How does “ER-Contem” work? Each component of the “ER-Contem” takes different measurements, and these measurements are often processed through computer software to create specific parameters. The principle works of “ER-Contem” refers to pre-existing devices, it is Conductivity, Temperature and Depth (CTD). D (Depth): Despite having depth in the name, all CTDs actually measure pressure, which is not quite the same thing. Inductive cell in CTD as a salinity sensor. T(Temperature): Temperature is measured in ITS-90 degrees Celsius (°C). ITS-90 is an instrument calibration standard agreed to by a number of scientists in 1990. C (Conductivity): Finally, we get to Conductivity, the parameter you may be least familiar with. When a CTD device is lowered into the water to measure the salinity, temperature, depth of the ocean. When combined with temperature data, salinity measurements can be used to determine seawater density which is a primary driving force for major ocean currents. You may continuously access the data as long as the “ER-Contem” tool remains log on to the computer. So “ER-Contem” innovation will enable us to access flexibility data. Wireless devices can "listen" for data traffic on other frequencies on real time, and can rapidly switch from one frequency to another, such system is not available in CTD technology.
The process of creating “ER-Contem” tool had been carried out in IPB Campus, Dramaga, Bogor. The creating process included the construction of a series of electronic components, and programming. Some components used in this tool include Arduino Nano as a chip-shaped microcontroller, Raspberry Pi 2 as a processor, Electronic Conductivity Sensor for Arduino is a reader device for water salinity, Dallas DS18B20 Sensor for water temperature, RTC 3231, and Modem to send signals to the user.
The first trial and error test was carried out in the laboratory to determine the accuracy of the measurement equipment. Data from “ER-Contem” will be compared with standard salinity and temperature gauges. Calibration of tools in the laboratory was performed before “ER-Contem” field test, it will be implemented in Pelabuhan Ratu, Banten. The website pages are accessible when data has been uploaded.
In addition for research utilization, the creation of “ER-Contem” aimed to determine early warning system for natural disasters, marine phenomena, and as data support policy-related marine. In the future, the team expected that “ER-Contem” will be utilized as the tool to assist Indonesian marine researchers to get real-time data as well as contributing to the marine science of Indonesia. (Wied)
Source: Bogor Agricultural University | 6 July 2017