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Certain conditions may effect the results of your system. The EML may with
time, reduce in speed due to growth on the metal pins. This can be calibrated
away (should be cleaned regularly).
The DL1 system requires less maintanance.
The DL1 system, by default, measures the speed through the water from depth
0.25 m to 3 m. If the water is shallower than 3 m, an element of the bottom speed
may inuence the results. This may be improved by changing the settings to
position 1. The Doppler measurements in the DL1 will be affected by water
temperature. However, this is compensated internally. Both systems may suffer
from reduced performance in high seas or in water containing many bubbles.
The EML may see a slightly reduced speed in area of extreme fresh water
<5 ppt salinity.
If you suspect something may be wrong with your Speed Log, the system has
possibilities to perform self diagnostics. This is available in the diagnostics
menu. In addition, an up to date diagnostics guide can be downloaded from
the support pages of www.skipper.no. Also, a SKIPPER service software is
available for download providing diagnostic support.
SELF DIAGNOSTICS
The Compact speed log contains some diagnostic features to enable the user
to decide which part of the system is failing. The last 20 errors are stored in
the system and can be downloaded using the diagnostics port. If the error is
serious, the system will cause a general alarm (if activated), and restart itself.
Error numbers can be found in “Appendix 5” on page 58.
Test No. What it does What is wrong?
0 All LEDs dimming
SET = on/off
Check for LEDs not working. Check
normal screens for rows or LEDs
sticking.
1 Check internal memory. If fail, the system is not able to
communicate with the internal ash
memory.
2 Send out a command
to sensor and wait
for response or same
message back.
If fail, either the output or the input
to the sensor is not working or the
sensor is failing.
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