Archive for September, 2010
Hach – Understanding alarm events
Responding to an Event …What do I do when I am notified of an alarm? The ultimate goal is to reduce damage to infrastructure and populations. By having access to real-time data this goal of a fast and accurate response is much more likely.
The purpose of drinking water event detection systems that rely upon multi-parameter monitoring is to trigger an alarm if water quality deviations on the sensors become excessive. In some cases these software programs are capable of analyzing these deviations to see if they match an agent fingerprint from a library. It is important to understand that these sorts of systems are only capable of a presumptive classification. Any match is only indicating that the water quality sensors readings have changed in the same manner that they would be expected to if the agent in question were indeed present. In other words the presence of the agent is being inferred from the changes in sensor readings. The actual agent may or may not be present. Occasionally more than one agent may be indicated. This is simply a signal to investigate further and can act as a guideline to that investigation. If the system were indicating cyanide might be present, it would not be wise to start an investigation on the presence of heavy metals as a first step. There is a lot of valuable information that can be gleaned from paying attention to the duration and the shape of alarm signals. Spikes or alarms of a few minutes duration are of less concern because they affect only a small quantity of water. See Figure.1. A change that is continuous and persistent is of more concern due to the large volume of water affected. See Figure. 2.
An actual agent will usually present a characteristic rise time and a plateau of stabilization. Then a drop off will occur when the contaminated water has moved past the sensors. It is possible that this kind of pattern will produce classification of different agents on the signal rise, plateau, and fall. This is caused by differences in sensor response times. Classifications on the rise and fall are not as reliable as those from the plateau of the response. This should be taken into account during the interpretation of the alarm. Click here for continued discussion on the topic. |
American children are not drinking enough water because it doesn’t taste good
I was reviewing my Yahoo news today and came across this little gem. I agree with the research data, and it corroborates much of what I and other industry experts believe; people don’t drink enough water!
What the article doesn’t really address is WHY our children aren’t drinking the amount of water that they should. In my opinion, children don’t drink enough water because their tap water is simply unpalatable. Unpalatable tap water is one of the most frequently cited reasons for people purchasing bottled water. Bottled water is now generally unfashionable, so people are being encouraged to drink their own tap water. Unfortunately most tap water in the United States contains chlorine tastes and odors as well as the tastes and odors transferred into municipal water from bacteria and other organisma (living and dead) that are frequently found in a city supply.
Chlorine is critical to maintaining a good municipal water supply,since it is highly effective in killing many (not all) bacteria and can oxidize many organic compounds to make it safe.
Regardless of how SAFE your tap water is, people won’t drink it if it tastes bad. Many homeowners resort to expensive filter pitchers, or refrigerator filters, but the smart money is on using point of use (POU) or point of entry (POE) water filtration and, purification systems.
By installing a home filtration system, you are not only in control of how safe your water is, but also of how good it tastes.
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U.S. Kids Drink Too Little Water: Study
HealthDay Reporter by Steven Reinberg
healthday Reporter – Sat Sep 25, 7:08 pm ET
SATURDAY, Sept. 25 (HealthDay News) — Children in the United States are not drinking as much water as they should, and the deficiency can have far-reaching implications, a new study suggests.
“Even mild dehydration can affect physiological function, and cause fatigue, muscle weakness, headaches and dry mouth,” said Samantha Heller, clinical nutrition coordinator at the Center for Cancer Care at Griffin Hospital in Derby, Conn., who was not involved in the study.
Impaired cognitive and mental performance are also linked to inadequate hydration, said Heller.
According to the study, published in the October issue of the American Journal of Clinical Nutrition, only 15 to 60 percent of boys and 10 to 54 percent of girls, depending on age, drink the minimum amount of water recommended by the U.S. Institute of Medicine.
Children obtain much of their water from sweetened beverages rather than plain old H2O, the researchers found. And those who drink the most plain water consume fewer sweetened beverages and eat fewer high-calorie foods.
For the study, Ashima K. Kant from Queens College of the City University of New York and Barry I. Graubard of the U.S. National Cancer Institute looked at the water intake of 3,978 boys and girls, aged 2 to 19 years, who had been included in a national nutrition study from 2005 to 2006.
Included in their analysis was water itself, water in moist foods, and moisture in all beverages and nutritious drinks such as milk and juice.
The investigators found that water intake from all sources varied by age: 2- to 5-year-olds drank 5.9 cups a day; 6- to 11-year-olds got 6.8 cups, and 12- to 19-year-olds consumed 10.1 cups daily. Girls generally drank less than boys, Kant and Graubard noted.
Kids of all ages are more likely to drink beverages than water at mealtime, the findings suggest. More than two-thirds of water consumption was derived from beverages with main meals, while only one-third of the plain water was consumed with meals, the researchers found.
“Our results suggest age differences in the extent of water contributed by different sources to the diets of American children,” the study authors wrote. “The quality of food selections reported in association with plain water intake was better than that reported with increasing beverage moisture, and the strength of these associations varied with age,” they added.
“Efforts to moderate the consumption of sweetened beverages and promote plain water intake should not only continue to promote plain water for snacks but also should recognize the importance of replacing nonnutritive beverages at meal time with plain water,” Kant and Graubard concluded.
As the children got older, consumption of plain water increased while intake of nutritive beverages, such as milk, decreased, the researchers found.
Water makes up 55 to 75 percent of total body weight, said Heller. “We cannot live without water for more than a few days because our bodies cannot store water. Thus, it is essential we replace the water our bodies lose every day.”
Heller, a nutritionist and dietitian, advises starting children on water early.
“Give them water instead of sweetened beverages during the day and between meals,” she said. To make it more appealing, put sliced cucumbers, oranges, lemons or strawberries in ice water, she suggested.
And if your child is hooked on sodas, she advised transitioning to seltzer or flavored seltzers instead.
More information
For more information on healthful diet, visit the U.S. Department of Agriculture.
Older Erie 541 water softener circuit boards and programming guide
As many of you know, the Erie 541 series water softener control base platform is one of the oldest and most reliable designs in the marketplace. There are a large number of installed mechanical and electronic versions of this controller in Utah, the intermountain west,across the USA and in Europe.
The most common legacy version of this control is the 5-button 541 metered digital controller. The 5-button controller was first fielded in 1983 and went through three generational changes until it was discontinued in 1998.
The 1st and 2nd generation controllers have a red display (v1 had 6 buttons instead of 5), while the 3rd generation controller has a gray non-backlit display. Replacement circuit boards are no longer available, but they can be upgraded to the latest evertech controller using an upgrade kit that works with 3-cycle, 5-cycle, and 7-cycle versions of this water softener control.
While the 110VAC digital metered control is extremely reliable, there are times when a circuit board needs to be replaced or removed and I am frequently asked how to wire the boards.
For your convenience, here is the standard wiring chart for 110/120VAC Erie control boards for the 541-170/542-172 series diaphragm soft water controls. The 3-cycle version omits the backwash solenoid, but wires identically on the other components.

Programming guide
1. Find the serial number on the back of the control.
2. Follow the steps to program the system.
3 cycle – Serial #: 541-190xx (No Solenoids on the back of system)
- Press button 2 and set Time of Day using button 3 (hours) and button 4 (minutes).
- Press button 2 and set Cleaning Time using button 3 (hours) and button 4 (minutes) (default is 2:00am).
- Press button 2 and set Capacity using button 3 (up) and button 4 (down) – 1200 gallons.
- Press button 2 and set Reserve using button 3 (up) and button 4 (down) – 350 gallons.
- Press button 2 and set Cycle 1 using button 3 (up) and button 4 (down) – 90 minutes.
- Press button 5 to confirm settings.
5 cycle – Serial #: 541-172xx (One Solenoid on the back of system)
- Press button 2 and set Time of Day using button 3 (hours) and button 4 (minutes).
- Press button 2 and set Cleaning Time using button 3 (hours) and button 4 (minutes) (default is 2:00am).
- Press button 2 and set Capacity using button 3 (up) and button 4 (down) – 1200 gallons.
- Press button 2 and set Reserve using button 3 (up) and button 4 (down) – 350 gallons.
- Press button 2 and set Cycle 1 using button 3 (up) and button 4 (down) – 5 minutes.
- Press button 2 and set Cycle 2 using button 3 (up) and button 4 (down) – 65 minutes.
- Press button 2 and set Cycle 3 using button 3 (up) and button 4 (down) – 5 minutes.
- Press button 5 to confirm settings.
7 cycle – Serial #: 541-170xx (Two Solenoids on the back of system)
- Press button 2 and set Time of Day using button 3 (hours) and button 4 (minutes).
- Press button 2 and set Cleaning Time using button 3 (hours) and button 4 (minutes) (default is 2:00am).
- Press button 2 and set Capacity using button 3 (up) and button 4 (down) – 1200 gallons.
- Press button 2 and set Reserve using button 3 (up) and button 4 (down) – 350 gallons.
- Press button 2 and set Cycle 1 using button 3 (up) and button 4 (down) – 5 minutes.
- Press button 2 and set Cycle 2 using button 3 (up) and button 4 (down) – 65 minutes.
- Press button 2 and set Cycle 3 using button 3 (up) and button 4 (down) – 5 minutes.
- Press button 2 and set Cycle 4 using button 3 (up) and button 4 (down) – 10 minutes.
- Press button 5 to confirm settings.
*T o manually cycle system, press button 1 (an arrow in the lower left corner will display. After 60 seconds the system will start the cleaning process)
**To change display options, press button 5 to switch between ‘time of day’, ‘capacity remaining’, and the flow meter.


