The latest smoothness analyzer detailed description and experimental methods

The smoothness tester (also known as the paper smoothness tester) uses a high-precision vacuum sensor to measure the vacuum degree of the vacuum container, thereby replacing the mercury pressure gauge, so the smoothness tester is a mercury-free smoothness meter; imported Vacuum mercury draws vacuum from the vacuum container, can reach the required degree of vacuum in a very short time, and is controlled by the single-chip microcomputer; it also has powerful data processing functions: not only can the smoothness value of a single sample be measured and automatically stored, but also It can count the experimental data of multiple samples in the same group, and can calculate the maximum value, minimum value, average value, standard deviation and variation coefficient of the same group of samples. These data are stored in the data storage and can be passed through the digital tube. Display; In addition, the smoothness meter also has a print function.

Features

1. Oil-free vacuum pump: The vacuum pump imported from Germany can be used without the oil pump. The instrument is oil-free and non-polluting. (Advantages: The oil-free vacuum pump is a mechanical vacuum pump that can run without any oil lubrication. It has It has the advantages of simple structure, easy operation, convenient maintenance, no pollution to the environment, etc. The oil-free vacuum pump has good durability and is vacuum pumping and compression, dual-purpose vacuum pump, and it is a basic equipment that can be widely used to obtain vacuum.) (Principle: Its working principle is the same as that of a general displacement pump, and consists of stator, rotor, rotor, cylinder, motor, etc. The rotor with a rotary vane is eccentrically mounted in a fixed cylinder, and when the rotor rotates at a high speed, the rotor slot The four radial sliding rotors divide the pump chamber into four working chambers. Due to the centrifugal force, the rotary vanes are tightly attached to the cylinder wall, the stator inlet and outlet are separated, and operation is performed again and again to carry out variable capacity and suction gas. Exhaust from the exhaust, so as to achieve the purpose of pumping.)

2. Pre-press time selection: The instrument has "60 seconds pre-pressure automatic control" function selection, the user can choose whether to use this function according to need.

3. Fast measurement: It can be measured with a small volume cavity, and the measurement time is only one-tenth of that of a large cavity, which greatly saves the measurement time and enables rapid measurement. (High smoothness, choose a small volume, otherwise, select a large volume)

4. Good sealability: The use of foreign vacuum sealant and advanced sealing technology, so that the instrument sealing meet the requirements of national standards.

5. With modular integrated printer, easy installation and low failure; thermal printer and dot matrix printer are optional. (Thermal micro printer: The thermal method is to heat the thermal media coated on the printing paper. Discoloration; thermal micro-printer type is also a relatively common micro-printer, but it is later than the pin-type micro-printer out. Print speed is fast, noise is low, the print head rarely occurs mechanical loss, and does not require ribbon, eliminating the need for Change the ribbon trouble

The Chinese-British freedom switch uses a large LCD display module to display operation steps in Chinese, display measurement and statistical results, and friendly human-machine interface makes the operation of the instrument simple and convenient, reflecting the humanized design concept. (automatic storage of experimental data, power-off protection)

experimental method

Before testing, calibrate the instrument if necessary

During the test, the measuring surface of the sample is placed against the glass plate, and then the pad and the upper platen are placed on the sample, a pressure of (100±2) kPa is applied, and a vacuum of 50.66 kPa is generated in the large vacuum container. Measure and record the time required to reduce the vacuum from 50.66 kPa to 48.00 kPa in seconds. If the time exceeds 300s, use a small volume and retest with another style. If the time is less than 15 s, the additional sample is used to test the time required for the vacuum to drop from 50.66 kPa to 29.33 kPa. The time from the start of the loading of the specimen to the time shall be approximately 60 seconds

To test the smoothness of the other side, apply another 3 samples according to step 2