gas detectorIt is a gas leakage concentration detection instrument, which is mainly divided into portable, handheld, fixed and online according to the mode of usegas detector。 The gas sensor isgas detectorimportant part of the The life of a gas detector refers to the life of the gas sensor. The main types of gas sensors are electrochemical sensors, catalytic combustion sensors, semiconductor sensors, infrared sensors, etc., if you want to know the service life of the gas detector, you can click to draw a horizontal line to view the service life of the flammable gas leak detector, and share the precautions for how to use it. So what is the alarm value standard for gas detector? What are the factors that affect the alarm value? Let us take you to find out, I hope it will be helpful to you.
Low concentration alarm value: When the meter detects that the gas concentration is lower than the set value, the instrument will emit both sound, light and vibration alarms. The alarm value and alarm type can be set by the user.
High concentration alarm value: When the meter detects that the gas concentration is lower than the set value, the instrument emits both audible, visual and vibration alarms. The alarm value and alarm type can be set by the user.
TWA alarm value: The instrument records the measurement data every 10 minutes, recording 48 data, that is, the data within 8 hours. When the average value of 48 data is higher than the TWA alarm value, the instrument will issue an audible and visual alarm at the same time. The alarm value and alarm type can be set by the user.
Alarm value: The instrument records the measurement data every once in a while, recording 15 data, that is, the data within 15 minutes. When the average of these 15 data is higher than the set value of the S alarm value, the instrument will issue an audible and visual alarm at the same time. The alarm value and alarm type can be set by the user.
gas detector
Factors that affect the alarm value of the gas detector
Influencing factors 1. Temperature and humidity
Changes in temperature and humidity can affect the detection results of the gas detector. If the temperature fluctuates greatly, the test results will drift and need to be zeroed on site. Excessive humidity will slowly affect the oxygen reading, and the oxygen reading will cause a drop, so it is usedgas detectorBe sure to pay attention to the use environment.
Second, detect gas concentrations that are too high
Prolonged usegas detectorIn a high concentration environment, it will cause damage to the detector, each gas detector has a fixed detection range, the detector measures within the measurement range, and the measured number is accurate.
Influencing factor 3. The importance of zeroing
After using the gas detector, check whether the detector has been zeroed. When resetting to zero, ensure that the surrounding environment is clean and the accuracy of the data is guaranteed.
gas detector alarm value standard
Influencing factors 4. Regular calibration and testing
Gas concentration values are determined by relative comparison. Before detecting the concentration of the measured gas, you need to calibrate the instrument with zero gas and standard concentration gas, and compare the electrical signal generated by the measured gas concentration with the electrical signal generated by the standard concentration.
5.、Gas sensor
gas detectorGas sensorCan be replaced. When replacing the sensor, a certain amount of sensor activation time is required and the gas detector needs to be recalibrated. To better protect the gas sensor, the response of the standard gas used in the detector must be detected before use.