KROHNE CARGOMASTER User Manual

Page 7

CARGOMASTER®5

7 - Operators Manual

A brief system overview

Mechanical/Electrical

A complete CARGOMASTER® system includes quite a few components.
There are both mechanical and electrical parts, as well as computer programs
involved in the process of monitoring the various tanks on your vessel. (See
Fig. 1) presents the most common parts of such a system, and indicates a few
different options. CARGOMASTER® is a modular system so all these options
may not be configured and installed on your vessel.

A few words on some of the various system parts:

CCU

: Short

for

CARGOMASTER®

Computer

Unit

Ordinary PC type computers, however configured and
type approved for maritime use. Normally, these
computers are powered via an

UPS

–

Uninterruptable

Power

Supply

. A laser printer is also handy, and is

needed in order to get printed reports. In order to
retrieve gauging data, the CCU needs to be connected
to the

SCU

Short for

Signal

Control

Unit

. This is where all data is

collected from the various transmitters or gauges and
forwarded to the CCU.

Other

systems

CARGOMASTER® supports an array of protocols to
communicate with other vessel systems, usually trough
a RS232 or 485 serial interface.

Gauges

CARGOMASTER® can utilize a variety of
sensors/transmitters, primarily the native
CARGOMASTER® types. The range includes
ballast/line pressure sensors, the combined
pressure/temperature cargo sensors, radar transmitters,
various temperature transmitters, and various 4-20mA
transmitters. CARGOMASTER® can also retrieve
data from 3

party systems.

Junction boxes

Some of the CARGOMASTER® junction boxes,
normally the ones fitted on cargo tanks, host electronic
equipment like AD cards. The boxes are designed to
withstand rough weather conditions, and should not be
opened except for required servicing. Also boxes
placed inside trunks, engine room etc. may have
electronics inside. Please consult the electrical
drawings for the system installed on your vessel for
further details.

cards

: The

Analogue

Digital

cards, commonly placed in the

various junction boxes, converts analogue signals from
the cargo and ballast sensors into digital data and