FAQ’s

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.

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

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

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

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.

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

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

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

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)

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.

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.

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.

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

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

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.

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.

Datum’s bolt-on strain gauge and measurement 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

Datum Electronics’ range of bolt-on strain measurement sensors are regularly used in industrial applications such as Silo Weighing, Tank Weighing, Hopper Weighing, Bunker Weighing, Bin Weighing, Container Weight Verification and Onboard Vehicle Weighing

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

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

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

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

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

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.

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.

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`

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

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.

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

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

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

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

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

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.

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

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%.

There are several ways that this can be done, the simplest and easiest way which doesn’t require any major modifications to the silo, hopper or weighing bin is to use the existing structure and apply the Datum Bolt-On Strain sensors to give simple and accurate torque measurement. Datum Electronics offer a range of smart weighing solutions for silos 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, hoppers or bins in case of potential failure.

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.