• What are the installation and calibration requirements for Datum’s marine shaft power meters?

    A typical installation and commissioning cycle takes 1-2 days and there is no further calibration required.

  • What supply voltages are required by Datum Electronics marine shaft power meters?

    Datum Electronics’ marine shaft power meters can be specified to work with all common supply voltage standards, for example single or triple-phase AC at 110-230V, or 12/24V DC.  They all have IP67 envioronmental sealing and can operate at a wide range of temperatures from -15 to +80 celsius

  • Why should I choose Datum Electronics marine shaft power meters?

    Datum’s range of marine shaft power meters have been designed specifically to meet the requirements of commercial marine customers to provide real time and ongoing power monitoring data on ships. With a modular design suitable for shafts of varying sizes from 150mm to over 1100mm, these maintenance-free contactless devices are extremely reliable.

  • What is required to verify the performance improvement of an ESD?

    It is recommended to carry out a model test to predict the performance improvement of the ESD before installation. This model test result will then be used for the calculation of the attained EEXI. The decision about the installation of an ESD should be based on a model test or CFD prediction.

  • May EPL lead to other operational issues such as increased vibration?

    Yes. In most cases, limiting the power range goes along with a limitation of the operational revolution range. The new operational revolution rate may cause resonance conditions, resulting in increased structural or machinery vibrations. Higher vibration levels may lead to crew discomfort, structural damages and machinery failure. If power limitation is realized by deactivating cylinders, this will completely change the engine’s dynamics, requiring a new assessment of shaft torsional vibrations and of shipboard vibration due to changed firing frequency, as well as of modified excitation forces and moments. Please contact us again to assess the specific risk for your vessel.

  • What kind of document/proof is required after the EPL has been carried out?

    The following documents should be submitted: EPL Report (by engine manufacturer) Survey statement by class surveyor after EPL installation, EPL Management Plan

  • Would an installation of a diesel-electric engine exempt my vessel from EEXI?

    Yes, except if it is an LNG carrier or cruise passenger ship.

  • How about engines which are already derated? Can this engine be limited to an even lower level?

    You could further limit your engine output, for instance for a second time, if necessary to fulfil the requirements by installing Datum Electronics Shaft Power Meter and EEXI Control Panel Interface. Unlike rigid engine limiters, Datum’s EEXI system allows the vessel Master to retain full control of the engine output (for instances where safety is paramount, as defined by SOLAS), whilst still providing the essential data to support the regulatory needs.

  • What about Ice-classed vessels which have certain requirements regarding minimum speed in ice?

    All requirements regarding the applicable Ice class have to be considered. If it is not possible to fulfil both, Ice class and EEXI requirements, additional measures have to be considered.

  • Are there certain rules or requirements by flag states or class when limiting the engine?

    Classification societies may have certain rules in place for engine limitation (e.g. if Ice class is applicable to your vessel). Please check with your respective classification society individually.

  • Is an EPL the only way to improve the EEXI?

    No – Shaft power limitation, Propulsion optimization and Energy-saving can be realised with the installation of Datum Electronics Shaft Power Meter and EEXI Control Panel Interface (Bridge mounted)

  • What is the timeline for the re-issuance of the IEE Certificate?

    The IEE Certificate is re-issued with the first annual survey after 1 January 2023.

  • Will this approval have an impact on statutory certificates?

    Yes, after approval of the EEXI Technical File by the ship’s classification society, the IEE Certificate will be re-issued

  • What documents are to be submitted for class approval?

    You need to submit an EEXI Technical File to your classification society. DNV’s maritime advisory offers support by preparing such documents for you.

  • What is the required EEXI which my vessels have to fulfil?

    The required EEXI is based on the EEDI reference lines, with the below listed reduction factors applied. This is in most cases equal to the required EEDI in Phase 2 or Phase 3.

  • Can I use any class to approve/verify the EEXI or do I need to use the vessel’s class?

    The approval of the EEXI Technical File and the issuance of the IEEC has to be performed by the respective classification society.

  • Will EEXI requirements change in the near future?

    There will be an IMO review of the data in 2026.

  • Which vessels does the EEXI apply to?

    The EEXI must be calculated for all cargo and cruise vessels above 400 GT falling under MARPOL Annex VI. In case of non-conventional propulsion (such as diesel-electric), please see MARPOL Annex VI for further clarification. In case of a major conversion, the EEXI must be recalculated. A required EEXI is applicable for all cargo and cruise vessels above a certain size threshold, depending on the ship type.

  • Do I have a time frame for being compliant? Such as the next annual survey?

    The EEXI Technical File must be approved and the International Energy Efficiency Certificate re-issued by your flag administration or Recognized Organization at the first annual survey after 1 January 2023 at the latest.

  • What will be the improvement measures for my vessel?

    Different improvement measures are possible, e.g. Engine power limitation, Shaft power limitation, Engine derating, Propulsion optimization, Energy-saving devices, Please get in contact with DNV’s maritime advisory for a ship-specific evaluation.

  • When will the EEXI enter into force?

    The EEXI was  adopted at MEPC 76 in June 2021 and will enter into force on 1 January 2023.

  • What is EEXI?

    The Energy Efficiency eXisting ship Index (EEXI) is a new IMO regulation that aims to reduce CO2 emissions of existing vessels by setting minimum requirements for technical efficiency. EEXI comes into force on 1 January 2023.

  • Can Datum’s standard strain gauges provide temperature compensation?

    Yes – our 3-hole bolt-on strain gauge can provide temperature compensation, along with a live continuous data stream to a vehicle’s systems

  • What are the most common applications for Datum’s off-the-shelf strain sensors?

    Datum Electronics’ range of bolt-on strain sensors are regularly used in situations such as silo weighing, tank / hooper / bunker weighing, onboard vehicle weighing and many more industrial applications

  • Why should I choose Datum Electronics strain gauge sensors?

    Datum’s bolt-on strain sensors have been developed to suit the harshest of environments – they are robust and water-resistant, and can be installed without soldering or special adhesives

  • Why should I work with Datum Electronics on my OEM strain sensor designs?

    Datum Electronics provides high-quality, cost-effective products in volume, built to your specific requirements for your unique application

  • Why would I need a custom built strain gauge sensor?

    Common reasons why Datum Electronics is commissioned to design and supply custom bolt-on strain sensors include specific IP ratings, bespoke integration methods, unusual physical package design and so on

  • Does Datum Electronics offer custom designed bolt on strain sensors?

    Yes – for many years we have been working with companies large and small across the globe to design, prototype and deliver strain gauge measurement solutions

  • How can I confirm the power that my engine is delivering on my boat

    The Datum Electronics SPMK system can be quickly and easily installed onto the propellor shaft taking up minimal space in less than 30 minutes to accuractley measure the power which can be completed by end user with our simple kit

  • How can I verify and prove my engine power for my EU fishing licence?

    This can be done temporarily using a temporary shaft power measurement system which installs direct to the propulsion shaft and running engine tests to full power.  The data can be logged and stored as evidence.  The Datum Electronics Shaft Power Measurement Kit is the kit of choice by many EU fishery agencies and is simple, easy to install to prove your engine power unobtrusively and without the need of a team of technicians as it has been designed to be installed direct by customer.  The SPMK system can be installed in less than 30 minutes and removed from shaft after your tests are done with a log file for you to keep.

  • How can I measure the weight of my silo?

    A: There are several ways that this can be done, the simplest and easiest way which doesn’t require any major modifications to the Silo is to use the existing structure and apply the Datum Bolt-On Strain sensors to these to give simple and accurate torque measurement.  Datum Electronics offer a range of smart weighing solutions for Silo’s giving customers real time accurate information which can include visuals of load status and alarms for when Silo levels are low.  These can also be used in a preventative state as the Bolt-On Sensors will look at the strain levels on the Silos in case of potential failure.

  • how can I measure accurate power in my test rig when there is no room to add an inline transducer?

    You can use existing components to become an accurate inline torque transducer, Datum Electronics FF425 transducers are a range of flanged coupling spacer transducers that can replace your existing coupling spacers and give you real time accurate Torque, Speed and Power data from our standard range.  Our specialist team can even work with you and the existing spacers that you have and turn these into Torque Transducers.  With Datum Connect you can use your smart phone or smart device to wireless view and log accurate Torque, Speed and Power seamlessly.

  • What is the smallest torque that you can measure?

    Our standard RS425 Size 1-Al is a 0-3Nm transducer which will give an accuracy of better than 0.1% of the full scale allowing for measurement in the Ncm range.

  • What if I don’t know my maximum torque measurement load?

    Datum Electronics torque sensors have a safety factor built into them for 150% overload protection. Our technical sales team will be happy to work with you to help you choose the right sensor

  • How can I work out the Torque for my test, I only have the Motor Speed and power?

    Datum Electronics Ltd can work with the customer to calculate the expected torque using known measurement principle and suggest an appropriate torque sensor for you like our M425`

  • Why would I need to measure the torque for my helical screw pile installation?

    This is needed to prove the integrity and correct successful installation of the screw pile, the Datum Auger Hawk system is quick and easy to install and will show accurate Torque in addition to other useful information like Angle, Thrust, RPM, rotations and monitor depth all in one easy app for your smart phone.  The data can be logged and saved for later use if needed for verification purposes

  • What sample rates does Datum Electronics’ M425 Rotary Torque Transducer offer

    The M425 sensors from Datum can provide sample rates from 1 to 4000 per second and are user-selectable

  • What applications can Datum’s M425 Rotary Torque Transducer be put to?

    The Datum M425 Torque Sensor is widely used for motor, gearbox and pump torque testing, and represents the ultimate tool for anyone looking to accurately measure torque, power and speed with high accuracy and repeatability

  • What is the measurement range of the Datum Electronics M425 Rotational Torque Transducer?

    The M425 Rotary Torque sensor from Datum Electronics has a torque measurement range from 0-10Nm up to 60,000Nm as standard

  • What is the accuracy of the Datum Electronics M425 Rotary Torque Sensor?

    The M425 Rotational Torque Transducer from Datum Electronics offers high accuracy to 0.1%

  • How is the Datum RS425 Contactless Torque Transducer installed?

    The Datum RS425 Torque Sensor is designed to fit in-line with any drive train or test rig, using a spline or a key-way shaft.  It offers zero bearing friction and is suitable for both high speed and high torque installation.

  • What is the measurement range of the Datum Electronics RS425 Contactless Torque Sensor?

    The RS425 from Datum can measure torque from 1nm to 500,000nm giving highly accurate and reliable measurements

  • How to measure PTO power in real time?

    The Datum Electronics PTO Connect easily fits inline between the tractors PTO shaft and your farming implement, allowing you to measure the actual power.  The PTO Connect talks direct to your smartphone or tablet to show and log live accurate Torque, Speed & Power data with an accuracy of better than 1%.

  • How can I measure the weight of my silo?

    There are several ways that this can be done, the simplest and easiest way which doesn’t require any major modifications to the Silo is to use the existing structure and apply the Datum Bolt-On Strain sensors to these to give simple and accurate torque measurement.  Datum Electronics offer a range of smart weighing solutions for Silo’s giving customers real time accurate information which can include visuals of load status and alarms for when Silo levels are low.  These can also be used in a preventative state as the Bolt-On Sensors will look at the strain levels on the Silos in case of potential failure.

  • What solutions can Datum Electronics offer to help me measure the torque on my helical screw pile installation?

    Datum’s Auger Hawk system is designed to allow helical screw pile operators to be able to record and prove the integrity and correct successful implementation of their machinery.  Quick and easy to install, Auger Hawk will show a range of parameters such as Torque, Angle, Thrust, RPM and depth monitoring all in one simple smartphone app.  Data is logged and can be stored in a database for later retrieval if required for monitoring and verification purposes.

  • How can I verify and prove my fishing vessel’s declared engine power to ensure licence condition compliance?

    This can be achieved using Datum Electronics’ Shaft Power Management Kit (SPMK) – a temporary declared engine power measurement system which installs directly onto the fishing vessel’s propulsion shaft – with the test data logged and stored for use as evidence.  The SPMK system is designed to be easily installed by the end user in under 30 minutes, then quickly removed again after running an engine test to full power and logging the results in kW.  The Datum SPMK system generates test results accepted by the MCA, MSEVT and many other EU fishery agencies for the purposes of fishing vessel licencing.