VAF instruments 667 - 7. OPERATING PRINCIPLES; 7.1 GENERAL; 7.2 DISPLAYED PARAMETER AND ENGINEERING UNITS

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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