2
Setting Up/Using the CTD in Moored Mode
General
Delay before sampling sets the amount of time to wait after switching on external voltages before sampling. The
ECO-FL requires approximately 3.5 seconds to sample, if set up to take a single measurement for each sample (longer
time required for multiple measurements per sample). Therefore, set:
• DelayBeforeSampling= (16plus and 16plus V2 RS-232 version, and 19plus and 19plus V2 in moored mode), or
• #iiDelayBeforeSampling= (16plus and 16plus V2 RS-485 version, and 16plus-IM and 16plus-IM V2)
to greater than the expected time required for the ECO-FL to sample.
Newer CTD firmware
• SBE 16plus (RS-232) firmware version >
1.6d (October 2004 and later) and all 16plus V2 (RS-232)
• SBE 16plus (RS-485) Digital firmware version >
1.0c (May 2005 and later) and all 16plus V2 (RS-485)
• SBE 16plus-IM Digital firmware version >
1.1b (May 2005 and later) and all 16plus-IM V2
• SBE 19plus firmware version >
1.4f (May 2005 and later) and all 19plus V2
Sea-Bird added a Bio-Wiper command to the command set, to ensure that the Bio-Wiper automatically closes after
sending the status command:
Command Description
BioWiper=x
(16plus and 16plus V2 RS-232 version,
and 19plus and 19plus V2)
or
#iiBioWiper=x
(16plus and 16plus V2 RS-485 version,
and 16plus-IM and 16plus-IM V2)
x=Y: Configuration includes WET Labs ECO-FL fluorometer with
Bio-Wiper. CTD is powered longer (total of 8 seconds) for status
command, providing 4 seconds for Bio-Wiper to open and then shut
again if in Moored mode.
Note: 4 seconds for the Bio-Wiper to open and shut is sufficient for the
typical application, with the ECO-FL set up to take a single measurement
for each sample. However, the ECO-FL can be user-programmed to take
and average a number of measurements for each sample; if averaging
multiple measurements, 4 seconds may not provide sufficient time for
the Bio-Wiper to close. Use the TV, TVR, or TS command (#iiTV,
#iiTVR, or #iiTS for RS-485 or IM versions) after the status command, as
described below for older CTD firmware, to ensure the Bio-Wiper closes
for these applications.
x=N (default): Configuration does not include ECO-FL with Bio-Wiper.
Older CTD firmware (not applicable to any of the V2 SEACATs)
• SBE 16plus (RS-232) firmware version <
1.6c
• SBE 16plus (RS-485) Digital firmware version <
1.0a
• SBE 16plus-IM Digital firmware version <
1.1
• SBE 19plus firmware version <
1.4d
In older CTD firmware, power was not provided for enough time for the Bio-Wiper to close after the status command
(DS for 16plus RS-232 version and 19plus; #iiDS for 16plus RS-485 version and 16plus-IM) was sent if the Bio-Wiper
was in Moored mode. If the user did not notice that the Bio-Wiper was still open, and then deployed the CTD on a
mooring with a delayed start time, the ECO-FL could become fouled, because the Bio-Wiper would not close until after
the first sample was taken.
For these older firmware versions, after sending the status command:
Send the TV, TVR, or TS command (#iiTV, #iiTVR, or #iiTS for RS-485 version or IM versions) and then wait at
least 10 seconds to cycle the Bio-Wiper open/closed. Verify that the Bio-Wiper has closed before deploying.
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