Salinity Probe Calibration

Salinity is a measurement of dissolved solids in liquid: these solids will conduct electricity to varying degrees. A special probe is used, with two electrical contacts in it, to determine the resistance to the flow of electricity in the liquid. The higher the resistance, the lower the PPM of dissolved solids.

In the MkII systems, the salinity probe is located in a port on the bottom of the pump module- manifold. This way we can look at the salinity level of the product water before deciding to either reject the water or accept it and divert it into the holding tank.

The salinity level in parts-per-million can be seen either through the salinity meter in the soft- ware, or on the display.

The next step is to decide what medium to use as calibration solution. If a hand-held salinity meter is available, you can simply take a reading of your product water while the unit is run- ning, then calibrate our MPC board to match that reading. As long as you trust the accuracy of your hand-held meter, this is all that is necessary.

The microprocessor calculates salinity from the signals sent back to it from the probe. The salinity circuit can be adjusted from the Spectra software by adjusting the “Salinity Calibra- tion” parameter, or from the display in the Salinity Cal window. Increase the calibration pa- rameter to increase the salinity reading.

Conductivity calibration solutions are available from Spectra Watermakers if another method of calibration is necessary. These solutions are pre-made potassium chloride solutions with known salinity levels. Calibration consists of inserting our probe into the solution and setting the calibration parameter to the required value.

To remove the salinity probe, unplug the telephone style cable from the probe. Use a wrench to unscrew the probe from the manifold. Re-connect the salinity probe cable, and you are ready to calibrate. Place the flat surface of the probe containing the two metal conductivity contacts into the calibration solution being careful not to get the cable or jacks wet. Upon re- installation, it is recommended to use Teflon tape on the salinity probe threads before re- installing to prevent leaks. We also recommend putting some silicone grease inside the jack, to prevent moisture from causing corrosion inside the jack.

38

Page 38
Image 38
Spectra Watermakers Newport 400 owner manual Salinity Probe Calibration

Newport 400 specifications

The Spectra Watermakers Newport 400 is a state-of-the-art desalination system designed for yachts and boats seeking reliable and efficient freshwater production. This innovative watermaker is known for its compact design, high performance, and user-friendly features. With the ability to produce up to 400 gallons of freshwater per day, the Newport 400 is ideal for extended cruising, offshore adventures, or as a backup water supply.

One of the standout features of the Newport 400 is its patented Spectra Reverse Osmosis technology. This advanced system harnesses the power of reverse osmosis to remove salt and impurities from seawater, ensuring the production of clean and safe drinking water. The Newport 400 operates with exceptional energy efficiency, requiring significantly less power compared to traditional watermakers. This is particularly beneficial for boats relying on limited energy sources like solar panels or generators.

The Newport 400 is engineered for ease of operation and maintenance with a user-friendly control panel. Operators can easily monitor key parameters such as water output, pressure, and system status. The intuitive interface makes it simple to adjust settings and troubleshoot potential issues. Additionally, the system is constructed from high-quality corrosion-resistant materials, ensuring durability and longevity in harsh marine environments.

An impressive characteristic of the Spectra Newport 400 is its ultra-quiet operation. This watermaker is designed to minimize noise, making it perfect for use in the close quarters of a yacht without disturbing the peace on board. The integration of advanced technologies further enhances its performance, including a sophisticated water pre-filtration system that reduces the risk of membrane fouling.

The Newport 400 is also designed with versatility in mind. It can be easily integrated into various onboard systems, allowing for simple installation and operation. Its compact size means it can fit into tight spaces on smaller vessels without sacrificing performance.

In summary, the Spectra Watermakers Newport 400 is a reliable, efficient, and quiet solution for generating freshwater in a marine environment. Its advanced reverse osmosis technology, ease of use, and robust construction make it an ideal choice for boaters seeking independence from shore-based water sources. Whether for leisurely cruising or serious ocean voyaging, the Newport 400 stands out as a top-tier watermaker for modern maritime adventures.