10
INSTRUCTIONS FOR USE
EN
Compression test
A six-bar chart will be displayed in the screens of the compressometer for petrol engines and of the compressome-
ter for diesel engines. The six bars can be used to measure up to six cylinders. Pressing the blue button indicating
the cylinder number will allow the cylinder that needs to be measured to be selected at any time. The selected
cylinder can be recognized by the arrow at the right of the bars.
The reading values thus obtained can be erased at any time by pressing the “Reset” button.
Once the measurements have been completed, you can press the “Save” button, so that they can be stored and
then sent to a computer via USB connection.
Press on the cross on the top left to go back to the main menu.
High pressure common rail test
Additional kit 1464AP is required to measure high pressure in the common rail circuits. To use the kit, follow the
relevant instructions.
What is the common rail system?
What is the common rail system?
The common rail system is one of the most advanced diesel fuel injection systems, based on the fuel injected
directly into the cylinder (direct injection) at high pressure (300 ÷ 2000 bar).
One of the great advantages of this new system lies in the fact that the nozzles are controlled electronically; so
an electronic unit decides what the exact amount of fuel needed by the engine is and sends an electrical system
to the injectors to open the nozzle. The fuel pressure in the common rail then passes into the cylinders through
the nozzles. The name common rail comes from the fact that the injectors are all connected to a common rail.
The injection system is divided into two distinct parts: the low pressure circuit and the high pressure circuit.
The low pressure circuit is responsible for getting fuel to the high pressure pump in optimal conditions of pressu-
re, filtering etc.
This tester allows the whole pressure circuit to be checked; the largest number of failures are produced in this
low pressure circuit.
