Wika CAL Uživatelský manuál stáhnout pdf (Strana 49)

WIKA instruction manual WIKA-CAL

14097663.01 04/2014 GB/D

6. Object manager

Pistons can be assigned to a standard, which correspond to a model with the type of

instrument “Dead weight tester”. If the piston of the pressure balance is assigned, it

can be selected for the calibration, or is automatically pre-selected.

Weight (kg) Weight of the piston

Density (kg/m³) Density of the piston

Eective area (m²) Cross-sectional area of the piston

TC alpha + beta (1/K) The temperature coecient consists of the sum of the alpha and beta of

the piston.

Distortion coe. (1/bar) Deformation coecient of the piston

Circumference (m) Calculated circumference of the piston

Lower range limit Start of measuring range

Upper range limit End value of measuring range

Unit Pressure unit of the measuring range

Resolution Resolution of the calculated value, e.g. 0.0001

Class Selection of the class/accuracy

Class abs Selection of the class for the absolute pressure range

Medium Selection of the pressure transmission medium

Vacuum piston The piston can also act as a vacuum piston via an equaliser bar. This

lowers the pressure, with the calculation of the pressure value, when

placing the masses.

Surface tension

considered in weight

The additional weight, acting as a result of the surface tension of the

medium, which acts on the piston can also be provided directly in the

piston weight. The weight via the surface tension is ignored when setting

the option, and must be included in the piston weight.

Coe. V (Budenberg) Volume coecient, specic for Budenberg pressure balances.

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Wika CAL Uživatelský manuál Strana 49