Pressure tester C640

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The C640 thickness tester is a high-precision mechanical-contact instrument for measuring the thickness of films, sheets, paper, corrugated board, textiles, non-wovens and rigid insulation materials. An optional auto-sampler enables successive multi-point measurement. Embedded Labthink operating software provides intelligent data processing, user management and secure storage.

Key features

• Professional: High-precision displacement sensor with engineered structure and advanced control to maximise stability, repeatability and accuracy. Automatic lift/lower pressure foot reduces operator error. Contact time and test speed are configurable; contact areas and pressures can be customised. Multi-point calibration improves linearity; a standard gauge block is available for fast calibration.
• High efficiency: Automated structural design minimises manual intervention. Parameter program function saves test setups for reuse. Results include maximum, minimum, average and standard deviation; comparison functions assist evaluation. Optional auto-sampling supports configurable feed distance, feed speed and measurement points for accurate successive-point testing.
• Intelligent: Embedded Labthink software offers a user-friendly interface, strict user management and secure data handling. Optional DataShieldTM provides encrypted storage and centralised management. Test data display supports curves and lists; data can be searched, exported and printed.

Test principle
The pre-conditioned specimen is placed on a flat test plane. A pressure foot, parallel to the plane, descends under a defined pressure; the displacement sensor measures the distance between the upper and lower surfaces, giving the specimen thickness.

Test standards

• ISO 4593
• ISO 534
• ASTM D6988
• ASTM F2251
• GB/T 6672
• GB/T 451.3
• TAPPI T411
• BS 2782-6
• DIN 53370
• ISO 3034
• ISO 12625-3
• ISO 5084
• ASTM D374
• ASTM D1777
• ASTM D3652
• GB/T 6547
• GB/T 24218.2
• FEFCO No 3
• EN 1942
• JIS K6250
• JIS K6783
• JIS Z1702

Applications

• Basic applications:
  • Films and sheets: Thickness measurement of plastic films, sheeting and membranes.
  • Paper: Thickness measurement of papers, paperboard and composite boards.
• Extended applications:
  • Metal pieces & Silicon wafers: Thickness measurement of wafers, foils and metal parts.
  • Corrugated board: Thickness measurement of corrugated paperboard.
  • Textiles: Measurement of woven, knitted and coated fabrics.
  • Non-wovens: Measurement of non-wovens such as diapers, sanitary napkins and medical masks.
  • Other materials: Rigid insulation, adhesive tapes, geosynthetics, rubbers, etc.

Technical specifications

• Model: C640 (variants: C640M, C640H)
• Measuring method: Mechanical contact
• Standard test range: 0 ~ 2 mm (C640M / C640H)
• Resolution: 0.1 μm
• Repeatability (within range): C640M: 0.8 μm; C640H: 0.4 μm
• Optional ranges: 0 ~ 6 mm (Option 1); 0 ~ 12 mm (Option 2)
• Feeding space (auto-sampler): 0 ~ 1000 mm (adjustable)
• Feeding speed: 1.5 ~ 80 mm/s (adjustable)
• Example test pressures & contact areas: Film: 17.5 ±1 kPa, 50 mm²; Paper: 100 ±1 kPa (standard) or 50 ±1 kPa (optional), 200 mm². Custom pressures, contact areas or curved pressure feet available on request.
• Options: Auto-sampler; DataShieldTM (secure data management)
• Dimensions (L×W×H): 370 × 350 × 410 mm
• Net weight: 26 kg
• Output/results: Max, Min, Average, Standard deviation; curves and data list; search, export and print functions.