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Chapter: 2. Operation
back light settings, etc. These parameters are kept in the Compact Flash (CF) memory card, and are
automatically restored on power up. If the user parameters have never been set, default values are used.
There are 2 ways to reset the parameters to default values:
“Master Reset” will reset all parameters to default
“Reset Factory” will reset all parameters except I/O and calibration settings. .
Diagnostic functions
Built in test (BIT)
Built in test (BIT) is a function that runs a series of tests to try to nd known errors within the system.
There are 3 built in test in the DL850.
“Screen status” “Link to transceiver” Automatic test of communication Display-Transceiver.
“Screen status”, “System” Test of signal from sensor to Display.
“Screen diagnostics” The diagnostics ON will test the internal noise in the sensor and signal strength of
the water track signals from all 3 channels.
The BIT is developed to help discover and diagnose a possible problem.It is a tool to diagnose but may
not give an accurate fault description in all situations. It will not nd all problems, but if it recognises
a problem, it will give the result in the frame marked ‘ Possible reasons’. More information about the
tests is available on the manufacturers web pages.
Digitizing Scope
The Diagnostics screen has a “DIGITAZING” function allowing the user to look at the individual
returned waveforms on each of the sensors transducers, both in the water track ping and bottom track
ping. This allows the user to diagnose faults on the individual beams.
“Screen diagnostics”, “Details ON” then choose channel and WT/BT to show.
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