Controller measures AGA gas flow calculations
Recently created AGA-3 orifice plate and AGA-7 turbine meter flow measurement calculations now can be added to any of this firm’s IPm RTU controllers.
This add-on application is suited for users who needs gas flow calculations as part of a flexible SCADA or control application.
This also may be helpful for any application that needs a flow computer with secure ethernet or internet access or any of the capabilities of the open Linux-based IPm product family.
The new add-on will totalize transferred volumes based on calculated flow. The gas density input required for AGA-3 and AGA-7 flow calculations can be provided either by AGA-8 gas density calculations or by an external density transmitter connected to an analog input channel.
The AGA-8 algorithms are implemented as part of the run-time software in the IPm.
The gas composition data required by the AGA-8 gas density energy calculations are entered via configuration software. Or the run-time software can be configured to obtain the gas composition data directly from an external gas chromatograph connected to the IPm. Communications between the IPm and the optional external gas chromatograph is through Modbus protocol.
Source: Sixnet, Box 767, Clifton Park, NY 12065.
New unit monitors H2S on-line
The new H2S-220 process fiber-optics diode-array UV spectrophotometer monitors H2S on-line.
This solid state device is designed to address on-line applications that require accurate, rugged, and maintenance-free monitoring. The diode array design allows accurate correction for species that have interfering absorbencies and to measure low and high levels of H2S with the same analyzer. The unit measures 1,024 discrete frequencies between 190 nm and 800 nm with a 1.0 nm resolution.
The analyzer is offered in general purpose or explosionproof enclosures and includes an option for automatic zero and span. Output signals include 4-20 ma and Modbus TCP/IP.
Source: Applied Analytics Inc., 2 Clock Tower Pl., Suite 535, Maynard, MA 01754.
System for LNG carriers gains certification
This firm’s Foxboro custody transfer system (CTS) for LNG carriers has been certified by Japan survey organization Nippon Kaiji Kentei Kyokai.
The system is based on a new noncontact pulsed laser technology that combines the accuracy of traditional capacitive-based systems with the lower total cost of ownership of nonintrusive radar-based level measurement systems. The CTS promises accurate measurement and data logging of levels, temperatures, and pressures required for the calculation of total LNG cargo loaded or discharged.
Source: Invensys PLC, Portland House, Stag Pl., London SW1E 5BF, UK.
