CMR CONTROLS Air Management System Manufacturers of Pressure, - PowerPoint PPT Presentation

Apr 13, 2023 •179 likes •266 views

CMR CONTROLS Air Management System Manufacturers of Pressure, Velocity Sensors and Controls CMR PRESSURE TRANSDUCER CMR manufactures sensors since 1980 and more than 500 000 Sensors are in use world wide The CMR pressure transducer is known

CMR CONTROLS Air Management System Manufacturers of Pressure, Velocity Sensors and Controls
CMR PRESSURE TRANSDUCER CMR manufactures sensors since 1980 and more than 500 000 Sensors are in use world wide The CMR pressure transducer is known for its high accuracy and repeatability Calibration is carried out traceable to National and International Standards
CMR SENSOR PRINCIPLE Two Brass Half Cups hold the Membrane The Membrane is hardened Copper Beryllium CMR TRANSDUCER This forms two isolated air tight chambers Total Displacement 10 Pa = 0.015mm Two Coils Sandwich the Membrane Membrane Coils and Membrane are unattached There is a (-) Negative and (+) Positive Coil 10kHz Coil 10kHz Coil A 10kHz Frequency is applied to the coils - + The Coils are precision matched Self Compensating on Temperature Brass Half Cup Brass Half Cup Extremely low zero drift Displacement at 0.1 Pa only 0.00015mm The Membrane always returns to zero Reference Port Long Term Stability and Accuracy Applied Pressure The Metal Membrane is linear in itself The Span is therefore accurate and stable The older the Membrane the better it gets Which means long term repeatability. Proven over 30 Years in Service
STATIC PRESSURE MEASUREMENT CMR TRANSDUCER Pressure is applied to the membrane and moves it away from zero position - + The induction of the coils measures the distance the membrane has moved The frequency change of the coils is translated into 0-10V or 4-20mA Applied Pressure The measurement range is linear STATIC PRESSURE AIR FLOW to the output electric signal
VELOCITY PRESSURE MEASUREMENT CMR TRANSDUCER Impact pressure is applied to the positive port of the transducer. Static pressure is applied to the - + negative port of the transducer The result is a velocity pressure. The CMR electronic converts the Applied velocity pressure velocity pressure into air volume. AIR FLOW Impact pressure Static pressure
PRESSURE CALIBRATION Silicone tube is connected to the test P-Sensor and the CAL95’s positive port and pump. Pressure is applied by turning the pump wheel. The generated pressure is measured by the CAL95 and the P-Sensor. The Voltmeter is connected to the P-Sensor and displays The actual pressure generated in 0…10V or 4…20mA. If the measurement is not equal to the CAL95 the zero and span shall be adjusted until correct
CALIBRATION TRACEABILITY EAL European Cooperation for Accreditation of Laboratories Traceable Calibration Certificates issued in any EAL Laboratory are valid and accepted in all member countries
THANK YOU ALL END

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