Electro-Technical Calibration is the process of verifying and adjusting the accuracy of electrical and electronic measuring instruments to ensure they meet specified standards. This type of calibration is essential in industries where precise electrical measurements are critical, such as electronics manufacturing, aerospace, defense, automotive, power generation, and telecommunications.
Purpose:
Ensure measurement accuracy and traceability to national or international standards (e.g., NIST, NABL).
Maintain compliance with regulatory and quality management systems (e.g., ISO 9001, ISO/IEC 17025).
Reduce measurement errors and improve product quality.
Common Instruments Calibrated:
Multimeters (voltage, current, resistance)
Oscilloscopes
Power supplies
Clamp meters
Function generators
Frequency counters
Insulation testers
Loop calibrators
LCR meters (inductance, capacitance, resistance)
Voltage and current sources
Transformers and power analyzers
Parameters Measured:
Voltage (AC/DC)
Current (AC/DC)
Resistance
Capacitance
Frequency
Power (Watts)
Phase angle
Time intervals
Calibration Standards:
Equipment is calibrated against traceable reference standards with known uncertainties.
Environmental conditions (temperature, humidity, etc.) are controlled and monitored during calibration.
Calibration Certificates:
Include details like:
Instrument serial number
Calibration date and due date
Measured values vs. standard values
Measurement uncertainty
Technician name and lab accreditation
If a digital multimeter reads 5.01 V when a traceable voltage standard outputs 5.00 V, the multimeter has a 0.01 V deviation. Calibration determines whether this is within acceptable tolerance or if adjustment is needed.
Accuracy in production
Reduced downtime and rework
Compliance with industry standards
Improved safety
Customer confidence and product reliability
