COUNTER IN LIFE

Electromechanical meters (hereinafter — meters) are used in industry to control the state (account) and hold the value of any device. Whenever the effects of a constant voltage to the coil (inside the housing of the Electromechanical counter) is changing its digital readings on one. This is achieved by using a winding with the armature, which, in turn, acts on the lever spring retainer, holding the counter wheels bearing digits. The control winding is a direct current. With each exposure to the appropriate stress occurs only one pulling and one releasing of the armature coil of the counter.

 

Counters vary in weight and dimensions, electrical parameters and line numbers.

 

Simplicity and ease of use make it indispensable in many cases. For example, to account for the time of operation of diesel engines, generators and construction equipment, including tall cranes. You can do the unpretentious and reliable industrially manufactured meter and in the home. It contains a minimum of parts and is used for decades (it is almost “nothing to break”).

 

Another optional argument is the reliability of the design on mechanical scoreboard counter detects indications which are not slipping. Some counters are provided for the lever to reset all indications (bits) to zero. In the other counters, the reset is performed by opening the cover and manual movement of the wheels bearing numbers to align with zeros or another desired combination of digits (readings) Cover, put on the counter, fixed with screws, wire or sealed to prevent unauthorized changes to his testimony as an Example of this design can serve as the counter of the company Mansfeld It is powered by a DC 12 V consumption Current winding does not exceed 15 mA power supply can be any stabilized, even with half-wave rectification current Range of acceptable voltages in the range of 10 — 15 V.

 

The electrical circuit of the meter to limit simple the Polarity in this case does not matter.

 

In practice, such a device with memory state is used to control the visits to protected and storage space, but it can be successfully applied in everyday life, that is the house by connecting the circuit together with the microswitch SB1 installed on the jamb (door frame) door Microswitch, except as described in the diagram can be any group of contacts on the circuit open, for example, ПД9-1, П1М9-1T, MTS-1 and the same Except for the counter of the company Mansfeld, it is permissible to apply other industrial devices of similar design attaching the power supply in accordance with nameplate data and electrical characteristics of the specific electromagnetic counter.

 

 

The wiring connections of the counter

 

When the door is closed, the contacts SB1 turns off and the voltage at the meter is not supplied When the door is opened is the closure of the contacts of the microswitch SB1, the current flows through the electromagnet of the meter but the readings do not change until the armature of the electromagnet EM1 is released as soon As the door closes, the contacts SB1 opens, anchored electromagnetic counter releases, and readings by means of a mechanical drive is reset (change) per unit Thus, conducting periodic monitoring with an entry in a special journal or computer readings, for example, the first day of each month (depending on frequency of visits to premises) it is possible with a greater degree of accuracy to control the “passing” of the object, and in everyday home device allows you to control the situation — do not sign anyone in the apartment in the absence of its owner Because, despite the fact that your use of the room and given a key (depending on family composition), it is sometimes important to know, for example, whether the child out of the house to walk and how many times each opening and closing of the door counter will trigger only once.

 

Negative point use the recommended device is the unreliable closing of the door causing the contact bounce of the switch SB1, however, the above mentioned disadvantage is eliminated by the rigid fixing of the switch to the door frame and the periodic monitoring of all fastening points of entrance doors It is the power of a prudent owner.