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Saved by uncleflo on January 6th, 2019.
This new standard defines three test charts. The new Imatest eSFR ISO module performs a highly automated analysis of the new low contrast (4:1) Edge SFR chart and is available in Imatest Master and Image Sensor 4.0. This chart does not work with the highly automated Imatest eSFR ISO module, described below. For highly automated measurements (including squares near the corners, color patches, and wedges) we recommend one of the Imatest eSFR ISO charts shown below. These charts are fully compliant with ISO 12233:2017. Supported by the Imatest Star Chart module. Optional automatic region detection is available when used with a star pattern that has registration marks on the sides of the image.
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Saved by uncleflo on January 4th, 2019.
Most enclosed boats will have some kind of water system on board, ranging from a single manual pump operated tap to a system featuring hot and cold water with mixer taps and showers. Marine plumbing can be a daunting subject but most pleasure craft designed for river use have surprisingly similar water systems and understanding the function of just a few key common components can really help to gain a good understanding of marine plumbing. Unlike domestic plumbing where water pressure is generally created by gravity, boats require an electric pump to generate water pressure as tanks are often level with or below the outlets they serve. The pump is therefore the heart of the system and works by cycling on and off to maintain the desired pressure and a good flow when you open a tap. Most pumps are switched on and off automatically via a pressure switch inside the pump, though some smaller pumps rely on micro switches within the taps themselves. Pumps do differ in the pressure they provide (usually in PSI) and the flow rate (usually in GPM or LPM). The size of your boat, the number of outlets the pump will serve and the complexity of the water system will dictate which pump you will need.
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