RU2003055C1 - Method and device for graduating and calibration-testing of liquid meters - Google Patents

Description

The drawing shows a structural diagram of a device that implements the method of calibration and verification of counters.

The device comprises a pipeline 1, a comparison installation, consisting of parallel counters 2, 3 and A, a verifiable counter 5, a pairing unit 6, a computing unit 7 and an indication unit 8,

The device operates as follows. Frequency signals from the counters 2,3,4, 5 are fed to the inputs of the interface unit b, where they are processed and brought to a form acceptable for perception by the computing unit 7, which can be used as a personal computer. The implementation unit 7 stores the characteristics of each counter K f (fi), Q - f (fj) recorded in its read-only memory.

When signals from the counters 2, 3, 4 arrive at it, K) and QI are selected and the frequencies fj are divided by Ki, then happens

summation - & - and QI of all counters. Otherwise m

the formula is implemented

M (/ v Jil + l 2,

.NVЈ K | 1 + Kl2 + K | 3- QD He + Qia + Qi3

In this way, a unit of volume is reproduced and instantaneous flow rate is determined. Next, the quantitative value of the measured volume V is set, during the passage of which N pulses are accumulated from the verified meter, then

10 5

0

5

0

N

the division of y - Ksc. where Kni is the conversion coefficient of the verified meter at the flow rate Qj). The numerical values of Q 2) and Kni are displayed on the information displaying unit 8 (display ;. After determining the dependence Kn f (QS), the error calculation of the verified counter is determined by the program recorded in the memory of calculation unit 7 and the information is output (printer) as printed document.

Using the proposed method of calibration and calibration of liquid meters provides an increase in reliability compared to existing comparison methods by eliminating the systematic component of the error associated with the uterine flow unit, expanding the scope of the installation, as it allows calibration and calibration of meters at any expense that falls within the range of expenditures of exemplary funds. Reducing the time of calibration and verification is achieved due to the absence of the need to set the target costs on all working reference meters, as well as through the use of software and hardware that automates the process of processing information processing.

(56) Copyright certificate of the USSR No. 1122893, cl. G 01 F 25/00.

Biryukov B.V. et al. Testing facilities4 flowmeters. M .: Energoatomizdat, 1983, p. 91.

Claims (2)

1. A method of calibrating and verifying a liquid meter, which consists in generating an exemplary signal by means of parallel flow comparison, comparing an exemplary signal formed as the sum of indications of exemplary counters with a verified meter signal, characterized in that when generating an exemplary signal, the output signals of exemplary counters are corrected comparison plants in accordance with their individual calibration characteristics, depending on the set flow rate. 2. A device for calibrating and verifying a liquid meter, comprising a comparison apparatus consisting of parallel connected standard liquid meters, configured to be connected to a pipeline, an indication unit and a computing unit, characterized in that an interface unit is additionally inserted into it, connected by inputs to the outputs of the reference counters, and by outputs connected to a computing unit, connected by an output to the indication unit, wherein the reference unit is configured to be connected to a verified meter liquids.