Deep SUNA Manual
For SUNA running firmware version 2.4 or later
5. Configuration Parameters in Context
Table 19: Data acquisition configuration parameters by operating mode.
Name
Acceptable Values
Explaining Subsection
Operation mode
Continuous, Fixedtime, Periodic,
Polled, APF
Operation control
Samples, Duration
Continuous mode,
Periodic mode
Fixed time duration 1–1000000
Continuous mode
Light samples
1–65535
Continuous mode
Dark samples
1–65535
Continuous mode
Light duration
1–65535
Continuous mode
Dark duration
1–65535
Continuous mode
Periodic interval
1m, 2m, 5m, 6m, 10m, 15m, 20m, 30m,
1h, 2h, 3h, 4h, 6h, 8h, 12h, 24h
Periodic mode
Periodic offset
0–86399
Periodic mode
Periodic samples
1–255
Periodic mode
Periodic duration
1–255
Periodic mode
Polled timeout
0–65535
Polled mode
APF timeout
1–100
APF mode
Skip Sleep at Start
On, Off
Polled mode,
APF mode
5.4 Data Processing Configuration
Data processing is independent of input/output and data acquisition configuration.
5.4.1 Basic Data Processing
Data processing normally uses the 217 to 240 nm interval of the measured spectrum.
The measured absorbance in that interval is decomposed into absorbances due to
individual absorbers, and the absorbance due to an absorber is converted to a
concentration value for that absorber.
The sensor can decompose the absorbance either solely into nitrate (freshwater use) or,
if calibrated for this, into nitrate, seawater, and seawater temperature effects
(oceanographic use). If a sensor has been calibrated for oceanographic use, but is to be
used in a freshwater environment where the salinity will be below 1 PSU, the user
should constrain data processing to use only nitrate decomposition by setting the
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