Table of Contents
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Table of Contents
Related Manuals for delta-mobrey Mobrey MCU200 Series
Summary of Contents for delta-mobrey Mobrey MCU200 Series
- Page 1 Installation and Operating Manual Mobrey MCU200 Series IP227, Rev DA February 2020 Mobrey ™ Ultrasonic Liquid Level Detection Systems for Interface Applications User Manual Control unit types: MCU201 and MCU203 Ultrasonic gap sensor types: 433SD, 402SD, and 442SD...
- Page 2 Installation and Operating Manual Mobrey MCU200 Series February 2020 IP227, Rev DA General safety precautions The equipment described in this manual has been designed in accordance with EN61010 “Safety requirements for electrical equipment for measurement, control and laboratory use”, and has been supplied in a safe condition.
- Page 3 Installation and Operating Manual Mobrey MCU200 Series IP277, Rev DA February 2020 Avoid unsafe equipment The equipment may be unsafe if any of the following statements apply: Equipment shows visible damage Equipment has failed to perform an intended operation ...
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Page 4: Sensor Installation
Introduction Delta-Mobrey level control systems for sludge blanket and interface detection applications require a Mobrey MCU200 Series control unit and a Mobrey ultrasonic sensor (Figure The start of this manual shows how to install the control unit and supported sensors to form control systems. -
Page 5: Installation Of The Sensor
Installation and Operating Manual Mobrey MCU200 Series IP277, Rev DA February 2020 Figure 2. Sensor in clear water and sludge MCU200 Sensor in sludge Series The ultrasonic beam is attenuated and Controller will not reach the receiver crystal. Sludge MCU200... -
Page 6: Extension Cables
Installation and Operating Manual Mobrey MCU200 Series February 2020 IP227, Rev DA Extension cables Extension cables up to 50 metres long can be fitted to most Mobrey ultrasonic sensors in the factory to special order, but a better site arrangement is to have a separate extension cable. -
Page 7: External Connections
Installation and Operating Manual Mobrey MCU200 Series IP277, Rev DA February 2020 Figure 3. MCU200 housing dimensions Front view Mounting holes 1.015 Bottom view 40.8 External connections Two cables are required per sensor. The RG178 should be used where the cable itself is subject to temperatures exceeding 74 °C. - Page 8 Installation and Operating Manual Mobrey MCU200 Series February 2020 IP227, Rev DA Figure 4. PCB for MCU201 0.5 s DELAY 30 s E = RED E = GREEN DELAY TO E DELAY TO NE OSC. = NE OSC. = E...
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Page 9: Internal Switch Settings
Installation and Operating Manual Mobrey MCU200 Series IP277, Rev DA February 2020 Ultrasonic gap sensor connections The sensor connections on the PCB are labelled “1”, “E” for the receiver crystal and “E”, “2” for the coax cable to the transmitter crystal. The screens of these coax cables must be connected to the terminals marked “E”. - Page 10 Installation and Operating Manual Mobrey MCU200 Series February 2020 IP227, Rev DA the case of non-metallic sensors). If this continuity is broken, the control unit illuminates the “FAULT” LED to indicate the sensor cable is damaged and changes the output relay to the “ALARM”...
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Page 11: Gain Adjustment
Installation and Operating Manual Mobrey MCU200 Series IP277, Rev DA February 2020 This selects the relay change which is subject to the time delay selected on the top switches. When the No.5 green switch is set to the right, the delay occurs between the sensor changing state and the relay de-energising or becoming “not energised”... -
Page 12: Interface Detection
Interface detection Suspended Solids blanket sludge discharge detection The Mobrey MCU200 Series control unit can be used with a Mobrey 433SD sensor to provide sludge-blanket level detection in a settling tank, and assist with the control of an automatic de-sludging process. The Mobrey 433SD sensor is normally suspended in the settling tank. - Page 13 Installation and Operating Manual Mobrey MCU200 Series IP277, Rev DA February 2020 Figure 8. Sludge discharge control A. Mobrey pipe section B. MCU200 Series control unit C. Sludge This maintains the hydraulic pressure on the sludge to prevent release of dissolved gases. Any such air entrained will give a false “thick sludge”...
- Page 14 Installation and Operating Manual Mobrey MCU200 Series February 2020 IP227, Rev DA – Check the setting in practice by taking a sludge sample at the switching point, and adjust as necessary. Increasing the gain makes the switching point occur at a higher percentage of suspended solids.
- Page 15 Installation and Operating Manual Mobrey MCU200 Series IP277, Rev DA February 2020 Figure 9. Mobrey 402 sensor as oil/water interface MCU200 Series Sensor in oil Controller The ultrasonic beam is attenuated and will not reach the receiver crystal. Sensor in water...
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Page 16: Maintenance
Installation and Operating Manual Mobrey MCU200 Series February 2020 IP227, Rev DA Figure 10. Interface detector by reflection method MCU200 Series Controller Water MCU200 Series Controller Water Maintenance Safety maintenance: This is limited to periodic inspection by a qualified person to ensure that the installation including wiring and equipment housing is safe. -
Page 17: Specifications
Installation and Operating Manual Mobrey MCU200 Series IP277, Rev DA February 2020 – Check for correct sensor operation whenever the gain is adjusted away from the normal set point. Assume an overlap of 2 divisions between the “LO” and “HI” gain ranges. - Page 18 Installation and Operating Manual Mobrey MCU200 Series February 2020 IP227, Rev DA Indicators: Red for alarm, green for normal, yellow for a cable fault. State: Green or red indication is selectable for either sensor state. Sensors All Mobrey ultrasonic gap sensors are supported.
- Page 19 Installation and Operating Manual Mobrey MCU200 Series IP277, Rev DA February 2020...
- Page 20 Riverside Business Park, Dogflud Way Farnham, Surrey, GU9 7SS +44 (0)1252 729140 Terms and Conditions of Sale are available upon request. +44 (0)1252 729168 All other marks are the property of their respective owners. mobrey@delta-mobrey.com © 2020 Delta Mobrey Ltd. All rights reserved.
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