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Service Manual
Third edition, June 1997
pattern with a dynamometric wrench. Then check the
antenna feeder position once again. Readjust if neces-
sary. The gasket settles down, so tighten the nuts to the
torque shown above, again after two hours.
6. Install the Electronic Box.
Note: Before replacing the transmitter cover, make sure the interior
of transmitter housing is completely dry and clean. Encased water
or damp cause corrosion of the terminal block and wire leads caus-
ing contact fault. Wipe with a clean and dry cloth if necessary.
7 Temperature Sensors (Option)
The Pt 100 temperature sensors are optional equipment
installed separately in a sealed pipe submerged in the tank.
Up to three temperature sensors are used to measure the
cargo temperature.
The sensors are connected to a wire terminal inside the Tem-
perature Connection Box. From this wire terminal there is a
cable to the wire terminal in the transmitter housing.
If there is an ERROR-status on one or more temperature
sensors, these may need to be replaced.
Protective hose
(Option)
Wire
terminal
Pipe
stand
Thermowell for
temperature sensors
Figure 7-1. Temperature Connection Box.
7.1 Checking a Temperature Sensor
The Pt 100 temperature sensor has a near linear relation
between resistance and temperature. 0°C corresponds to 100
Ω and 100°C corresponds to 138,5 Ω. The relation between
the temperature and the resistance is shown in figure 7-3.