SU1354059A1 - Device for calibration test of gas analysers - Google Patents

Abstract

The invention relates to means for supplying gas samples from fixed volumes in the form of cylinders with test gas mixtures and improves the accuracy of determining the dynamic characteristics of gas analyzers (G). The device contains cylinders 1.2 with test gas mixtures. Cylinders 1.2 are connected 1 by pipelines 3 and 4, in which chokes (D) 5 and 6 are installed with receivers (P) 7 and 8, the pressure in which is controlled by pressure gauges 9 and 10. The first outlets P 7.8 through the closing and the disconnecting contacts of the flow switch 11 are connected to G 12. In the pipelines 13 and 14, solenoid valves 15 and 16 and D 17, 18 are installed, through which the second outputs P 7 and 8 are connected to the reset line 19. G 12 is connected to the recorder 2, (timer). To control the sequence of operations, the device contains a software block 21 connected to the control inputs of the switch 11, valves 15, 16 and the recorder 20. 1 sludge. с 9 (Л 21 .сэр 12 20 Ф о Ю 14 18 19 V Cffpoc

Description

The invention relates to means for supplying gas samples from fixed volumes in the form of cylinders with calibration gas mixtures and can be used to determine the dynamic characteristics (response time, transport delay, constant transient time, full set-up time) of gas analyzers,

The purpose of the invention is to improve the accuracy of determining the dynamic characteristics of gas analyzers.

The drawing shows a block diagram of a device for calibrating gas analyzers.

The device contains cylinders and 2 with calibration gas mixtures (CBC), connected by gas pipelines 3 and 4, in which 5 and 6 throttles are installed, with receivers 7, and 8, the pressure of the latter is monitored by small meters 9 and 10. 25 inputs of electromagro switch 11 and 7 and 8, respectively, normally open and normal closed channels of flow switch I1 are connected to a gas analyzer 12, solenoid valves 15 (normally closed) and 16 (normally open) and throttles 17 and 18 are installed in gas lines 3 and 14, through which the second Exit 7 and receivers

8 are connected to the reset line 19. Gazo 35 opens the CBC from the receiver

the analyzer 12 is connected to the recorder 20 (timer),

To control the sequence of operations, the device comprises a software block 21 connected to the control inputs of the switch 11, valves 15 and 16 and the recorder 20.

The device works as follows.

The calibration gas mixture from the cylinder 1 through the throttle 5 through the inlet gas line 3 enters the receiver 7 with a manometer 9 installed on it, then from the receiver 7 through the normally open channel of the switch 11 to the gas analyzer 12, the electrical output of the gas analyzer is recorded by the recorder 20.

The throttle 5 is installed on the pressure gauge 9, the pressure of the OPO in the receiver 7 and, respectively, at the inlet of the gas analyzer 12g equal to the pressure of the sample in the operating mode of the latter.

7 through line 13 to line 19, this automatically establishes the equality of the pressures in the receivers 7 and 8 and at the inputs of the switch 40 liters 11,

The timer - the recorder 2 captures on the chart tape a throw of the input signal, which corresponds to the origin of the jump time 45 of the CGS supply to the gas analyzer 12.

After the voltage is removed from the switch 1I, the solenoid valves 15 and 16 by the block 21, the CGP is fed in the reverse order: from the cylinder 1 on the gas analyzer 12, and from the b Allon 2 - to discharge into line 19

The invention allows for a discontinuous change in concentration - f. CBC at the inlet of the gas analyzer at constant pressure, which excludes the occurrence of dynamic impact and distortion of the transient response of the gas analyzer.

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At the same time, the ASG (different in the concentration of the measured component) from cylinder 2 through throttle 6 is

the inlet pipeline 4 enters the receiver 8 with a pressure gauge installed on it, then through the second outlet of the receiver 8 the OPG enters through the normally open inlet of the solenoid valve 16 in the pipeline 14 and the throttle 18 into the discharge line 19.

The throttle 18 allows you to set the pressure of the OPO on the pressure gauge 10 in the receiver 8 and, accordingly, at the inlet to

normally closed channel switch 1 I, equal to the pressure of the sample in the operating mode of the gas analyzer 12.

Thus, the ASG from the cylinder 1 enters the gas analyzer 12, and

from cylinder 2 - to discharge, while the pressure values in the receivers 7 and 8 are exactly the same.

On a signal from program block 21, the voltage is applied to the controllers.

filler valves 15 and 16 and recorder 20 is a timer.

In this case, the switch 11 switches; the CGS passes from the cylinder 2 to the gas analyzer 12; the shut-off solenoid valve 16 blocks the CGS reset from the receiver 8,. and shut-off solenoid valve

5 opens the CHS reset from the receiver.

7 through line 13 to line 19, this automatically establishes the equality of the pressures in the receivers 7 and 8 and on the inputs of the switch 0 l 11,

Timer - the recorder 20 captures on the chart tape the input signal, which corresponds to the beginning of the countdown time jump-5 filing CBC to the gas analyzer 12.

After the voltage is removed from the switch 1I, the solenoid valves 15 and 16 by the block 21, the CGP is fed in the reverse order: from the cylinder 1 to the gas analyzer 12, and from the b Allon 2 to a reset to line 19.

The invention allows for a discontinuous change in concentration - f. CBC at the inlet of the gas analyzer at constant pressure, which excludes the occurrence of dynamic impact and distortion of the transient response of the gas analyzer.

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Claims (1)

Invention Formula A device for calibrating gas analyzers containing cylinders with test gas mixtures, gas pipelines with throttles placed in them and a program block connected to the control input of flow switches installed in the gas mixture supply line to the gas analyzer, the output of which is connected to the discharge line, characterized by that, in order to improve the accuracy of determining the dynamic characteristics of And, Horn Compiled by T. Chulkova Tehred M. Khodanych Order 5685/37 Edition 776 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d.4 / 5 Production and printing company, Uzhgorod, st. Project, 4 Gas analyzer peak, the device additionally contains receivers with pressure gauges and solenoid valves connected by control inputs to the corresponding outputs of the program block, the input of each receiver is connected via a choke with a calibration gas mixture through the corresponding output of the receivers to the gas analyzer , and the second outputs of the receivers through the in-. Custom electromagnetic valves are connected to the discharge line. five 0 Proofreader G. Reshetnik Subscription