The IEPE-Link™ -LXRS® specialized high-speed node is designed for synchronized, periodic burst sampling of piezoelectric devices.

Product Highlights

  • Designed for high speed, high resolution periodic burst sampling of Integral Electronic Piezoelectric (IEPE) and Integrated Circuit Piezoelectric (ICP®) accelerometers
  • Ideal for vibration sensing in challenging applications, such as critical structure and machine health monitoring
  • High resolution data with 24-bit A/D converter
  • User-programmable 1 KHz to 104 KHz sample rates
  • 109.5 dB dynamic range
  • User-selectable low pass filtering
Datasheet Manual Software
Large Quantity & OEM Orders

Wireless Simplicity, Hardwired Reliability™

High Performance

  • Node-to-node synchronization up to ±32 microseconds
  • Lossless data throughput under most operating conditions
  • Extended wireless communication range to 2km

Ease of Use

  • High capacity, rechargeable battery for extended use
  • Remotely configure nodes, acquire and view sensor data with Node Commander®.
  • Optional web-based SensorCloud™ interface optimizes data storage, viewing, and analysis.
  • Accepts most IEPE accelerometers

Cost Effective

  • Out-of-the box wireless sensing solution reduces development and deployment time.
  • Volume discounts
General

Sensor input channels

IEPE accelerometer, 1 channel

Resolution

24-bit resolution

Dynamic range

109.5 dB dynamic range

Anti-aliasing filter bandwidth

5th order low-pass Butterworth filter with programmable cutoff frequencies from 26 Hz to 33 KHz

Digital finite impulse response

(FIR) filter

100 dB in frequency band from 1/2 to 8 times the sample rate

IEPE Accelerometer Requirements

Excitation voltage

23 V dc

Excitation current

2.3 mA

Output voltage

± 5 V dc

Sampling

Sampling modes

Synchronized (periodic burst sampling only)

Sampling rates

Periodic burst sampling: 1 kHz to 104 kHz

Maximum burst periods

150 seconds @ 1 kHz; 3 seconds @ 50 kHz; 1.3 seconds @

104 kHz

Measurable signal bandwidth

1 Hz to 33 kHz

Sample rate stability

± 3 ppm

Network capacity

Up to 125 nodes per RF channel (and per gateway) depending on the number of active channels and sampling settings. Refer to the system bandwidth calculator: http://www.microstrain.com/configure-your-system

Synchronization between nodes

± 32 μsec with 10 sec beacon interval (synchronized mode)

Operating Parameters

Radio frequency (RF)

transceiver carrier

2.405 to 2.470 GHz direct sequence spread spectrum over 14 channels, license-free worldwide, radiated power programmable from 0 dBm (1 mW) to 16 dBm (39 mW); low power option available for use outside the U.S.A.- limited to 10 dBm (10 mW)

RF communication protocol

IEEE 802.15.4

Range for bi-directional RF link

70 m to 2 km line of sight with RF power setting

Power source

Internal: 3.7 V dc, 650 mAh rechargeable battery

External: 3.2 V dc to 9 V dc

Power consumption

 

1 burst /10 minutes: 2.9373 mA (10.57 mW), 1 burst/hr: 0.6957 mA (2.50 mW), 1 burst/4 hrs: 0.2875 mA (1.04 mW), 1 burst/24 hrs: 0.1738 mA (0.63 mW) (all sampling @ 10 kHz with 5 second burst duration). See battery life calculator: http://www.microstrain.com/iepe- link-lxrs-battery-life-calculator

Operating temperature

-20 ˚C to +60 ˚C (-40 ˚C to +85˚C available with external battery)

Physical Specifications

Dimensions

94 mm x 79 mm x 21 mm

Weight

114 grams

Enclosure material

Aluminum

Environmental rating

Indoor use

Integration

Compatible gateways

All WSDA® base stations and gateways

Compatible sensors

IEPE type sensors that operate within the node input specifications and have an output within ± 5 V dc (custom options available)

Connectors

10-32 coaxial (IEPE input), terminal block (future use)

Software

SensorCloud™, SensorConnect™, Node Commander®, Windows 7 (or newer)

Software development

Open-source MicroStrain Communications Library (MSCL) with sample code available in C++,Python,and.NET formats (OS and computing platform independent): http://lord-microstrain.github.io/MSCL/

Regulatory compliance

FCC (U.S.), IC (Canada), ROHS

 

In general 802.15.4 and WiFi (802.11) coexsist without much interference to either type of signal.  However, physical placement of wireless routers and WSDA -base stations may require the selection of "prefered" channels.   There are only two (2) 802.15.4 channels where WiFi DOESN’T share the same frequency, 15 and 20.

Typically, Wifi APs default to channel 6.

 

*note: channel 25 and 26 are not available with current Lord Microstrain wireless technology

The % bandwidth has to do with how many nodes/channels you can use at one time.  When setting up a Synchronized Sampling network, Node Commander will interrogate each node and assign transmission slots for them to send data to the base station.  This is designed to keep the nodes from broadcasting at the same time and causing data loss.  The more channels, and higher sample rate of a node will require more transmission slots, thus higher % of available bandwidth used.

The most common cause of this issue is that the customer connects the WSDA directly to the PC via the ethernet cable without setting the WSDA -1000 up for Static IP first.  If you refer to page 3 of the quick start guide http://files.microstrain.com/WSDA-1500_QSG_(8501-0057).pdf

To connect to the gateway Control Panel through Live Connect™ an initial connection to a DHCP enabled network is required.

1. Connect the host computer and gateway to the DHCP network, and apply power to the gateway.

Verify the gateway status indicator shows that it is on and has completed the boot up process.

 

This means that the WSDA and the computer needs to be connected to a device (like a router) that will assign an IP address to it.  Once this is done the user will be able to log into the WSDA web control panel (using the router assigned IP), and change the network mode to Static IP in the configuration screen.  They would then need to change the network card of the computer to a complementing Static IP.  After this is done the user should be able directly connect the WSDA to a computer.

Excel displays our time stamp incorrectly.  If you were to open the data file in Notepad you would see the correct time format.  To correct the data in Excel, Highlight all of column A, right click on the highlighted region and select Format Cells.  Under the Number tab select Custom, Scroll to the bottom of the list that appears and select “m/d/yyyy h:mm”.  You will need to add “:ss.000” to the end of this, so it looks like this “m/d/yyyy h:mm:ss.000” .  Setting the cells to this will give you the highest resolution that Excel can show.

We use Universal Coordinated Time (UTC) to collect data on all of our devices.  There is no provision to set the time to a local time zone. 

The IEPE-Link™ -LXRS® accepts inputs from most IEPE sensors using the industry standard 10-32 mini-coaxial connector and 2.3 mA constant current excitation.

 

 

 

 

 

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