Kinds of viscometers:
s the falling ball
s the vibrating probe
The principle of action is based on calculation of time of course of the set liquid volume through a narrow opening or a tube, at the set difference of pressure.
Most often liquid follows from the tank under the influence of a body weight, in that case viscosity is proportional to a difference of pressure between the liquid following from a capillary and the liquid at the same level following from very thick tube.
If the current of liquid in the device is carried out only under the influence of weight, then during the operation of the capillary viscometer kinematic (not dynamic) viscosity is defined. By means of the capillary viscometer are measured viscosity from 10 mkpas (gases) to 10 kpas.
Measurement of viscosity by means of the VPZh viscometer is based on definition of time of the expiration through a capillary of a certain volume of liquid from the measuring tank. At the same time determination of kinematic viscosity is made on a formula:
V = g/9,807*T*K, where
g - acceleration of gravity in the place of measurement,
T - expiration time,
To - a viscometer constant.
VPZh viscometers are intended for operation in conditions, rated for execution of B3 in accordance with GOST 12 997.
Viscosity of transparent liquids is defined in accordance with GOST 33-200 (ISO 3104-84).
Degree of protection against IP 00 environment in accordance with GOST 14 520.
|Name||Diameter of a capillary, mm||
Range of measurement of viscosity, mm2 / with
VPZh-2 1,31 viscometer