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Office: 715.228.7604
Fax: 715.228-3418

364 Industrial Drive
PO Box 48
Coloma, WI 54930

Natural Water Cleaners

4/27/2012

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Today I'm thinking about mussels and natural water treatment.  Mussels are like nature's water treatment operators - they clean water in streams and rivers.  According to Monte McGregor, a malacologist interviewed in the video below, mussels act just like "a million tiny little pumps constantly removing the material from the water column and depositing it on the bottom."  From this article: 

"Mussels are reliable indicators of water quality, since they’re particularly sensitive to aquatic changes. Mussels are filter feeders that help keep the water  clean for all who depend on it, and their disappearance often signals that other aquatic  plants and animals  are at risk as well.


"Think of it this way: mussels are the mighty Mr. Cleans of the waterways. They try to keep the house tidy. But the increased intensity and the toxicity of the filth has been making them sick; and there’s not a lot of replacement labor. If they’re not around, the cleaning isn’t going to get done – and just like at home, the cleaning sure ain’t gonna do itself. Let’s hope it’s not too late to offer the sick some decent healthcare.

"Fortunately, the important role mussels play is no secret and many are working on their behalf.  For example, the National Park Service has stepped up to help recovery, and since 2000, the Tennessee Aquarium Research Institute has propagated more than a hundred thousand native freshwater mussels, providing for their release into the Conasauga River basin at the Institute’s hatchery."

Check out the video below.  While saving endangered species might not be at the top of everyone's priority list, I bet clean water is near the top of a lot of people's.  Efforts to repopulate mussels directly affect our water supply, which not only affects our drinking water but recreational uses of the water - like bass fishing (5:30 in the video).  Wonder whether we know anyone who would care about that?
It's interesting to keep in mind that while we can do a lot to clean water, we have natural partners that have been cleaning water for long before we got here.  By protecting them, we make our jobs easier and our water cleaner.
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MPE Pump Monitor Relay

4/13/2012

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I can't believe I haven't blogged about MP Electronics's latest new product - the Pump Monitor Relay.  This relay is a nifty component that monitors the critical operations of your submersible pump, and provides alarms when something isn't right.  The relay monitors both over temperature and seal leakage. 

How's it work?  For the Motor Over Temperature Alarm, the Pump Monitor Relay applies a low voltage DC signal to the Motor Thermal Sensor to check its status. If the Pump Monitor Relay detects that the Motor Thermal Sensor contacts are closed (normal condition), the Overtemp indicator remains off, and the Overtemp Relay is energized, closing the contacts between terminals 2 and 11.
When the Motor Thermal Sensor contacts open (Over Temperature condition), the Overtemp Indicator is turned on and the Overtemp Alarm Relay is de-energized, opening the contacts between terminals 2 and 11, and closing the contacts between terminals 2 and 1.

When the Over Temperature condition has cleared, the Pump Monitor Relay will reset based upon the position of Alarm Reset Mode Select Switch (Auto or Manual). When in the Auto position, the Overtemp Alarm resets automatically. When the switch is in the Manual position, the Overtemp Reset Push-button must be pushed for approximately 1.5 seconds to clear the alarm.

For the Seal Leakage Alarm, the Pump Monitor Relay detects moisture inside a pump motor by using a low voltage AC signal to measure the resistance across Leakage Probes #1 and #2, or between the Leakage Probe(s) and the grounded motor housing. A Seal Leakage condition is considered present when the amount of moisture in the motor causes the resistance between terminals 6 and 5 to drop below the setting of the potentiometer. When this occurs, the Pump Monitor Relay turns on the Leakage Indicator and energizes the Leakage Alarm Relay, closing the contacts between terminals 9 and 10.

The alarm trip point may be set by the following procedure: Isolate the Leakage Probe from terminal 6. Connect a resistor with the desired trip value across terminals 5 and 6. Slowly adjust the potentiometer to the point where the alarm turns on. Remove the resistor and reconnect the Leakage Probe(s) to terminal 6.

Check out the short clip below to watch to MP Electronic's President John Evans showcasing the Pump Monitor Relay device.  We're looking forward to using this component in projects going forward.  It's got all the hallmark benefits of MPE - versatile, user friendly, simple to use, logical, and American-made.

For more information, you can get the specification sheets from the MPE website or give us a call.  I've also created a new page called Pump Monitor Relay on our website under our MPE Products header that you can access for reference at any time going forward.  
Source: MPE Website
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Office: 715.228.7604
Fax: 715.228-3418

364 Industrial Drive, PO Box 48
Coloma, WI 54930

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