Product Introduction

The Short-Span compression tester operates on the short-span compression principle. Under a specified clamping length (30±0.5 mm) and compression distance (0.7±0.05 mm), a compressive load is applied at a constant speed (3±0.1 mm/min) to a specimen with a width of 15±0.1 mm. A high-precision pressure sensor captures real-time force data, and the compression strength CS value (kN/m) is automatically calculated. The pneumatic automatic clamping system with adjustable pressure ensures the specimen is held firmly without slipping. The open testing port design allows simple and quick specimen placement. The touchscreen control system displays real-time force curves with intuitive graphical test results. The compact horizontal structure is suitable for benchtop laboratory placement.

Key Features 
High-Precision Pressure Sensor High-precision pressure sensor with an accuracy of 0.15N or 0.01 kN/m, precisely capturing minute compressive force variations for accurate and reliable test data.
Pneumatic Automatic Clamping System Pneumatic automatic specimen clamping with adjustable pressure; maximum clamping force determined by the maximum air supply pressure, offering convenient operation.
Touchscreen Multi-Language Control Built-in touchscreen control system supporting Chinese and English interfaces (French, Russian, and German customizable), with graphical display of test results and compressive strength curves.
Open Convenient Design Open testing port design allows easy specimen placement and removal, improving testing efficiency and reducing operation time.
Multiple Selectable Measuring Ranges Measuring ranges of 100N, 200N, and 500N selectable to meet the short-span compression strength testing needs of various types and thicknesses of paper and paperboard.
Automatic Compression Distance Adjustment Compression distance of 0.7±0.05 mm is automatically adjusted by the instrument, ensuring precise and consistent test conditions without manual adjustment errors.
Standard Specimen Size Compatibility Specimen width of 15±0.1 mm and clamping length of 30±0.5 mm, strictly complying with short-span compression test standard requirements.
Horizontal Compact Structure Design Overall dimensions of 430×430×260 mm, net weight of 28 kg; horizontal design with a low center of gravity and robust structure suitable for long-term laboratory use.

Main Technical Specifications 

FAQ 
1. What is the difference between short-span compression testing and conventional compression testing?
Short-span compression testing is specifically designed to measure the compressive strength of paper and paperboard under an extremely short span (clamping length of only 30±0.5 mm and compression distance of only 0.7±0.05 mm). It more accurately evaluates the compressive capacity of the paper fiber network in a nearly pure compression state, avoiding the influence of bending or buckling that may occur in long-span compression testing.

2. How should the appropriate measuring range be selected?
Three measuring ranges are available: 100N, 200N, and 500N. 100N is suitable for thin paper and low-strength paper, 200N for ordinary paperboard, and 500N for high-strength paperboard. It is recommended to select the appropriate range based on the expected compressive strength of the material being tested, or consult our technical team for recommendations.

3. Does pneumatic clamping require an external air supply?
Yes, a clean compressed air supply of 0.5 MPa is required (adjustable as needed). Standard laboratory air compressors are generally sufficient; the air supply pressure determines the maximum clamping force.

4. What languages does the touchscreen support?
Standard configuration supports both Chinese and English interfaces. Other languages such as French, Russian, and German can be customized according to customer requirements.

5. Why is the compression distance 0.7 mm?
0.7±0.05 mm is the standard compression distance specified for short-span compression testing. At this micro-distance, the compressive resistance of the paper fiber network within the elastic range is measured, which is an important parameter for characterizing paper compressive performance.

6. Does the instrument require regular calibration?
Periodic force calibration using standard weights is recommended to ensure measurement accuracy remains within 0.15N or 0.01 kN/m. We provide calibration guidance and after-sales support.

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 short-span compression 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 compression strength 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.