Self-Test Stage 3 - Raymarine ST40 Service Manual

Chapter 3, ST40 Bidata Instrument
ST40 Instruments Service Manual 83149-2
Press the and keys together momentarily, to proceed to self-test stage 3.

Self-test stage 3

Note: Known good Speed and Depth transducers must be connected, for this test,
with the Depth transducer placed in water. If this is not possible, an echo simulator
can be used in place of the Depth transducer.
When entering self test stage 3, the instrument beeps and the display shows TEST3,
for 1 second.
A transducer test then starts. At the Speed transducer, manually spin the paddle
wheel within 15 seconds of starting this test.
If the instrument detects valid temperature and speed pulses within 15 seconds of the
start of test stage 4 and if the Depth transducer interface is satisfactory, PASS is shown
on the display.
If the test fails, either a FAIL44 (speed circuit) or FAIL43 (depth circuit) is indicated.
Use the appropriate table in either Chapter 1, ST40 Speed Instrument or Chapter 2,
ST40 Depth Instrument, to isolate the cause.
Press the and keys together momentarily to exit self-test.
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