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Lord MicroStrain WSDA-2000 User Manual

Wireless sensor data aggregator
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LORD USER MANUAL
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WSDA
-2000
Wireless Sensor Data Aggregator

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  • Page 1 LORD USER MANUAL ® WSDA -2000 Wireless Sensor Data Aggregator...
  • Page 2 LORD Sensing Systems 459 Hurricane Lane Suite 102 Williston, VT 05495 United States of America Phone: 802-862-6629 Fax: 802-863-4093 9:00 AM to 5:00 PM (Eastern Time US & Canada) http://www.microstrain.com sensing_support@LORD.com sensing_sales@LORD.com Document 8500-0090 Revision A Subject to change without notice.

  • Page 3: Table Of Contents

    ® WSDA -2000 User Manual Table of Contents Wireless Sensor Network Overview Gateway Overview 2.1 Gateway Components 2.2 Gateway Interface System Operation 3.1 Software Installation 3.2 System Connections 3.3 Gateway Operation 3.4 Gateway Communication 3.5 Gateway Settings 3.5.1 Access WSDA Control Panel 3.5.2 Change Transmit Power 3.5.3 Change Frequency Gateway Menu Navigation...
  • Page 4 ® WSDA -2000 User Manual 4.3.3 Time Options 4.3.4 Reboot 4.3.5 Operating System (OS) Upgrade 4.3.6 Change Password Remote Connectivity Using the Beacon 6.1 System Bandwidth in Synchronized Sampling 6.2 Synchronized Sampling with Multiple Gateways Sensor Node Access 7.1 Connect to Nodes 7.1.1 Automatic Node Discovery on Same Frequency 7.1.2 Automatic Node Discovery on Different Frequency 7.1.3 Manually Add Node...
  • Page 5 ® WSDA -2000 User Manual 9.1.1 Range Test 9.2 Multi-port Connector Interface Troubleshooting 10.1 Troubleshooting Guide 10.2 Communications Ports in Windows® Parts and Configurations 11.1 Standard Models 11.2 Wireless System Equipment Specifications 12.1 Physical Specification 12.2 Operating Specifications 12.3 Radio Specifications Safety Information 13.1 Disposal and Recycling References...

  • Page 6: Wireless Sensor Network Overview

    ® WSDA -2000 User Manual Wireless Sensor Network Overview The LORD Sensing Wireless Sensor Network is a high- speed, scalable, sensor data acquisition and sensor networking system.  Each system consists of wireless sensor interface nodes, a data collection gateway, and full- featured user software platforms based on the LORD Sensing Lossless Extended Range Synchronized (LXRS) and LXRS+ data communications protocols. ...

  • Page 7: Gateway Overview

    LORD Sensing LXRS and LXRS+ data communications protocols. The WSDA-2000 utilizes Ethernet and USB interfaces to transfer data from the wireless nodes to a host computer for viewing, analysis, and storage. It also provides a CAN data ouput.

  • Page 8: Gateway Components

    User Manual 2.1 Gateway Components The WSDA-2000 can be purchased individually or in a starter kit. The kit includes everything required to operate the WSDA-2000 including a removable external antenna, a power supply, and cables for interfacing with the host computer or network. For a complete list of available configurations,...

  • Page 9: Gateway Interface

    User Manual Gateway Interface The WSDA-2000 interfaces include a power input jack , a power on/off switch, an antenna connector for attaching the gateway antenna, an Ethernet jack, a multi-use (multi-port) connector, and a USB port.The indicators on the WSDA-2000 include several device and data status indicators, and a power indicator.

  • Page 10: System Operation

    User Manual System Operation The WSDA-2000 is an advanced gateway that aggregates LORD Sensing wireless data and interfaces LORD Sensing wireless networks to SensorCloud™ and data acquisition computers. LORD Sensing's SensorConnect software program is available for data acquisition from the wireless sensor network.

  • Page 11: System Connections

    ® WSDA -2000 User Manual 3.2 System Connections To acquire sensor data the following components are needed: a LORD Sensing wireless sensor node, a LORD Sensing data gateway, and a host computer with access to the data acquisition software. The sensor, node, gateway, and software selection are application-dependent, but the basic interfaces are the same.

  • Page 12: Gateway Operation

    3.4 Gateway Communication a. Power is applied to the gateway through the power jack on the back of the WSDA-2000. The Ethernet jack is connected to the network using a CAT5 or better Ethernet cable.
  • Page 13 ® WSDA -2000 User Manual Figure 6 - Gateway Communication...

  • Page 14: Gateway Settings

    ® WSDA -2000 User Manual 3.5 Gateway Settings 3.5.1 Access WSDA Control Panel The WSDA Control Panel menu provides access to gateway network settings, time synchronization options, CAN output configuration, and more. To view the WSDA Control Panel, from the Devices window, highlight the base station and select the WSDA Control Panel tile.
  • Page 15 ® WSDA -2000 User Manual Figure 8 - Control Panel Menus a. General - This category includes menu selections for information about the gateway's iden- tity and time settings (About) and the sensor nodes it currently has data for in memory (Node List).

  • Page 16: Change Transmit Power

    ® WSDA -2000 User Manual 3.5.2 Change Transmit Power From the Base Station, select Configure > Transmit Power for a drop down menu of five power options ranging from 0 dBm to 20 dBm. Figure 9 - Transmit Power Setting 3.5.3 Change Frequency There are 16 available frequency channels between 2.405 and 2.480 GHz.
  • Page 17 ® WSDA -2000 User Manual NOTE Setting the transmit frequency using SensorConnect is temporary for Ethernet gateways and will revert back to the frequency setting selected in the gateway Control Panel when the gateway is powered off or rebooted (see Gateway Settings on page 14 for how to change the frequency setting in Control Panel)

  • Page 18: Gateway Menu Navigation

    ® WSDA -2000 User Manual Gateway Menu Navigation 4.1 Gateway Information The General category provides information about the gateway identity, the wireless nodes it serves, and its current time settings. These are informational only, and no user adjustments may be made in these menus.
  • Page 19 OS Version: a numeric identifier used to identify the WSDA-2000 OS (Operating System) Version. The OS is the on-board software that operates the WSDA-2000. All gateways are shipped with the current OS version. As new features are added, OS updates are available from LORD Sensing...

  • Page 20: Node List

    ® WSDA -2000 User Manual System Up-time: the elapsed time since the gateway was last powered on and booted up. The system up-time will be zeroed when the gateway power is cycled or it is rebooted from the Tools > Reboot menu.

  • Page 21: Data Options Menu

    The Data category provides data handling options such as selecting which data is sent to the CAN J1939 bus, uploaded to SensorCloud™, and downloaded to a host computer. Data can also be cleared from the WSDA-2000 internal memory. Table 3 - Data Menus provides a summary of the menus under the Data category.

  • Page 22: Can J1939 Output

    ® WSDA -2000 User Manual 4.2.1 CAN J1939 Output In addition to saving locally or uploading through an Ethernet connection, data acquired from sensor nodes can also be pushed onto a CAN J1939 bus for reactive command and control of external devices and other applications.
  • Page 23 CAN bus bandwidth limitations. Using the broadcast message data distribution method and reducing the sensor data that is sent to the bus can also be effective. The Source setting refers to where the data is coming from, as in, how the WSDA-2000 will be Figure 14 - Data Source Setting...
  • Page 24 (which is displayed to the right of the Source selection menu). This name provides the host CAN bus with information about the device that determines its data priority relative to other devices on the Table 5 - WSDA-2000 J1939 Values bus (...
  • Page 25 ® WSDA -2000 User Manual allowed (0xFF00 through 0xFFFF). Additionally, the user must also define which data values the WSDA should forward onto the bus for each given PGN and under which conditions. To define which data to send for a given PGN, the user must specify the address of the wireless node producing the data and the name of each data stream from that node which should be forwarded onto the bus.
  • Page 26 ® WSDA -2000 User Manual To enter the broadcast messages in the J1939 menu, type in the appropriate field. When the PGN field is selected, the Payload field will appear. If all values for the message are to be included, leave the Ch.
  • Page 27 ® WSDA -2000 User Manual Once created, save the text file and then upload it to the gateway by clicking the Browse for File button in the J1939 menu. Navigate to the file, click OK, and then click the Submit button to save the configuration ( Figure 16 - Upload Configuration File Figure 16 - Upload Configuration File...
  • Page 28 ® WSDA -2000 User Manual Broadcast Messages: With this message format, the receiving system will need to be programmed to understand the user defined payloads for each PGN sent. Specifically, the user will need to inform the receiving system which order the data values are stored in the payload and how many bytes each data value is made up of.

  • Page 29: Data Alias Definitions

    ® WSDA -2000 User Manual 4.2.2 Data Alias Definitions The names of data the sensor network produces and the WSDA can push onto the CAN bus are defined below. All data is in big-endian format unless otherwise noted. Some data channels have fixed sizes or depend on the node settings.
  • Page 30 ® WSDA -2000 User Manual Value Definition Applicable Packet LDC (v1,v2), Syncrhonized Sampling (v1,v2), tick Packet tick number Derived LDC (v1),Derived Syncrhonized Samp- ling (v1) Syncrhonized Sampling (v1,v2),Derived Syn- crhonized Sampling (v1), Asynchronous (v1), noderssi RSSI value of node Asynchronous Digital and Analog (v1), Structural Health (v2), Diagnostic (V1) Table 7 - Data Channel Definitions...

  • Page 31: Sensorcloud™ Upload Filter

    ® WSDA -2000 User Manual 4.2.3 SensorCloud™ Upload Filter By default, the WSDA - 2000 uploads all sensor data stored in the gateway memory to SensorCloud™. The Upload Filter function allows the user to select the data to be uploaded. Figure 17 - Data Upload Filter The Upload Filter menu describes how to set up a filter.

  • Page 32: Wsda Data Downloader Calibration Coefficients

    ® WSDA -2000 User Manual 4.2.4 WSDA Data Downloader Calibration Coefficients The Calibration feature allows the user to specify coefficients for converting between engineering units with a linear relationship, and to correct for sensor biases in sensor data saved in the gateway memory.
  • Page 33 ® WSDA -2000 User Manual The conversion formula assumes a linear relationship between the original units (such as A/D bits) and new engineering units (such as ), and it is expressed mathematically as y=mx+b , where y is the engineering units at a given point (measurement), m is the slope of the line that represents the linear ratio, x is the original unit value at a given point, and b is a unit conversion offset (in the case of unit conversions) or the fixed zero load offset of the sensor (in the case of measurement calibration coefficients).

  • Page 34: Clear Stored Data

    Clear All Data button and the data will be erased. Figure 19 - Clear Data Menu 4.3 Gateway Tools Menu The Tools menus provide the user a means to configure, troubleshoot, and update the WSDA-2000 settings. Table 9 - Tools Menus provides a summary of the menus under the Tools category.

  • Page 35: Diagnostics

    User Manual 4.3.1 Diagnostics The diagnostics feature is used to troubleshoot the WSDA-2000. The diagnostics window displays a report from the gateway internal log file. The log records the diagnostic checks from three possible sources of error: the timing engine, SensorCloud™ data upload, and the data logger. These diagnostic checks are performed once at every power up and then periodically as the gateway is in on.

  • Page 36: Configuration

    User Manual 4.3.2 Configuration The Configuration menu allows the user to set parameters associated with WSDA-2000 operation. The settings include configuring the communication settings, enabling and disabling operating sequences, changing the node synchronization beacon state, and changing the gateway wireless node communication frequency.
  • Page 37 ® WSDA -2000 User Manual users on the network from accessing the data stream . If Live Connect is disabled it will not be available for connecting to SensorConnect unless done remotely through SensorCloud™ ( Remote Connectivity on page 44 ).
  • Page 38 7. Save and exit the menus. Setup is complete. J1939: The J1939 CAN output allows sensor data to be pushed out to a user-designed J1939 CAN bus through the WSDA-2000 multi-port connector. For more information see CAN J1939 Output on page 22 .

  • Page 39: Time Options

    During normal operation, the WSDA-2000 synchronizes time from enabled time sources starting with the most accurate. On boot-up, the WSDA-2000 will try to get a new time. If it is unable to, it will check to see if it already has a non-expired time from the first source. If not it will move on to the next source.
  • Page 40 Manual time synchronization utilizes a time entered by the user. Enter the time in the System Time field, and select the Set System Time button. Last Known synchronizes to the last time recorded on the WSDA-2000. This could be from the internal Real Time Clock (RTC) or a file on the gateway.

  • Page 41: Reboot

    4.3.4 Reboot The Reboot option allows the user to restart and reinitialize the gateway without cycling power. To reboot the WSDA-2000, select the Reboot button. A three stage boot-up sequence will start, as Table 10 - Reboot Indicators described in .

  • Page 42: Operating System (Os) Upgrade

    User Manual 4.3.5 Operating System (OS) Upgrade Periodically, new versions of the WSDA-2000 operating system will be released to add features or make other updates to the system. On the recommendation of LORD Sensing Technical Support, gateways can be upgraded to the latest available operating system to take advantage of these new features or to correct operating issues. Updates may be found on the LORD Sensing website (...

  • Page 43: Change Password

    -2000 User Manual 4.3.6 Change Password The Change Password feature is used to change the username and the password required at log-in to the WSDA-2000 Control Panel. The default username and password are: a. Login: wsda b. Password: wsda Enter the current username and password and then the new password twice and select Submit.

  • Page 44: Remote Connectivity

    User Manual Remote Connectivity Some SensorCloud™ data plans allow remote access to the WSDA-2000 through the SensorCloud™ web interface. This allows access to the gateway Control Panel (including data downloading) and to Live Connect and SensorConnect for remote configuration of gateways and nodes. Data downloading from the gateway memory is also available in this way.
  • Page 45 WSDA -2000 User Manual Download Data Remotely 1. Download the WSDA Data Downloader from the WSDA-2000 product page at: http://www.microstrain.com/wireless/WSDA-1500 >Downloads > Software. 2. Connect to the gateway Control Panel as described above. 3. Copy the URL from the browser address bar when in Control Panel (...
  • Page 46 ® WSDA -2000 User Manual Figure 28 - Remote Live Connect Connection...

  • Page 47: Using The Beacon

    ® WSDA -2000 User Manual Using the Beacon In synchronized sampling, the beacon feature is used to coordinate sampling and transmission timing between multiple nodes. The primary purpose is to avoid data collision, guarantee timing between samples from different nodes, and to time-stamp the data. The beacon cannot be used in any another sampling mode.

  • Page 48: System Bandwidth In Synchronized Sampling

    ® WSDA -2000 User Manual 6.1 System Bandwidth in Synchronized Sampling When using synchronized sampling all nodes in the wireless network are queried and given time slots of various lengths based on their configuration (# of channels, sample rate, etc.). Nodes will only transmit data during these time slots, therefore eliminating over-the-air data collisions.

  • Page 49: Sensor Node Access

    7.1.1 Automatic Node Discovery on Same Frequency If the base and node are on the same operating frequency, the node will populate below the Base Station listing when powering on the WSDA-2000. Figure 30 - Node Discovered On Same Frequency 7.1.2 Automatic Node Discovery on Different Frequency...
  • Page 50 ® WSDA -2000 User Manual Highlight the new node being added and select Move Node to Frequency (#). Figure 32 - Move Node...

  • Page 51: Manually Add Node

    ® WSDA -2000 User Manual 7.1.3 Manually Add Node Adding a node manually requires entering the node address and its current frequency setting. Figure 33 - Add Node By Address If the node was successfully added, two confirmation messages will appear and it will be listed under the Base Station.
  • Page 52 ® WSDA -2000 User Manual If the node failed to be added, a failure message will appear. This means the node did not respond to the base station which could indicate the node is not in idle mode or it may be on another frequency.

  • Page 53: Configure Node

    ® WSDA -2000 User Manual Configure Node Node settings are stored to non-volatile memory and may be configured using SensorConnect. To access the node configuration menu, under Devices select the node and then the Configure tile. The configuration menus show the channels and configuration options available for the type of node being used.
  • Page 54 ® WSDA -2000 User Manual To sample multiple nodes as a group, select the Base Station and then the Sampling Network tile. As a group, they will all be set to the same sampling mode. When the Base Station is selected, all the nodes will appear in a list with a check mark to the left, all of the nodes checked off will be included in the sampling.
  • Page 55 ® WSDA -2000 User Manual If Synchronized is deselected, the node will not require a beacon time source and will transmit a data transmission for each measurement sweep. The user should deselect Synchronized if, either low latency, or the lowest possible power at slow sample rates, is required. Lossless - The user can achieve near lossless data collection in most environments through the use of data buffering, radio acknowledgments, and retransmissions.
  • Page 56 ® WSDA -2000 User Manual the beacon, this setting will keep the gateway's beacon. Apply Only: Saves the settings to memory and not start the network.
  • Page 57 ® WSDA -2000 User Manual 4. Stop Sampling To stop all (or selected) nodes on a network, select the Set Nodes to Idle tile and indicate with a check mark which nodes are to be set to idle mode. If the Broadcast option is enabled, a signal to all nodes (including unsolicited nodes) will be sent out to request they return to idle.

  • Page 58: Viewing Data

    ® WSDA -2000 User Manual Viewing Data 8.1 SensorCloud Data acquired through SensorConnect is automatically saved on the host computer. Saved data can be uploaded to SensorCloud. Ethernet gateways provide the option to automatically port the data to SensorCloud during data acquisition for near real-time display and aggregation. Ethernet gateways can also be configured to save data locally to internal memory for future upload to the host computer or SensorCloud.
  • Page 59 ® WSDA -2000 User Manual Figure 40 - SensorCloud Menu Views Device - The device list shows every Ethernet gateway and API device associated with the SensorCloud account, including owned, shared, and demo devices. This view provides links to each device’s SensorCloud subscription plan, configuration options, and a summary of last communications and data transactions.
  • Page 60 ® WSDA -2000 User Manual Figure 41 - SensorCloud Data View ® Figure 42 - MathEngine View...

  • Page 61: Sensorconnect

    ® WSDA -2000 User Manual Figure 43 - FFT Graph in SensorCloud 8.2 SensorConnect 8.2.1 Using Dashboards and Widgets Collected data is viewed on the Data page through the creation of dashboards and widgets. Think of dashboards as individual pages and widgets as an illustration on the page. Create multiple data widgets on each dashboard to display sampled data as a time-series graph, text chart, or a simple gauge that only displays the most current reading.

  • Page 62: Navigating Graphs

    ® WSDA -2000 User Manual 8.2.2 Navigating Graphs Use the mouse along with the shift and control keys inside the graph window to adjust the data view. Control Action Mouse wheel Zoom in/out on x-axis Shift + mouse wheel Zoom in/out on y-axis Mouse double-click Zoom to extends Shift + mouse left-click, drag left/right...

  • Page 63: Time Series Widget Menu

    ® WSDA -2000 User Manual 8.2.4 Time Series Widget Menu The Time Series Widget menu has two features to help optimize sensor data collection for export to a .csv file. Snap to Latest captures the most recent data and  Zoom isolates specific events from a larger data sample ( see Exporting Data Files on page 63 Figure 46 - Time Series Widget Menu...

  • Page 64: Using The Data Downloader

    ® WSDA -2000 User Manual 8.3 Using the Data Downloader To view data using the Data Downloader, go to: http://www.microstrain.com/wireless/gateways, select the product > Downloads > WSDA Data Downloader, run the application, and open the window. Figure 48 - Data Downloader Log-in Window To find the WSDA URL, select the WSDA Control Panel tile from the Devices window in SensorConnect™.
  • Page 65 ® WSDA -2000 User Manual Figure 50 - WSDA URL Copy and past the WSDA URL into the Data Downloader, enter WSDA Login and Password ( Gateway Settings on page 14 ), and select "Connect to WSDA". Figure 51 - Data Downloader Log in Window...
  • Page 66 ® WSDA -2000 User Manual Figure 52 - Data Downloader Menu The user may select to include all channels, or mark individual channels to include in the data download, apply the calibration coefficients ( See WSDA Data Downloader Calibration Coefficients on page 32 ), and/or to combine all of the sensors into a single .csv file.
  • Page 67 ® WSDA -2000 User Manual A green bar in the data downloader status window shows the progress and completion of the download process. The saved CSV file is named WSDA_serial number_node address_timestamp by default. Figure 54 - Data Download Complete Upload the CSV file to SensorCloud™...

  • Page 68: Gateway Installation

    User Manual Gateway Installation 9.1 Installation Recommendations The WSDA-2000 is rated for indoor use only, unless housed in a ruggedized outdoor enclosure.  The gateway has two mounting tabs with holes for fastening ( Figure 55 - Gateway Installation ). It can be mounted in any orientation, but it is recommended that it is mounted in a way that optimizes the wireless communications, typically with the antenna pointing upward.
  • Page 69 ® WSDA -2000 User Manual NOTE In the event of communication difficulties, it may be necessary to disable WIFI on the host computer, or use a USB extender when collecting data. The best method for ensuring optimal radio communication is to conduct an RF survey of the installation site.

  • Page 70: Range Test

    ® WSDA -2000 User Manual 9.1.1 Range Test After establishing communication between node and gateway, use the range test feature in SensorConnect to monitor the signal strength and to optimally position the nodes, gateway, and antennae for installation. Maximum achievable range is determined by the gateway and node power settings (found in the device Configure menu) and is highly dependent on the physical environment surrounding the devices.

  • Page 71: Multi-Port Connector Interface

    User Manual 9.2 Multi-port Connector Interface The WSDA-2000 multi-port connector is currently only used for CAN J1939 output connections and customized RS232 options, such as for use with LORD Sensing inertial sensors. The remaining are used during manufacturing, or are reserved for future use. For mating connector information and pre-...

  • Page 72: Troubleshooting

    ® WSDA -2000 User Manual Troubleshooting 10.1 Troubleshooting Guide...
  • Page 73 ® WSDA -2000 User Manual Possible cause and recommended solution 1.1 node or gateway power is off The status indicator LED on the device may be off.  Turn the 1. POWER device on, and the status indicator LED should illuminate. gateway or node does 1.2 external power is off or miswired not turn on...
  • Page 74 ® WSDA -2000 User Manual Possible cause and recommended solution If the node status indicator shows the node booting in a mode other than the normal boot mode, it can be bypassed by cycling the node power rapidly three times, then leaving it on for normal power up.
  • Page 75 ® WSDA -2000 User Manual Possible cause and recommended solution 3.5 sensor channel not configured correctly Verify that the sensor is configured on the correct channel and has been enabled for data acquisition.  3.6 sensor calibration is invalid External sensors come with a factory calibration value that is entered during configuration.

  • Page 76: Communications Ports In Windows

    ® WSDA -2000 User Manual ® 10.2 Communications Ports in Windows Serial gateways (including USB gateways) have either a standard serial or virtual communications port ® ® in Windows . Windows Device Manage can be used to determine what communication port the gateway is connected to.
  • Page 77 ® WSDA -2000 User Manual 3. In Device Manager, expand the view for Ports (COM and LPT). Active COM ports will appear on this list with the COM port number. If no port is listed, the port is not recognized by the computer, and no gateway communication can be established.
  • Page 78 ® WSDA -2000 User Manual Technical Support There are many resources for product support found on the LORD Sensing website, including technical notes, FAQs, and product manuals. http://www.microstrain.com/support/documentation For further assistance our technical support engineers are available to help with technical and applications questions.

  • Page 79: Parts And Configurations

    LORD Sensing Sales Department. LORD Sensing Model Number Description Part Number WSDA-2000 6314-2000 Wireless Sensor Data Aggregator Configuration Options (specify at time of order) LORD Sensing inertial sensor capable: a different operating system is installed on the gateway to enable this feature, and to add GPS as an option in the time synchronization menu.
  • Page 80 ® WSDA -2000 User Manual Products can be ordered directly from the LORD Sensing website by navigating to the product page and using the Buy feature.  http://www.microstrain.com/wireless For further assistance, our sales team is available to help with product selection, ordering options, and questions.

  • Page 81: Specifications

    ® WSDA -2000 User Manual Specifications 12.1 Physical Specification Dimensions: 147 mm x 110 mm x 23 mm without antenna Weight: 346 grams Enclosure Environmental Rating: General purpose indoor...

  • Page 82: Operating Specifications

    ® WSDA -2000 User Manual 12.2 Operating Specifications Parameter Specifications General ® ™ Processor Cortex A8, 1 GHz Operating system Linux Ethernet IEEE 802.3 10/100 Mbps, IEEE 802.15.4 and Connectivity Proprietary wireless, J1939 CAN (output only), and USB 2.0 virtual Ethernet port Internet standards HTTP, HTTPS,TCP/IP, UPnP,UDP IP assignment...
  • Page 83 ® WSDA -2000 User Manual Parameter Specifications Firmware Firmware and OS upgradeable through web interface SensorCloud SensorConnect™ 8.3 or newer, Windows 7, Software 8 & 10 compatible Regulatory compliance *Actual range varies with conditions **Measured with antennas elevated, no obstructions, no RF interferers.

  • Page 84: Radio Specifications

    ® WSDA -2000 User Manual 12.3 Radio Specifications The WSDA- 2000 employs a 2.4GHz IEEE 802.15.4- compliant radio transceiver for wireless communication.  The radio is a direct- sequence spread spectrum radio and can be configured to operate on 16 separate frequencies ranging from 2.405 GHz to 2.480 GHz.  Following the 802.15.4 standard, these frequencies are aliased as channels 11 through 26. ...

  • Page 85: Safety Information

    ® WSDA -2000 User Manual Safety Information This section provides a summary of general safety precautions that must be understood and applied during operation and maintenance of components in the LORD Sensing Wireless Sensor Network. 13.1 Disposal and Recycling ® The WSDA - 2000 contains printed circuit boards and electronic components. These items are known to contain toxic...

  • Page 86: References

    ® WSDA -2000 User Manual References 14.1 Related Documents Many references are available on the LORD Sensing website including product user manuals, technical notes, and quick start guides.  These documents are continuously updated, and new applications are added. They may provide more accurate information than printed or file copies.  Document Where to find it Online Wireless Network Calculator...

  • Page 87: Glossary

    ® WSDA -2000 User Manual Glossary These terms are in common use throughout the manual: A/D Value: the digital representation of the analog voltages in an analog-to-digital (A/D) conversion. The accuracy of the conversion is dependent on the resolution of the system electronics; higher resolution produces a more accurate conversion.
  • Page 88 ® examples of nodes manufactured by LORD MicroStrain ® Node Tester Board: The node tester board is a device designed by LORD MicroStrain that can be plugged into nodes to test their functionality. Offset: When describing a mathematically-linear relationship, the offset is the value where the line that represents the relationship in a graph crosses the y -axis. ...
  • Page 89 ® WSDA -2000 User Manual Periodic Burst Sampling: a mode of operation in which the node is sampled for a fixed window of time (burst) and then repeats that window at set intervals. The burst duration and time between bursts is configurable.
  • Page 90 ® WSDA -2000 User Manual Transmission rate: the number of data packets per transmission window, measured in seconds. Depending on the sampling mode and settings it will be between 1 and 64 packets/second. Transmission window: the time allowed for one data transmission at the automatically determined transmission rate USB: Universal Serial Bus is a serial data communications protocol WSN: Wireless Sensor Network describes a distribution of sensors and data acquisition equipment...

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