Manual revision 017
Section 3: Setting Up System
SBE 33
27
Changing Communication Settings between SBE 33 and Computer
The SBE 33 factory defaults (9600 PC baud, 4800 CTD baud, 8 data bits, no
parity) are compatible with our newer instruments (SBE 19
plus
, 19
plus
V2,
25
plus
, 49). If communication settings in Seaterm’s Configure menu do not
match the settings in the SBE 33, the display shows
garbage
characters when
you power up the SBE 33. This happens most often when using the SBE 33 for
the first time with an SBE 19 or 25, which require 7 data bits and even parity.
The procedure below applies to using an SBE 19 or 25 with an SBE 33 set at
factory defaults.
Once you change communication settings in the SBE 33, it
will retain the new settings, even if you remove power.
1.
In Seaterm’s Configure menu, select the
SBE 19plus
, regardless of which
CTD you are using. This allows you to establish communications using
the SBE 33 defaults, so that you can then change the communications
settings to match your CTD.
2.
In the Configuration Options dialog box, click on the COM Settings tab.
Set the baud rate to 9600, data bits to 8, and parity to none.
3.
In the Communications menu, select
Send 5 second break
.
4.
Wait at least 10 seconds. Turn power to the SBE 33 off and then on again.
The display in Seaterm should look like this:
SBE 33/36 Deck Unit V3.0 setup:
PC baud rate = 9600
CTD baud rate = 4800
8 data bits, no parity
NMEA baud rate = 4800
NMEA messages decoded = GGA, GLL, RMA, RMC, TRF, DBT, DPT
Surface PAR disabled
NMEA depth disabled
start mode = echo characters to and from the instrument
Press @ to change the 33/36 Deck Unit setup
5.
Type
@
to change the SBE 33 setup. Type
8
and press the Enter key to
change the communication settings in the SBE 33 to those required for
use with your CTD (SBE 19 or 25 – 7 data bits and even parity;
SBE 19
plus
, 19
plus
V2, 25
plus
, or 49 - 8 data bits and no parity; see CTD
configuration sheet for CTD baud rate). The display looks like this:
PC baud rate = X, new value =
(type desired value, press Enter)
CTD baud rate = X, new value =
(type desired value. press Enter)
parity = X, new value = even parity or no parity [e/n]
(type
e
or
n,
press Enter)
NMEA baud rate = X, new value =
(type desired value, press Enter)
Start mode = X, new value = echo or add Lat/Lon [e/a]
(type
e
or
a,
press Enter)
The display then shows your new selections. Type
@
to return to the
setup menu.
6.
In the Configure menu, select the actual CTD you are using (for
19
plus
V2 or 25
plus
, select SBE 19plus). On the COM Settings tab, select
settings to match the settings you input to the SBE 33 in Step 5. Click
OK
to save the settings and exit the dialog box.
7.
Turn power to the SBE 33 off and then on again. The display in Seaterm
should look like this if you set it up for an SBE 19 or 25:
SBE 33/36 Deck Unit V3.0 setup:
PC baud rate = 9600
CTD baud rate = 4800
7 data bits, even parity
NMEA baud rate = 4800
NMEA messages decoded = GGA, GLL, RMA, RMC, TRF, DBT, DPT
Surface PAR disabled
NMEA depth disabled
start mode = echo characters to and from the instrument
Press @ to change the 33/36 Deck Unit setup
8.
Continue testing, starting at Step 8 in
Setting Up and Testing System
above.
Note:
Send 5 second break
resets the
communication settings in the
SBE 33 to factory defaults:
PC baud rate 9600
CTD baud rate 4800
8 data bits, no parity
NMEA baud rate 4800
Notes:
CTD baud rate must be less
than or equal to PC baud rate.
NMEA baud rate is 4800 or
9600.
Parity selection also affects the
communication data bits:
even parity = 7 data bits,
no parity = 8 data bits.
If NMEA depth is enabled
(using a NMEA depth device as
well as a NMEA position
device) and/or Surface PAR is
enabled, the query for Start
Mode changes to include
NMEA Depth and/or PAR, as
applicable:
new value = echo or add
Lat/Lon/
Depth/PAR
