The Veris Industries H923 accepted transducer is acclimated to adviser AC currents. The Veris Hawkeye H923 monitors the AC accepted casual through a conductor. The H923 is a self-powered accepted transducer consisting of a primary winding, a alluring amount and a accessory winding. The monitored aqueduct is anesthetized through the centermost of the laminated adamant and silicon animate arena creating a distinct ‘turn’ primary winding. The accessory ambagious consists of a abate gauged wire captivated hundreds of times about the ring. The alternating accepted abounding in the primary ambagious produces a alluring acreage in the amount inducing a accepted breeze in the accessory winding. The accepted breeze in the accessory ambagious is accurately proportional to the accepted in the abstinent circuit. The H923 produces a 0-10VDC output, linearly proportional to the accepted in the conductor.
Figure 1. Veris Hawkeye H923 Transducer
Veris makes a few variations of the H923 (0-2/100/150A). The H922 (0-130/60/20A), H722HC/723HC (0-50/100/150A) and H722LC/723LC (0-10/20/40A) are all self-powered accepted sensors that accept slide-switch selectable ranges. The H92x alternation are split-core sensors and the H72x alternation are solid amount transducers. The sensors achievement a 0-5VDC or a 0-10VDCsignal.
These sensors are advised for aerial voltage and accepted applications and it is accordingly important to booty the all-important precautions aback installing the sensors. During accession ensure to chase the ascent instructions provided with the transducer. Additionally ensure that all affairs are mechanically anchored a any affiliation points.
NI WSN allows for accepted abstracts to be taken in alien locations after the charge for ample base networks aing assorted sensors to a host machine. It is now additionally accessible for the user to wirelessly address the sensor’s abstracts aback to a host machine. This can additionally be done on array ability thereby eliminating all affairs but that aing the sensor’s achievement to the WSN Node.
Another aloft account of wireless abstracts alteration with WSN is the affluence of arrangement expansion. Abacus ecology credibility is as accessible as abacus a accepted transducer and base it up to a new or absolute WSN node. If it is a new bulge it is calmly added to the arrangement through the use of the I/O server. If the bulge is too far to acquaint with the aperture directly, added nodes in the arrangement can be acclimated to broadcast the abstracts aback to the aperture appliance WSN cobweb networking.
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The afterward accouterments is bare to affix the Veris H923 to the NI WSN-3202 Voltage Node.
The H923 produces a 0-10VDC output, linearly proportional to the accepted in the conductor. This 0-10 V arresting can be abstinent anon by the NI WSN-3202 voltage node. The H923 is self-powered, so no ability accumulation is bare for the sensor.
Figure 2 shows how to affix the aloft apparatus properly. It is important to not arena the absorber wire to the AIGND of the WSN Node. In this case if you are experiencing babble in your arresting you should affix the absorber of the Veris sensor to a acceptable ground.
Figure 2. Aing H923 to WSN-3202
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Extracting the abstracts from the NI WSN-3202 is adequately straightforward. After creating a new activity and abacus the WSN aperture and nodes, as categorical in the Getting Started with WSN guide, it is all-important to configure the analog ascribe approach to be used. To do this, appropriate bang on the WSN -3202 Voltage Bulge and baddest Properties. In the channels tab baddest the analog ascribe approach that the sensor is affiliated to. Baddest /-10V as the range. Sensor action can be larboard abandoned because the H923 is self-powered and if the node’s action leads are disconnected, no ability will be fatigued from the node.
Once the bulge and aperture are setup, it is a simple amount of accepting the data, ascent it and announcement it. In all cases the abstracts is transferred through a aggregate variable. The aggregate capricious can be abject and alone assimilate the block diagram from the activity explorer. Once on the block diagram, appropriate bang on the aggregate capricious and baddest Show Time Stamp. If we don’t appetite to amend the Indicator with again abstracts it is important that the timestamp is not according to the timestamp from the antecedent iteration. To do this, analyze the timestamp from the antecedent abundance to the aggregate variable’s timestamp. If they are not the aforementioned we amend the control, if they are the aforementioned we do not amend the control. The ascent of the abstracts is a simple beeline affiliation that maps the 0-10V achievement to a 0 to best current. The best accepted is abased on the sensor and the baddest range. A advanced console ascendancy is acclimated to change the best current.
Figure 3. LabVIEW VI Block Diagram Running on Host Computer – Acquires, Scales and Displays Data.
With LabVIEW WSN, you can download and run LabVIEW VIs on the programmable adaptation of the WSN-3202 bulge for bounded abstracts processing and control. For example, you could accomplish the abstracts ascent to engineering units locally on the bulge itself. However because of the apathetic sampling ante bare for best accepted ecology applications, this may not accommodate a allusive advantage unless your specific appliance requirements crave added bounded processing or control.
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