SR Freeness Tester (Automatic)
Categories：Pulp & Paper Tester
Name：SR Freeness Tester (Automatic)
Model：PN-SDJ100AF
PN‑SDJ100AF Automatic Beating Degree Tester (also known as Schopper‑Riegler Tester) is a professional instrument designed on the principle of the Schopper‑Riegler method for accurate measurement of the drainage property of pulp.
Introduction
PN‑SDJ100AF Automatic Beating Degree Tester (also known as Schopper‑Riegler Tester) is a professional instrument designed on the principle of the Schopper‑Riegler method for accurate measurement of the drainage property of pulp.
This latest‑generation tester adopts pneumatic automatic control, eliminating inconsistencies in force and speed caused by manual operation. It delivers remarkably better repeatability and test accuracy compared with manual instruments. One‑touch operation simplifies the testing procedure and greatly improves inspection efficiency, making it an essential testing device for beating‑degree quality control in China’s paper‑making industry.
Working Principle：
Pulp of a given concentration and volume is poured into a container fitted with a filter screen at the bottom. Water from the pulp permeates through the screen. Pulp with different beating degrees shows different water‑permeation rates. The higher the beating degree, the poorer the drainage property of the pulp. The beating degree of pulp is measured indirectly by recording the water permeation rate.
Technical parameter
1. Power Supply: AC (100‑240) V 2 A 50/60 Hz
2. Measuring Range: (1‑100) °SR
3. Lifting‑up Speed of Sealed Cone: (100±10) mm/s
4. Graduation Value of Indicating Cylinder: 0.1 °SR
5. Drainage Time of Overflow Outlet: (149±1) s
6. Residual Volume: (7.5‑8) mL
7. Pressure: ≥ 0.2 MPa
8. Air‑source Pressure: (0.6‑0.8) MPa
9. Display: 7‑inch Color Touch‑Screen
10. Print Output: Modular Integrated Thermal Printer
11. Communication Output: Wi‑Fi RS232 (Standard) / USB (Optional)
12. Ambient Conditions: Indoor temperature (20±10) ℃; Relative Humidity ＜ 85%
13. Overall Dimension: (500 × 350 × 900) mm (Length × Width × Height)
14. Net Weight: Approx. 34 kg
Product features
1. 【Pneumatic Release Mechanism】: Made of stainless‑steel material and equipped with a pneumatic lifting mechanism for easy operation.
2. 【Automatic Weighing Function】: Automatically calculates the beating‑degree value via weighing method. Built‑in statistical function displays average value maximum value minimum value standard deviation and coefficient of variation.
3. 【Accurate Pulp Evaluation】: Quantifies the fiber beating level by measuring the drainage rate providing critical data for pulp blending and papermaking processes.
4. 【Standardized Test Procedure】: Pneumatic control guarantees consistent test conditions across different batches and operators fully compliant with GB and ISO standards.
5. 【Constant‑pressure & Reliable Data】: The pneumatic system automatically maintains stable pressure strictly conforming to the Schopper‑Riegler method. It avoids pressure fluctuations caused by manual loading and delivers highly‑reliable test results.
6. 【Lower Maintenance Cost】: The pneumatic structure features little complex mechanical wear offering longer service life and much‑lower long‑term operating costs than manual testers.