Chris-Marine maintenance machines for diesel engines
for use on board, at power plants and in workshops
The LDM is used for making a quick investigation of the liner condition in liners for 2-stroke engines.
The main advantage is that the cylinder head does not need to be removed.
The instrument is inserted in the liner through the scavenging ports. Removal (and assembly) of head does not only takes several hours,
it is also a risk of not getting it completely correct back again.
By using the LDM a correct result is achieved quickly without increasing the risk of introducing an error.
2 EC declaration of conformity
Due to included radio transmitter components special tests must be carried out to meet respective countries standards.
At this moment the LDM has a CE-label which is required for use within EU and Turkey.
Further tests will be carried out for verifying compliance with other standards, of which the most immediate are:
USA, Japan, China and Korea.
Please revert to us with queries about the time schedule for these tests.
3 The measurement process:
Calibrate the system
Put the piston in its lowest position
Attach the piston height measurement device to the underside of the piston
Insert the measurement device and place it on top of the piston
Move the piston to desired position and carry out the predefined number of
Move piston to next position and measure diameters again
Continue until finished
Evaluate the measured data in the handheld terminal or transmit measurement data to a PC for further evaluation, storing or report generation
Approximate measurement time:
Total time about 1 hour per liner for measurement of 4 diameters on 9 heights (of which setup time is about 20 minutes)
The system accuracy is 0,03 mm
5 LDM consists of the following parts:
Inserted to the liner and put on top of the piston. Measured data is transmitted via radiolink to an antenna inserted in the start air valve. The antenna is connected to an interface box
Piston height measurement device:
Attached underneath the piston with a magnet. A cable connection to the interface box
Input signals: Antenna and Piston height measurement unit
Output signal: Bluetooth to a handheld computer (PDA)
Stored data can be transferred to an excel application in any PC by Bluetooth, USB or by SD-card
In addition there are tools for calibration of the system.