Product Introduction 
The paper tearing tester operates on the Elmendorf method principle, measuring the force required to tear a paper or board specimen to evaluate its tearing resistance. A standard-sized specimen with a pre-cut initial slit is clamped between pendulum-type fixtures. When the pendulum is released, it tears the specimen from the initial slit during its swing. The instrument uses a high-precision photoelectric shaft encoder to measure the energy consumed during the tearing process and converts it to a tearing force value displayed on the LCD screen. The computer control system automates testing, data processing, and result display, with a user-friendly interface for simple operation.

Key Features
Wide Range High-Precision Measurement Measuring range 10-8000 mN, optionally extendable to 16000 mN, meeting testing needs from thin paper to higher-strength board.
Standard Elmendorf Method Fully compliant with ISO 1974 and GB 455.1 standards, delivering internationally recognized test results suitable for QC, R&D, and teaching.
High-Precision Photoelectric Encoder Uses a high-precision photoelectric shaft encoder for accurate and repeatable tearing energy measurement.
LCD Display Interface Intuitive on-screen interface for straightforward parameter setting and result viewing.
Mechatronic Integrated Design Combines precision mechanical structure with microcomputer control, offering compact design, stable performance, and easy maintenance.
Standard Specimen Initial Cut Initial cut length 20±0.5 mm and clamp distance 2.8±0.3 mm, strictly complying with standard specifications.
Reliable Pendulum Release Mechanism Initial tearing angle 27.5±0.5° and tearing arm length 104±1 mm ensure consistent and standardized test conditions.
Calibration Weights Included Supplied with two standard calibration weights for convenient routine accuracy verification and calibration.

Main Technical Specifications

FAQ
1. What types of paper and board are suitable for tear testing?
It is suitable for various types of paper and lower-strength paperboard. For thick boards with high tearing resistance, the extended measuring range up to 16000 mN can be selected. Please consult us to confirm applicability.

2. What specimen preparation is required before testing?
Specimens should be cut to specified dimensions and conditioned under standard temperature and humidity. A standard initial cut must be made on each specimen. Refer to ISO 1974 or GB 455.1 for detailed size requirements and preparation methods.

3. How can I ensure measurement accuracy?
The instrument is factory-calibrated. Routine verification can be performed using the included standard calibration weights. Ensure specimens are clamped flat, initial cuts are correctly made, and the testing environment meets standard requirements.

4. Can the instrument measure both machine direction and cross direction tear?
Yes. Paper tear is typically tested in both machine direction (MD) and cross direction (CD). The testing method is identical; only the specimen cutting direction differs. Comparing MD and CD tear strength helps assess paper anisotropy.

5. What if the LCD display appears abnormal or unclear?
First, check the power connection. If the display remains abnormal, it may be due to a loose cable or backlight issue. Contact our after-sales team for inspection; do not disassemble the display module yourself.

6. Does the pendulum mechanism require regular lubrication?
The pendulum bearings are lubricated at the factory and generally do not need frequent re-oiling. Keep the equipment clean and periodically wipe the body with a soft cloth to prevent dust from entering bearing components. If pendulum movement becomes stiff, contact after-sales service.

After-Sales Service 
Established in 2007 and with nearly two decades of experience, Shandong Annimet Instrument Co., Ltd. is a professional manufacturer integrating R&D, production, and sales of laboratory testing and sample preparation equipment. Quality is our foundation. We are your bridge from concept to reality. We deliver more than just instruments — we deliver confidence. This Paper Tearing Tester comes with a 12-month warranty and lifetime technical support. Our professional team offers 24/7 service response, free installation guidance, operation training, and testing method consultation. For any inquiries, please contact our customer service team; we are dedicated to providing comprehensive pre-sales, in-sales, and after-sales support. Hotline: 400-9933-057, Email: anmt_test@126.com.