Transport Shock Monitoring

MONI LOG® Offshore alarm system

MONI LOG® Offshore alarm system

Rugged shock monitoring for platforms

  • Registers mechanical influences with the installation / operation of offshore plants
  • Highly sensitive and long-term stable acceleration sensors
  • Measures and analyzes directions, strength, time, signal response of shock and vibration loading
  • Alarm and operating signaling contacts for the integration of the system into the control technology
  • Combi-sensor for temperature, air humidity and pressure
  • Robust and reliable, even under extreme climatic conditions
  • Easy operation, display, alarm function and long operating time
  • Powerful analysis software
  • Tamper-proof, multi-level password protection
  • Internal batteries for automatic function retention in case of power failure

Cold, storms, wave impact and docked ships place extreme loading on the platforms and the electrical equipment of offshore wind parks. The transformer substation as a core item decides the efficiency and reliability of the overall system. Shocks, vibrations, air humidity and temperature must be monitored continuously in order to preclude damage.

The MONI LOG® ShockDisplay curve plus Offshore Alarm System is designed for such employment. Highly sensitive sensors monitor and register mechanical influences in real time, with direction, strength, time, duration, minimum and maximum levels. The minimum shock duration is configurable and registration and alarm thresholds can be adjusted separately for each of the 3 space axes. The number of cases of shock and extraordinary loading can be read off directly on the logger, where limit overshoots are indicated by alarm and operating signals, as well as live contacts (Protection Class III), on the control technology of the platform. The system is fixed-installed and works network-linked. Internal batteries guarantee function in case of grid failure. All stored measured values are maintained for years.

The MONI LOG® ShockDisplay curve plus, with consistent monitoring and properly processed measuring data, ensures quality and verification, both in the installation as well as the operating phases of transformer substations. It enables rapid reaction in case of faults, for example the shutdown of components in case of overshooting limit values. The electronics in the stainless steel housing are installed at the node points of the platform and directly at important shock- sensitive, electrically-operated resources.

Measured data indicates how a shock expands from a predetermined location of the offshore platform and influences the equipment. With 4 keys the device is simple to control. A USB interface makes possible fine configuration and data transfer to the PC/laptop.

The device status is exactly reproducible because every activity which is relevant for the measured value recording is registered. Manipulations on the device are excluded with password protection, internal storage support, checksums and the protocolling of all procedures. The convenient SYCUR software for the adaptation and analysis of the data is included.

Technical data
Shock measured value recording: 100 events with the largest amplitude, 3-dimensional (X/Y/Z), storage also as a signal characteristic with 1024 ms duration at 2 kHz sampling rate, measuring range 5, 10 20 or 50 G, as well as special versions, frequency range 1 … 512 Hz (3dB, digital frequency filter, 4th Order Bessel), registration threshold adjustable for minimum shock duration and for every shock direction
Inclination measured value recording: -1g to +1g corresponds to -90° to +90° angle of inclination, in addition 64 acceleration curves in the range -6g to +6g in 3 spatial axes, dynamic range 0 – 1 Hz, measurement interval adjustable in minutes, recording duration up to 16,000 measurement intervals, self-calibrating with respect to earth axis
Measured value recording Temperature:
Factory-calibrated, multi-purpose sensor
-40 to +85° C, resolution 0.1 K, precision ±1 K,
0.2 – 100 % rH, resolution 0.1 % RH, precision ±3% RH (20 – 80 % rH), ±5% RH (0 – 100% RH), 260 – 1260 mbar, resolution 1 mbar, precision ±1 mbar (T = 25°C), ±2 mbar (0°C to +80°C)
Display and control elements: illuminated display and four function keys, multilingual (DE, EN, FR), password-protected menu
Interfaces: USB 1.1 and RS-232 for connection with a PC for configuration and assessment
Housing, weight and dimensions: lockable stainless steel casing, Protection Level IP 65, 11 kg, 300 x 300 x 190 mm
Operating / Storage conditions: -20 … +40°C, max. 95 % relative humidity, non-thawing, special solutions for higher demands on request
Interface conditions: Voltage supply: 90 – 250 V AC or 120 – 250 V DC, 100 mA, 47…63 Hz, fuse T 1 A L 250 V, connection to N and L polarity-independent
Add. consumer: maximum permissible continuous current 8 A (loop through)
Fusing: 6 A l.v.h.b.c. supply line fuse-protection required
Relay contacts: Coil contact insulation voltage 2.5 kVrms Switching capacities max. 300 V DC, 250 V AC
6 A max. AC current rating
Connection cable: 0,25 mm² to 4 mm²
Power supply internal: 2 cells of construction design D (R 20) of type alkaline or lithium, operating time up to 6000 h
Fixed parameters: Measuring ranges 5, 10, 20, 50 G (special design on request), filter characteristic of the digital frequency filter to 512 Hz
Programmable measuring parameters: Registration threshold from 5% of the measuring-range end value, min. period of event from 1 ms, alarm threshold for shock amplitude, registration threshold for inclination measurement, password, switch on/off protection, time
Software: For operating systems Windows Vista/7/8/10, signal analysis graphic and tabular with export functions, frequency analysis according to DIN EN 13011, parameterization of the devices, indication of the status data and active time periods of the device, help function, multilingual (DE, EN, FR)