All posts by admin

Result oriented individual with over 25 years experience in equipment maintenance, from the design to completion, including proper use, safety and functionality; an innovative personality with tremendous knowledge and education in quality assurance, research and development. With services and managerial roles at technical level also leading and developing others, maintaining excellent interpersonal relationships at all levels, also enjoying the challenge of bringing about efficiency for the business through inspiring teams to meet their goals and personal objectives.

The Importance of Preventive Electrical Equipment Maintenance

By [http://ezinearticles.com/?expert=Mike_Pempek]Mike Pempek

When your business depends on electrical machinery and equipment for increased productivity and improved cash flow, it is extremely important to keep that machinery inspected and well-maintained on a regular basis. Preventive electrical equipment maintenance done regularly by trained, professional and experienced electrical workers helps to detect electrical problems before they become serious issues. By scheduling routine maintenance checks that utilize advanced technology and expert electrical skills, the industrial equipment and machinery on which your business runs can continue working efficiently, reducing the risk of a catastrophic failure that can cost time and money. Read on to learn the benefits of preventive electrical equipment maintenance, as well as the use of infrared thermography in detecting electrical problems.

Save Time and Money:

An effective preventive electrical maintenance program involves scheduling routine inspections and checkups on a regular basis, ensuring that your equipment and machinery is continually checked for both minor and major problems. Even small electrical problems can become more severe issues if left undetected for too long, which can lead to emergency repairs that require halted production lines and costly replacement parts. In a challenging global economy that demands cost-effective mass production on a timely basis, stopping production due to equipment failure can have major setbacks.

A Safer Workplace:

Not only can preventive electrical maintenance save businesses time and money, but by keeping equipment functioning properly, the risk of hazard is greatly reduced and the work environment becomes a safer place. Electrical equipment failure can lead to serious hazards, including fires and arc flash, which can leave workers severely injured. Equipment that is not working properly or problems that are left undetected can have unfortunate results for electricians working with or near the equipment. Machinery should be inspected frequently to identify potential problems and prevent them from becoming dangers in the workplace.

Using Infrared Thermography:

The use of infrared (IR) thermography is critical to preventive maintenance in electrical work environments. All objects radiate thermal energy, or heat, and IR cameras can detect the radiation of heat that is emitted from any given object by taking “heat” images. Through a range of colors, these images present hot spots that cannot otherwise be perceived by the naked eye. IR thermography is used to reveal loose circuits, equipment failure and safety hazards. Electrical workers can then use the thermographic images to analyze and measure temperatures, identifying problems and fixing them before they become severe.

Mike Pempek writes for the [http://www.pempek.com/]Chicago electrical contractors at John J. Pempek, Inc. They are a leading full service [http://www.pempek.com/commercial/]commercial electrical contractor offering machine service, industrial control panels, and more. All services, starting from layout to installation to maintenance are handled in-house by the firm.

Article Source: [http://EzineArticles.com/?The-Importance-of-Preventive-Electrical-Equipment-Maintenance&id=4502294] The Importance of Preventive Electrical Equipment Maintenance

pH Meter Design and Working

pH meter is an important tool in chemistry mostly used in pharmaceuticals to determine the acidity or alkalinity of different solutions. It consists of a pH probe that passes electrical signals to the pH meter and displays the pH value of the solution. For accurate measurements, however, pH meters requires proper calibration by dipping it into test solution of known pH and adjusting the meter accordingly. The test solution of known values called buffers. Learn how to calibrate a pH in three ways.

For more exposition on the subject please go through the slide

You can get more information here 

What are a light switch and a dimmer switch?

You can turn On any lights be it at home, in a machine, or vehicle by using the ‘light switch’ but sometimes for some reasons you don’t want the full beam of light therefore, you use the dimmer switch so you can go from high beam to low beam and vice versa. Sometimes the arrangement is three positions, that is, high, low and off. However some applications demand smooth control of light intensity between low and high. In this case intensity is continuously variable using any of different variations and technique used for dimmer. There are different Variations of Dimmer Switch including:

  1. Programmable dimming control via ARDUINO etc.
  2. Some phase shift control by TRIAC
  3. PWM power control
  4. Simple transistor control
  5. Steps Transformer Control
  6. Potentiometer/Rheostat

Where is a dimmer switch useful?

A dimmer will work with incandescent and LED lights, and DC motors; also heating elements such as power control of heating devices like heating element in Water Bath, Incubator, and hot air oven/sterilizers. However there are design variations and complexity but the type of simple control is not smooth but it does work. One good thing about this is that it is durable and sustainable. Precision may not be taken seriously but it is accurate.

Dimmer Switch is used in:

  • Light intensity control for ophthalmic equipment like microscope: ophthalmoscope, slit lamp, bipolar coagulating diathermy etc.
  • Light intensity control for homes and apartment
  • Could be adapted to speed control of small electric motors

How do I make a simple Dimmer switch?

The simplest dimmer switch is a variable resistor also commonly called rheostat. You achieve control by varying the resistance between the light and the power supplies. When a variable resistor is used in a circuit to vary the brightness of a light bulb, you make the resistance greater when you want a dimmer light setting and you make the resistance smaller when you want a brighter light setting. Resistance is increased by increasing the length of the path of resistive material through which the electrons have to flow, and is decreased by decreasing the length of the path. .

Resistance is calculated in an electrical circuit, like the one below, through the use of Ohm’s law, and is measured in the units of ohms.

Source(s):http://www.sciencebuddies.org/science-fa…

How do you install a lamp dimmer switch?

When you need to control the intensity of a lamp or dim it, you will need a light or lamp dimmer for this job. You could get this to buy but where you need a customized for your application, you may have to build one yourself. Here is a 12 V/24 V tested lamp dimmer circuit you can build. According to (Vandervort, HomeTips 1997), there are different types of lamp dimmers: plug-in table or floor dimmers; in-line lamp cord dimmers; and lamp base dimmers.

To install an in-line lamp cord dimmers either the mains lamp Dimmer or low voltage DC type suitable for microscopes also suitable to control small dc motor, you connect it the same way you would install an inline toggle switch on a lamp cord. When you buy the dimmer from authentic source, it will come with instructions, or follow these steps

  1. Unplug the lamp from the socket, peel and separate the two wires in the lamps cord.
  2. Check the wires to determine which one is neutral and which one is hot—the hot wire has smooth insulation, and you will rib the neutral wire. Slice the hot wire where you wish to install your dimmer.
  3. For DC application there is no hot or neutral wire, connect the switch in-between the sliced positive (red or brown wire whatever the color is)
  4. Strip about one inch of insulation off both ends of the cut hot wire.
  5. Unscrew and remove the cover of the dimmer switch. Place the neutral wire along the inside of the switch box, as specified by the manufacturer. Put the cut ends of the hot wire under the two terminal clamps, and fasten them in place by turning the screws.
  6. Screw the dimmer switch’s cover back into place. Plug the lamp in, and check to make sure the new switch is functioning.

Some CFL bulbs will not work correctly with dimmer switches while some require a special dimmer; any type of incandescent bulbs is perfect for the dimmer. I have not tried with LED but I think that would not be a problem. You could use the dimmer switch to control appliances using electric motor provided the power rating on dimmer switch is not exceeded.

References:

http://www.hometips.com/diy-how-to/lamp-…

http://www.electronics-lab.com/project/triac-based-lamp-dimmer/

 

Low Voltage Lamp Dimmer for Microscope, Slit Lamps and DC electric motor.

Find below the schematics diagram for a low voltage Pulse Width Modulated dimmer suitable for microscope, slit lamps, low voltage electric motor etc.  For information regarding for specifications; theory; construction; alignment/calibration/configuration; how to use and Bills of Quantity, check here Motor Speed Controller and or DC Light Dimmer (2016_06_01 10_11_06 UTC)…

This content is for VIP Insiders members only.
Log In Register

Effects of Electricity

Electricity produces many results even though it’s invisible but its effects could be felt. Some of its effects are magnetic, physiological, mechanical, lighting/luminosity, heating etc. and all this effects have significant importance in human life and have applications in science, medicine and industries. Check here for additional info http://www1.curriculum.edu.au/sciencepd/electricity/effects.htm. Meanwhile check the link below for additional information.

What are the effects of Electricity

The Effects of electricity Electricity is form of energy which could not be seen,but its presence could be detected due to numerous effects it has in our daily living. 1. Mechanical effect An electric fan for ventilation through the rotation of its blades; A vacuum cleaner that cleans our floors with dirt’s.These devices operate because of electricity.

 

Voltage, Current, Resistance and Relationship between Them

Electricity is  an invisible form of energy but its presence could be felt and detected due to numerous effects it has in  our daily lives. Electricity has such effects as mechanical, chemical – the  best example for a chemical effect of electricity is Electroplating, thermal – a typical example is a vacuum cleaner that cleans our dirty floors, magnetic, and luminous or light effects. For Students, Technicians and Engineers to manipulate and make effective use of electricity and electronics, we need to understand the basics. The basic of electricity starts from Voltage, Current, Resistance and Ohm’s Law which is the relationship between them. Get more from the link below.

Voltage, Current, Resistance, and Ohm’s Law

When beginning to explore the world of electricity and electronics, it is vital to start by understanding the basics of voltage, current, and resistance. These are the three basic building blocks required to manipulate and utilize electricity. At first, these concepts can be difficult to understand because we cannot “see” them.

 

Compound Microscope Parts and Their Functions

    Every microscope be it laboratory or surgical consists of three major parts the illuminations, magnifying and mechanical systems. The illumination part provides light to the microscope. This include the light bulb and electronic/electrical control which allows smooth intensity control. Magnifying otherwise called Optical Parts enlarges the specimen. Mechanical Parts supports and adjust other…

This content is for VIP Insiders members only.
Log In Register

Inside a Simple Solenoid Water Valve

(1) Inside a cheap ebay solenoid water valve  from YouTube

The video above demonstrates different component within a typical solenoid valve.

Any current carrying coil will produce a magnetic field (for example) to exert a mechanical force of attraction or repulsion on any magnetic object. The effect is the same as produced by permanent magnet but in this  case of a current carrying coil, the field could be made to turn ON or OFF as desired by switching the current through the coil ON or OFF. This magnetic effect find applications in magnetic relay and solenoid.

A solenoid is a device that produces mechanical motion when a current carrying conductor coil receives electric current. The movable portion of a solenoid is the armature. A relay is a solenoid set up to actuate switch contacts when its coil receives electric current. Pull-in current is the minimum amount of coil current needed to actuate a solenoid or relay from its “normal” (de-energized) position. Drop-out current is the maximum coil current below which an energized relay will return to its “normal” state.

Armature is the movable magnetic object, and you can move most armatures with either direct current (DC) or alternating current (AC) energizing the coil. The polarity of the magnetic field is irrelevant for the purpose of attracting an iron armature. you can use solenoids to electrically open door latches, open or shut valves, move robotic limbs, and even actuate electric switch mechanisms.