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The first step of installing the gas detector is to install the gas detector in the area where there may be gas leakage. The gas detector must be installed securely, and the installation position is determined based on the specific gravity of the gas to be measured relative to the air. The specific gravity of the gas to be measured is less than Air, detectors should be installed 30 to 60cm from the ceiling. Secure the detector to the wall with a Φ8 expansion screw.
However, in order to ensure the correct use of the detector to prevent its failure, the following is the phenomenon of attention (not easy to install):
1. Places where the temperature is below -40°C or above 70°C. 2. Places where air flow is large, such as air supply ports, ventilation fans, and doors. 3. Where water vapor and water droplets are abundant (relative humidity: more than 90%)
4. The second step in the place directly affected by steam and fumes is the wiring: the wiring should use a highly shielded wire to prevent the electrical signal from being disturbed. Place the wire well and open the top cover.
1. The gas detector of a gas detector generally adopts three-wire transmission. The positive pole of the power supply is marked with ("VCC" terminal), the signal line (terminal labeled "SIG"), and the negative pole of the power supply (terminal labeled "GND". ) Correspond to “24V, mA, and GND†of a group of terminals labeled “4-20mAIN†on the access channel module, the chassis ground (shielding mesh of the cable) is well grounded. After the cable is connected, the chassis is fastened.
2. Start: Wiring is completed and the detector is powered. The reading will be stable from the over-range reading to just about 15 minutes after the start.
In addition to correct installation, you should also understand simple maintenance.
1. Sensor maintenance: Generally, it is necessary to re-inspect the calibration during installation and use for six months to one year, and a test report shall be issued by the testing party.
2. When the sensor of the gas detector loses sensitivity, it needs to be replaced. The metal tube float flowmeter, turbine flowmeter, and vortex flowmeter will know whether the sensor is ineffective through periodic calibration. When the calibration value fails to reach the standard gas value, Replace the sensor.
3, the gas detector inspection: the detector should be regularly checked, it is in the clean air signal current DC4mA.
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Analysis of gas detector installation and maintenance
Gas detectors are mainly divided into two kinds of portable gas detectors and handheld gas detectors. They are an instrumentation tool that detects the toxic and harmful gases in the environment through a sensor and sends an early warning. When using a gas detector, it must be performed. The correct installation can guarantee the normal use. Let's take a brief introduction.
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