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The LORD MicroStrain® WSDA-Base-101-LXRS Wireless Analog Output Base Station supports all data acquisition sessions between wireless nodes and host computers including Synchronized Sampling (both Continuous and Burst modes), Armed Datalogging, Datalogging, Streaming and Low Duty Cycle. As an integral feature, the WSDA-Base-101-LXRS has an analog output back panel that supports analog data acquisition equipment (DAQs). Up to 8 sensor channels from one or multiple wireless nodes can be fed into a DAQ with simultaneous digital feed into a PC, or into a DAQ with the PC removed (stand-alone configuration). Each channel on the back panel has a 0 to 3 volt range representing the particular sensor’s full scale output. In some environments and with some equipment, the 0 to 3 volt range is not appropriate; many types of programmable logic controllers (PLCs) and DAQs have only current loop inputs, are therefore incompatible with voltage output sensors, and require a 4 to 20 mA output range to operate. This technical note demonstrates how to convert the 0 to 3 volt output to a 4 to 20 mA output using a third party converter and assumes familiarity with the WSDA-Base-101-LXRS, LORD MicroStrain wireless nodes and Node Commander software.

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The LORD MicroStrain V-Link-LXRS Wireless 7 Channel Analog Input Sensor Node supports a wide range of Wheatstone bridge and analog sensors including acceleration, vibration, strain, load cells, torque, pressure, magnetic fields, displacement, geophones, etc. As a basic function of support for these sensors, the V-Link-LXRS is measuring small voltages. This technical note demonstrates how to measure a voltage within a +/-20 mV range on channels 1 through 4 and assumes some familiarity with the V-Link-LXRS and Node Commander software. The technical note goes on to demonstrate measurement of other small voltage ranges.

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The LORD MicroStrain V-Link-200 supports a wide range of Wheatstone bridge and analog sensors including acceleration, vibration, strain, load cells, torque, pressure, magnetic fields, displacement, etc.

As a basic function of support for these sensors, the node measures small voltages. The nodes can actually be repurposed to measure small currents. This is useful, for example, if one wanted to add the wireless capability of the nodes to a 4 to 20 mA sensor. See pages 50-51 of the V-Link 200 user's manual http://www.microstrain.com/sites/default/files/v-link-200_user_manual_85... for more information.

The LORD MicroStrain® V-Link-LXRS Wireless 7 Channel Analog Input Sensor Node and the SG-Link-LXRS Wireless 2 Channel Analog Input Sensor Node support a wide range of Wheatstone bridge and analog sensors including acceleration, vibration, strain, load cells, torque, pressure, magnetic fields, displacement, geophones, etc. As a basic function of support for these sensors, the nodes provide +3 volt DC excitation to the sensor circuit. The excitation is initiated when the node is instructed to sample. Because the excitation turns on and turns off as the sampling turns on and turns off, a relay can be switched on and off, and used to control another component in a system. For example, a motor could be turned on and off to coincide with the sensor sampling. This technical note assumes some familiarity with the V-Link®-LXRS, SG-Link-LXRS and Node Commander® software.

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The LORD MicroStrain V-Link®-LXRS Wireless 7 Channel Analog Input Sensor Node and the SG-Link®-LXRS Wireless 2 Channel Analog Input Sensor Node support a wide range of Wheatstone bridge and analog sensors including acceleration, vibration, strain, load cells, torque, pressure, magnetic fields, displacement, geophones, etc. As a basic function of support for these sensors, the nodes measure small voltage. The nodes can actually be repurposed to measure small current. This is useful, for example, if one wanted to add the wireless capability of the nodes to a 4 to 20 mA sensor. This technical note assumes some familiarity with the V-Link-LXRS, SG-Link-LXRS and Node Commander software, and uses a 4 to 20 mA pressure transducer for its example.

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Yes, but you must be sure to cut the correct end or the plunger will not work and must be replaced.

1.       The M-DVRT plunger has a smaller diameter wire protruding from the end that is not inserted into the DVRT body.  This is the end that can be cut.  Another way to determine the correct end is to insert the plunger into the DVRT and observe the output.  If you get an output change, do NOT cut that end, as it is the end with the ferrite, and the plunger will no longer work if this end is cut.  You can use a pair of wire cutters to cut the M-DVRT plunger.

2.       The S-DVRT plunger looks like it is plugged at one end and hollow at the other end.  The plugged end is the end with the ferrite: do NOT cut that end.  Again, another way to determine the correct end is to insert the plunger into the DVRT and observe the output.  If you get an output change, do NOT cut that end, as it is the end with the ferrite, and the plunger will no longer work if this end is cut.  You can use a dremel tool to cut the S-DVRT plunger.

When cutting the plungers, keep in mind that you want some length of plunger protruding from the DVRT for mounting when it is fully compressed.

The GPS PPS signal is available on pin 7. It can drive one high impedance TTL input.

 

NMEA packets can be had by putting the 3DM-GX3-35 or 3DM-GX3-45 in GPS Direct mode and manipulating the devices with the GPS manufacturer’s software.

Here are two technical notes which show how this is done:

http://files.microstrain.com/8401-0017-Using-u-blox-Software-3DM-GX3-35-3DM-GX3-45.pdf

http://files.microstrain.com/8401-0013-Outputting-NMEA-Packets-to-GPS-Ready-Software.pdf

NMEA packets can also be generated in the user's own application by gathering the navigation data output by the 3DM-GX3-35 or 3DM-GX3-45 and formatting it into NMEA packets. The inertial sensor feeds navigation data to the host computer, the host computer formats the navigation data into NMEA packets, and sends them out the serial port to a NMEA-ready device.

No.  Node Commander is a Windows software which requires a standard version of the XP Pro, Vista, Win 7 or Win 8 operating system.  Smart phones do not have these standard operating systems installed.

Node Commander is a Windows software which will operate on XP Pro, Vista, Win 7 and Win 8.  Any computing platform, whether desktop, laptop, tablet, etc. which supports these standard Windows OS can be used for Node Commander.

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