(1) attention to regular calibration and detection
有毒有害气体检测仪也同其它的分析检测仪器一样 ,都是用相对比较的方法进行测定的 :先用一个零气体和一个标准浓度的气体对仪器进行标定 ,得到标准曲线储存于仪器之中 ,测定时 ,仪器将待测气体浓度产生的电信号同标准浓度的电信号进行比较 ,计算得到准确的气体浓度值。因此 ,随时对仪器进行校零 ,经常性对仪器进行校准都是保证仪器测量准确的必不可少的工作。需要说明的是 :目前很多气体检测仪都是可以更换检测传感器的 ,但是 ,这并不意味着一个检测仪可以随时配用不同的检测仪探头。不论何时 ,在更换探头时除了需要一定的传感器活化时间外 ,还必须对仪器进行重新校准。另外 ,建议在各类仪器使用之前 ,对仪器用标气进行响应检测 ,以保证仪器准确有效。
Toxic and harmful gas detector with other analytical instruments, are determined by the comparative method: after the instrument was calibrated using a zero gas gas and a standard concentration of the standard curve is obtained and stored in the instrument, measurement, electrical instruments will be tested gas concentrations produced the signal with the standard concentration were compared, calculated the exact value of the gas concentration. Therefore, the calibration of the instrument at any time and the regular calibration of the instrument are essential to ensure the accuracy of the instrument. What needs to be explained is that many gas detectors are able to replace detection sensors at present. However, this does not mean that a detector can be equipped with different detectors at any time. Whenever the probe is replaced, it is necessary to recalibrate the instrument in addition to the necessary time for the activation of the sensor. In addition, it is suggested that before the use of all kinds of instruments, the instrument can be tested with the standard gas in response to ensure the accuracy and effectiveness of the instrument.
2. Attention to detection interference between different sensors
一般而言 ,每种传感器都对应一个特定的检测气体 ,但任何一种传感器都不是对的。因此 ,在选择一种气体传感器时 ,都应当尽可能了解其它气体对该传感器的检测干扰 ,以保证它对于特定气体的准确检测。
In general, each sensor corresponds to a specific detection gas, but any one of the sensors is not absolutely specific. Therefore, when selecting a gas sensor, we should understand the interference of other gases to the sensor as far as possible, so as to ensure its accurate detection for specific gases.
Pay attention to the life of all kinds of sensors
各类气体传感器都具有一定的使用年限 ,即寿命。一般来讲 ,在便携式仪器中 ,可燃气传感器的寿命较长 ,一般可以使用三年左右 ;光离子化检测仪的寿命为四年或更长一些 ;电化学特定气体传感器的寿命相对短一些 ,一般在一年到两年 ;氧气传感器的寿命比较短 ,大概在一年左右(电化学传感器的寿命取决于其中电解液的干涸 ,所以如果长时间不用 ,将其密封放在较低温度的环境中可以延长一定的使用寿命) 。固定式仪器由于体积相对较大 ,传感器的寿命也较长一些。因此 ,要尽可能在传感器的有效期内使用 ,一旦失效 ,及时更换。
All kinds of gas sensors have a certain service life, that is, life. Generally speaking, the portable instrument, a long life of gas sensors, can generally be used for about three years; photoionization detector for a lifetime of four years or longer; specific electrochemical gas sensor life is relatively short, usually in one to two years; the oxygen sensor has the shortest life, probably in about a year (life depends on the electrochemical sensor in which the electrolyte dries up, so if not used for a long time, the sealing in low temperature environment can prolong the service life of certain). Because of the relatively large volume of the fixed instrument, the life of the sensor is longer. Therefore, it should be used as much as possible in the validity period of the sensor, and if it fails, it should be replaced in time.
(4) pay attention to the measuring range of the concentration of the instrument
各类有毒有害气体检测器都有其固定的检测范围。只有在其测定范围内完成测量 ,才能保证仪器准确地进行测定。而长时间超出测定范围进行测量 ,就可能对传感器造成性的破坏。
All kinds of toxic and harmful gas detectors have their fixed detection range. The accurate measurement of the instrument can be ensured only if the measurement is completed within the range of its measurement. It is possible to cause permanent damage to the sensor by measuring the range beyond the measurement for a long time.
比如 , 可燃气体检测仪器 , 如果不慎在超过100 %LEL 的环境中使用 ,就有可能彻底烧毁传感器。而有毒气体检测器 ,长时间工作在较高浓度下使用也会造成损坏。所以 ,固定式仪器在使用时如果发出超限信号 ,要立即关闭测量电路 ,以保证传感器的安全。总之 ,有毒有害气体检测仪是保证工业安全和工作人员健康的有力工具。我们要根据具体的使用环境场合以及需要的功能 ,选择合适的气体检测仪。目前 ,可供我们选择的检测仪包括固定式/便携式、扩散式/泵吸式、单气体/多气体、无机气体/有机气体等多种多样的组合。只有选择好了合适的气体检测仪器 ,才能真正做到事半功倍，防范于未然。
For example, a flammable gas detector, if used inadvertently in an environment exceeding 100%LEL, could completely burn up the sensor. And the toxic gas detector, for a long time working at a higher concentration, can also cause damage. In order to ensure the safety of the sensor, the measuring circuit should be shut down immediately when the fixed instrument is used. In a word, the toxic and harmful gas detector is a powerful tool to ensure the safety of industry and the health of the workers. We should choose the appropriate gas detector according to the specific environment and the functions needed. At present, the detectors we can choose include fixed / portable, diffuser / pump suction, single gas / multi gas, inorganic gas / organic gas and so on. Only by choosing the right instrument of gas detection can we get twice the result with half the effort and prevent it.