delta-mobrey Mobrey 402SD Page 1 Installation And Operating Manual Download

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Installation and Operating Manual

IP227, Rev DA

Mobrey MCU200 Series

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

Summary of Contents for Mobrey 402SD

Page 1: ...anual IP227 Rev DA Mobrey MCU200 Series February 2020 Mobrey Ultrasonic Liquid Level Detection Systems for Interface Applications User Manual Control unit types MCU201 and MCU203 Ultrasonic gap sensor...

Page 2: ...ctions must have a current rating of 25 A AC supply Never operate the equipment from a line voltage or frequency in excess of that specified Otherwise the insulation of internal components may break d...

Page 3: ...is connected to its supply the opening of covers or removal of parts could expose live conductors The equipment must be disconnected from all power and signal sources before it is opened for any adjus...

Page 4: ...MCU200 controller B Mobrey 402SD sensor C Mobrey 442SD sensor 2 Sensor installation 2 1 Safety matters Review all the safety information at the front of this manual 2 2 How ultrasonic gap sensors wor...

Page 5: ...ther side of the gap In this orientation the switching level is half way up the sensor face If the sensor is mounted from the side of the tank the switching level is normally on the centreline of the...

Page 6: ...cable runs separated by 0 15 metres to minimise cross talk If several sensor cables are being run together then all the transmit cables those connected to E2 should be grouped together and all receive...

Page 7: ...ified A suitable switch or circuit breaker must be included in the installation and this should be in close proximity to the equipment and marked as its disconnecting device A suitable fuse rated at 3...

Page 8: ...be used in all applications DPCO Double Pole Change Over relay connections There are two sets of contacts If the relay is connected to hazardous live mains circuits External circuits e g signal circu...

Page 9: ...de switch is labelled FREQ and is located between the sensor terminal block E 2 and the Aux Input terminals This switch selects the operating frequency of the MCU200 oscillator which is either 3 7 MHz...

Page 10: ...tory position is to the right for all switches OSC sensor oscillating E relay energised NE de energised Note Slide switches are adjustable using a pencil Ex factory settings are with all switches to t...

Page 11: ...tch number 4 to the right E GREEN Figure 6 Example time delays for state changes A 2 seconds B 8 seconds C 30 seconds 4 Applications 4 1 Gain adjustment Correct adjustment of the gain is essential for...

Page 12: ...nsor is normally suspended in the settling tank Similarly the control unit can be used with a Mobrey sludge pipe and a pair of 488S sensors to control the end of a de sludge cycle when thin solids are...

Page 13: ...ercentage Settled sludge discharge control Reduce the timedelaysetting tomakeadjustments easier See RelayoutputandLEDlogic selection on page 10 for details Set the operating frequency on the control u...

Page 14: ...Viscous liquids emulsions and liquids containing solid particles have a greater ultrasonic attenuation than clear liquids This technique is used to detect which liquid is present at the sensor e g th...

Page 15: ...t is split at the interface into reflected and a refracted beams so that it does not reach the receiver crystal If there is no interference in the gap but only one liquid the beam is received and the...

Page 16: ...can be then checked by linking the two terminals both labelled as E on the sensor terminals This should stop the Fault LED illuminating If the sensor is giving incorrect indications check the gain se...

Page 17: ...by linking the sensor terminals 1 and 2 with a wire to simulate an oscillating sensor 7 Specifications 7 1 MCU201 Power supply 110 120 10 220 240 10 50 60 Hz Installation categories II IEC60664 for 23...

Page 18: ...ensors are supported A switch on the PCB selects the electronics to operate at 1 MHz or 3 7 MHz Cable check option is supported for some sensors External input Available for keeping the relay de energ...

Page 19: ...19 Installation and Operating Manual IP277 Rev DA Mobrey MCU200 Series February 2020...

Page 20: ...y Limted Riverside Business Park Dogflud Way Farnham Surrey GU9 7SS 44 0 1252 729140 44 0 1252 729168 mobrey delta mobrey com Terms and Conditions of Sale are available upon request All other marks ar...