1、 Main purpose and scope of application

The QT203M Ringman smoke concentration map is a method for monitoring smoke based on its visual blackness. Due to the difficulty in determining the precise correspondence between the visual blackness of smoke and the content of harmful substances, this method cannot replace the actual measurement of smoke emissions and concentrations. However, due to its simplicity and low cost, this method is listed as one of the commonly used flue gas emission monitoring methods in many countries. Practice has proven that for coal-fired flue gas and the like, flue gas concentration maps can be a useful monitoring tool.

2、 Main technical indicators

Lingman Blackness Level: 0-5

Dimensions: 110×40×2cm high×wide×Thick)

Each level of Lingman diagram size: 21×14cm (width)×High)

3、 Installation

1. Acceptance

After opening the box, please check whether the equipment and accessories of the instrument match the packing list. If there is any damage or missing parts, please contact the manufacturer immediately.

2. Installation

a. Take out the Ringman smoke concentration map and accessories from the packaging box.

b. Connect the handle to the bottom thread of the Ringman smoke concentration map.

c. Take out the tripod and support it. There is a pan tilt with screws at the top of the tripod that can be loosened and removed. After removal, screw the screw into the screw hole at the bottom of the handle, and then clip it back onto the tripod as it is.

4、 Monitoring principle

The Ringelmann smoke concentration map was proposed by Ringelmann in late 19th century France. This method involves placing the image in an appropriate position, comparing the blackness of the image with the blackness (or opacity) of the smoke, and evaluating it visually. Lingman diagrams come in various specifications, and our company prints them in the universal standard form, which is made up of 14cm×Composed of six small pieces with different blackness of 21cm. Except for the two pieces that are all white and all black, the other four pieces have black stripes of different widths drawn on a white background. Divided into Ringman series from 0 to 5 based on the percentage of the area occupied by the black bars in the entire block. Level 0 is all white, Level 5 is all black, Level 1 is black stripes that occupy 20% of the entire area, Level 2 accounts for 40%, and so on.

5、 Usage method

Before observation, place the installed Lingemann smoke concentration map and its tripod in a stable place and hold it steady with your hand to prevent tipping over. Do not add any covering layer on the surface during use to avoid weakening the illumination of the surface. If the image is dirty or faded, it should be replaced immediately to avoid affecting the accuracy of observation.

2. Observation should be conducted during the day, and the tripod should be placed with the surface facing the observer. As shown in the figure, it should be positioned as close as possible to the line connecting the observer to the top of the chimney, and have a similar sky background to the smoke. The distance between the image and the observer should be sufficient to make the lines on the image appear to disappear, thus ensuring that each square has a uniform blackness. For the vast majority of observers, this distance is about 15 meters or more.

3. When observing, the blackness of the smoke that has just left the chimney should be compared with the blackness on the graph, and the Ringman series of the smoke and the duration of continuous emission of smoke with this blackness should be recorded. The blackness of smoke is between two Ringman levels, which can be estimated as a 1/2 or 1/4 Ringman level.

4. Observe the smoke as much as possible under relatively uniform sky illumination. When observing under sunlight, try to make the illuminating light form a right angle with the line of sight. Light should not come from the front or back of the observer. The white square provides an indicator of lighting, used to detect any shading, uneven lighting, rain spots, or other stains on the image. If observed in cloudy conditions, due to the dark background of the sky, a slightly lower level should be taken based on experience when reading.

5. The viewing angle of the smoke should be as low as possible. It is advisable to avoid observing at overly steep angles as much as possible.