SU127856A1 - The method of calibration of measuring devices with a capacitive dielectric sensor - Google Patents

Description

The invention relates to the field of electrical measured 1EELATURIC magnificities by means of a meter 11. Arrangement of capacitive sensors (transducers), the capacitance of which is fuickd is a 1E1 dielectric constant, 1x operated x or controlled media.

The graduation of the scale in devices with sensors of decree 1 of the 1st type IR-) has been experimentally carried out, since the analytical calculations show the indicator of visibility from considerable difficulty and 5 of the majority of cases are practically insolubable. Experimental calibration, as well as calibration, of such devices under conditions of steady state and the medium being analyzed or monitored, for example, in a stabilized colloidal system or in a solution of liquids, is suspected 1, without any difficulty. In all cases, when the analyzed sludge controlled medium is not a stable system, for example, an unstabilized coagulating colloidal pacvore or a system with an unstable ratio of phases, similar to water suspended in ice (sludge), the calibration of instruments for measuring the temperature with the relevant ice (sludge) is the same as the calibration of the instruments used with the ice. that exclude the possibility of instrument calibration in the production facilities of the YAH J

limit the field of application of capacitive sensors for or controlling certain media.

When applying the proposed method, calibrate an instrument with a dielectric sensor to produce so-called stable liquid models, the dielectric constant of which corresponds to the laboratory data obtained for samples of the measured media.

The method provides for three options for modeling unstable .. media based on the use of stable solutions. According to the first version, a stable solution is used for modeling, dielectric number 127856-2 -

The permeability of which is determined by changing the content of one or another component. In the second variant, a stable solution is used, the required dielectric constant of which is established by varying its temperature. In the third variant, a stable solution is used for modeling, the dielectric constant of which is regulated both by changing the temperature and by changing the content of one or another component.

Subject invention

Claims (3)

1. Method of calibration of measuring devices with a capacitive dielectric sensor, characterized in that, in order to stabilize the conditions of calibration when the state of the measured media is unstable or when it is impossible to prepare calibration samples in production, the samples are modeled with a stable solution, dielectric the permeability of which is established by changing the content of one or another component of the solution. 2. A method according to claim 1, wherein the samples are simulated with a stable solution, the required dielectric constant of which is established by varying the temperature of the solution. 3. Method according to np. 1 and 2, characterized in that the samples are modeled with a stable solution, the required dielectric constant. The capacity of which is determined both by measuring the temperature and by changing the content of one or another component.