-------------------------Monitor------------------------ The Newsletter for PC-Based Data Acquisition and Control Issue 176 www.windmill.co.uk March 2013 --------------------ISSN 1472-0221---------------------- Hello and welcome to Monitor. This month we've launched a Windmill Google+ page at https://plus.google.com/107072683025496630222/. Check it out for articles and tips on data acquisition. If you want to ask us questions or talk to us there please add us to your circles and we will reciprocate. I hope you enjoy this issue, but should you wish to remove yourself from our mailing please go to Monitor Newsletter CONTENTS ======== * Get Data from Even more Instruments with Enhanced Windmill * Excel Corner: How to Exclude Extreme Data Values from a Mean * DAQ News Round-up ________________________________________________________ ________________________________________________________ Get Data from Even more Instruments with Enhanced Windmill ________________________________________________________ In January we announced the launch of Enhanced Windmill, which included all our software for just £295. We are pleased to say that you can now use Enhanced Windmill to get data from even more instruments and devices. Up until now, Enhanced Windmill could communicate with data acquisition hardware over Ethernet, Internet, USB, RS-232, RS-422, RS-485 and Modbus. We've added the Harvester driver to the package, which means that Enhanced Windmill can now get data from any instrument that can act as a DDE Server. This opens up your system to many more data sources. For example: instrument software from Malvern Industries, Quizix (Pumpworks), Bronkhorst, Texas Weather Instruments, GE Measurement and Control, Point Six Wireless, Eagle Technology, Hexatec, Omega Engineering, Wonderware, Echelon, fieldbus networks and others. Harvester handles up to 10 device drivers or Windows applications at once. It supports up to 100 input and output channels. * Clients and Servers? ==================== Software engaging in DDE conversations are often referred to as clients and servers. A server always responds to requests, or commands, from a client. The standard Windmill programs can act as DDE servers, but not as clients. Harvester, however, turns Windmill into a client which can draw in data from any software acting as a DDE server. * Example Application: Logging Data from a Particle Analyser ===================================== A measurement and control system often involves several different types of instrument from several different manufacturers. The software must be able to cope with all these variations One example of this is using a particle analyser (from Malvern Instruments) under computer control. The analyser's own internal software decides when it needs a sample of liquid and sends this request to the Harvester driver. Harvester tells the Windmill control software to turn on a pump, supplying exactly the right amount of liquid to the particle analyser. The analyser sends its results to Harvester which passes them to Windmill to be logged and displayed alongside data from other parts of the system. * Getting Hold of Harvester ========================= Harvester comes free with Enhanced Windmill. You can also add it to the standard Windmill package at a cost of £195. * Further Reading: ================ Enhanced Windmill http://www.windmillsoft.com/daqshop/ More About Harvester http://www.windmillsoft.com/daqshop/dde.html ________________________________________________________ ________________________________________________________ Excel Corner: How to Exclude Extreme Data Values from a Mean ________________________________________________________ There are often times when you want to calcuate the mean or average of a set of readings, but exclude the most extreme readings. One way to do this in Excel is to use the TRIMMEAN function. This calculates the mean but excludes a % of readings: the highest and lowest readings to be precise. The syntax is: TRIMMEAN(array,percent) where array is your set of readings and percent the amount to discard. Example, TRIMMEAN(a1:a100,10%) For example, if you chose to discard 10% of 100 readings, 10 readings would be discarded: the 5 highest and the 5 lowest. If your percentage does not give an even number of discards, Excel rounds it down. For example, discarding 3% of 100 readings would mean Excel removed 1 high reading and 1 low reading. Read more tips and tricks for Excel at http://www.windmill.co.uk/excel/excel-tips.html ________________________________________________________ ________________________________________________________ DAQ News Round-up ________________________________________________________ Welcome to our round-up of the data acquisition and control news. If you would like to receive more timely DAQ news updates then grab our RSS newsfeed at http://www.windmillsoft.com/monitor.xml. Read http://www.windmill.co.uk/newsfeed.php for notes on how to display the news on your own web site or automatically tweet it. A fiasco after five years of work on ISA100.12 The ISA100.12 subcommittee co-chair Dick Caro has announced that ISA100.12 has abandoned its work after four years without finding a single convergence solution for wireless instrumentation, according to the Industrial Automation and Process Control Insider. Source: Industrial Automation and Process Control Insider http://nickdenbow.wordpress.com/ Researchers Develop Real-Time Secondhand Smoke Sensor Dartmouth College researchers have invented the first ever secondhand tobacco smoke sensor that records data in real time, a new study in the journal Nicotine and Tobacco Research shows. Source: Eureka Alert http://www.eurekalert.org/ Short-Range Wireless Technology IC Market to Grow The total market for open short-range wireless technology based ICs, i.e. Bluetooth, Wi-Fi, ZigBee, NFC and GPS, is expected to reach almost 5 billion units in 2013 and grow to nearly 8 billion by 2018, according to a report by ABI Research. It is industrial applications that will be the major growth drivers over the next 10 years. Source: ABI Research http://www.abiresearch.com/ ________________________________________________________ ________________________________________________________ * Copyright Windmill Software Ltd * Reprinting permitted with this notice included * For more articles see http://www.windmill.co.uk We are happy for you to copy and distribute this newsletter, and use extracts from it on your own web site or publication, providing the above notice is included and a link back to our website is in place. An archive of previous issues is at http://www.windmill.co.uk/newsletter.html and an index of articles at http://www.windmill.co.uk/monitorindex.html Windmill Software Ltd, PO Box 58, North District Office, Manchester, M8 8QR, UK Telephone: +44 (0)161 833 2782 Facsimile: +44 (0)161 833 2190 E-mail: [email protected] http://www.windmill.co.uk/ http://www.windmillsoft.com/
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