What is compound loop control?

The FX-8500-C compound loop controller consists of a microprocessor based controller and an analog summator circuit board. This board accepts two 4-20mA signal inputs from a residual analyzer and flow meter, and combines them into a single output to control a pump or valve.

What is compound loop?

You can combine repetitive and conditional loops to create a compound loop. The following loop is set to repeat 10 times while the quantity is less than 50, at which point it stops.

What is the combination of chloramine?

Chlorine molecules can combine with ammonia and nitrogen in the water to form chloramines, sometimes also called Combined Chlorine. By combining with ammonia and nitrogen, a chloramine loses most of its sanitizing power. Chloramines are 60 to 80 times less effective than an uncombined free chlorine molecule.

What are the compounds that contribute to chlorine demand?

Chlorine demand can be defined as the inability to maintain a chlorine residual in a pool or spa. An almost infinite number of substances can contribute to demand; these include bacteria, algae, ammonia, urine, sweat, health and beauty products, bather waste and animal waste.

How do you prevent chloramines?

1. Encourage healthy swimming to prevent chloramines from forming by stopping pee, poop, urine, dirt, and sweat from entering the water in the first place.
2. Ensure that airflow in the swimming area is set up to minimize the buildup of chloramines in the air.

What is the best practice to prevent algae growth?

Use an algaecide and other appropriate products regularly.

• Make sure your circulation system is running properly.
• Always keep sanitizer within the desired range.
• Shock the pool weekly.
• Develop and maintain a scheduled brushing routine.
• Find the right brush for your pool.
• Use a vacuum to remove dirt and debris.

Is chlorine in high demand?

Chlorine demand is caused by various contaminants entering the pool that increase oxidation levels or tie up free available chlorine. Symptoms can include slimy or slick pool walls and cloudy water, although water can be clear and still have a high chlorine demand.

What is Chloramine T used for?

As a disinfectant, it is used to disinfect surfaces and instruments. Chloramine-T has a low degree of cytotoxicity and has been used in direct contact with tissues. As such, it is used in the treatment of burns, in whirlpools for the treatment of wounds, and as an oral mouthwash.

Why is concurrent addition used in chloramination control?

Concurrent addition allows a very short direct contact time for free chlorine and water before reacting with ammonia. This method optimizes use of free chlorine as a primary disinfectant while reducing the formation of THM in the water. 2.

What happens when you switch from chlorine to chloramine?

Water system pipes develop a layer of biofilm (slime) that makes killing germs more difficult. Water providers may temporarily switch from chloramine to chlorine disinfection to help remove this slime layer. Is chlorine treatment new?

Which is the best control strategy for chloramination?

The ideal control strategy for chloramination is one that can perform an actual direct measurement of free ammonia, monochloramine and total chlorine. ChemScan Process Analyzers can detect free ammonia at concentrations as low as 0.02 mg/l as N.

When to use mono chloramine in chemscan?

ChemScan uses an idiometric method to detect total chlorine. When chlorine and ammonia are within normal operating ratios of between 3 to 1 and 5 to 1, all of the chlorine should be combined in the form of mono-chloramine.