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Digilent WebDAQ 504 User Manual

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WebDAQ 504 User's Guide
June 2024
About this User's Guide
What you will learn from this user's guide
This user's guide describes the WebDAQ 504 data acquisition device, the WebDAQ web interface, and lists device
specifications.
Where to find more information
Additional information about the WebDAQ Series of internet enabled data loggers is available on our website at
digilent.com. You can also contact Digilent with specific questions.
•
WebDAQ web interface: Open the Help window for information about using WebDAQ software.
•
WiFi adapters approved for use with the WebDAQ Series:
•
Tech support:
Digilent Forum
For international customers, contact your local distributor. Refer to the
website.
Hazardous voltages
Take the following precautions if you connect hazardous voltages to the WebDAQ 504. A hazardous
voltage is a voltage greater than 42.4 Vpk or 60 VDC to earth ground.
•
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 are properly insulated from human
contact.
Hazardous locations: The WebDAQ 504 is not certified for use in hazardous locations.
Other product and company names mentioned may be trademarks of their respective owners.
USB WiFi Adapters
International Distributors section
Copyright Digilent, Inc. All rights reserved.
1300 Henley Court
Pullman, WA 99163
www.digilent.com
on our
Page 1 of 26

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Summary of Contents for Digilent WebDAQ 504

  • Page 1 June 2024 About this User’s Guide What you will learn from this user’s guide This user’s guide describes the WebDAQ 504 data acquisition device, the WebDAQ web interface, and lists device specifications. Where to find more information Additional information about the WebDAQ Series of internet enabled data loggers is available on our website at digilent.com.

  • Page 2: Introducing The Webdaq 504

    WebDAQ 504 User’s Guide Introducing the WebDAQ 504 The WebDAQ 504 is part of the WebDAQ Series of Internet enabled data loggers. WebDAQ 504 is a vibration/acoustic data acquisition and logging device that provides the following features: • 4 simultaneously sampled analog inputs •...
  • Page 3 The link-local address is valid only for communications between the WebDAQ and the host PC to which it is connected. Copyright Digilent, Inc. All rights reserved. Page 3 of 26 Other product and company names mentioned may be trademarks of their respective owners.

  • Page 4: Connecting The External Power Adapter

    79 and up. Not recommended for use with earlier versions of the Edge browser. Not recommended for use with Internet Explorer. Copyright Digilent, Inc. All rights reserved. Page 4 of 26 Other product and company names mentioned may be trademarks of their respective owners.

  • Page 5: Configuring The Webdaq For Wireless Communication

    4. Disconnect the Ethernet cable from the LAN connection. Wait a few seconds and refresh the browser window. Changing to a wireless network may require a reboot Copyright Digilent, Inc. All rights reserved. Page 5 of 26 Other product and company names mentioned may be trademarks of their respective owners.

  • Page 6: Configuring The Network Router For Communication Across Networks

    Factory default settings. Parameter Specification IP address 192.168.0.101 Subnet mask 255.255.255.0 Gateway 192.168.0.1 DHCP setting DHCP + link-local enabled Copyright Digilent, Inc. All rights reserved. Page 6 of 26 Other product and company names mentioned may be trademarks of their respective owners.

  • Page 7: Functional Details

    Functional Details Functional block diagram Device functions are illustrated in the block diagram shown here. Figure 2. WebDAQ 504 functional block diagram Copyright Digilent, Inc. All rights reserved. Page 7 of 26 Other product and company names mentioned may be trademarks of their respective owners.

  • Page 8: Front Panel Components

    Connect up to four analog inputs to the BNC connectors (AI0+/AI0– to AI3+/AI3–). All analog inputs are simultaneously sampled at rates of up to 51.2 kS/s per channel. Copyright Digilent, Inc. All rights reserved. Page 8 of 26 Other product and company names mentioned may be trademarks of their respective owners.

  • Page 9: Analog Signal Connections

    IEPE sensor types. Analog signal connections You can connect ground-referenced or floating signal sources to the WebDAQ 504. Use a floating connection to minimize ground noise. If you make a ground-referenced connection between the signal source and the WebDAQ 504, make sure the voltage on the AI–...

  • Page 10: Analog Input Circuitry

    The WebDAQ 504 uses common-mode bias current to bias the current-liming diodes when IEPE current is turned off. When the WebDAQ 504 is using grounded signal sources, the current causes an error that is dependent on the AI– lead impedance and is approximately 50 ppm of range and 15 ppm of reading per Ω of AI– impedance. The common-mode bias current causes an error only with grounded sources and is not an issue with floating signal sources.

  • Page 11: Data Rates

    ) of the WebDAQ 504. The internal master calculated with the following equation: �� timebase frequency on the WebDAQ 504 is 13.1072 MHz. The data rates available on the WebDAQ 504 can be = (�� ÷ 256)/n, where n is any integer from 1 to 31. The data rate must remain within the appropriate data rate range.

  • Page 12: Alias-Free Bandwidth

    Alias-free bandwidth Any signal that appears in the alias-free bandwidth of the WebDAQ 504 is not an aliased artifact of signals at a higher frequency. The alias-free bandwidth is defined by the ability of the filter to reject frequencies above the stopband frequency, and it is equal to the data rate minus the stopband frequency.

  • Page 13: External Power Connector

    When a job is configured to log data to external media, pressing FUNC while the job is running will not eject the media. Copyright Digilent, Inc. All rights reserved. Page 13 of 26 Other product and company names mentioned may be trademarks of their respective owners.

  • Page 14: Led Status Indicators

    Update file cannot be located; insert media with update Blinking yellow file Update is successful; device will reboot in approximately ERROR Blinking green 5 seconds Copyright Digilent, Inc. All rights reserved. Page 14 of 26 Other product and company names mentioned may be trademarks of their respective owners.
  • Page 15 Use a self-powered hub if the current requirement of external media exceeds 500 mA. We recommend that you connect USB-powered hard drives before powering up the WebDAQ. Copyright Digilent, Inc. All rights reserved. Page 15 of 26 Other product and company names mentioned may be trademarks of their respective owners.

  • Page 16: Logging Data

    6. Slide out the circuit board with the front panel intact. 7. Remove jumper W1 from the specified location shown below. Copyright Digilent, Inc. All rights reserved. Page 16 of 26 Other product and company names mentioned may be trademarks of their respective owners.

  • Page 17: Replacing The Battery

    10. Secure the power connector with the nut and washer removed in step 4, to the power connector, attach the ground screw, Ethernet and power cables, and any USB devices. Copyright Digilent, Inc. All rights reserved. Page 17 of 26...

  • Page 18: Updating Webdaq Firmware

    In the web server’s Help, refer to the “Updating WebDAQ Firmware” topic or FAQ for instructions. Calibrating the hardware The Digilent Test department performs the initial factory calibration. Contact Digilent when calibration is required. The recommended calibration interval is one year.
  • Page 19 ± V ) must be 0 to 19, where: common-mode bias full-scale is the common-mode voltage applied to the WebDAQ 504. common-mode is the bias voltage of the IEPE sensor. bias is the full-scale voltage of the IEPE sensor. full-scale Range = 5.1 Vpk.

  • Page 20: Digital Input/Output

    100 kΩ pull-up resistor of that particular digital input/output bit to the internal 5 V supply. Careful consideration should be made when considering the external pull-up resistor value and the resultant pull-up voltage produced at the load. Copyright Digilent, Inc. All rights reserved. Page 20 of 26...

  • Page 21: Ethernet Connection

    (printed on the label on the underside of the device). Shared folders and mapped drives are reset when factory defaults are restored. Copyright Digilent, Inc. All rights reserved. Page 21 of 26 Other product and company names mentioned may be trademarks of their respective owners.

  • Page 22: Processor / Memory

    The USB ports are provided for connection to a mass storage device or approved WiFi adapter. Use the WebDAQ software to configure start and stop settings for jobs and schedules. Copyright Digilent, Inc. All rights reserved. Page 22 of 26...

  • Page 23: Push Buttons

    Device will always be on if power is applied Refer to this circuit board image for the location of the W1 jumper. Copyright Digilent, Inc. All rights reserved. Page 23 of 26 Other product and company names mentioned may be trademarks of their respective owners.
  • Page 24 If using a different supply, ensure that it has a positive center pin. Copyright Digilent, Inc. All rights reserved. Page 24 of 26 Other product and company names mentioned may be trademarks of their respective owners.

  • Page 25: Shock And Vibration

    None WebDAQ operation is intended for indoor use only, but may be used outdoors if installed in a suitable enclosure. Copyright Digilent, Inc. All rights reserved. Page 25 of 26 Other product and company names mentioned may be trademarks of their respective owners.

  • Page 26: Signal Connectors

    MAINS building installations of Measurement Categories CAT II, CAT III, or CAT IV. Caution! Do not connect the WebDAQ 504 to signals or use for measurements within Measurement Categories II, III or IV.