Furuno Doppler Speedlog DS-50 Installation Manual page 35

5. Insulation of cables for transducer
When installing of the Transducer Unit DS-330 (option), check insulation as shown in the
procedure below.
Insulation check
1. Remove all cores and shields of the transducer from the terminal board. All wires of the
transducer are open.
2. Set the multimeter to the maximum resistance range and measure the resistance
between each transducer line (TD1, TD2, TD3) and individual or common shield.
Cable of
transducer
Measurement places
- polarity lead
Red wire of black
sheath
Red wire of black
sheath
Red wire of red
sheath
Red wire of red
sheath
Red wire of green
sheath
Red wire of green
sheath
Note) If rating is not met at a location, suspect faulty insulation. Replace a new one.
TD Black
Red
Black
TD Red
Red
Black
TD Green
Red
Black
Temperature Sensor 1 Yellow, White
Temperature Sensor
- polarity lead
Shield in black sheath
Common shield
Shield in red sheath
Common shield
Shield in green sheath
Common shield
Multimeter
Blue, Grey
Resistance value for insulation
Digital multimeter: More than 10M .
Analog multimeter: Needle does not swing.
5.2 Cable Fabrication
28