Electrical devices which provide a 4-20 mA (milliamp) signal are important tools for providing reliable communication between sensors and control devices over long distances. Analog 4-20 mA signals are used in many processes, including chlorination of water, vibration monitoring, pressure sensing and climate control. A multimeter is used to diagnose 4-20 mA analog signal control loops. In process water chlorination, sensors detect chlorine levels and send signals to a controller.

The lamps in BenQ projectors have a limited lifespan, and need replacement after approximately 2000 hours of use. To keep track of the amount of lamp hours used, BenQ designed their projectors with a lamp hours counter to monitor the use of the lamp. When a new lamp is placed in the projector, you need to reset the lamp hours counter to ensure proper monitoring of your lamp. Turn on the projector after replacing the lamp.

Indoor privacy screens, also known as Japanese shoji screens, have existed since the early eighth century AD. Though originally made in China, it was in Japan that these screens developed into what they are today. Privacy screen. Most screens are translucent and are constructed of multiple folding panels made of bamboo or cedar and rice paper or fabric. The screens are traditionally used to create space within a room or home.

Decorative moldings such as raised panels and chair rails can add attractive architectural detail to any interior. As with any woodwork, chair rails require a certain amount of maintenance. Most moldings are attached using nothing but nails and over time can become loose. Once a piece of woodwork breaks loose of its fasteners, it is only a matter of time until it will need major repair. Using caulk to seal the seams of chair rails can give them just the extra bit of flex they need to maintain their position for years to come.

Hard water often contributes to mineral deposits on various surfaces, including stainless steel. When white or chalky looking areas appear inside of your stainless steel pans, a wash with hot water and soap will not suffice. These mineral deposits must be dissolved with a common household product. Fill the pan with the mineral deposits approximately halfway full of hot water. Pour the white vinegar in the pan.

A small room with no windows can be a challenge to decorate. Not only is the space confined, but also the lack of natural light can make it look even smaller than it is. With a little creativity and some basic accessories, however, you can make the room inviting. Mirrors will make the space seem larger. Things You Will Need + Paint Lighting Mirrors Painting or photograph Curtains Furniture Think outside of this little windowless box, and you'll come up with a space in which you want to spend more time.

Noisy, rattling windows are generally caused by one of two things--a loose glass pane, or a loose frame. The first case generally afflicts older windows, where the glass has traveled down the pane, causing the top of the window pane to become thinner than the bottom. Fix noisy, rattling windows. The second case is more common on wood framed windows, where the wood can warp and shrink with the weather.

A rolling gate for a chain-link fence provides a way to close a wide opening in the fence, such as a driveway. The gate consists of a tubular steel frame with wire chain-link fabric stretched across it. Attached to the frame are two rear guide wheels that sit on a pair of pipe guides attached to the fence, which act as the tracks for the gate. Another set of wheels mounted to the bottom end of the gate hold the gate up off the ground.

Wall heaters are of relatively simple construction, but if they are not maintained properly, they can possibly pose a fire threat. They are durable and they are good for zone heating control. Wall heaters all have their own thermostat, so rooms that do not need to be heated can have their thermostat turned off. Even though they are durable, they do occasionally develop problems. Things You Will Need + Screwdriver Multimeter Warning Vacuum around the heater occasionally to prevent dust buildup.

Some sunrooms are built with standard roofs, made from decking, shingles and felt paper. Other sunrooms are constructed with all-glass walls and ceilings. Replacing the roof of your sunroom will depend greatly on the type of roof that your sunroom has. To replace a standard roof with shingles, felt paper and decking, you will need to tear down the roof to the decking and replace what is rotten. If your sunroom has a glass roof, you will need to replace the sealant around the windows.