The accuracy desribes a tolerance range of measured values. Meister Strömungstechnik declares the accurary.
- in % of full scale
- in % of measuring value
- Accuracy class according to VDI/VDE 3513
The adjustment describes the procedure of adjusting the customer specified switch point.
Temperature range in the ambience of the measuring instrument.
Many instruments of Meister Strömungstechnik can be delivered with UL and/or ATEX certification. They have been checked on different aspects relevant for safety.
ATEX (ATmosphères EXplosibles) requires the employer and/or user to prevent explosions and ensure protection.
With regard to explosion protection in a potentially explosive environment, ATEX Directive 2014/34/EC and ATEX Directive 1999/92/EC take precedence over Machinery Directives and must be applied.
Swedish physicist, who defined a temperature scale in 1742. The corresponding unit is [°C]. The Celsius scale is defined by the freezing point (0°C) and the boiling point (100°C) of water.
Measuring unit depends on connection type:
Threaded connection: [in] (inch)
Flange connection, sandwich mounting, clamp connection, glue connection: [DN] (nominal size)
Hose connection: [mm] (millimeter).
Required process connection of the measuring instrument (threaded connection, flange connection, sandwich mounting, hose connection, clamp connection, glue connection)
CSA, Canadian Standards Association
The Canadian Standards Association is an organization that tests and certifies products for security relevant issues.
Magnetic-inductive measuring principle
Two magnetic coils build up a magnetic field that is flown through a conductive medium. Dependent on the speed of the flow, a measurable voltage is induced. Consequently, the flow speed can be deduced from the amount of the voltage and can be converted into a volume flow with the area cross-section.
The mass flow describes what mass of fluid flows through the cross-section of a pipe within a defined time (unit i.e.: [kg/h]).
The fluid to measure, e.g. water, oil, air.
Temperature of the medium
Relation of mass to volume of the fluid to measure under operating conditions.
Static pressure in the system at the position of the measuring instrument (units: [bar], [Pa], [psi]).
The temperature of the fluid to measure under operating conditions.
The viscosity is differed in kinematic viscosity (unit: [cSt]) and dynamic viscosity (unit: [cP]). The higher the viscosity, the viscid the medium.
A wide variety of materials are used to make seals. They are chosen depending on the medium to be measured and the operating conditions.
The sensor element defines, which measuring principle is used (e.g. float, impeller).
A SI unit is a unit belonging to the SI system of units (Système International d'unités). It was introduced in 1960 and has become the standard system for phyiscal units today.
Desired electrical output signal of the instrument (voltage 0 - 10V, current 4 - 20 mA, impulse).
Contact for electrical monitoring of flow rate limits. Normally open and change over versions.
The Underwriters Laboratories are an organization in the USA that check products concerning their operating safety. UL-certifications are issued product related and are often required for a market access in the USA.
The ultrasonic flow measurement is based on transmission and reception of sound waves with ultrasonic frequency. The flow speed can be deduced from different effects that the sound wave has on the fluid. Several methods are used for this, like a transit time measuremt or the Doppler method with wich a frequency offset of the original sound wave can be analyzed. The selection of the method is dependent on the medium.
Demineralised water is chemically clear H2O that, in contrast to distilled water, is much more contaminated. Because it is more simple and cheaper to make demineralised water, it is used much more often.
Distilled water is chemically clear H2O that doesn't contain any minerals or micro elements. It contains ions in a minor degree because of Autoprotolyse what makes distilled water conductive. Distilled water is made by evaporating and condensation of water (distillation).