Reference Information

Nominal diameter of the connections

— the size of the inlet and outlet of the meter.

Соnnecting thread at the inlet and outlet of the meter

— classification (inch, metric) and size of the thread at the inlet and outlet of the meter.

Nominal pressure

— technical parameter of different equipment, pumps, heat exchangers, containers, operating under pressure, pipelines, fittings etc. Each product has specific sizes, based on calculations of strength. Calculations take into account the materials, selected for manufacture of the product, with specifications of their strength at 20 °C, which provides a specified service life of the equipment under certain operational pressure of the medium. This pressure is called nominal (conventional) pressure.

Мinimal consumption

— the size of the minimal flowrate (Qmin), at which the error of only ±1% is possible. This is the minimal possible flowrate for this type of flow meters.

Continuous consumption

— the size of the maximal flowrate (Qn). This is the maximal possible flowrate for this type of flow meters. Used for calculation of the obtained values.

Маx. consumption

— the size of noncontinuous (irregular) flow (Qmax). This is the maximal possible flowrate for this type of flow meters at a short period of time.

Маx. error of measurement

— the size of the maximal possible deviation of the measured value from its original meaning.

Маx. error of measurement at repeatability

— the size of the maximal possible deviation of the measured value from its original meaning at repeated measurement.

Мinimal readable quantity

— the size of the minimal quantity of the liquid, which is possible to be displayed on the flow meter.

Registration capacity

— the size of the maximal quantity of the liquid, which is possible to be displayed on the flow meter without overflow (reset of values).

Duration of registration at Qn without overflow

— the maximal time, at which the flow meter can registrate the quantity of the measured liquid without overflow at continuous consumption (Qn).

Protection filter mesh size

— the maximal possible size of the protection filter mesh (fine filter), which is installed before the flow meter.

Strainer mesh size

— the size of mesh of the filter, installed inside the flow meter.

Fuel injection pump of the diesel engine

— fuel pumps, designed for supply of certain quantities of diesel fuel to the cylinders under specific pressure and at certain time, corresponding to the load.

Pulse sensor (Reed switch)

— electromechanical device, which represents a pair of ferromagnetic contacts, sealed in a glass flask. When a permanent magnet is placed close to the Reed switch or a solenoid magnet is  turned on, the contacts are closed. Reed switches are used as non-contact switches, proximity sensors etc. 

Маx. temperature of the measured liquid

— maximal possible temperature of the measured liquid, at which the flow meter operates without operation failures.

Range of operational temperatures of the measured liquid

— the range of maximal and minimal temperatures of the measured liquid, at which the flow meter operates without operation failures.

Теmperature of the environment

— the range of maximal and minimal temperatures of the environment, at which the flow meter operates without operation failures.

Protection class (Ingress Protection Rating)

— the system of classifications of protection levels of the cover of different equipment against hard objects and water in accordance with the international standard IEC 60529 (DIN 40050, State standard ГОСТ 14254-96).

Celsius Degree (°С)

— temperature measurement unit. 0 degrees correspond to the temperature of water freezing. 100 degrees correspond to the temperature of water boiling under normal pressure.

Bar

— pressure measurement unit, which corresponds to one atmosphere. One bar equals 105 N/m².

Мilimeter

— length measurement unit, which equals 1/1000 part of the meter.

1 m = 10 dm = 100 сm = 1000 mm

Inch

— distance measurement unit in some European non-metric measurement systems. One inch equals 2,54 сm.

Liter

— metric volume measurement unit. Standard volume unit in SI system - cubical meter (m3).

1 l  = 1 dc³ = 0,001 m³

Kilogram

— mass measurement unit, one of the main units of SI system.

GPS (Eng. Global Positioning System)

 — satellite navigation system. Allows in any place on Earth (excluding subpolar areas), almost at any weather conditions, and also in space close to the planet, to define the location and speed of objects. The system is designed, implemented and used by Ministry of Defence of the USA.

The basic principle of use of the system is to define the location by means of measuring the distance to the object from points with known coordinates — satellites. The distance is calculated by the time of delay of the signal from the moment of its transmission by the satellite to its receiving by the GPS-receiver. Тhat means, to define 3-dimensional coordinates, GPS-receiver must know the distance to three satellites and time of the GPS system. Тhus, to define the coordinates and the height of the receiver, the sygnals from at least 4 satellites are needed..

Global Navigational Satellite System (GLONASS)

 — Soviet Union and Russian satellite navigation system, designed in accordance with the order of Ministry of Defence of USSR.

Russian global navigation satellite system (GLONASS), designed for quick navigational-and-time supply of unlimited number of users of land, sea, air and space bases. Access to civil sygnals of GLONASS is available anywhere in the world on the basis of presidential decree granted to Russian and foreign consumers free of charge and without restriction.