General

Opacity tester (Light impermeability tester) is a method to determine the light impermeability of plastic pipes and fittings within a certain condition of the green light with a wavelength of 550±10. Its main purpose is to determine the uniformity of the pipe material and the inhibition of long-term use of the pipe on the growth of algae and other light-requiring microorganisms inside the pipe.

Feature

The machine is a full-automatic machine, grating is automatically selected, no manual operation is required after the test begins. a single sample can be tested once. Operators do not have to change the sample and grating repeatedly.

Illuminant adopts a high filter parallel light tube, the output light is rectangular light, so as to ensure the parallelism of the output light and can be well suppress the stray light. It can also maximize the permeability of the specified wavelength of light.

The special tailor-made optical integrating ball is used in the tester to ensure the lighting is stable and in a small fluctuation.

The collecting part of the circuit adopts the special setting of eliminating interference, which greatly guarantees the accuracy of the data.

Application

This instrument is applicable to evaluate the permeability of homogeneous solid materials, laminated materials, foam materials, film materials and so on to specific wavelengths under specified test conditions.

Standards

GB/T21300-2007《Determination of light impermeability of plastic pipes and fittings》

ISO7686：2005。

Test Procedure

The specimen should be divided into 4 groups and placed horizontally on the specimen holder, and the convex surface of the pipe fitting should be parallel to the optical tube. The parallel light with a wavelength of 550±10 needs to be irradiated three times at different positions of the horizontal line at the highest point of the same graph on each specimen, and calculate the average value. After all 4 groups were tested, the maximum of the average value is the opacity.

Specification

1 Main Frame

1

4

3

2

(fig. 1)

1. Touchscreen 2. Specimen Chamber 3. Power Button 4. Printer

2 Specimen Holder

Specimen should be placed in position as shown below

4

3

1

5

2

（fig. 2）

1.Light transmission hole 2. Specimen one 3. Specimen two 4. Specimen three 5. Specimen five

Note: No article should be placed in the light transmission hole during conducting a test

3 Illuminant

The illuminant is strictly limited by wavelength limiting device so that the green light with a wavelength of 546 can be used as maximum luminous flux. Shown as fig. 3

（fig. 3）

Preparation of test specimen

The products with the thinnest wall thickness in the manufacturer's product series should be tested. Cut off appropriate length of pipes or fittings, which can be divided into 4 equal parts in the circumferential direction, as shown in figure 4.

For large diameter pipes, specimen of appropriate size can be taken in 4 equal parts based on preceding specimen. For small-diameter pipe, when the width is not up to the requirements, the sample can be pressed flat in a condition of no significant change in sample thickness.

Dimensions of specimen

Standard specimen dimensions: Φ16，Φ20，Φ25，Φ32，Φ40

Specimen requirement

The surface of the specimen must be clean without obvious defects, such as bubbles, cracks, flash, burr, etc.

Test conditions

 The test environment shall be conducted at room temperature of 10~35℃ and humidity of 45%~75%. Other special requirements shall be specified in the product standard.

（fig. 4）

Test Procedure

1 Electricity

Plug in the power of AC~220V, and press the power button on the machine.

2 Specimen Dimension Settings

Click the "menu" button in the main interface, and the test interface will automatically jump into the settings interface.

(Main interface is shown as fig. 5, setting interface is shown as fig. 6)

（fig. 5）

（fig. 6）

Click the "specimen setting" button in this interface, and the screen will automatically jump into the fig. 7. Select and click the "history record”, the screen will automatically jump into the fig. 8. The "device debug” and "calibration setting" buttons are used for factory debugging and these factions are protected with passwords. with password protection.

（fig. 7）

In this interface, you can input the specimen number and select a size of current specimen within a range of Φ16 ~ 40 Φ. When the specimen number and size are set, click the "enter" button to finish.

（fig. 8）

This is history record interface. The tester can store 5 testing results in total, and the current testing result will be srored as “record 01”. completed is always stored in 'record 01'.

3 Placement of Specimen

Click “specimen out” button in the main interface, and place the specimen as required properly. Click “specimen in” to finish the step.

4 Start the Test

After the test sample enters the main machine, click the start button, and then the test machine will select the corresponding grating according to the size of the input sample. When the grating is selected, the test machine will start the test formally. After the test machine completes the measurement of each point, the data will be displayed to the corresponding position on the main interface. It will take about 110 seconds to finish the test; no manual intervention is needed during the test. After the test is completed, the machine will reset automatically, and the operator can power off the tester and record the testing result.

5 Power-off

Note: Please record the date after finishing the test and power off the machine.

1. Before powering off the machine, please waiting for the data display is complete and the machine is reset.
2. After the tester is started, it will automatically reset the test group and check if the specimen chamber faction well.
3. The tester has storage function of specimen dimensions. If different specimen have the same aperture, there is no need to set the specimen dimensions repeatedly.
4. Please make sure the specimen holder is clean. The clogging of the light transmission hole of the specimen holder will lead to an inaccurate test result.
5. If the specimen holder or specimen collecting rack cannot be operated normally, most likely is because the limit point has been exceeded. When this situation is occurred, please contact the manufacturer.

6. Calibration

（fig. 9）

The calibration procedure is completed when the equipment is delivered. Optical equipment needs to be annually, which is determined by its characteristics.

Note: This operation needs to be conducted by the company's professional personnel or under the guidance of professional personnel. The company is not responsible for all losses caused by the user's operation.

Packing List