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DK-200 On-Line Cylinder Pressure Analysis

The DK-200 Engine Surveillance system is the latest innovation from Icon Research. It is a powerful combustion system that allows you to continuously monitor your engines and have any issues alerted as they happen.

The system has been developed with complete engine surveillance and flexibility in mind. As such, 24 input channels are available which allows the addition of inputs from other instrumentation to read parameters such as exhaust temperature, vibration inputs and fuel flow/temperature simultaneously with cylinder or fuel pressure readings.

Installation is simple with all hardware contained in a single rugged box. A full colour touch screen makes setup easy and provides “easy to view” status screens in the engine room. All input data is gathered at the front-end, is processed and fed to an Ethernet link going to a hub which can network multiple systems. The hub is connected to a PC in the control room which runs the software application to display and diagnose engine reading from one or more DK-200’s in real-time.

An overall summary screen displays the status of all engines being monitored with a traffic light system using pre-determined programmable thresholds. If an issue is identified the user can “drill-down” to examine a specific engine or cylinder exhibiting a problem.

DK-200 Engine Surveillance system diagram
DK-200 Engine Surveillance system display
DK-200 Engine Surveillance system unit

Ease of Use

On-line systems can be set to record readings automatically at pre-set intervals, can be set to give a reminder to record a test set, or a snapshot can be taken at any time by the click of a button. Meanwhile the system monitors the engine(s) 24/7 and a visual display is available at all times. Readings can be transferred into the same software package as used by the portable Doctor.

Sensors and Pickups

To ensure the highest accuracy, especially for calculated power, only the highest quality sensors and pickups are used. The high accuracy pressure sensors have high temperature resistance and a long and stable operating life.

A number of mounting solutions are available for the permanently fitted pressure sensors.

These include a range of adapters that fit under the indicator valves as well as dual-port indicator vavles to which the pressure sensor can be fitted while leaving the Thompson adapter thread free for other temporary connection.

Twin inductive crank pickups eliminate the effects of speed variation for the highest accuracy on main engines. Single inductive crank pickups give an economical oil and dirt immune system for generators and auxiliary engines.

Installation & Commissioning

Installation and commissioning services are available through Icon and there are agents in several locations throughout the world who can supply installation and commissioning services.

However, installation is quite straightforward and can be handled by local contractors and, in some case, the ship’s crew.

Detailed instructions are provided together with start-up and commissioning notes.

Most of Icon’s customers self-start their Doctor systems. This is the most cost effective solution. Clear instructions for installation of the software are provided.

To assist with initial setup of the software, a database set-up service is available. When this option is purchased, the Doctor system is delivered with a blank database for the ship. Initial results are then emailed back to Icon for the trigger angle correction. This option is the most cost effective and fastest way to start up a Doctor on-line system.

There is no need to wait for a convenient port or short sailing where an engineer could attend the vessel, and the corrected database file is normally emailed back to the vessel within a couple of days of the initial readings being taken.

On-Line Analysis Software

On-Line Analysis Software
On-Line Analysis Software

The DK‐200 is supported by a comprehensive software application that displays measurements from one or more DK‐200’s in real time. Displays are configurable depending on the engine(s) being monitored, for example, number of cylinders, measurement types etc.

The software can display an overall summary of the status of all engines using a simple “traffic light” summary. All green means that all measurements are with pre‐determined limits. Yellow means that a measurement is slightly outside and should be checked, and red means that a close look should be taken. Clicking on a particular engine displays more detail. Going further down the hierarchy enables graphs and tables of single and multiple engines to be displayed in real time.

The DK‐200 on‐line software incorporates the popular Doctor V6 module. This provides the full graphic and tabular displays available in V6. Importantly, it includes the Diagnostic option which means that instant diagnostics can be displayed for each measurement set as it comes in from the DK‐200 over the network. This enables users to track in real time what may be happening on their engines.


Setting up the DK‐200 to take the desired measurements could not be easier. Engine configurations and measurement settings are defined in the on‐line software and a simple ‘drag‐and‐drop’ operation sets up the DK‐200.

Users will find many similarities between the on‐line and portable versions of the software, enabling easy familiarisation with the already highly intuitive features.

Overall Screen

The Overall screen shows the status of all engines that are being monitored, enabling a summary of all of the engines being monitored to be seen at a glance. From here, you can view the details of any particular engine on a cylinder-by-cylinder basis.


Table Screen

The Table screen shows the values of pre-selected scalar values on a cylinder-by-cylinder basis, enabling a quick comparison of values to be seen. Values in the Table screen can be directly read parameters such as Pmax and angle of Pmax, or derived (calculated) values such as MIP and power.

Bargraph Screen

Selected parameters can be viewed as bargraphs on a cylinder-by-cylinder basis for a graphical comparison of selected parameters. Bargraphs are colour-coded depending on the alarm status of each cylinder.

Trend Screen

The Trend screen shows trend values for various parameters for multiple cylinders, allowing quick comparison of historical values.

Similar information is available in the Histogram screen where bar graphs present the data in an easily understood format.

Analysis Screen

The Analysis screen shows live traces for the cylinders and it is possible to use many of the features that are available in the Doctor Version 6 software, including data set selection, zooming, cursors, alternative trace types (pressure-angle, P-V diagrams and rate of change of pressure plots), and instant diagnostics.

Traces can be viewed live and will show exactly what your engine is doing in real time. Scalar data may be stored (such as the trend values) may be stored at a more frequent rate than trace data if required to save on memory in the PC.

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Email: Tel: +44 (0)1506 885000