Brief Instructions for Installation and Use of Gas Monitoring System

1、 Power supply section:

When connecting the power plug to a 220V AC power supply, ensure that the ground wire is well grounded.

IIDetermine the installation position of the chassis and sampling tube:

1，The selection of the installation location for the sampling tube is generally based on the temperature at the sampling pointAround 20 degrees is the optimal temperature, but this is basically impossible, so it is advisable to choose a relatively low temperature point to install the sampling tube. Simultaneously consider the distance between the host box and the pipeline laying route.

2，The selection of the installation location for the host box, firstly, the temperature tolerance range of the internal sensor components is-20 ℃~+50 ℃, the optimal working temperature is around+20 ℃, so it is necessary to choose a place where the ambient temperature is not lower than -20 ℃ or higher than+50 ℃ for installation.

3，The distance between the sampling point and the main box pipeline, and the vacuum pump used inside the main box is a small positive diaphragm pump with a vacuum degree ofAround 50KPa-70KPa, the principle of pipeline length is that the shorter the temperature, the better. The longer the pipeline, the longer the data delay. Generally, there is no problem within 20 meters. It still needs to be determined based on the actual situation on site.

3、 Gas pipeline connection part:

1，There are four pipeline interfaces: one is a sampling inlet that enters the system; Gas exhaust outlet after continuous testing; Two way filtration and water removal gas outlet. The default interface isA PU hose with an outer diameter of 6mm and an inner diameter of 4mm can be used for a diameter of 6.

Schematic diagram of pneumatic interface

2，Installation of Sampling Tube: SamplingInsert the tube into the pipeline of the gas to be tested and fix it with the matching flange. If the temperature of the gas in the pipeline to be tested is higher than the heat-resistant temperature of the sampling tube, the pipeline in the early stage of sampling should be equipped with heat-resistant pipelines and pre cooled before connecting to the sampling interface of the detection system with a PU hose, which is labeled as the "sampling" interface.

Installation of sampling tube

3，Connection method of air outlet interface:

drain portUse a PU hose with a diameter of 6 to connect, mainly discharging the gas detected by the flow detector.

drain outletTwo drainage outlets, for useThe PU hose connection with a diameter of 6 can be combined into one pipeline with a three-way head for discharge. Most of the sampled gas and water vapor are discharged from here. If the temperature and humidity of the gas pipeline to be tested are high and contain a lot of water vapor, it will indicate that water will flow out from the second drainage outlet. Therefore, the drainage pipe should be installed downwards to ensure smooth discharge of water flow.

IIIPrecautions during debugging:

1，Flow control: During system operation, the flow rate of gas passing through the detection instrument is controlled by adjusting the flow meter and the throttle valve on the lower drainage pipe of the condenserAbout 400ml/min.

2，If external devices need to be connected to the systemWhen reading concentration data with a 4-20mA output signal, the blue wire of the 4-20mA output signal has been connected to the terminal block. The blue wire represents the positive pole of the current output, and the negative pole of the current output is the 24V negative pole. If you want to use the RS485 interface to read concentration data, you need to insert a DB9 connector into COM2 on the back of the touch screen. The 9-pin is 485A and the 8-pin is 485B. It needs to be operated in conjunction with the communication protocol. If necessary, please contact the business for assistance.

3，The target condensation temperature of the condenser can be set to the default temperature.

Regular manual maintenance and cleaning of the dust filter are required to prevent dust from blocking the air path.

Installation case of gas online monitoring system

1Changzhou Xinao Gas Engineering Co., Ltd

Measure the concentration of carbon monoxide in the kiln at an ambient temperature of 250-330 ℃, detect the high alarm value of the kiln concentration, measure the explosive value of the concentration, and ignite the gas if it does not exceed the explosive value.

2、 Changshu Youbang Radiators Co., Ltd

Measure the emission of volatile organic compounds (VOC) waste gas from the chimney, with a chimney pipeline temperature of 160 ℃. Set a first level alarm and a second level alarm, with a low alarm for concentrations below 15% and a high alarm for concentrations above 20%. The data is transmitted to the monitoring room for real-time online monitoring.