Sequoia LISST-200X, Руководство пользователя

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LISST-200X Operation Details 56 LISST-
200X User’s Manual
15.
Configuring the LISST-200X as a Sensor for a CTD
The LISST-200X can operate as an analog-output auxiliary sensor for a CTD. For this
purpose the LISST-
200X’s auxiliary six-pin connector must be in its “Dual Analog Output”
configuration. The two analog outputs represent the total volume concentration of particles,
and the Sauter mean diameter (SMD). These values are approximations for the
convenience of real-time display. For highest-quality data you will still need to offload and
process the detailed data from the LISST-200X after deployment.
The LISST-200X updates its analog outputs each time it collects a sample, at a maximum of
1 Hz.
STEP ACTION RESULT
1
•
Determine current configuration of Auxiliary connector: in
LISST-200X software, open the instrument status bar. Look
for the Endcap Configuration. If it is not in the Dual Analog
Output configuration, it must be changed; contact Sequoia
for assistance.
Auxiliary
Connector
configuration
determined
2
•
Make the appropriate connections between the 6-pin
auxiliary connector of the LISST-200X and your sensor. To
see the pin assignments, type the CONFIG command in the
LISST-200X terminal window (see LISST-200X Command
Details on page 61), or see Appendix E: Connectors.
Connected to
CTD
3
•
In LISST-200X software, set the sampling parameters as
follows (see
•
Configuring Data Collection on page 32):
o
Operating mode: Fixed sample rate
o
Sample to be average of 20 measurements
o
Sample interval: 1 second
o
Automatically start sampling program upon power up
Start condition: delay 0 minutes
o
Stop condition: memory full
200X will collect
data at 1 Hz
whenever the
CTD supplies
power to it