2 General
KRONOS 20 9
In case of sensor error, an alarm is given and, if necessary, the system goes in emer-
gency operation or closes the valve, thereby stopping the engine. Internal errors are also
recognized and are saved like all other errors. All errors can be extracted with an exter-
nal handheld programmer or, if the communications software is installed and a cable
available, read out to a PC / laptop computer.
• Communication
Serial interface for the HEINZMANN communications programme DcDesk 2000 or for
a handheld programmer (HEINZMANN communications cable required).
A CAN interface is available for communication with other HEINZMANN control units
and, if adequately configured, allows communication with external devices such as SPS.
In this way the system may be integrated flexibly in a comprehensive engine manage-
ment solution.
• Optional Misfire Detection
As an option, expanded software for misfire detection is available.
2.8 Gas Train
The components of the gas train such as magnetic valve, gas filter and, in particular, zero
pressure regulator constitute a unity in an optimally working system of gas regulation.
HEINZMANN is very experienced in this context and able to design and deliver according
gas train with the according certificate.
In principle, a standard zero pressure regulator may be used. The starting pressure of the
governor must be adjustable within a range from 0 to +25 mm water column (2.5 mbar).
The ideal starting pressure is usually determined with start tests. A good starting value is 5
mm water column. The determined value must be entered in the list of parameters. The
unit of the value to enter is Pa (25 mm H
2
O = 250 Pascal).
Most pressure regulators are subject to wear and sensitive against vibrations. Therefore
HEINZMANN recommends to attach the governor not to the engine but to the frame. The
pressure governor is not included in the standard scope of delivery of the KRONOS 20
system. On request, it can be delivered by HEINZMANN or a specific pressure regulator
can be recommended by HEINZMANN.
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