Gas Analysis Systems

Abstract

To grasp the remaining amount of standard gas without visiting an installation place of a standard gas cylinder while preventing cost increase.SOLUTION: A gas analysis system 100 includes: a gas analyzer 1 for verifying or calibrating a measurement system using standard gases enclosed in standard gas cylinders 130a-130f; solenoid valves 128a-128f for opening and closing the flow path of standard gas supplied from the standard gas cylinders 130a-130f; a standard gas flowmeter 129 for measuring the flow rate of the standard gas supplied from the standard gas cylinders 130a-130f; and a control unit for acquiring information about the standard gas of the standard gas cylinder based on at least one of the time when the flow path was opened by the solenoid valves 128a-128f or the flow rate acquired from the standard gas flowmeter 129, and the capacity of the standard gas cylinders 130a-130f in which the standard gas is enclosed.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a gas analysis system that uses a standard gas to verify or calibrate a measurement system. [Background technology]

[0002] In recent years, interest in global environmental conservation has been growing on an international scale. X Air pollution caused by CO2, CO, etc. is seen as a serious problem, and gas analyzers that measure these air pollutant components play an important role in protecting the global environment.

[0003] When measuring gas components in a gas analyzer, the sample gas to be analyzed is supplied to the measurement system, and the gas components of the sample gas are measured, but errors occur in the measurement results of the measurement system over time. Therefore, in order to validate and calibrate the measurement system that measures gas components, it is necessary to install a cylinder filled with standard gas and periodically measure the concentration of the standard gas to validate and calibrate the measurement system.

[0004] Patent Document 1 discloses a cylinder management system that manages multiple gas cylinders that supply cylinder gas (standard gas) to a gas analyzer. The cylinder management system in Patent Document 1 includes multiple pressure sensors that detect the pressure of each of the multiple gas cylinders, and a management device that calculates the remaining amount of each gas cylinder from the detected pressure of each pressure sensor. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6998269 Summary of the Invention [Problem to be solved by the invention]

[0006] Gas analyzers use up to five different standard gases depending on the type of gas component being measured. When the remaining standard gas runs low, the user must order a new standard gas cylinder, but depending on the type of standard gas, the lead time from order to delivery can be long. Delays in delivery can affect the regular intervals for verification and calibration, affecting the operation of the entire system, including the gas analyzer.

[0007] The user reads the value of the pressure sensor attached to the standard gas cylinder, checks the remaining amount of standard gas in the standard gas cylinder, and when the remaining amount of standard gas is low, orders a new standard gas cylinder. In other words, the user must go to the location where the standard gas cylinder is installed and read the value of the pressure sensor to check the remaining amount of standard gas.

[0008] In Patent Document 1, the pressure sensor value is output to the management device via a wired or wireless communication line, so the user does not need to go to the location where the standard gas cylinder is installed. However, in the system of Patent Document 1, a pressure sensor with communication capabilities must be installed for each standard gas cylinder, which leads to an increase in the cost of the entire system, including the gas analyzer.

[0009] Therefore, the present invention provides a gas analyzer that can determine the remaining amount of standard gas without having to go to the location where the standard gas cylinder is installed, while preventing an increase in costs. [Means for solving the problem]

[0010] The gas analysis system of the present invention comprises a gas analyzer that measures the concentration of one or more components contained in a sample gas and verifies or calibrates the measurement system using standard gases sealed in one or more standard gas cylinders; an opening and closing means that is arranged on the flow path of the standard gas supplied from the standard gas cylinder and opens and closes the flow path; a standard gas flow rate measuring means that measures the flow rate of the standard gas supplied from the standard gas cylinder; and a control means that is communicatively connected to the opening and closing means and the standard gas flow rate measuring means and controls the opening and closing of the flow path by the opening and closing means and acquires the flow rate of the standard gas measured by the standard gas flow rate measuring means, and the control means determines information about the standard gas in the standard gas cylinder based on at least one of the time that the flow path is opened by the opening and closing means or the flow rate acquired from the standard gas flow rate measuring means, and the capacity of the standard gas cylinder in which the standard gas is sealed. [Effects of the Invention]

[0011] According to the present invention, it is possible to know the remaining amount of standard gas without going to the location where the standard gas cylinder is installed, while preventing an increase in costs. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a schematic configuration diagram of a gas analysis system according to a first embodiment. [Figure 2] FIG. 2 is a hardware block diagram of a control unit of the gas analyzer of the first embodiment. [Figure 3] FIG. 2 is a hardware block diagram of a control device according to the first embodiment. [Figure 4] 10 is a flowchart for issuing a remaining amount alarm in the first embodiment. [Figure 5] FIG. 10 is a schematic configuration diagram of a gas analysis system according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] A gas analysis system according to an embodiment of the present invention will be described below with reference to the drawings.

[0014] Example 1 FIG. 1 is a schematic diagram of a gas analysis system. The gas analysis system 100 includes a gas analyzer 1 that measures the concentrations of one or more components (five components in Example 1) contained in a sample gas, and a control device 2 that is communicatively connected to the gas analyzer 1 via a communication line 3. The gas analyzer 1 experiences fluctuations in measured values due to factors over time. Therefore, the gas analyzer 1 performs validation using a standard gas to verify the validity of the concentration of the sample gas measured by the measurement system of the gas analyzer 1. The gas analyzer 1 also calibrates the measurement system to correct bias in the measured values of the measurement system of the gas analyzer 1. Although the gas analyzer 1 of Example 1 measures the concentrations of multiple components, the gas analyzer 1 may also measure the concentration of a single component.

[0015] (Gas analyzer 1) The gas analyzer 1 includes a gas inlet 110 that introduces a gas (hereinafter referred to as sample gas) or air to be measured, a sampling module 120 that conditions the sample gas or air introduced by the gas inlet 110 and supplies it to a downstream analyzing section 140, a plurality of standard gas cylinders 130a to 130f that are used for verifying and calibrating (zero calibration, span calibration) the analyzing section 140, the analyzing section 140 that measures the concentration of the sample gas, and a zirconia oxygen concentration meter 150. The measurement target of the gas analyzer 1 may be gas passing through the flue of a waste incineration facility or exhaust gas from a ship or vehicle, but is not limited to these. The gas analyzer 1 of Example 1 is capable of measuring SO2, NO X It is possible to measure five components: CO2, CO, and O2, but the components to be measured are not limited to these.

[0016] (Gas introduction section 110) The gas introduction unit 110 introduces sample gas and air into the gas analyzer 1. The gas introduction unit 110 includes a sample gas introduction port 111, which introduces sample gas collected by a gas collector (not shown), into the gas analyzer 1, a gas conditioner 112, a three-way solenoid valve 113, and a pump 114. The gas introduction unit 110 also includes an air intake port 115, which draws air into the gas analyzer 1, a filter 116, and a pump 117. The gas conditioner 112 removes drain, dust, and mist from the sample gas and adjusts the pressure of the sample gas. The three-way solenoid valve 113 electronically opens and closes a flow path, and opens the flow path to connect the gas conditioner 112 and the pump 114. The three-way solenoid valve 113 can also connect the atmosphere to the pump 114. The pump 114 is a pump for sucking the sample gas, and the pump 117 is a pump for sucking the air.

[0017] Sample gas collected by a gas collector (not shown) is introduced into the sampling module 120 via a sample gas inlet 111, a gas conditioner 112, a three-way electromagnetic valve 113, and a pump 114. Air drawn in through an air inlet 115 is introduced into the sampling module 120 via a filter 116 and a pump 117.

[0018] (Sampling Module 120) The sampling module 120 includes a needle valve 121, an electronic dehumidifier 122, an SO3 mist catcher 123, an NO2 / NO converter 124, a comparison gas purifier 125, multiple (three in Example 1) membrane filters 126a to 126c, multiple (three in Example 1) flow meters 127a to 127c, multiple (six in Example 1) solenoid valves 128a to 128f, and a standard gas flow meter 129.

[0019] The needle valve 121 is a flow regulator for maintaining a constant flow rate of the sample gas. The electronic dehumidifier 122 removes moisture from the sample gas and air introduced into the sampling module 120. The SO3 mist catcher 123 removes sulfuric acid mist from the sample gas. The NO2 / NO converter 124 converts NO2 gas to NO. The reference gas purifier 125 purifies the reference gas from the drawn air. The membrane filter 126a is disposed in the reference gas flow path and removes fine dust from the reference gas. The membrane filters 126b and 126c are disposed in the sample gas flow path and remove fine dust from the sample gas. The flow meter 127a measures the flow rate of the reference gas, and the flow meters 127b and 127c measure the flow rate of the sample gas. Multiple solenoid valves 128a to 128f are provided corresponding to the multiple standard gas cylinders 130a to 130f, respectively. The plurality of solenoid valves 128a to 128f are used to introduce the standard gases in the plurality of standard gas cylinders 130a to 130f into the analysis section 140. Each of the plurality of solenoid valves 128a to 128f is disposed on a flow path connected to the standard gas cylinders 130a to 130f, and opens and closes the flow path by electronic control.

[0020] The standard gas flow meter 129 is disposed downstream of the solenoid valves 128a to 128f on a flow path where a plurality of flow paths connected to a plurality of standard gas cylinders 130a to 130f join together. The standard gas flow meter 129 measures the flow rate of the standard gas in the joined flow path. The standard gas flow meter 129 has a communication function, and the flow rate measured by the standard gas flow meter 129 is transmitted to the control unit 200, which will be described later.

[0021] The sample gas supplied from the gas inlet 110 is supplied to the analyzing section 140 via the electronic dehumidifier 122, the SO3 mist catcher 123, the NO2 / NO converter 124, the membrane filter 126b, and the flow meter 127b. The sample gas is also branched at a stage subsequent to the electronic dehumidifier 122 and supplied to the zirconia oxygen analyzer 150 via the membrane filter 126c and the flow meter 127c. The air supplied from the gas inlet 110 is also supplied to the analyzing section 140 as the reference gas via the electronic dehumidifier 122, the reference gas purifier 125, the membrane filter 126a, and the flow meter 127a.

[0022] (Standard gas cylinder 130a~130f) The standard gas cylinders 130a to 130f are filled with standard gases used for verifying and calibrating (zero calibration, span calibration) the infrared analyzers 143 and 144 (described later) of the analysis unit 140. Zero calibration adjusts the zero point. The standard gas cylinder (Air) 130a is used for zero calibration. Span calibration adjusts the span point. Span calibration uses standard gas cylinders (NO / N2, SO2 / N2, CO2 / N2, CO / N2, O2 / N2) 130b to 130f, each filled with a gas component (NO, SO2, CO2, CO, O2) at a predetermined concentration or higher. The standard gases filled in the standard gas cylinders 130a to 130f are used not only for the calibration described above but also for verifying the analysis unit 140. The standard gases sealed in the standard gas cylinders 130 a to 130 f are supplied to an analyzing section 140 and a zirconia oxygen concentration meter 150 via electromagnetic valves 128 a to 128 f and a standard gas flow meter 129 .

[0023] Each of the standard gas cylinders 130a to 130f is provided with a pressure gauge, but these pressure gauges do not have a communication function. Therefore, a user must visit the installation locations of the standard gas cylinders 130a to 130f to check the measurements of the pressure gauges. As will be described later, in the first embodiment, it is possible to predict the remaining amount of standard gas in the standard gas cylinders 130a to 130f, so that a user can know the remaining amount of standard gas in the standard gas cylinders 130a to 130f without visiting the installation locations of the standard gas cylinders 130a to 130f.

[0024] (Analysis Department 140) The analysis unit 140 has three-way solenoid valves 141 and 142, and infrared analyzers 143 and 144. The three-way solenoid valve 141 switches the output destination of the reference gas, supplying the reference gas to the infrared analyzer 143 or to the infrared analyzer 144. The three-way solenoid valve 142 also switches the output destination of the sample gas, supplying the sample gas to the infrared analyzer 143 or to the infrared analyzer 144. The infrared analyzers 143 and 144 measure the gas components by non-dispersive infrared absorption. The method for measuring the concentrations of the gas components is not limited to non-dispersive infrared absorption, and may be, for example, gas chromatography. The infrared analyzer 143 measures the concentrations of SO2, CO, and CO2, and the infrared analyzer 144 measures the concentrations of NO2, CO3, and CO2. X Measure the concentration of.

[0025] (Zirconia oxygen concentration meter 150) The zirconia oxygen concentration meter 150 measures the oxygen concentration in the sample gas. The method for measuring the oxygen concentration is not limited to the zirconia type, and may be, for example, a magnetic type.

[0026] (control unit 200) Fig. 2 is a hardware block diagram of a control unit of the gas analyzer. The gas analyzer 1 has a control unit 200 that controls each unit of the gas analyzer 1. The hardware configuration of the control unit 200 of the gas analyzer 1 will be described with reference to Fig. 2. The control unit 200 has a processor 201, a main memory unit 202, an auxiliary memory unit 203, an input / output interface (hereinafter, interface will be abbreviated as I / F) 204, a communication I / F 205, and a bus 206 that communicatively connects the above-mentioned modules.

[0027] The processor 201 is a central processing unit that controls the operation of each unit of the control unit 200. The processor 201 is, for example, a central processing unit (CPU), a digital signal processor (DSP), or an application specific integrated circuit (ASIC). The processor 201 deploys a program stored in the auxiliary storage unit 203 in an executable manner in a working area of the main storage unit 202 and executes the program. The main storage unit 202 stores the program executed by the processor 201, data processed by the processor, etc. The main storage unit 202 is, for example, a flash memory, a random access memory (RAM), etc. The auxiliary storage unit 203 is, for example, a read only memory (ROM), a solid state drive (SSD), a hard disk drive (HDD), etc.

[0028] The input / output I / F 204 is communicatively connected to an input unit 210 having a touch sensor, various buttons, etc., and a display unit 220 that displays measurement results, setting screens, etc. The input / output I / F 204 is also communicatively connected to solenoid valves 128a to 128f that start and stop the supply of standard gas sealed in the standard gas cylinders 130a to 130f. The input / output I / F 204 is also communicatively connected to a standard gas flow meter 129 that measures the flow rate of the standard gas. The control unit 200 turns on or off the solenoid valves 128a to 128f to open or close the flow path of the standard gas, thereby starting and stopping the supply of the standard gas. The control unit 200 also acquires the flow rate of the standard gas from the standard gas flow meter 129.

[0029] The communication I / F 205 communicates with the control device 2 via the communication line 3. The communication I / F 205 is connected to the control device 2 so that communication is possible via wire or wirelessly. The communication I / F 205 transmits to the control device 2 information such as the amount of standard gas used, the remaining amount of standard gas, an alarm indicating that the remaining amount of standard gas is low, the remaining number of verifications or calibrations, and the timing for ordering a standard gas cylinder, which will be described later.

[0030] The control unit 200 calculates the amount of standard gas used based on at least one of the on-time of the solenoid valves 128a to 128f and the flow rate of the standard gas obtained from the standard gas flow meter 129. For example, the control unit 200 calculates the amount of standard gas used based on the on-time of the solenoid valves 128a to 128f and the opening degree of the solenoid valves 128a to 128f. The control unit 200 also determines the flow rate of the standard gas obtained from the standard gas flow meter 129 as the amount of standard gas used. The control unit 200 then calculates the remaining amount of standard gas based on the total amount of standard gas used and the capacity of the standard gas cylinder, and issues an alarm if the remaining amount of standard gas is less than a threshold. The control unit 200 also calculates the remaining number of verifications or calibrations that can be performed using the standard gas in the standard gas cylinder based on the calculated remaining amount of standard gas and the amount of standard gas used per verification or calibration. The control unit 200 also calculates the time to order a standard gas cylinder based on the calculated remaining amount of standard gas and the timing of verification or calibration using standard gas.

[0031] (Control device 2) The control device 2 is a computer installed in an operator's room, and is connected to the gas analyzer 1 so as to be able to communicate with it.

[0032] FIG. 3 is a hardware block diagram of the control device. The hardware configuration of the control device 2 will be described with reference to FIG. 3. The control device 2 includes a control unit 300, a display unit 310, and an input unit 320. Description overlapping with the hardware configuration of the control unit 200 in the gas analyzer 1 shown in FIG. 2 will be omitted as appropriate. The control unit 300 includes a processor 301, a main memory unit 302, an auxiliary memory unit 303, an input / output I / F 304, a communication I / F 305, and a bus 306. The communication I / F 305 communicates with the gas analyzer 1 via the communication line 3. The communication I / F 305 receives, from the gas analyzer 1, the amount of standard gas used, the remaining amount of standard gas, an alarm indicating that the remaining amount of standard gas is low, the remaining number of verifications or calibrations that can be performed with the standard gas in the standard gas cylinder, the timing of ordering a standard gas cylinder, and the like.

[0033] The display unit 310 displays information about the standard gas in the standard gas cylinder, such as the amount of standard gas used, the remaining amount of standard gas, an alarm indicating that the remaining amount of standard gas is low, the remaining number of verifications or calibrations that can be performed on the standard gas in the standard gas cylinder, and the timing of ordering a new standard gas cylinder.

[0034] The input unit 320 is a keyboard, a mouse, or the like, and the user uses the input unit 320 to input the capacity of each of the standard gas cylinders 130a to 130f, a threshold value to be compared with the remaining amount of standard gas, the amount of standard gas used per verification or calibration, and the timing of verification or calibration. The amount of standard gas used per verification or calibration may be a fixed value, or the amount of standard gas used per verification or calibration may be calculated or corrected using the measurement value of the standard gas flow meter 129.

[0035] (Alarm regarding remaining standard gas) Fig. 4 is a flowchart for issuing an alarm indicating that the remaining amount of standard gas is low (hereinafter referred to as a remaining amount alarm). A method for issuing a remaining amount alarm will be described with reference to Fig. 4. Each step of the flowchart in Fig. 4 is executed by the control unit 200 of the gas analyzer 1.

[0036] When it is time to perform verification or calibration (step S401), the control unit 200 turns on the solenoid valves 128a to 128f provided corresponding to the standard gas cylinders 130a to 130f (step S402) to open the standard gas flow path. This allows the standard gas in the standard gas cylinders 130a to 130f to be introduced into the analysis unit 140. Verification or calibration is performed at a timing specified by the user or at a preset timing (for example, every N days or every N hours (N is a natural number)). Verification or calibration may be performed for all components at once, or for each component individually.

[0037] Next, the control unit 200 acquires the on-time of the solenoid valves 128a-128f in the current verification or calibration and the flow rate measured by the standard gas flow meter 129 (step S403). The control unit 200 calculates the amount of standard gas used based on the on-time and flow rate acquired in step S403. Then, the control unit 200 calculates the remaining amount of standard gas based on the sum of the amount of standard gas used calculated in the previous verification or calibration and the amount of standard gas used in the current verification or calibration, and the capacity of the standard gas cylinders 130a-130f. The control unit 200 then determines whether the calculated remaining amount of standard gas is smaller than a threshold value (step S404), and if the calculated remaining amount of standard gas is smaller than the threshold value (step S404: Yes), issues a remaining amount alarm (step S405).

[0038] In addition to the remaining amount alarm, the control unit 200 also calculates the remaining number of verifications or calibrations and the time to order a standard gas cylinder. The control unit 200 transmits the amount of standard gas used, the remaining amount of standard gas, the remaining amount alarm, the remaining number of verifications or calibrations, the time to order a standard gas cylinder, and the like to the control device 2 via the communication I / F 205. The control device 2 receives the amount of standard gas used, the remaining amount of standard gas, the remaining amount alarm, the remaining number of verifications or calibrations, and the time to order a standard gas cylinder from the control unit 200 and displays them on the display unit 310. The display unit 310 does not need to be able to display all of the received amount of standard gas used, the remaining amount of standard gas, the remaining amount alarm, the remaining number of verifications or calibrations, and the time to order a standard gas cylinder; it is sufficient if it can display at least one of the amount of standard gas used, the remaining amount alarm, the remaining number of verifications or calibrations, and the time to order a standard gas cylinder.

[0039] (Effects of Example 1) The control unit 200 calculates the remaining amount of standard gas in the standard gas cylinders 130a-130f based on the time (ON time) that the solenoid valves 128a-128f open the flow paths, the flow rate obtained from the standard gas flowmeter 129, and the capacity of the standard gas cylinders 130a-130f in which the standard gas is sealed. The user can know the remaining amount (estimated value) of standard gas in the standard gas cylinders 130a-130f without providing a pressure gauge with a communication function in the standard gas cylinders 130a-130f. Therefore, by using the gas analysis system 100 of the first embodiment, it is possible to grasp the remaining amount of standard gas while preventing an increase in costs. Furthermore, by grasping the remaining amount of standard gas, it is possible to order the standard gas cylinders 130a-130f at an appropriate time. As a result, it is possible to prevent system shutdowns due to a shortage of standard gas cylinders 130a-130f, enabling efficient and reliable system operation.

[0040] The remaining amount of standard gas is displayed on the display unit 310 of the control device 2, so the user can know the remaining amount of standard gas in the operator's room without going to the installation locations of the standard gas cylinders 130a to 130f.

[0041] The control unit 200 calculates the remaining number of verifications or calibrations that can be performed with the standard gas in the standard gas cylinder based on the remaining amount of standard gas and the amount of standard gas used per verification or calibration. This allows the user to easily grasp the remaining number of verifications or calibrations that can be performed with the standard gas in the standard gas cylinders 130a to 130f.

[0042] By setting the amount of standard gas used per time to a fixed value, the remaining number of verifications or calibrations can be calculated by a simple calculation. In addition, by calculating or correcting the amount of standard gas used per time based on the flow rate of the standard gas measured by the standard gas flow meter 129, the remaining number of verifications or calibrations can be calculated accurately.

[0043] Furthermore, the control unit 200 calculates the timing for ordering the standard gas cylinders 130a-130f based on the remaining amount of standard gas and the timing for performing verification or calibration, thereby allowing the user to easily know when to order the standard gas cylinders 130a-130f.

[0044] By placing the standard gas flow meter 129 downstream of the solenoid valves 128a to 128f on a flow path where multiple flow paths connected to multiple standard gas cylinders 130a to 130f converge, it is possible to measure the flow rate of the standard gas of each component with a single flow meter.

[0045] <Example 2> The standard gas flow meter 129 of the gas analyzer 1 of the first embodiment is disposed on a flow path where a plurality of flow paths connected to a plurality of standard gas cylinders 130a to 130f join together. Each of the standard gas flow meters 529a to 529f of the second embodiment is disposed on a plurality of flow paths connected to a plurality of standard gas cylinders 130a to 130f. Each of the standard gas flow meters 529a to 529f has a communication function, and the flow rate measured by each of the standard gas flow meters 529a to 529f is transmitted to the control unit 200.

[0046] (Effects of Example 2) Since the standard gas flow meters 529a to 529f are provided for the standard gas cylinders 130a to 130f, respectively, it is possible to measure the flow rate of the standard gas accurately for each component.

[0047] Although the present invention has been described above with reference to the embodiments, the above embodiments are merely illustrative of specific examples of how the present invention can be implemented, and the technical scope of the present invention should not be construed as being limited by these embodiments. In other words, the present invention can be implemented in various forms without departing from its technical concept or main features.

[0048] For example, in the first embodiment, the control unit 200 of the gas analyzer 1 calculates the amount of standard gas used, the remaining amount of standard gas, the remaining number of verifications or calibrations, and the time to order a standard gas cylinder, and issues a remaining amount alarm. Here, the amount of standard gas used, the remaining amount of standard gas, the remaining number of verifications or calibrations, the time to order a standard gas cylinder, and the remaining amount alarm are referred to as information related to the standard gas. At least one of the information related to the standard gas may be calculated / issued by the control unit 300 of the control device 2. Furthermore, the calculation / issuance of the information related to the standard gas may be shared between the control unit 200 of the gas analyzer 1 and the control unit 300 of the control device 2. When the control unit 300 of the control device 2 calculates / issues the information related to the standard gas, the control unit 200 needs to transmit information necessary for calculating / issuing the information related to the standard gas (e.g., the on-time of the solenoid valves 128a to 128f and the flow rate of the standard gas obtained from the standard gas flow meter 129) to the control unit 300.

[0049] The control unit 200 or 300 may also be connected to a purchasing system that places orders for the standard gas cylinders 130a-130f. This allows for accurate prediction of the order timing based on the delivery date of the standard gas cylinders 130a-130f, the remaining amount of standard gas, and the remaining number of verifications or calibrations. Furthermore, by connecting to the purchasing system, a system can be established for automatically ordering standard gas cylinders 130a-130f with low remaining amounts. As a result, an efficient and reliable system can be operated for a long period of time.

[0050] Furthermore, in the first embodiment, information about the standard gas is displayed on the display unit 310 of the control device 2, but information about the standard gas may be displayed on the display unit 220 of the gas analyzer 1. [Explanation of symbols]

[0051] 1: gas analyzer, 2: control device, 100: gas analysis system, 128a to 128f: solenoid valves (opening / closing means), 129: standard gas flow meter (standard gas flow rate measuring means), 130a to 130f: standard gas cylinder, 200: control unit (control means), 300: control unit (control means)

Claims

1. a gas analyzer that measures the concentration of one or more components contained in a sample gas and verifies or calibrates a measurement system using standard gases sealed in one or more standard gas cylinders; an opening / closing means disposed on a flow path of the standard gas supplied from the standard gas cylinder, for opening and closing the flow path; a standard gas flow rate measuring means for measuring the flow rate of the standard gas supplied from the standard gas cylinder; a control means that is communicatively connected to the opening and closing means and the standard gas flow rate measurement means, controls the opening and closing of the flow path by the opening and closing means, and acquires the flow rate of the standard gas measured by the standard gas flow rate measurement means, the control means determines information about the standard gas in the standard gas cylinder based on the time the flow path is opened by the opening / closing means, the flow rate obtained from the standard gas flow rate measurement means, and the volume of the standard gas cylinder in which the standard gas is sealed; The remaining number of times of verification or calibration is a value calculated based on the amount of standard gas used per time of use, The amount of standard gas used per use is a fixed value or a value calculated based on the flow rate of the standard gas measured by the standard gas flow rate measuring means. A gas analysis system comprising:

2. a gas analyzer that measures the concentration of one or more components contained in a sample gas and verifies or calibrates a measurement system using standard gases sealed in one or more standard gas cylinders; an opening / closing means disposed on a flow path of the standard gas supplied from the standard gas cylinder, for opening and closing the flow path; a standard gas flow rate measuring means for measuring the flow rate of the standard gas supplied from the standard gas cylinder; a control means that is communicatively connected to the opening and closing means and the standard gas flow rate measurement means, controls the opening and closing of the flow path by the opening and closing means, and acquires the flow rate of the standard gas measured by the standard gas flow rate measurement means, the control means determines information about the standard gas in the standard gas cylinder based on the time the flow path is opened by the opening / closing means, the flow rate obtained from the standard gas flow rate measurement means, and the volume of the standard gas cylinder in which the standard gas is sealed; The standard gas flow rate measuring means is disposed downstream of the opening and closing means on a flow path where a plurality of flow paths connected to a plurality of the standard gas cylinders join together. A gas analysis system comprising:

3. The apparatus further includes a display means for displaying information about the standard gas in the standard gas cylinder obtained by the control means.

3. The gas analysis system according to claim 1 or 2.

4. The information about the standard gas in the standard gas cylinder obtained by the control means includes at least one of the remaining amount of the standard gas in the standard gas cylinder, the remaining number of times the verification or calibration can be performed with the standard gas in the standard gas cylinder, the time to order the standard gas cylinder, or an alarm indicating that the remaining amount of the standard gas is low.

4. The gas analysis system according to claim 1, wherein the gas analysis system comprises: a first detecting means for detecting a first voltage;

5. The system further includes a purchasing system that orders the standard gas cylinders according to the order timing.

5. The gas analysis system according to claim 4.

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