• ASTM E2658: This standard specifies the procedure for calibrating the crosshead speed and displacement of a universal testing machine. It ensures that the machine's crosshead moves at the specified speed and accurately measures displacement during testing, critical for obtaining reliable results in tensile, compression, and flexural tests.
  
  
• ASTM E2309: ASTM E2309 provides guidelines for calibrating strain and load rates in a universal testing machine. It ensures that the machine accurately measures the applied load and strain rate during mechanical testing, essential for evaluating material properties such as stiffness, strength, and ductility.
  
  
• ASTM E4: ASTM E4 outlines the standard practices for calibrating the tension and compression capabilities of a universal testing machine. It covers procedures for verifying the accuracy of force measurements across the full range of the machine's capacity, ensuring consistent and reliable test results for various materials and applications.
  
  
• ASTM E2624: This standard addresses the calibration of torque measurement devices used in materials testing machines. It provides procedures for verifying the accuracy of torque sensors and transducers, ensuring precise measurement of rotational forces during testing, particularly relevant for materials with mechanical properties influenced by torsional stress.
  
  
• ASTM E467: ASTM E467 specifies the procedure for calibrating dynamic force measurement devices in materials testing machines. It ensures the accuracy of force measurements under dynamic loading conditions, critical for evaluating materials' response to impact, vibration, or cyclic loading, commonly encountered in fatigue testing and dynamic mechanical analysis.
  
  

These ASTM standards provide comprehensive guidelines for calibrating different aspects of universal testing machines, ensuring accurate and reliable measurement of mechanical properties across various materials and testing conditions.

Annual calibration is recommended to maintain measurement accuracy, with certificates typically expiring after one year. Regular review of calibration certificates is advised to detect deviations in accuracy. Additional calibrations may be necessary after system relocation or based on industry-specific regulations.

Calibration procedures for universal testing machines follow internationally recognized standards such as ASTM and ISO standards. Technicians utilize portable calibration units to calibrate UTM measurement devices against traceable standards like NIST. Procedures adhere to ASTM and ISO standards, with reference points checked for accuracy. Adjustments are made manually if errors exceed 1%, ensuring measurements align with calibrated devices.