Sensors: Pump monitoring system uses pump noise to head off failures

10/26/2006


Software, Networks, System integration
DA400 from Siemens uses acoustic signature to spot future maintenance problems.

Siemens Energy & Automation's acoustic diagnostics system takes preventive maintenance on oscillating positive-displacement pumps to a new technological level. The Sitrans DA400 acoustic diagnostic system continuously monitors pump status and detects even the smallest leaks on pump valves. The system consists of four acoustic sensors mounted on the pump and a diagnostics device connected by up to 65 feet of cable. With continuous online monitoring, the ultrasonic sensors detect cavitation generated by the pump suction and discharge valves. These measurement results, which appear on the diagnostic display or can be transferred to the control room over Profibus and analyzed in a control system like Simatic PCS 7. Any drop in pump efficiency is indicated, preventing unnecessary plant shutdowns by forewarning maintenance personnel.

The Sitrans DA400 system is suitable for all oscillating positive-displacement pumps used in mining, chemical/petrochemical industry and sewage treatment to pump fluids containing impure solids such as sludge. The diagnostics device is rated IP65 and can be operated between - 4 °F and 140 °F. The sensor is rated IP66/68 and operates between - 40 °F and 230 °F.

For more information visit the Siemens website at www.usa.siemens.com .

C.G. Masi , Control Engineering senior editor





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