Product category:
Power supplies and plant cabling
News Release from: Omniflex (UK) | Subject: Maxiflex
Edited by the Processingtalk Editorial
Team on 16 March 2007
Flow Monitor overcomes common plant
problems
Omniflex have created a flow monitoring solution using Maxiflex, to overcome two common problems on plant: poor quality 4-20mA cabling, and the availability of only digital inputs into the DCS
Maxiflex Flow Monitor overcomes common plant problems Omniflex have created a flow monitoring solution using Maxiflex, to overcome two common problems on plant: 1) Existing poor quality cabling which prohibits the measurement of 4-20mA signals over long distances and 2) the availability of only digital inputs in the DCS The Maxiflex solution uses a local node near the DCS and remote node near the flow transmitters, linked via Conet, which can be up to 10km long, and capable of transmitting data over poor quality links
This article was originally published on Processingtalk on 6 Oct 2008 at 8.00am (UK)
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The remote node converts the analogue inputs into flow counts and totalises them for each of the channels that it monitors.
These counts are then transmitted across the Conet LAN and stored in the local node several times per second.
The local node calculates the total flow between updates and outputs a digital bit stream from the digital output card, which is input to the DCS and then read as a weighted flow pulse.
Because Conet is an ultra-long distance network, the flow readings can now be taken from the remotest transmitters and read in the control room with very high accuracy.
The Maxiflex Digital Flow Rate System not only saves expensive cabling from source to DCS, but also enable projects to be implemented that would otherwise be economically prohibitive.
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