Menu & Submenu Structure; Calculations - idronaut Ocean Seven 304Plus Operator's Manual

SECTION ONE – SYSTEM DESCRIPTION
1.10.10. Menu & submenu structure
Memory Management
1 – Memory status
2 – Show stored data
3 – Delete cast
4 - Initialize

1.11. CALCULATIONS

The fundamental properties of seawater, like: Salinity, Sound Speed, Water Density, Oxygen ppm
and pressure to depth conversion are obtained using the algorithms described in the UNESCO
technical papers in marine science no. 44 "Algorithms for computation of fundamental properties of
sea water". The freshwater properties like: TDS (Total Dissolved Solids), Fresh Water Conductivity
corrected at 20°C and 25°C are automatically calculated.
1.11.2. Conductivity compensated at 20°C
As reported in the Ambühl formula, the conductivity is compensated with the following calculation:
Where:
cond = conductivity sensor output a =
temp = temperature sensor output b =
IDRONAUT – Brugherio (MB)
Main Menu
1 - Acquisition
2 - Memory
management
3 - Calibration
4 - Service
5 - Change operating
mode
1 – Setup
2 – RTC
3 – Raw Counts
4 - Raw mV
5 - Rights
6 - Firmware
7 - Diagnostic
1 - GPL
2 - FRAM
3 - EERPROM
4 - SCARD
5 - ADC-12bit
6 - Term
7 - Timing
8 - Battery
K = a - b x temp + c x temp
cond 20 o C = cond x K
1.721183
0.05413696
OCEAN SEVEN 304Plus CTD
Service
Diagnostics
2
- d x temp
c = 0.0011484224
d = 0.00001226563
Data Acquisition
1 – Real time
2 – Pressure
3 – Timed
4 – Continuous
5 – Conditioned
6 – Burst
3
12-2015
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