Monday 29 August 2011

Safe 2 wire Coriolis flowmeter - a first!

Coriolis flowmeter achieves superior performance and safety without the need for external adapters or barriers

The Promass E 200 Coriolis flowmeter, from Endress+Hauser, is the world’s first Coriolis flowmeter with true two-wire 4-20mA HART technology. The Promass E 200 is the only two-wire Coriolis meter with a full 16 mA of measurement span without the need for excess adapters, power supplies or barriers.

This advanced meter design results in simplified integration into existing control systems, and allows the flowmeter to be used with DCS, PAS, PLC and other remotely operated controller systems. The 4-20mA interface makes it easy to replace legacy flow sensors without any change in field wiring. In many cases, the Promass E 200 can simply be “dropped in” to replace an existing flowmeter, without the need for additional hardware or rescaling of control systems.

"The Promass E 200 is the world’s safest Coriolis meter because its two-wire technology enables it to be used in intrinsically safe applications for Class 1 Division 1 locations. The Promass E200 has been submitted for a SIL-2 rating for critical applications and complies with NE43 (NAMUR) safety standards, including operating down to 3.6 mA in a fail-safe condition. Self-monitoring and error diagnostics are standard features that are designed in strict accordance with the specifications of NE107 (NAMUR)."

It has built-in diagnostics, and displays clear text errors and root causes on its local display in case of a fault. The flowmeter can also be commissioned and diagnosed with Endress+Hauser’s FieldCare software.  If servicing is needed, the HistoROM function automatic data backup function ensures automatic reconfiguration of a repaired or new meter without the need for recalibration.

This unit simultaneously measures mass flow, fluid density and temperature. In addition to liquids such as acids, alkalis, and solvents, it also measures most gases. It measures mass flow and volume flow with 0.25% accuracy, and measures density with accuracy of 0.0005 g/cm3. It operates in process pressures of Classes 150 to 600, and process temperatures up to  284 °F.

The Promass sensor is highly immune to external disturbances such as pipeline vibration, and is stable under changing process conditions such as pressure, density, temperature or viscosity.

They can supply this instrument in line sizes of 3/8 to 2 inches (DIN 8 to 50) with 904L Stainless Steel as a standard wetted material. Transmitter options include aluminium and stainless steels to meet various chemical, oil, gas, process, food, beverage and life sciences applications.

Commissioning and Diagnostics
Operator, maintenance and expert menus can be called up immediately at the touch of a button. “Make-it-run” wizards guide the user through flowmeter configuration, and “Tool tips” allow setting of additional parameter information. In the event of an error, remedy information is immediately displayed.

• Promass E 200 flowmeters produced for the Americas are calibrated on the ISO/IEC 17025 Certified Gravimetric Primary Calibration Rig at the E+H factory in Greenwood (IND US), and shipped to the customer with a NIST traceable calibration certificate. The calibration is fully traceable to national and international standards.

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