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7.6 EXPLANATION OF THE MENUS
7.6.1 Home menu
By touching the <Home> key in the top left corner you will be guided to the “Home” screen of the PEM4
+ SPU3 system.
Figure 19
–
HOME screen twin screw vessel
Figure 20
–
HOME screen in case no T(T)-Sense
®
connected
The
Home screen
(Figure 19) is showing all important actual information regarding the Main Engine(s).
Fuel consumption, torque, shaft speed and shaft power will be monitored per propeller shaft line.
Propulsion system (if thrust measurement is available) and ship speed (if a speedlog or GPS unit is
connected). Fuel consumption can be monitored per engine depending on the number of flow meters
incorporated in the fuel system.
When no T(T)Sense
®
sensors are connected to the system, the actual fuel consumption is shown in the
Home screen
according Figure 20.
SOG
Speed Over Ground
knots
STW
Speed Through Water
knots
Torque
Torque per shaft line
kNm
RPM
Shaft speed
rpm
Power
Shaft power per shaft line
kW
Thrust (TT-sense
®
)
Propeller thrust per propeller
kN
Fuel
Fuel consumption per main propulsion engine
kg/h
Propeller (TT-sense
®
)
Propeller efficiency
kN/MW
Propulsive
Propulsive efficiency
kWh/NM
SFOC
Specific Fuel Oil Consumption of the main engine
g/kWh
Ship Efficiency
Fuel consumption of the main propulsion engine(s)
kg/NM
Twin screw propulsion
When the PEM4 + SPU3 system is monitoring a twin screw propulsion system the light grey bar in the
centre of the
Home screen
will show the “Total Propulsion Power” and “Total fuel consumption” by the
main engines.
Ship’s speed input
In case the speedlog signal or GPS-STW signal is connected to the PEM4 + SPU3 system, the
Home
screen
will show the ship’s speed through the water (STW).
Note: In case both signals are connected, speed log signal and GPS-STW signal, than the PEM4 + SPU3
system will use the GPS-STW signal to display and for calculations.
In case the GPS-SOG signal is connected to the PEM4 + SPU3 system, the
Home screen
will show the
ship’s speed over ground (SOG).
When both SOG and STW are used as input to the PEM4 + SPU3 system you will be able to detect that
the vessel is sailing against or with the current.
For example: When SOG is below STW the vessel is sailing against the current.
SI (Metric) or US units
As a standard the PEM4 + SPU3 system is using SI (Metric) units. If applicable the units at the PEM4
touch screen can be set to US standards.
Please contact VAF Instruments before delivery of the PEM4 + SPU3 system if you like to switch the
units from SI to US standard.