Precautions to be taken for routine maintenance of gas detectors
Most of the gas detectors currently available on the market for use in limited spaces are used for gas detection, explosive gases, carbon monoxide, hydrogen sulfide and other gases, because these hazardous gases are the most common, but the instrument manufacturer cannot guarantee the suitability of the instrument. sex. Therefore, the applicability issue should still be evaluated and determined by the purchase and use environment. Therefore, when selecting a detector, you should consider the following aspects: applicability, capabilities and limitations, reliability, stability, protection requirements, legibility and convenience to choose a detector that suits you.
Gas detectors mainly use gas sensors to detect the types of gases present in the environment. Gas sensors are sensors used to detect the composition and content of gases. It is generally believed that the definition of gas sensor is based on the detection target. That is to say, any sensor used to detect gas composition and concentration is called a gas sensor, regardless of whether it uses physical methods or chemical methods. For example, sensors that detect gas flow are not considered gas sensors, but thermal conductivity gas analyzers are important gas sensors, although they sometimes use roughly the same detection source and are used in many businesses and homes. Gas detectors are easily available on the market, but they will inevitably encounter some malfunctions during use. Many times we encounter only minor faults, which we can fix ourselves, but because we don't know some common sense, we can only ask professionals to help repair them. The following will introduce to you the common faults and repairs of gas detectors.
Possible failures and causes of gas detectors are analyzed as follows:
No display when booting. Membrane switch failure; battery lead broken: battery voltage is seriously insufficient.
There is only a negative sign when turning on the power, and even pressing the "Voltage" key does not result in a count. The regulated power supply is faulty or its output side is short-circuited.
There is only a decimal point at startup. There is a loss ring in the sensing element; or a component in the bridge circuit is desoldered.
There will be no alarm if the limit is exceeded. The sounder is damaged: the alarm circuit is disconnected.
The accuracy cannot be adjusted to the standard gas sample. The explosion-proof cover is seriously dusty; the sensor is aging.
Gas detector repair requirements:
It is prohibited to dismantle the instrument at will. Maintenance work should be performed by trained professionals.
When a malfunction occurs during use, it is not allowed to dismantle the machine for repair underground.
The sensor and battery pack are special explosion-proof components. If damaged, they must be replaced as a whole. Spare parts will be provided by our factory and other types of components may not be substituted.
