Chapter 1, Speed Transducer
ST40 Instruments Service Manual 83149-2 3-3
Speed
Transducer
Insert assembly installation
When reinstalling the insert assembly:
• Ensure that the ‘O’ rings have been inspected and if necessary, replaced and
lubricated
• Ensure that the key of the insert assembly locates with the keyway of the housing
assembly.
• Secure with cap nut (hand tighten).
ST40 Speed transducer connections
Cable core Instrument head circuit Description
colour diagram reference
Red 12V Approximately 11.2 V dc out
Green SPD With transducer attached, spinning paddlewheel
produces pulses approximately 11.2 V dc in amplitude
at 5.5 Hz/knot.
Screen 0V 0 V
White TEMP With transducer attached, voltage here is dependent
on temperature. Approximately 1.8 V at 0 degrees C.
Brown 0VANA 0 V
To Next Page
Loading...
