Mechanical scales: types of device, how to choose

Mechanical scales – means for measuring human body weight. The name is derived due to the mechanical design. Scales are intended for home use. Additional functions, like some electronic models, they do not. But they were the first gauges and took a firm position in the world scale.

Advantages and disadvantages

Mechanical devices needed to control body weight. They show weight matching height and age - the state of human health.

Advantages of mechanical floor scales:

• low cost;
• strength;
• It does not require special storage conditions;
• clear to any person;
• work is not dependent on electricity, batteries;
• easy to use;
• long service life.

Disadvantages of mechanical floor scales:

• error;
• No additional functions;
• limit mass weighed person.

Apparatus mechanical floor scales

Mechanical scales represent a device consisting of a platform and housing. On the upper part it is equipped with a scale protected with plastic or glass coating.

The movable platform has four stationary legs, four metal arms connected by pairs of horizontal plates, springs and rocker. The rocker is connected with the arrow tracks the spring tension changes the position of the arrow.

The base structure is represented a measuring spring which is stretched when weighing. Spring – measuring element. The sensing element is fastened to the horizontal plate.

When the pan is valid severity (subject person), the spring goes down. By stretching changes the value of the arrow on the dial.

Apply mechanical scales easily. To begin, it is set on a flat hard surface. This eliminates error which arises when installing a carpet or weights on a soft surface.

If you want to carry out regular weighing latching exact changes in body weight, the unit installed on one and the same place, as there is a risk when traveling on rough location surface.

scale controller is set to zero. To ensure properly installed hand, pay attention to the color or greasy mark on the dial, indicating the beginning of the calculation.

To determine the exact weight, weighing is recommended at the same time of day, remove the shoes and clothes. The procedure is performed through 2 hours after awakening. When weighed after the meal, the indicators are not accurate, so it is best to carry out the procedure before a meal or after a few hours.

Types of mechanical floor scales

Household

The most common type for home use. Easy to use. well enough to install them, and you can start weighing. Available, durable, long lasting. Choosing this unit, check it for accuracy. To do this, you need to weigh an object whose mass is accurately defined, for example, salt packaging. Various models show from 100 to 500 grams.

medical

Mechanical scales are used to determine the weight of sick people, patients who are undergoing rehabilitation.

Weighing in two scales that must be configured. The Catch (special lever) while weighing frees the rocker (part linkage).

The movement of the weights along a scale necessary to achieve an equal level. Once this is done, the same process is repeated for the fine scale. The value read from both scales floor mechanical weights and summed.

These scales are not intended for home use. Since the size of large and unpresentable appearance is unlikely to fit the design of the house. There are outdoor options with stadiometer. With them it is convenient to perform the calculation of matching height and weight.

trade

Similar to the medical scales, but more accurate. The distinguishing feature is the increased area of ​​the platform. Its surface is made of solid steel, it is very smooth.

industry

They are even larger size. Measured from hundreds of kilos to hundreds of tons.

The location of industrial models:

• plant;
• customs;
• point vehicle inspection;
• stock.

How to choose a mechanical scales

Load

Selecting weights determined by measuring the intended weight. Device for home use determines the weight from 1 to 150 kg. The maximum rate is 250 kg.

The weight

Depending on platform sizes, material type of the dial, and the availability of accessories varies mass balance. Compact scales weigh about a kilogram. More massive device - 2 kg +/- 0.5 kg.

feet weights

At the bottom of the unit are equipped with feet, usually four of them. Perform the function of support. manufacturing legs material - plastic or metal. Sometimes they are rubberized, which provides additional protection against slipping.

Division

Marking most models estimated one kilogram isolated scales with marks of 0.5 kg.

LCD screen

Some models have a digital display, but the mechanism of action - all the same spring. The deviation is measured by a specific sensor.

The accuracy of this set during production, reaching a value of error in the ten or hundred kilograms fraction. Readings are much easier.

Material

Body composition depends on the severity of the scale, appearance, durability.

If the housing is made of metal, it is more durable, resistant to mechanical stress. The cost would be much greater.

Plastic characterized by long time of operation, if the plastic quality. But the composition of the cabinet will not provide protection from damage caused by drops, shocks. A low-quality breaks underneath the load man.

The presence carpet

Some models are equipped with a corrugated plate, a person does not slip when weighing.

Material sight glass

There are two types of the display cover - glass or plastic. Plastic prone to clouding, scratching. Over time, the appearance will deteriorate and it is difficult to look at the scale. Tempered glass lasts longer transparent.

Dimensions digits

Lineup presented weights with different sizes of digits. If you have problems with eyesight, choose a large dial with large numerals. Better with red marks.

additional equipment

Correspondence table height and weight helps determine the state of the physical form. With special marks (color marker) stored previous weighing result or the value of the fixed weight. Function is useful when comparing indicators of body weight.

Design

Standard form is considered a circle and a square. There is also an oval, rectangular and triangular. Possible broad palette of colors.

malfunctions

Dropped connecting elements

The housing is held together by two metal parts, which when widening of leaf fall. The reason: they hold the power of crushing parts of the body. To install them back, scales disassembled and fallen items are put on the old place into the slots. The cover is in place.

The scale determines the weight properly

1. Measuring spring forms the basis of the mechanism. She stretched proportionally weighed mass. If the weight is not indicated correctly, but naturally, and you can do without repair. Set the amount of error, subtract the extra weight at each measurement.
2. Adjustment is adjustment screw. If it is to twist, the values ​​of the scale change in any direction. Thus, the normal measurement. Arrow indicates zero after weighing. When the performance of the initial weight change every time the problem is in the spring. This problem has been solved only by a new spring.

the balance mechanism jammed

If the shoulders are bent or base, the reason is exceeding the allowed weight. Housing carefully disassembled and breakage of parts is eliminated by reduction. To do this, use a hammer, vise anvil. Straighten the bent part need not inside, but pre-withdrawing.

Failure of the bearing parts

If you exceed the allowed weight of damaged leg and needed to be replaced.

How to use

1. Do not allow children to play.
2. It is set away from heat sources.
3. Storage temperature +10 to +35 degrees.
4. Immersed in water or other liquid can not.
5. You can not use fat-dissolving agents.
6. Do not overload, so it fails.
7. Protect against bumps, shocks, do not throw.
8. When storing items not placed on top.
9. Stand on the machine smoothly, with both feet.

Cleaning and Maintenance

Maintenance simple, regular maintenance will help keep in good condition.

• Use abrasive cleaners is not recommended.
• Wash prohibited in the dishwasher.
• When heavily soiled apply a small amount of detergent, then wiped with a damp cloth without submerging the unit in water or under running water.

Security measures

• Do not spill water on the platform - the surface becomes slippery, which will lead to a fall.
• Store in a dry place, protected from direct sunlight.
• After applying to wipe his moist cloth.
• Avoid immersion in water, they will fail.
• Can not jump, it will damage the measuring mechanism and other details.
• Use by children or persons with health problems is admissible only under control, ensuring the safety of persons.

Mechanical scales - a reliable tool to determine the body weight at home. When used properly, they will last a long time.