure 3. Detachable screw terminal  Detachable spring terminal  Figure 3. Front panel Screw terminal Spring terminal Screw terminal Connect up to four digital I/O lines ( ) to the detachable screw terminal.
  • Page 12: Spring Terminal

    The WebDAQ 316 supports type J, K, S, R, B, E, T, N thermocouples (TC), and provides overvoltage protection between any two inputs. A typical thermocouple connection is shown in Figure 6.
  • Page 13: Rear Panel Components

    Use the web interface to safely unmount removable media, when present. When removable media is plugged into the WebDAQ 316, the operating system opens it for writing. To safely remove the media, you must unmount it first.
  • Page 14: Led Status Indicators

    CONFIG RESET When pressed, the default settings are written to the device and the WebDAQ 316 is rebooted. Refer to page 10 for a list of the default settings that are restored.
  • Page 15: Ground Connector

    The two high-speed USB ports can be used for connections to a mass storage device. When removable media is plugged into the WebDAQ 316, the operating system opens it for writing. Use the button (page 13) or web interface to unmount the USB device before removing.
  • Page 16: Replacing The Battery

    WebDAQ 316 terminals for configurations with the terminals facing forward or upward. Auto zero channel The WebDAQ 316 has an internal auto zero channel which can be subtracted from each thermocouple reading to compensate for offset errors. Use the web interface to enable auto zero. WebDAQ 316 specifications assume that auto zero is enabled and applied to every sample.
  • Page 17: Recovering From A Failed Update

    If the update process is not successful, perform the following procedure to update the software image: Press the button to power down the WebDAQ 316. If the device is not responsive, press the Power Power button for 4 seconds to force the device to power off. Power down the device; unsaved changes may be lost.
  • Page 18: Specifications

    Chapter 4 Specifications All specifications are subject to change without notice. Typical for 0 °C to 50 °C unless otherwise specified. Thermocouple input Table 1. Thermocouple input specifications Parameter Condition Specification 16 thermocouple channels Number of channels 1 internal auto zero channel 1 internal cold-junction compensation channel ADC resolution 24 bits...
  • Page 19: Temperature Measurement Accuracy

    Type R, S: <2.8 °C The following figures show the errors for each thermocouple type when connected to the WebDAQ 316 with auto zeroing performed. The figures display the maximum error over a full temperature range, and the typical error at room temperature. The figures account for gain errors, offset errors, differential and integral nonlinearity, quantization errors, noise errors, 50 Ω...
  • Page 20 WebDAQ 316 User's Guide Specifications Thermocouple Type K Errors Thermocouple Types T and E Errors Thermocouple Type B Errors...
  • Page 21: Digital Input/Output

    WebDAQ 316 User's Guide Specifications Thermocouple Types R and S Errors Digital input/output Table 3. Digital input/output specifications Parameter Specification Digital type CMOS (Schmitt trigger) input / open drain output Number of I/O One port of 4 bits Configuration Each bit can be independently configured for input or output...
  • Page 22: Network

    WebDAQ 316 User's Guide Specifications Network Ethernet connection Table 4. Ethernet connection specifications Parameter Specification 100 Base-TX Ethernet type 10 Base-T Communication rates 10/100 Mbps, auto-negotiated Connector RJ-45, 8 position Cable length 100 meters (328 feet) max Additional parameters HP Auto-MDIX support Network interface Table 5.
  • Page 23: Usb Ports

    WebDAQ 316 User's Guide Specifications USB ports Table 8. USB specifications Parameter Specification Number of USB ports USB device type USB 2.0 (high-speed) Device compatibility USB 1.1, USB 2.0, USB 3.0 Note 3: The USB ports are provided for connection to a mass storage device.
  • Page 24: Push Buttons

    WebDAQ 316 User's Guide Specifications Table 11. LED specifications – software update mode State Description All LEDs Solid yellow Software update is starting. 1. POWER Blinking yellow Software update is running. 2. STATUS Blinking green Update file is located; device is being updated.
  • Page 25: Mechanical

    Maximum altitude 2,000 m (6,562 ft) Pollution Degree Note 5: WebDAQ 316 operation is intended for indoor use only, but may be used outdoors if installed in a suitable enclosure. Safety voltages Connect only voltages that are within the limits specified in this table.
  • Page 26: Screw Terminal

    WebDAQ 316 User's Guide Specifications Screw terminal Table 19. Screw terminal pinout Terminal Terminal Label Label Digital ground DIO2 Digital bit 2 DIO0 Digital bit 0 DIO3 Digital bit 3 DIO1 Digital bit 1 Digital ground Spring terminal Table 20. Spring terminal pinout...
  • Page 27: Eu Declaration Of Conformity

    Test Report Number: EMI7018.17 Measurement Computing Corporation declares under sole responsibility that the product WebDAQ 316 is in conformity with the relevant Union Harmonization Legislation and complies with the essential requirements of the following applicable European Directives: Electromagnetic Compatibility (EMC) Directive 2014/30/EU...
  • Page 28 Measurement Computing Corporation NI Hungary Kft 10 Commerce Way H-4031 Debrecen, Hátar út 1/A, Hungary Norton, Massachusetts 02766 Phone: +36 (52) 515400 (508) 946-5100 Fax: +36 (52) 515414 Fax: (508) 946-9500 http://hungary.ni.com/debrecen E-mail: info@mccdaq.com www.mccdaq.com...

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