Universal Testing Machine (UTM)
Calibrate Universal Testing Machines to ISO 7500-1 for materials property testing.
Standards
ISO 7500-1, ASTM E4, ISO/IEC 17025
Typical Interval
12 months
Uncertainty Range
±1% of reading
What Is Universal Testing Machine (UTM)?
UTMs test tensile strength, compressive strength, and elongation of materials. ISO 7500-1 calibration classifies the machine (Class 1, 2, or 0.5) by verifying force accuracy at multiple points across the load cell range.
Applicable Standards
Primary standards: ISO 7500-1, ASTM E4, ISO/IEC 17025
ISO/IEC 17025-accredited laboratories must maintain an unbroken traceability chain from the calibration result back to NIMT (Thailand's national metrology institute) or another internationally recognised NMI.
Typical Measurement Uncertainty
Expanded uncertainty is typically ±1% of reading, depending on the measurement range, reference equipment used, and environmental conditions. The actual uncertainty will be stated on your calibration certificate.
Recommended Calibration Interval
A calibration interval of 12 months is generally recommended. The appropriate interval for your specific instrument depends on usage frequency, environmental exposure, and any applicable regulatory or customer requirements.
What Your Calibration Certificate Will Include
- Calibration results — instrument indication vs. reference value at each test point
- Error and expanded uncertainty (U) at k=2 (95% confidence level)
- Traceability chain to NIMT or a recognised NMI
- Environmental conditions during calibration (temperature, humidity)
- Calibration date, certificate number, and authorised signature
Find a Universal Testing Machine (UTM) Calibration Lab in Thailand
ThaiLabHub lists ISO 17025-accredited calibration laboratories across Thailand. Search our directory to find labs that offer universal testing machine (utm) services, with scope details, location, and contact information.
For Labs: Manage Universal Testing Machine (UTM) Jobs with LabSync
LabSync helps Thai calibration laboratories manage jobs, issue traceable certificates, calculate GUM uncertainty budgets, and generate Thai tax reports (PP30 + WHT) — all in one system.
Frequently Asked Questions
Why is it important to calibrate a Universal Testing Machine (UTM)?+
Weight and force measurements affect product quality, legal trade, and structural safety. An uncalibrated Universal Testing Machine (UTM) can accumulate bias across thousands of measurements. Calibration corrects systematic error to within ±1% of reading per ISO 7500-1, ASTM E4, ISO/IEC 17025.
How often should a Universal Testing Machine (UTM) be calibrated?+
Most Universal Testing Machine (UTM)s should be calibrated every 12 months under normal operating conditions. High-use environments, harsh conditions (vibration, temperature extremes), or regulatory requirements (FDA, GMP, ISO 17025) may necessitate more frequent calibration. Always follow the manufacturer's recommended interval as a baseline and consult your lab's quality plan.
What does a Universal Testing Machine (UTM) calibration certificate show?+
A calibration certificate issued under ISO/IEC 17025 includes: the instrument identification (make, model, serial number), the reference standards used (with their own traceability chain), the measurement points tested, before/after correction values, the expanded measurement uncertainty (±1% of reading), the environmental conditions during calibration, the calibration date and next-due date, and the signature of the authorized calibration engineer. This certificate is the evidence required for audits and accreditation.
Related Calibration Services
Manage calibration with LabSync
Track instruments, schedule calibrations, and generate ISO 17025-ready certificates automatically.