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Acromag is excited to announce our new ST130 series transmitters now have UL approvals. We also have a case study to share with you about how an oil rig operator upgraded their flow measurement systems using Ethernet.
For more information, call our sales engineers at 248-295-0880 to discuss your application or request a quote.
Temperature Transmitters now UL-approved for Class 1 Div 2 hazardous locations
Acromag’s ST130 series of two-wire transmitters are now UL listed in the U.S. and Canada for use in Class I Division 2 Group A, B, C, D hazardous locations with volatile substances. These USB-configurable instruments condition thermocouple, RTD, millivolt, and resistance input signals for output as proportional 4-20mA control signals. ATEX and IECEx certifications are still pending, but should be available soon.
This UL approval permits use of the ST130 loop-powered transmitters in environments with flammable liquids, gases, or vapors. UL’s Class I Div 2 certification is often required for electronics deployed in chemical, oil, gas, mining, and other manufacturing facilities. With the higher safety rating, the ST130 units can be installed closer to sensors and other devices to reduce installation costs for monitoring and control systems.
Using Ethernet I/O Modules to Upgrade Flow Measurement Systems
We recently came across this case study where an innovative automation services firm developed a virtual flow computer using Acromag BusWorks I/O modules to interface 4-20mA signals to an Ethernet network.
In this application, an oil rig operator had to upgrade its flow measurement systems on an offshore platform that was more than 20 years old. The platform produced from multiple fields (with multiple and different ownerships), so utilities such as fuel, flare, gas lift, produced water and water injection had to be accounted and reported for allocation purposes in the upgrade project as well as field and platform exports. In total, 56 flow measurement points had to be accommodated.
For this system, the system developer proposed Acromag 961EN-4006 devices, which are commonly used Ethernet to 4-20mA I/O devices. Each module is able to process 6x 4-20mA inputs. Each input having an accuracy of 0.05%. This accuracy is more than sufficient for the proposed meters, as these meters ONLY have one single dP input, and no live values for pressure and temperature.