18
7.
OPERATING PRINCIPLES
7.1 GENERAL
A zero setting procedure is always necessary in order to obtain a correct measurement and reading of
the T-Sense
®
Torque sensor or TT-Sense
®
Thrust & Torque sensor.
For more detailed information see section 6.4 of TIB-661 T-Sense
®
or TIB-664 TT-Sense
®
.
The PEM4 + SPU3 system is an integrated solution for monitoring engine power, fuel consumption and
a wide selection of additional data and indicators. The PEM4 + SPU3 system will display the engine load
diagram and the actual load of the main engine. The menu structure of the PEM4 + SPU3 system is self-
explaining and the system is easy to operate.
A number of conditional messages will inform you about error/fault conditions if applicable.
Setups determining functionality are subdivided in two levels and access is only possible via a right-of-
access code. All setups and computations are stored in a battery backup RAM. The PEM4 + SPU3
system is self-checking as for correct functioning of its memories, program run and existence of supply
voltage.
7.2 DISPLAYED PARAMETER AND ENGINEERING UNITS
The following parameters are available
Unit
•
Shaft torque
kNm
•
Shaft speed
rpm
•
Shaft power
kW
•
Shaft thrust
kN
•
Total energy
kWh, MWh, GWh
•
Total mass
kg
•
Time-base
hours, minutes, seconds
•
Shaft generator power (to calculate total power)
kW or MW
•
Fuel oil flowmeters, max. 12x
(
*
)
l/min
•
K-factors flowmeters
pulses/litre
•
Fuel temperature sensors, max. 12x
(
*
)
°C
•
GPS NMEA Ship
’s SOG
knots
•
GPS NMEA Ship
’s STW
knots
•
Speed log (input)
pulses/NM
•
Fuel oil consumption
kg/h, ltr/h or kg/NM, ltr/NM
•
Specific gravity
kg/l
•
Thermal expansion
%/°C
•
Ref. Temperature
°C
•
Caloric value
MJ/kg
•
Specific Fuel Oil Consumption (SFOC)
g/kWh
•
Propeller thrust
kN
•
Thrust power quotient
kN/MW
(
*
)
for a maximum of 8 engines/consumers