| Price : $219.99
Superior flexibility, ease of use and outstanding water management. All together in one commercial controller.
| Price : Valve boxes house the control points in all utility systems like water, gas, electricity, cable TV and telephone. These control points, or valves in the case of water and gas, are used to turn off the supply in case of emergencies, or simply for inspection and meter readings.
The average homeowner will probably be most familiar with the boxes used in sprinkler systems for residential landscaping purposes. When leaks spring up in your household plumbing you may usually have to find the valve box fast to turn off the water supply. But besides their use in homes these units are used in municipal parks, industrial business parks, greenbelts, schools, golf courses, and so on.
Valve boxes were traditionally made out of steel or pre-cast concrete, but the trend these days has been to make them out of environmentally friendly plastics like polyolefin that is stabilized to withstand wear and tear and is resistant to Ultraviolet degradation. These materials are cheaper than steel or concrete and they are formulated such that they do not leak dangerous chemicals into the soil.
Because valve boxes are used to house safety valves and switches that are used in emergency management many manufacturers these days are building "homing" devices in them that make it easy to locate them in overgrown or disused areas. The devices may be no more than a magnet or metal insert that makes the unit easy to find with a simple metal detector, but when you need to find the box in a hurry this may come in handy.
But things are changing and finding your valve box these days may be as simple as looking out your living room window. For the trendy, fashionable homeowner some of these units are now designed to look like rocky outcrops in your lawn, giving it an attractive, "pristine" appearance that adds beauty and definition to any landscape. These imitation rocks come with names like Granite Rock, Fake River Rock, Boulder Rock, Landscape Rock and Sandstone Rock. And do they stand out! You have a choice of colors from granite to sandstone to pebble beach.
With these realistic looking imitations you can give your lawn or garden a unique touch. As has been said by some, under the right circumstances fake beats real every time. That may be overstating it, but these "rocky-looking" imitations can come in handy when you want to add the aesthetic effect to what would otherwise be an eyesore.
You can use them to cover such things as water valves, sprinkler heads, electricity control boxes, and water mains covers. Or perhaps it is that glaring exposed piping that you can't hide or move to some other secluded area of the lawn or garden.
The trend in landscaping design these days is to maximize the thematic beauty of the landscape. This leaves no room sometimes for any exposed objects that could subtract from the aesthetic effect. For this reason even the traditional valve boxes come in colors that blend in perfectly with the rest of the greenery, or the sandy patches and pebble spaces. With the imitation rock valve boxes the thematic effect can be taken to a new level.
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The Weathermatic Smartline SL1600 Controller is an irrigation product that can analyze data from plants, ground and weather and determine exactly how much water is required from the sprinkler system. The accuracy of the Weathermatic Smartline SL1600 Controller is 5% accuracy of the most expensive of commercial machines that perform the same operation.
The Smartline creators have enthusiastically stated that the artificially smart system is the equivalent of having a scientist living in your garage. (And a scientist that doesn't demand food, water or constant sugar snacks) Analyzing just how much water you need is not only efficient but will help you to save on water usage, which will in turn lower your water bill.
The Weathermatic Smartline SL1600 Controller is a four-zone base model but can expand to sixteen zones using the SLM4 four-zone module. It is rated for indoor or outdoor use. Some frequently asked questions about the Weathermatic Smartline SL1600 follow:
Q: Do I have to change my sprinkler system to install the product?
A: The Weathermatic 1600 Controller was designed to be easy to install and ideally takes place in about an hour and a half. All you have to do is switch out the old controller and then install the weather station. You will be connecting the station to the valves. Nothing has to be done to the programming, because its preset functions take care of everything.
Q: Is the Weathermatic Smartline SL1600 Controller expensive?
A: The SL1600 series usually sells at less than 0. While this is a moderate price to pay initially, most customers find that the money they save using the product makes up the loss over a few months. Customers literally save 20-50% of money spent on paying high water bills that result from water excess. In actuality, SmartLine products like the SL 1600 are actually more affordable than the alternative. Smart Irrigation also saves time and labor as well as money, when it comes time for professional contracting.
Q: Why is the SL1600 Controller Healthier to the Soil?
A: Soil, like any growing life form, needs consistent nourishment. Turf and landscaped areas need a precise amount of water. When the exact amount is used, it saves residents money, not to mention the city water department. On the contrary overwatering plants, lawns or gardens causes unhealthy plants that are more susceptible to disease and pest damage. Products like the Weathermatic SL1600 Controller also prevent against run off, a problem that can compromise the purity of water as it goes back to the city water supply.
Q: What are some of the nicest features of the Smartline SL1600 Controller?
A: The Weathermatic Smartline SL1600 Controller offers many high-tech features that can customize your watering schedule. You have the ability to program watering by time and date, by zone run time, by day, by seasonal percentage or even by "auto adjust", which adjusts the watering according to site conditions.
This is a product that will do much more good than harm, financially and to the environment.
With the development of technology, man has learnt to use very reliable and accurate systems that require least manpower. Automatic control systems are one such development. Control is defined as the science of regulation of a parameter by comparing it with a standard value. This is the aim of an automatic control system. They constantly monitor the output of system and if this output is found to deviate from the desired value, it produces a control signal that server to bring down the change by providing a driving energy to the component that is responsible for the deviation.
A system is said to be made of a number of components such that the behavior of the overall combination can be predicted if
1. The behavior of the each component can be predicted, and
2. The interaction between each component is known.
Hence, a system is obtained when a number of components are connected in a sequence to perform a specific function. Suppose in a system, the output quantity is controlled by altering the input quantity, and then such a system is called control system.
The output quantity is called the controlled variable and the input quantity is called the input signal. Automatic control systems have become an integral part of modern manufacturing and industrial processes.
Examples:
-Manufacturing industry: numerical control of machine tool.
-Industrial process: control of pressure, temperature and flow.
Basic control system definitions
Controlled variable:
The quality or condition characterizing a process whose value is held constant by a controller or is changed according to a certain algorithm designed with the interests of the nature of the function the system is performing.
Controlled medium:
The process material in the control system in which the variable to be controlled exists.
Command
An input that is established or varied by some means external to and independent of the feedback system.
Set point or Reference input:
A signal established as a standard of comparison for a feedback control system by virtue of it's relation to command. The set point either remains the same or is varied with respect to time depending on a preset algorithm.
Actuating signal:
An algebraic sum of reference input and primary feedback. It is also called error or control signal.
Manipulated variable:
The quality or condition that is varied as a function of the actuating signal so as to change the value of the controlled variable.
Primary feedback signal:
The function of the controlled output which is compared to reference input to obtain the actuating signal.
Error detector:
An element that detects feedback; essentially a summing point which gives the algebraic sum of its inputs.
Disturbance:
An unwanted variable in the system which tends to affect the system adversely by changing the controlled variable. Disturbance may due to change in set point, supply, demand, environment and the other associated variables.
Feedback element:
An element of the feedback control system which establishes a functional relationship between controlled variable and feedback signal.
Requirements of a Control System
Stability, accuracy and speed of response are the three requirement s of a control system.
Stability:
A system is to be stable if the output of the system after fluctuations, variation or oscillation, if any, settles at a reasonable value for any change in input or change in disturbance.
Accuracy:
A system is said to be 100 percent accurate if the error (different between input and output) is zero. An accurate system is costly. There is no point in going for 100 percent accurate system when that much of accuracy is not really required.
Example of accuracy:
When a variation of say 0.2 degree centigrade cannot be sensed by a human being, there is no need to have a home heating system of temperature variation equal to zero.
Speed of Response
This refers to time taken by the system to respond to the given input and give that as the output. Theoretically the speed of response should be infinity, that is, the system should have an instantaneous response. This requirement is prime concern with follow-up systems.
Any ideal system is perfectly stable, 100 percent accurate and has instantaneous speed of response. Unfortunately, the requirements are incompatible. Hence there should be a compromise between these requirements.
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