|product name:||Dust laser gas analyzer|
|Measurement object:||Dust particles in the air|
SK650-PM2.5 is based on the backscattering principle of soot particles, and is used for continuous measurement of particulate pollutants from fixed sources on-line.
使用了一个 10mw ， 650nm 的半导体激光器，激光束及反射光，光直射入眼睛会造成严重的损害。 Note: SK650-PM2.5 uses a 10mw , 650nm semiconductor laser. The laser beam and reflected light. Direct light entering the eyes will cause serious damage. Do not look directly into the laser beam and its reflected light. Do not operate outside the scope of this manual without proper training.
The working principle of the SK650-PM2.5 soot and dust meter is: the laser beam emitted by the laser transmitter enters the sewage source, and it suddenly scatters with the smoke and several ships. The laser receiver detects the received backscattered beam, and the circuit and conditioning part of the system converts the signal into a standard signal output that is proportional to the depth of the soot, so as to obtain the emission concentration of the soot particles from the pollution source.
烟尘仪是由光学部分、电路及调理部分、标定校准器、气幕保护部分组成。 SK650-PM2.5 soot meter is composed of optical part, circuit and conditioning part, calibration calibrator, and air curtain protection part. The optical part includes laser light source and power control, photoelectric sensing, and scattered light receiving part. 650nm 束以一个微小的角度射入排放源，激光束与烟尘粒子作用产生散射光，背向散射光通过接受系统进入传感器转变成电信号进行处理。 The 650nm beam emitted by the laser enters the emission source at a slight angle. The laser beam interacts with the soot particles to generate scattered light. The backscattered light passes through the receiving system into the sensor and is converted into an electrical signal for processing. V/I 转换功能。 The circuit part realizes photoelectric conversion, modulation of laser beam, signal amplification, mediation, power control of light source, V / I conversion function. The calibrator is used to generate a stable light signal, to perform zero and span calibration on the instrument, and the air curtain protection part is used to protect the laser emission and receiving lens from the influence of pollutants.
． Using laser backscattering principle. 引起的光束摆动； Not afraid of the fluctuating beam caused by the mechanical vibration of the flue and the uneven refractive index caused by the uneven temperature of the flue gas ;
． Single-ended installation, no optical path alignment required. 仪器及防雨系统的安装仅电器连接需要一支螺丝刀， 20 分钟内即可完成安装， 安装维护极其简单，最大强度地减少由于现场安装调试带来的诸多问题。 The design process of the instrument minimizes the complexity of the on-site installation. The installation of the instrument and the rainproof system requires only a screwdriver for electrical connection . The installation can be completed in 20 minutes. The installation and maintenance are extremely simple, and the maximum strength is reduced. Many questions.
． 4-20mA 工业标准电流输出，连接方便； Use standard 4-20mA industry standard current output, easy to connect;
． 5w 左右； The overall power consumption of the instrument is very small, about 5w ;
． Local display setting function, setting operation can be performed by pressing keys at the local place. 混淆及丢失： Place the calibrator in place to avoid confusion and loss:
． High resolution, suitable for monitoring requirements of low concentration emissions, and also for monitoring of high concentration emissions;
． Non-spot measurement, with a large sampling area, can be used for various diameter chimneys.
Fourth, technical indicators
: 160 × 160 × 250mm 4Kg Size and weight : 160 × 160 × 250mm 4Kg
: 温度： -40 ℃ ~65 ℃ / 相对湿度： 0-100% RH Environmental requirements : temperature: -40 ℃ ~ 65 ℃ / relative humidity: 0-100% RH
: ± 2%FS Measurement error : ± 2% FS
: 温度最高 300 ℃ ( 高温需定制 ) Medium condition : temperature up to 300 ℃ ( high temperature needs to be customized )
: 4-20mA Signal output : 4-20mA
: 500 Ω Maximum output load : 500 Ω
: 2mg/m3 Sensitivity : 2mg / m3
: 最小 0-200mg/m3/ 最大 0-10g/m3 Measuring range : minimum 0-200mg / m3 / maximum 0-10g / m3
: 1-15m Can measure chimney size : 1-15m
: 3 W Power consumption : 3 W
: DC 24V ± 10% Power supply : DC 24V ± 10%
Five, scope of application
SK650-PM2.5 can be used for real-time continuous measurement of the concentration of particulate pollutants from various pollution emission sources. It can be equipped with a monitoring system. It can be connected with a single or several sets of smoke and dust monitoring networks and share a front desk. The instrument can be applied to the monitoring of smoke and dust in power plants, steel plants, cement plants, etc., and can also be used in the process control of dust removal equipment and other powder projects.
: Six : System installation and connection
The correct installation of the SK650-PM2.5 dust detector is critical to its effective operation. When installing, you should consult relevant environmental protection laws and regulations to select an appropriate installation point and consult relevant maintenance personnel.
The key factors that must be considered are:
1. The installation position of the optical head should consider such factors as vibration, temperature environment, stability of air flow, the distance between the upstream and downstream bends or changing diameters of the air flow, and the safety of the installation and maintenance channels must also be considered. 一般而言虽然在气流不稳的地方 SK650-PM2.5 可以得到准确的实时测量值，但不满足等动参比的要求，所以不能准确的进行参比 ) ( Generally speaking, although the SK650-PM2.5 can obtain accurate real-time measurement values in places with unstable airflow , it does not meet the requirements of isokinetic reference, so it cannot be accurately referenced )
2. Power supply, cables, wiring pipes, overload protection.
( 距离、路由与其它电磁设备的互相干扰 ) 。 3. Arrangement of signal lines ( distance, routing and mutual interference of other electromagnetic equipment ) .
/ 囱，容易受到激光伤害，应禁止。 4. Entering the flue / chimney is susceptible to laser damage and should be prohibited.
Embedded flange and welding
65 的钢管上，钢管必须埋置或焊接在烟囱 / 道上。 The flange must be welded on a steel pipe with an inner diameter> 65 , and the steel pipe must be buried or welded on the chimney / lane. 15KG 的烟尘监测仪的本体重量。 The embedded and welded strength of the flange should be able to withstand the weight of the soot monitor of about 15KG . ( 图 2) 。 Pay attention to the orientation of the flange when welding ( Figure 2) . / 道之间距，一般预留此尺寸为 50-70mm 作为扳手空间。 The distance between the flange and the chimney / channel must be shortened as much as possible . Generally, this size is reserved for 50-70mm as the wrench space. / 道内 1.5m 左右。 The instrument's sampling sensitive area is about 1.5m in the chimney / lane in front of it . 2.5 米则需要在选用时定制 . For smaller chimneys, if the inner diameter of the chimney is less than 2.5 meters, it needs to be customized at the time of selection .
8 的螺栓连接 , 螺栓和紧固螺母 ( 蝶形螺母 ) 已经包含在标准配置中 , 不用再另外准备。 The body of the soot monitor and the fixed flange are connected by four bolts with a diameter of 8 , the bolts and the fastening nuts ( wing nuts ) are already included in the standard configuration , so no additional preparation is required. . Configurations that include a rain cover Note that the soot rain cover fixing thin flange piece is placed between the welded flange and the soot dust flange .
Protective gas connection
-100 帕，可以直接将风室及主机通过螺栓进行连接，如果烟囱内压力〉 -100 帕，则需要提供保护气源。 When the flange is welded to the chimney, if the pressure in the chimney is negative -100 Pa, the air chamber and the host can be directly connected by bolts. If the pressure in the chimney is -100 Pa, a protective gas source needs to be provided.
In the case of negative pressure, an air filter can be directly connected to the air inlet of the air chamber.
200 微克 / 立米。 In the case of positive pressure, a fan or compressed air source is required. It is necessary to ensure that the gas is clean air and the dust content should be less than 200 micrograms per cubic meter. 200Pa 以上。 The pressure of the fan should be more than 200Pa above the measuring point pressure .
When the measuring point is negative pressure, the air filter can be directly installed on the soot meter body. If the measuring point is positive pressure, a high pressure fan needs to be connected in series between the soot meter body and the filter.
3 示为接头的正面及反面接线端子。 Cables can be connected after the system is installed. The instrument provides a waterproof connector with four terminals for connection. Figure 3 shows the front and back terminals of the connector. There are four terminals in the wiring, which are defined as:
( 安全地 ) 0 --- chassis ground ( safety ground )
1 --- 24VDAC power positive
2 --- 4-20mA positive current output
(24VDAC 电源负极和 4-20mA 电流输出负极 ) 3-- Common terminal (24VDAC power supply negative and 4-20mA current output negative )
“ O ”圈及垫片不要忘记安装 Note that when the cable is connected through the terminal block, do not forget to install the " O " ring and gasket for waterproofing.
.系统校准 Seven . System calibration
The system is equipped with a calibrator for zero and span calibration. When calibrating, unscrew the wing nut and take off the host. Align the positioning pin of the calibrator with the pin hole on the host and insert it. The output value can be measured from the output terminal. Rotate the calibration tool to check the zero and span points in turn.
'Z'、'S'、'X'字样，分别代表零点、跨度点调整、工艺调整。 Open the back cover of the soot meter, you can see that there are four holes on the adjustment end face , and the words 'Z', 'S', and 'X' are marked next to them , which represent the zero point, span point adjustment, and process adjustment. The user is only allowed to adjust the zero and span points at the scene.
If there is a deviation between the soot meter output and the nominal value, it can be adjusted by adjusting the corresponding adjustable potentiometer.
It is recommended to perform a calibration after the instrument has been repaired and adjusted.
Regardless of penetration or scattering, the physical properties, size, and concentration of soot particles will affect the optical signal. Setting a unified range cannot fully adapt to different measurement targets. When performing a span calibration, it is necessary to record the size of the signal value as a standard value. The next calibration is performed based on this standard value.
仪器动态测量范围的设置 Setting the dynamic measurement range of the instrument
SK650-PM2.5出厂前已据用户的反馈信息对动态范围进行了调整，但由于烟尘散射与烟尘的光学特性相关，虽然对一个具体的排放源而言相同的烟尘浓度对应相同的信号输出，但不同的排放源既使排放浓度相同由于烟尘颗粒物的光散射特性不同输出信号却可能有差异。 Before the SK650-PM2.5 leaves the factory, the dynamic range has been adjusted according to user feedback. However, because the soot scattering is related to the optical characteristics of the soot, although the same soot concentration corresponds to the same signal output for a specific emission source However, even if different emission sources have the same emission concentration, the output signal may be different due to different light scattering characteristics of soot particles. This may cause the dynamic range setting before leaving the factory is not suitable for the user's site conditions, and the signal output after the instrument is installed is too low to lose the sensitivity of the instrument or too high to exceed the dynamic range of STEP_DUST.
SK650-PM2.5安装在排放源后，读数一直低于测量量程的5%那么在进行参比试验前应增大信号的增益值。 If the SK650-PM2.5 is installed after the emission source, the reading is always less than 5% of the measurement range, then the signal gain value should be increased before performing the reference test. Use the adjustable resistor on the optical head circuit board to adjust the reading to more than 10% of full scale. After adjustment, use the calibration tool to record the new full scale and span value as a fixed reference point for future maintenance.
SK650-PM2.5安装在排放源后读数超出满量程，那么在进行参比试验前应通过高调整光学头电路板上的电阻调低信号的增益值。 If the reading of the SK650-PM2.5 is beyond the full scale after the emission source is installed, the gain value of the signal should be lowered by adjusting the resistance of the optical head circuit board before performing the reference test. After adjustment, you must use a calibration tool to perform calibration, record the full scale and the output signal value of each standard for future reference as a fixed reference point for the instrument.
维护 Nine. Maintenance
First time installation and maintenance
3天第一次检查仪器,而后30天再次检查,如无问题,则可以3个月为间隔检查STEP_DUST,此检查主要的检查光学窗口是否被污染,清洁风系统系统是否有效。 It is recommended that users check the instrument for the first time in 3 days after the system is installed , and then check it again in the next 30 days. If there is no problem, you can check STEP_DUST at intervals of 3 months. effective.
SK650-PM2.5次检查发现仪器环境恶劣，不能满足要求，用户需经常更换空气过滤器，则需要改变常规的维护时间，根据实际情况而定。 Under normal circumstances, it is recommended to check every quarter. If the first SK650-PM2.5 inspection finds that the environment of the instrument is bad and cannot meet the requirements, the user needs to change the air filter frequently, then the routine maintenance time needs to be changed, depending on the actual situation .
All internal optics are adjusted and installed by special tools before leaving the factory. Users must not adjust them.
50%的酒精和蒸溜水的溶液，酒精要用化字纯级的，注意不要用含有油的酒精，用含有油分的酒精溶液清洁光学窗口时，当酒清发掉时仍有残留的油分。 During normal maintenance, only the optical window needs to be cleaned. The cleaning solution is a solution of 50% alcohol and distilled water. The alcohol must be pure grade. Be careful not to use oil-containing alcohol. Use an oil-containing alcohol solution to clean the optical window. At that time, there was still oil remaining when the wine was washed out. When the surface of the optical window is stained with soot, it must be cleaned, otherwise the accuracy of the measurement results will be affected.
The cleaning system has an air filter to ensure that dust does not enter the optical head. ,用风吹掉上面的灰尘,也可以用请水冲洗,如果过滤器过滤面无损伤,过滤器风阻不大,还可以继续使用,经常检查过滤器的工作状态，保证足够的清洁气。 The air filter should be cleaned or replaced regularly. The air filter can be removed , and the dust on it can be blown off with wind. It can also be rinsed with water. If the filter surface is not damaged, the air resistance of the filter is not large, you can continue to use it. Check the working condition of the filter frequently to ensure sufficient clean gas. In addition, pay attention to the location of the cleaning filter to ensure that rainwater, etc. will not enter the fan and the instrument when passing through the filter.
。 Do not look directly into the laser beam and its reflected light .
SK6500-PM2.5型运行时，不要进入烟囱/道。 When the SK6500-PM2.5 is operating, do not enter the chimney / lane.
Do not operate outside the scope of this manual without proper training.
SK6500-PM2.5 type is not installed in front of the chimney / lane. Do not power on.
SK6500-PM2.5 uses a 10mw, 650nm semiconductor laser. Direct laser beam and reflected light will cause serious damage to the eyes.