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| January 17, 2008 | SUBSCRIBE | To UNSUBSCRIBE | CHANGE YOUR PROFILE | PRIVACY POLICY |
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 Fluke 771 Milliamp Process Clamp Meter Measure 4-20 mA signals without breaking the loop with this new, compact clamp meter for PLC and control systems analog I/O. The detachable clamp with extension cable allows you to take measurements in tight locations, and the built-in spot light illuminates hard to see wires in dark enclosures. Go to www.fluke.com/771-CtrlEng for more information. |
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Tutorial: Coriolis flowmeters for gas service More than once in these pages we have discussed the tricky process of measuring compressed air or other gas flows. (See earlier stories on rotameters and thermal mass flowmeters.) The compressible nature of gas makes it more difficult to measure than liquids, particularly when your goal is to convert the reading to a standardized temperature and pressure or mass measurement. In critical situations, a Coriolis flowmeter may be the best solution, although it will not be the least expensive. Wireless analysis: Avoiding the mistakes of history? Perhaps I’m being overly optimistic, but it looks like wireless providers and standards groups may actually be working together to create useful standards for wireless instrumentation and control networks, avoiding some of the problems of the “fieldbus wars.” Moreover, this cooperation may actually save you money and aggravation. Here’s what we’ve seen lately. Mixing networks: Transmit instrumentation data via wireless and Web Sometimes it takes more than one technology to get instrumentation data to all the places it needs to go. One package offered recently illustrates this point and suggests ways networking methods can be combined to extend the reach of data. In this new example, MTS Systems’ sensors division has been working with OleumTech Corp. to capture data from field instruments via wireless and then send it to additional users via the Web. Pressure instrument: Programmable sensor/switch with wide operating range Turck has introduced a new programmable pressure instrument that can be programmed to operate as an analog sensor with one switch point, or with two switch points and no analog output. This choice is user programmable and the same unit can operate in either mode as the application demands. Temperature transmitters: Two-wire, rail mount units for RTDs, thermocouples, more Siemens Energy & Automation, Inc. has released two new, two-wire temperature transmitters, the Sitrans TR200 and the Sitrans TR300, designed for rail mounting. These devices reportedly support all standard RTDs and thermocouples, as well as resistance and voltage inputs. Pressure instrument: Digital gage includes data logger MadgeTech, Inc. has released the PR2000 family of digital pressure gages with onboard LCD and data logging capability. Reportedly capable of storing up to 262,143 readings in non-volatile memory, the series features real-time graphing capability, displaying a graph as data is received showing 100 previous readings. Data is downloadable via PC serial or USB connections. |
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Mynah simulation for testing, training Martin Berutti and Nobin William talk to Peter Welander about Mynah's process simulation platforms for control system testing and training. (21 minutes) Listen to Podcast.
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