Do you know how to use gas detector?
With the development of industries,gas detector can be used normally,do you know how to correctly use it? Let us see one by one.
First，when you get a new toxic gas detector, you must read the instruction manual carefully and install based on the instructions. Do not press it without understanding the meaning of the operation menu and modify the internal data. When facing the required function and don't know how to operate, please pay attention to the operation process of this function in the instruction manual.
Second,daily maintenance and maintenance need to pay attention, because many toxic gas detectors use sensors based on electrochemical principles and have a fixed amount of drift every month. Therefore, a calibration plan needs to be formulated and calibrated on time.
Calibration equipment needs to be used in accordance with specified requirements, such as standard gas in calibration equipment. The use of standard gas must be safe, the flow and pressure must be controlled and adjusted. After the detector is used, the sensor needs to be restored in a clean air environment, especially the detector absorbed by the pump. After measuring the toxic gas, you should pump more clean air to replace the gas path of the gas detector and the sensor air chamber. Turn off after 2-3 minutes of full replacement. The purpose of this is also to protect the service life of the gas path and sensors inside the detector.
Third,the toxic gas detector is divided into portable and fixed types. The use of portable toxic gas detectors is relatively simple, but the use of fixed toxic gas detectors also involves installation location and circuit wiring issues.
The installation position needs to determine the height according to the specific gravity of the gas. This specific gravity problem mainly means that the specific gravity of the gas we are testing is compared with the air. For those that are heavier than air, we must install a distance of 30-60 cm from the ground. It should be installed above the leak point or the highest position in the room. If it is close to the specific gravity of the air, look at the location of the leak source parallel to it or choose the height of the human breath to install. For another problem circuit wiring needs to pay attention to the positive and negative poles of the power supply. The power supply needs to use DC24V DC power supply, and the line uses 3 core 1.5 square meters mm shielded wire.
Fourth,the service life of the toxic gas detector should be replaced as soon as it expires. The sensor life of a toxic gas detector according to the standard general electrochemical principle is two years.
Fifth,when using a toxic gas detector, pay attention to whether the measuring range of the machine is appropriate. If the concentration of the gas to be measured exceeds the maximum range of the sensor, working in this environment for a long time will damage the sensor, and there will be no response or zero drift in the measurement.
Sixth,whether the environmental conditions used are suitable, whether the temperature and pressure are allowed, and the toxic gas detector under normal circumstances is only suitable for the general temperature range of -20 to 50 degrees, and the humidity is 95% without condensation, otherwise it will cause damage to the sensor, so When using it, you must see if the working environment is suitable. If it is not suitable, you need to install a gas pretreatment system.
Seventh,when using a toxic gas detector, do not throw it away or shake the gas detector arbitrarily, because the sensor inside the detector has electrolyte substance, shaking it vigorously will cause the electrolyte to shake, resulting in inaccurate data in the detection process or causing the zero point to drift too much Therefore, avoid vigorous shaking or installation on vibrating equipment.
Eighth,the toxic gas detector is a high-precision instrument, so try to avoid the electromagnetic interference area from affecting the stability of the instrument during use.
Ninth,Does the toxic gas detector use oxygen in the environment? Because most toxic gas detectors are based on electrochemical principles, oxygen must be involved in order for the sensors of the instrument to work properly. Therefore, the environment for measuring toxic gases must have oxygen. Existence, otherwise it will not be able to measure correctly for a long time, which will cause the instrument to fail to measure data. This situation is the reason of working conditions, and it is not a malfunction of the instrument, so you need to pay attention.
Tenth,to use a toxic gas detector, we need to know whether the detector has cross-interference gas. This is mainly to say that there is no other gas that will produce data on this detector. When using it, it must be clear whether the instrument has other gases that cross-interference. .
In order to eliminate cross-interference, we must determine whether there are types of cross-interference gas in the test environment, otherwise we will not know whether the data measured by the instrument is the accurate target gas concentration, which will lead to our misjudgment and may cause Cause a major accident.
Ten points about the use of toxic gas detectors must be kept in mind, will it cause loss to the equipment we use, will also cause great errors in the accuracy of our test data, standard operation, clear instrument usage methods and Application conditions are one thing that each of us must know.