Operation & Installation Manual V12-V6 2010-05-31.doc
31/05/2010
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The compartment on the left side contains the power supply / RS485 module. Two RS 485
serial communication ports and the power supply are integrated on this circuit board. Space
is available to accommodate an optional printed circuit board for future expansion of
functionality.
External connections are made using edge connectors with screw terminals that connect to
the printed circuit board.
2.3.5. Main Board Assembly
The main part of the signal processing consists of a number of printed circuit boards
packaged in a carrier frame. The boards contained in this frame are:
•
an input / output board
•
the main processor board
•
the sensor driver board
Attached to this frame is also the LCD display module (at the front).
The front compartment contains guides that allow the frame to slide into or out of the
enclosure (when the cover is opened and after releasing the bolts).This unit connects to a
printed circuit board in the back of the compartment. From this back plane the wiring
connects to the other compartment and the main terminal block.
The cabling from the transducers in the meter body enters the front compartment of signal
converter housing through an Ex(d) wire bushing built in the foot (support) of the enclosure
(Figure 2-11).
Figure 2-11: Ex d wire bushing
2.4 Software.
2.4.1. Configuration file.
The ALTOSONIC V12 contains a powerful microprocessor that controls the functions and
calculations it performs. The microprocessor executes program code consisting of several
modules, according to the functions it has to perform. By means of an extensive set of
parameters the software can be configured to various sizes and models of flow meters and
according to specific requirements depending of applications or customers.
The parameters are stored in a configuration file, when this file is prepared a checksum is
appended to it. When the file is loaded in the microprocessor system the checksum can be
inspected to check that the file is not corrupted. Once loaded the checksum allows a
verification that no modifications have been made since it was prepared and loaded.
Configuration parameters are password protected in order to prevent unauthorized
modification. Access in order to read, view and inspect parameter values is unrestricted.
