Exhaust gas measurement device and program for exhaust gas measurement device

Abstract

The invention provides an exhaust gas measurement device and a program for an exhaust gas measurement device. Before a pressure control by a pressure regulator becomes impossible and exhaust gas cannot be continuously measured, in order for a user to be able to expect a time of occurrence of such a malfunction so that the user can perform maintenance of such as a filter and a pump before the measurement becomes completely impossible and interruption of the measurement during the measuring operation can be prevented, an exhaust gas measurement device includes: a pressure regulator 331 for keeping a pressure of sample gas in a sensor flow line 32 or a bypass flow line 33 to be a set pressure value; a flow rate sensor 332 provided on the bypass flow line 33 for measuring a flow rate of the sample gas flowing through the bypass flow line; and an attention attracting part 41 for displaying that the flow rate of the sample gas is reduced in the case where the flow rate measurement value measured by the flow rate sensor 332 becomes equal to or smaller than an attention attracting flow rate value larger than a pressure controlling limit flow rate value by a predetermined value, the pressure controlling limit flow rate value being a lower limit flow rate value that is pressure-controllable by the pressure regulator 331.

Description

technical field [0001] The present invention relates to an exhaust gas measuring device for analyzing components contained in exhaust gas exhausted from an engine, etc., and a display method for the exhaust gas measuring device used in the exhaust gas measuring device. Background technique [0002] As such an exhaust gas measurement device, carbon monoxide (CO), total hydrocarbons (THC), nitrogen oxides (NO X ), carbon dioxide (CO 2 ) etc. (refer to Patent Document 1 (Japanese Patent Laid-Open Publication No. 2003-149099)). [0003] Specifically, the above-mentioned exhaust gas measuring device such as Figure 4 As shown, in the exhaust gas measurement device 3, two flow channels are branched from the introduction flow channel 31 that introduces the sample gas containing exhaust gas, and one flow channel is used as the sensor flow channel 32, which is provided for measuring each A plurality of gas analyzers 322 for one component, and the other flow path is used as a bypass...

AI Technical Summary

Problems solved by technology

[0006] However, this exhaust gas measuring device notifies the user of the abnormality of the exhaust gas measuring device only when the filter is clogged so that the exhaust gas measurement cannot be continued at all, or the capacity of the pump is reduced.

In other words, the user is notified of an abnormality in the device only when a serious problem such as being unable to continue the measurement of the exhaust gas occurs, so the user cannot grasp the time when the measurement cannot be performed in advance, and sometimes has to stop the measurement in the middle of the measurement of the exhaust gas.

In this way, the measurement data interrupted in the middle of the exhaust gas measurement has to be discarded due to the continuity of the measurement conditions, etc., so that the exhaust gas measurement that has been carried out becomes invalid.

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