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MRU 3


 
General 
Product Name:MRU 3
Product Description:Operating vessels at sea is, by its very nature, a highly challenging activity. In order to undertake tasks such as wave height monitoring, using cranes during rough weather, or determining where vessels are using dynamic positioning, roll, pitch, yaw and heave motion needs to be measured. This is where Motion Reference Units (MRUs) come in and Kongsberg has been a leader in this field for over 20 years.
Height [m]:0.14
Width[m]:0.105
Length[m]:0.105
Weight[kg]:2.4
Weight in water [kg]:
Material :Anodised aluminium
Power 
Min. Voltage (AC):
Max. Voltage (AC):
Min. Voltage (DC):10
Max. Voltage (DC):36
Power consumption [W]:5.5
Environmental 
Min. operating temperature [°C] :-5
Max. operating temperature [°C] :55
Splashproof casting:Y
Water resistant casting :N
Water resistance [m]:
Vibration and operating shock tolerance : IEC 60945/EN 60945
Electromagnetic compatibility :IEC 60945/EN 60945
Mounting orientation :Connector must be pointing up or down.
Roll and Pitch Output 
Roll and pitch measurement:Y
Angle accuracy static in ° [RMS]:0.08
Angle accuracy dynamic in ° [RMS]:0.08
Resolution angle [°]:0.001
Angular roll/pitch range [°]:45
Angular rate range [°/s]:100
Max. rotation speed [deg/s]:
Heave Output 
Resolution heave [m] :
Samples p/second:
Max. output heave range [m]:50
Output period real time [s]:0
Heave accuracy real time [%]:5
Output period delayed [s]:
Heave accuracy delayed [%]:5
Acceleration Output 
Acceleration measurement:Y
Acceleration range m/s2 :50
Acceleration noise m/s2 RMS:0.005
Acceleration accuracy m/s2 RMS :0.02
Interfaces and Data 
Ethernet port:Y
RS232 output:Y
RS422 output:Y
Other output ports:Three output and one input: Bidirectional RS-422 from junction box, user configurable RS-232, RS-422.
Data output rate:200 Hz, Ethernet UDP/IP 10/100 Mbps
Data output protocols/formats :The MRU 3 outputs roll, pitch and heave together with linear acceleration in 3-axes. The MRU 3 outputs heave position and velocity. In addition roll and pitch angles and corresponding angular rate vectors are output.
Velocity input data and formats :The MRU 3 outputs roll, pitch and heave together with linear acceleration in 3-axes. The MRU 3 outputs heave position and velocity. In addition roll and pitch angles and corresponding angular rate vectors are output.
Heading input data and formats :The MRU 3 accepts input of external speed and heading information on separate serial lines or Ethernet for improved accuracy in heave, roll and pitch during turns and accelerations. For time synchronization the MRU accepts 1-second time pulse (1PPS) input on a TTL line (XIN) or as RS-232/422 signal.
 


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