KR20010000099A - Control Circuit and its Method for Gas Analyzing System - Google Patents

Abstract

PURPOSE: An operating circuit of a gas analyzer and method for controlling operating circuit is provided to improve precision of gas analysis by making a gas condition to be measured in constant temperature and humidity. CONSTITUTION: An operating circuit of a gas analyzer includes a solenoid valve driving circuit(110) for controlling an on/off action of a solenoid valve(60), a control circuit(120) for measuring a temperature of a heater and a dehumidifier and turning the temperature into a set temperature, a pump driving circuit(130) for controlling an on/off action of a pump(80), a key input unit(10) for inputting an operation order and a system setting value to the gas analyzer, a display(30) for visually displaying data, measured time and analyzed result, a digital signal processor(100) for processing the measured temperature, humidity and gas data into digital signal, a memory(20) for storing program of gas analysis and for storing data detected from a sensing part, and a controller(50) connected with the above circuits and an external computer and for controlling the operation of the whole system.

Description

Control Circuit and its Method for Gas Analyzing System

The present invention relates to a gas analyzer capable of detecting and analyzing single and mixed gases, and in particular, analyzing a gas using a plurality of semiconductor MOS type gas sensors, and making the gas state of the measurement object constant temperature and constant, and thus the accuracy of gas analysis. The present invention relates to an operation circuit of a gas analyzer and a control method thereof, in which gas is easily corrected according to a period of use.

Currently, a single gas measuring device using a semiconductor MOS (Metal Oxide Silicon) type sensor has been produced and developed by a number of companies at home and abroad, such as alcohol meter and methane gas meter. These products do not target accurate gas concentration measurements, but simply measure what the gas concentration is above.

As an example of a gas measuring apparatus using a conventional MOS type gas sensor, it is described in Japanese Patent No. 2578, 624 or Korean Patent No. 1999-029465. If the load resistance is connected in series to the MOS type gas sensor, the gas concentration is measured by using the output voltage according to the concentration. Here, it is well known that the resistance value of the MOS sensor itself and the gas concentration have a linear relationship.

However, in the case of the MOS type gas sensor, the resistance drops by about one third after one year. This is a factor that makes accurate concentration measurement impossible in the gas analyzer adopting the MOS type gas sensor, so it is necessary to calibrate at regular intervals in order to improve the accuracy of the gas. Then, the resistance value of the MOS sensor changes due to the change in temperature and humidity (see Electronic Nose Conference 99). The MOS sensor has a smaller change in resistance value due to temperature and humidity than other gas sensors that are most affected by temperature and humidity around the workplace, but this also causes errors in gas analysis. It should be kept at constant temperature and humidity. When the temperature and humidity of the sensor are achieved, it is possible to analyze the gas accurately by changing the basic data that is regularly calibrated.

However, in order to achieve the constant temperature and humidity function, the existing product uses a cooler in the product or a low temperature gas is used in a closed space, so that the whole product becomes inconvenient to carry. Alternatively, the analysis device that absorbs the sample gas (TENAX) as a gas absorber and emits it to a high temperature of about 200 ° C. or higher detects it through the sensor, but this is also highly accurate. There is a problem that the drift phenomenon occurs.

On the other hand, the gas analyzer for measuring the mixed gas is largely divided into two types are produced in the United States, Japan and Europe. One is a portable product, which is convenient to use, but these products are mainly used to measure gases that do not require precision because they are limited in compensating the effects of temperature and humidity in gas analysis. The other is a gaseous analytical product, with gas analyzers centered on Shimadz Co. in Japan, Osmotech plc and AlphaMos plc in Europe. It is inconvenient to move and expensive, and it uses a conductive polymer sensor. However, the lifetime of the conductive polymer sensor is only a few months, and the analyzer has a weak characteristic of temperature and humidity, which makes it difficult to correct it.

Therefore, if the design is not significantly affected by temperature and humidity, the size of the gas analyzer for measuring and analyzing a single gas or a mixed gas increases, which causes a lot of problems. In order to solve this problem, a gas analyzer that is easy to move, easy to adjust over time, and has a small system size for constant temperature and humidity is absolutely necessary.

An object of the present invention is to provide a heater and dehumidifier for constant temperature and humidity characteristics so as not to be most affected by the temperature and humidity in the analysis device in order to solve the problems of the prior art as described above, the measurement mode, correction required in the system The internal operation circuit including heater and dehumidifier can be properly controlled according to the drying mode and the serial communication mode to increase the accuracy of the gas analysis results. The present invention provides an easy operation circuit and a control method thereof.

1 is a system configuration diagram mainly showing the operation circuit of the gas analysis device according to the present invention,

Figure 2 is a flow chart for explaining the operation during the measurement (measurement) in the gas analyzer according to the present invention,

3 is a flowchart illustrating an operation process during calibration using a sample gas in a gas analyzer according to the present invention;

Figure 4 is a flow chart for explaining the operation of the serial communication mode in the gas analyzer according to the present invention.

Explanation of symbols on the main parts of the drawings

10: key input unit 20: memory

30: display unit 40: communication circuit

50: control unit 60: solenoid valves

70: heater and dehumidifier 80: pumps

90: detection unit 100: digital signal processing unit

110: solenoid valve driving circuit

120: temperature control circuit 130: pump driving circuit

In order to achieve the above object, the present invention provides a sensing unit having at least one gas, humidity and temperature sensor, a heater and a dehumidifier, at least one pump for controlling a gas flow rate between an inlet and an outlet, and the heater And an operation circuit of a gas analyzer having at least one solenoid valve for controlling gas movement to a dehumidifier, comprising: a solenoid valve driving circuit for controlling on / off of the solenoid valve; A temperature control circuit for measuring the temperature of the heater and the dehumidifier and making it to a set temperature; A pump driving circuit controlling on / off of the pump; A key input unit for inputting an operation command and a system setting value to the gas analyzer; A display unit for visually displaying data, measurement time, and analysis result detected through the detection unit; A digital signal processor for digitally processing the temperature, humidity, and gas data measured by the detector; A memory for storing a program of gas analysis and storing data detected by the sensing unit; And a control unit interconnected with the circuits and in communication with an external computer and controlling the operation of the entire system to correspond to the selected measurement, calibration / dry or communication mode for gas analysis.

In the apparatus of the present invention, the digital signal processing unit is composed of a multiplexer and an analog-digital converter, and it is preferable to use the control unit and the one-chip processor. And in the apparatus of the present invention, it is further provided with a buzzer that makes a sound during abnormal operation.

In order to achieve the above object, the present invention provides a method for controlling a gas analyzer, the method comprising: receiving air by driving a pump at an inlet side when the gas analyzer is in a measurement mode for analyzing a gas; Controlling on / off of at least one solenoid valve, respectively, to supply the air to a dehumidifier and to flow a sample gas to be measured to a heater; Driving a heater to heat the gas to a constant temperature; Operating the pump on the outlet side to introduce air into the sensing unit to measure a gas sensor, temperature and humidity; Receiving the measured data from the sensing unit; Determining whether the temperature measured by the sensing unit is lower than a set value; Operating the heater again if the measured temperature is lower than the set temperature, otherwise leaving the heater as it is; And displaying the temperature, humidity, and gas sensor data measured outside. At this time, after displaying the data, it is detected whether a stop command of gas analysis is input, and if a stop command is detected, the measured data is continuously received from the sensing unit, but otherwise, the system is initialized and the It is preferable to initialize the sensor of the detection unit.

In addition, the control method of the gas analyzer of the present invention, the method comprising: determining whether the initialization when the gas analyzer is in the correction mode; Controlling on / off of at least one solenoid valve, respectively, for flowing sample gas to a heater; Driving a heater to heat the gas to a constant temperature; Operating a pump at an inlet side and a pump at an outlet side to introduce gas into the sensing unit to measure a gas sensor, temperature, and humidity; Receiving the measured data from the sensing unit; Determining whether the temperature measured by the sensing unit is lower than a set value; Operating the heater again if the measured temperature is lower than the set temperature, otherwise leaving the heater as it is; And displaying the temperature, humidity, and gas sensor data measured outside. At this time, after displaying the data, it is detected whether a stop command of gas analysis is input, and if the stop command is detected, the measured data is continuously received from the detection unit, but otherwise, the system is initialized. desirable.

In addition, the control method of the gas analysis device of the present invention, if the gas analysis device is in the calibration mode, determining whether the initialization; Receiving air by driving a pump at an inlet side; Controlling on / off of at least one solenoid valve, respectively, for flowing said air to a heater; Driving a heater to heat the air to a constant temperature; Operating a pump at an inlet side and a pump at an outlet side to measure the gas sensor, temperature, and humidity by introducing air into the sensing unit; Receiving the measured data from the sensing unit; Determining whether the temperature measured by the sensing unit is lower than a set value; Operating the heater again if the measured temperature is lower than the set temperature, otherwise leaving the heater as it is; And displaying the temperature, humidity, and gas sensor data measured outside.

In the control method of the gas analyzer of the present invention, when the gas analyzer is in the drying mode, driving the pump on the inlet side to receive air; Making zero gas using a filter; Controlling on / off of at least one solenoid valve, respectively, for flowing said air to a heater; Driving a heater to heat air to a predetermined temperature; And discharging air to the outside by operating the pump on the outlet side.

In addition, in the method of controlling a gas analyzer of the present invention, when the gas analyzer is in a communication mode with an external computer, the external computer may determine a mode of the gas analyzer in a schedule mode for gas analysis for a predetermined period. Determining whether or not to set the gas measurement mode; And transmitting the measurement data between the gas analyzer and the external computer through a series of processes according to the set mode of the gas analyzer, and storing and analyzing the measured data in the external computer.

Therefore, the operating circuit and control method of the gas analyzer according to the present invention controls the gas analyzer having a heater and a dehumidifier for constant temperature and humidity so as not to be most affected by the temperature and humidity in the analyzer. According to the measurement mode, calibration and drying mode, and serial communication mode required by the controller, the internal operation circuit including the heater and the dehumidifier can be properly controlled to increase the accuracy of the gas analysis results. The calibration not only reduces errors in gas measurement data, but also allows remote control of the system by connecting to an external computer via a communication network.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a system configuration diagram mainly showing the operation circuit of the gas analysis device according to the present invention.

As shown in FIG. 1, the present invention includes a sensing unit 90 having at least one gas, humidity, and temperature sensor, a heater and a dehumidifier 70 as a load for constant temperature and humidity, and an inlet and an outlet. In the operating circuit of the gas analysis device having at least one pump (80) for controlling the gas flow rate in the gas and at least one solenoid valve (60) for controlling the gas movement to the heater and the dehumidifier (70), The solenoid valve driving circuit 110 for controlling the on / off of the solenoid valve 60, the temperature control circuit 120 for measuring the temperature of the heater and the dehumidifier 70 to make the set temperature, and the pump 80 Pump driving circuit 130 for controlling the on / off of the control panel, a key input unit 10 for inputting an operation command and a system setting value to the gas analyzer, data detected through the sensing unit 90, measurement time and Visual display of analysis results 30, a digital signal processor 100 for digitally processing the temperature, humidity, and gas data measured by the detector 90, and a program of gas analysis, and the data detected by the detector 90. A memory 20 which stores the data, and which is interconnected with the circuits and is in online communication with an external computer (not shown), operating the entire system to correspond to the selected measurement, calibration / dry or communication mode for gas analysis. Control unit 50 for controlling the. In addition, it further comprises a buzzer 140 that makes a sound during abnormal operation.

In the embodiment of the present invention, the solenoid valve and the pump are each limited to two, wherein the first pump 82 and the second pump 84 are located at the inlet side and the outlet side, respectively, to adjust the flow rate of the gas. The first solenoid valve SV1 filters air to send gas to the heater and the dehumidifier, and the second solenoid valve SV2 supplies the sample gas to the heater.

Here, the digital signal processing unit 100 of the present invention includes a multiplexer 102 that receives a signal measured by a sensor of the sensing unit 90, and an analog-to-digital converter (ADC) that modulates the analog signal of the multiplexer into a digital signal ( 104). In this case, the controller 50, the multiplexer 102, and the ADC 104 may be one-chip.

In addition, the gas analyzer of the present invention further includes a communication circuit 40 having an RS232C standard for online communication with an external computer (not shown).

The operation circuit of the gas analyzer of the present invention having such a configuration can be divided into three types: (1) measurement mode, (2) calibration and dry mode, and (3) communication mode. In this case, the operation of the gas analyzer related to the corresponding mode is described in detail with reference to FIGS. 2 to 4.

Figure 2 is a flow chart for explaining the operation during the measurement (measurement) in the gas analyzer according to the present invention.

As shown in FIG. 2, when the gas analyzer is in the measurement mode for analyzing gas, the pump driving circuit 130 drives the first pump 82 at the inlet side to collect and correct air through the filter. Receive zero-gas for removal of moisture and moisture. The zero solenoid valve SV1 is turned on by the solenoid valve driving circuit 110 and the second solenoid valve SV2 is turned off so that the zero gas flows to the dehumidifier and the sample gas to be measured flows to the heater. (See S21 to S22)

The temperature control circuit 120 drives the heater to heat the gas to a constant temperature to maintain a constant temperature. In addition, the gas heated by the heater maintains a constant dry state of the moisture of the measurement gas by a temperature difference with the dry and cold zero gas that is discharged through the first solenoid valve SV1 through the dehumidifier.

Then, the second pump 84 on the outlet side is operated by the pump driving circuit 130 to introduce dry gas of the dehumidifying device into the sensing unit 90 so that the gas flows through the gas sensor, the temperature and humidity sensor. Measure the condition. (See S23-S24)

Thus, the data measured by the sensing unit 90 is input to the control unit 50 through the digital signal processing unit 100, the control unit 50 is determined by determining whether the temperature measured from the sensors of the sensing unit is lower than the set value When the temperature is lower than the set temperature, by re-controlling the temperature control circuit 120 to operate the heater to bring the gas to a constant temperature, otherwise the heater is stopped as it is. (See S25 to S27b)

Then, after displaying the measured temperature, humidity, and data of the gas sensor on the display unit 30 such as an LCD, it is detected whether a stop command for gas measurement is input. If the stop command is detected, the sensor continuously receives the measured data. Otherwise, the sensor is initialized (initializing the sensor data and returning to the start mode). . (See S30-S31)

3 is a flowchart illustrating an operation process during calibration using a sample gas in the gas analyzer according to the present invention.

As shown in FIG. 3, when the gas analyzer of the present invention is in a calibration mode, the gas analyzer is divided into two, one of which is readjusted based on air, that is, zero gas, and the other is an addictive gas. With the exception of the system, four or more concentration states such as 500ppm, 1000ppm, 1500ppm, 2000ppm, etc., are injected as sample gas and adjusted to the difference. However, the concentration state can be set differently here. Here, the data on the injection concentration of the sample gas is stored in the EEPROM of the memory 20 or a database of an external computer. This stored data is then learned by the neural network and used for accurate reference data.

First, in the correction mode using the sample gas, it is determined whether the gas analyzer is initialized, and the solenoid valve SV 1 is turned off by the solenoid valve driving circuit 110 to flow the sample gas to the heater, and the second solenoid valve SV 2 is performed. ) Is on. If it is not in the initialization state, the test mode is entered. (See S211 to S12)

In addition, the temperature control circuit 120 drives a heater to heat the sample gas to a constant temperature to maintain a constant temperature. In addition, the gas heated by the heater is removed from the moisture of the measurement gas by the temperature difference with the dry and cold zero gas from the first solenoid valve SV1 through the dehumidifier to maintain a constant dry state.

Then, the pump driving circuit 130 operates the first pump 82 on the inlet side and the second pump 84 on the outlet side to introduce the sample gas into the sensing unit 90 so as to introduce a gas sensor, temperature and humidity. Measure the state of gas entering through the sensor. (See S13-S14)

The data measured by the detector 90 is input to the controller 50 through the digital signal processor 100, and the controller 50 determines whether the temperature measured by the sensors of the detector is lower than a set value (Temp <30 ° C.). If the measured temperature is determined to be lower than the set temperature, by re-controlling the temperature control circuit 120 to operate the heater again to make a constant temperature of the gas, otherwise (Temp ≥ 30 ℃) to stop the heater as it is. (See S15 to S17b)

Then, after displaying the measured temperature, humidity, and data of the gas sensor on the display unit 30 such as an LCD, it is detected whether a stop command for gas measurement is input. (Refer to S18 to S19) If a stop command is detected, the measured data is continuously received from the sensing unit 90. If not, the system is initialized (sensor data ends and returns to the start mode). (See S20 to S31)

Therefore, this correction function prevents the drift of the gas due to the aging period of the MOS sensor in the gas analyzer, the exposure to moisture, or the aging phenomenon, thereby minimizing the error of gas concentration measurement and analysis. do. That is, the data is obtained and stored at various PPM levels in a stable state before measurement, and used as reference data in actual gas measurement.

On the other hand, the second correction method is based on air, that is, zero gas (Zero-gas), which is solenoid valve driving circuit 110 while driving the first pump 82 to supply the zero gas to the heater The first solenoid valve SV1 is turned on and the second solenoid valve SV2 is turned off. The control scheme is then the same as the first correction processor described above.

The gas analyzer of the present invention also has a drying function, which releases moisture collected in the dehumidifier into the atmosphere to maintain a constant dry state. This is essential by protecting the life of the sensor. In general, gas sensors have a shortened lifetime in inverse proportion to humidity, which is provided by the TGS sensor's data-sheet and is already well known in the academic community. Therefore, the drying function is essential in the gas analyzer.

Thus, when the gas analyzer is in the drying mode, the controller 50 drives the first pump 82 at the inlet side through the pump driving circuit 130 to input air, that is, dry zero gas, and heats the zero gas to the heater. Both the first solenoid valve SV1 and the second solenoid valve SV2 are turned on in order to flow into the.

Then, the heater is driven through the temperature control circuit 120 to heat the zero gas to a constant temperature, and zero gas heated by the heater is discharged to the outside through the dehumidifier by the operation of the second pump 84 on the outlet side. do. In this case, when the heating temperature of the heater is about 150 ° C. or more, the zero gas becomes hot at a temperature of 60 ° C. or more. The heated zero gas does not affect the gas sensor of the sensing unit 90. Since the MOS-type gas sensor is already heated and driven to a temperature of 100 ° C. or higher for operation, it is not affected by hot air at all.

4 is a flowchart illustrating an operation process in a serial communication mode in the gas analyzer according to the present invention. As shown in FIG. 4, when the gas analyzer of the present invention is in a communication mode with an external computer, the external computer may control the gas analyzer.

First, the external computer determines whether to set the mode of the gas analyzer as undecided, the schedule mode for analyzing the gas for a predetermined period, or the gas measurement mode, and according to the set mode of the gas analyzer, The measurement data is transferred between the computers through a series of processes to be stored and analyzed in an external computer. (See S40 to S41c)

In other words. The external computer receives the data transmitted from the gas analyzer and analyzes it when the mode of the gas analyzer is undefined. (See S43-S44)

If the gas analyzer is set to the schedule mode, the schedule is set and the set value is transmitted to the gas analyzer to set the same schedule, and the gas analyzer performs the gas measurement mode to measure the measured data. Transfer it to an external computer and store and analyze this data on the external computer. (See S45 to S51)

If you set the gas analyzer to the measurement mode from an external computer, initialize the system by initializing and transferring the initialized data values to the gas analyzer, and perform the gas measurement mode on the gas analyzer to transfer the measured data to the external computer. The data is stored and analyzed by an external computer. (See S52 to S58)

Therefore, the gas analyzer of the present invention can be usefully used for dangerous gas detection and measurement because the system can be remotely controlled from an external computer by such online communication.

As described above, the present invention, according to the measurement mode, calibration and drying mode, and the serial communication mode required in the system of the gas analyzer, by appropriately controlling the internal operation circuit including the heater and the dehumidifier to improve the accuracy of the gas analysis results In addition to reducing errors in gas measurement data by calibrating the reference data at regular intervals during measurement, the system can be remotely controlled by connecting to an external computer through a communication network, allowing data storage and analysis from the outside. have.

Therefore, the gas analyzer of the present invention can monitor the harmful environment in real time and can be usefully used to control the production and quality control of chemicals including perfumes, cosmetics, odor components, and new drug development. Moreover, it can be used in related fields such as process control of gas and chemical plants through real-time monitoring, detection of explosive gas and detection of harmful gas to human body, and prevention of disaster caused by harmful gas of buried network management personnel. Adjusting the freshness and shelf life of beverages, determining the freshness of raw materials in the food industry such as fruits, vegetables, fish, meat and grains, real-time monitoring to remove the harmful environment around patients and patients in hospitals, It can also be applied to other applications such as measuring and classifying odors to doctors.

On the other hand, the present invention is not limited to the above-described embodiment, various modifications are possible by those skilled in the art within the spirit and scope of the present invention described in the claims to be described later.

Claims (14)

A sensing unit having at least one gas, humidity and temperature sensor, a heater and a dehumidifier, at least one pump for controlling a gas flow rate between an inlet and an outlet, and gas movement to the heater and the dehumidifier In the operating circuit of the gas analyzer having at least one solenoid valve A solenoid valve driving circuit controlling on / off of the solenoid valve; A temperature control circuit for measuring the temperature of the heater and the dehumidifier and making it to a set temperature; A pump driving circuit controlling on / off of the pump; A key input unit for inputting an operation command and a system setting value to the gas analyzer; A display unit for visually displaying data, measurement time, and analysis result detected through the detection unit; A digital signal processor for digitally processing the temperature, humidity, and gas data measured by the detector; A memory for storing a program of gas analysis and storing data detected by the sensing unit; A gas analysis device interconnected with the circuits and in communication with an external computer and having a control unit for controlling the operation of the entire system to correspond to the selected measurement, calibration / dry or communication mode for gas analysis. Of working circuit. 2. The operation circuit according to claim 1, wherein the digital signal processing unit comprises a multiplexer and an analog-digital converter, which is one-chip with the control unit. The operation circuit of the gas analyzer of claim 1, further comprising a buzzer that makes a sound during abnormal operation. In the control method of the gas analyzer, When the gas analyzer is in the measurement mode for analyzing the gas Receiving air by driving a pump at an inlet side; Controlling on / off of at least one solenoid valve, respectively, to supply the air to a dehumidifier and to flow a sample gas to be measured to a heater; Driving a heater to heat air to a predetermined temperature; Measuring a gas sensor, temperature, and humidity by introducing a gas into the sensing unit by operating a pump on an outlet side; Receiving the measured data from the sensing unit; Determining whether the temperature measured by the sensing unit is lower than a set value; Operating the heater again if the measured temperature is lower than the set temperature, otherwise leaving the heater as it is; And Control method of a gas analyzer comprising the step of displaying the temperature, humidity, and the data of the gas sensor measured outside. 5. The method according to claim 4, wherein after displaying the data, it is detected whether a stop command of gas analysis is input, and if a stop command is detected, the measured data is continuously received from the sensing unit, but otherwise the system And initializing the sensor of the detection unit. In the control method of the gas analyzer, When the gas analyzer is in calibration mode Determining whether it is initialization; Controlling on / off of at least one solenoid valve, respectively, for flowing sample gas to a heater; Driving a heater to heat the gas to a constant temperature; Operating a pump at an inlet side and a pump at an outlet side to introduce gas into the sensing unit to measure a gas sensor, temperature, and humidity; Receiving the measured data from the sensing unit; Determining whether the temperature measured by the sensing unit is lower than a set value; Operating the heater again if the measured temperature is lower than the set temperature, otherwise leaving the heater as it is; And Control method of a gas analyzer comprising the step of displaying the temperature, humidity, and the data of the gas sensor measured outside. 7. The method according to claim 6, wherein after displaying the data, it is detected whether a stop command of gas analysis is input, and if the stop command is detected, the measured data is continuously received from the sensing unit, but otherwise the system Control method of a gas analyzer, characterized in that to initialize the. In the control method of the gas analyzer, When the gas analyzer is in calibration mode Determining whether it is initialization; Receiving air by driving a pump at an inlet side; Controlling on / off of at least one solenoid valve, respectively, for flowing said air to a heater; Driving a heater to heat the air to a constant temperature; Operating a pump at an inlet side and a pump at an outlet side to measure the gas sensor, temperature, and humidity by introducing air into the sensing unit; Receiving the measured data from the sensing unit; Determining whether the temperature measured by the sensing unit is lower than a set value; Operating the heater again if the measured temperature is lower than the set temperature, otherwise leaving the heater as it is; And Control method of a gas analyzer comprising the step of displaying the temperature, humidity, and the data of the gas sensor measured outside. 9. The method of claim 8, wherein after displaying the data, it is detected whether a stop command of gas analysis is input, and if a stop command is detected, the measured data is continuously received from the sensing unit, but otherwise the system Control method of a gas analyzer, characterized in that to initialize the. In the control method of the gas analyzer, When the gas analyzer is in the drying mode Receiving air by driving a pump at an inlet side; Controlling on / off of at least one solenoid valve, respectively, for flowing said air to a heater; Driving a heater to heat air to a predetermined temperature; And And operating the pump on the outlet side to discharge air to the outside. In the control method of the gas analyzer, When the gas analyzer is in communication mode with an external computer online Determining, by the external computer, whether to set the mode of the gas analyzer to be undecided, a schedule mode for analyzing a gas for a predetermined period, or a gas measuring mode; And According to the set mode of the gas analysis device, the control method of the gas analysis device, characterized in that for transmitting the measurement data between the gas analysis device and an external computer through a series of processes to store and analyze it in an external computer. The method of claim 11, wherein the external computer receives the data transmitted from the gas analyzer and analyzes the data when the mode of the gas analyzer is undefined. 12. The method of claim 11, wherein when the gas analyzer is set to the schedule mode, the external computer sets a schedule, transmits the set value to the gas analyzer, sets a schedule, and performs a gas measurement mode in the gas analyzer. And transmitting the measured data to an external computer, and storing and analyzing the data at an external computer. 12. The method of claim 11, wherein when the gas analyzer is set to the measurement mode, the external computer initializes and transmits the initialized data values to the gas analyzer to initialize the system. The method of controlling a gas analyzer, characterized in that the data is transmitted to an external computer, and the external computer stores and analyzes the data.