Manual revision 017
Section 7: Troubleshooting
SBE 33
42
Problem 3: Water Sampler or CTD Does Not Respond
Cause/Solution 1:
There may be no voltage on the sea cable. Turn off the SBE 33, remove the
power cable, and wait 1 minute. Connect a voltmeter (range set to at least
300 volts DC) to the back-panel
Sea Cable
connector. Turn on the SBE 33.
The voltmeter should read 250V.
If no sea cable voltage is observe
d, the sea cable supply is inoperative. Turn
off the SBE 33, remove the power cable, and wait 1 minute. Check the back-
panel
Sea Cable Fuse
. If this fuse is blown, the sea cable may have been
inadvertently shorted, or the Water Sampler or CTD may be malfunctioning.
Check the resistance across the sea cable and correct if shorted.
You can also perform a check with your water sampler and the supplied test
cable; try to fire the water sampler in this manner (bypassing the actual sea
cable). If the system works with the test cable, there could be problems with
the sea cable and/or termination.
Problem 4: Unsupported Modem Message (
FFFFFFFF Unsupported modem
message: XX XX XX
) from Water Sampler
Cause/Solution 1
:
There may be noise on the line, causing extra characters to be sent. Check the
sea cable for damage (see Problem 3 above). Also check the cable between the
water sampler and the CTD.
Cause/Solution 2
:
The baud rate and/or serial port for water sampler control may be incorrect.
Check the serial port setting in Seasave (Configure Inputs, Serial Ports
tab,
Water Sampling and 911 Pump Control Serial Port
); this should be
the port connected to the SBE 33
Carousel Data
connector.
Check the baud rate setting for CTD communication in Seasave
(Configure Inputs, Serial Ports tab,
CTD Serial Port
); in the SBE 33
(CTD baud rate). This must match the
CTD baud rate
set in the SBE 33
(which is also the baud rate used for communication between the CTD
and the Water Sampler) and the baud rate set in the CTD. For the most
efficient operation, keep this baud rate at 4800 if feasible for the CTD.
Cause/Solution 3:
The Carousel may be malfunctioning and sending bad messages.
WARNING!
Use extreme caution when making
these tests.