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Measurement Traceability

The calibrations and measurements made by SCL are metrologically traceable to the International System of Units (SI).

SCL has set up primary measurement standards in some of its measurement fields. Primary measurement standards may be primary realisations of the SI units or agreed representations of the SI units based on fundamental physical constants. These primary measurement standards provide the ultimate metrological traceability to the SI for the reference measurement standards and measuring equipment used by SCL in the respective fields.

For measurement fields where primary measurement standards have not yet been set up, SCL sends the appropriate reference measurement standards to overseas primary measurement standards laboratories of recognised international repute and authority, such as NPL of UK, NIST of USA, PTB of Germany, for regular recalibration in order to provide traceability to the SI. In a few special cases, reference measurement standards derive metrological traceability through other overseas accredited calibration laboratories.

To ensure that the measurement standards established in SCL are in harmony with those established elsewhere, SCL participates in inter-laboratory comparisons of measurement standards whenever opportunity arises.

Details on metrological traceability of SCL's measurements in various fields are available.

  1. Direct Current, High Voltage and Magnetism Measurement
    DC Voltage
    DC Resistance
    DC Current
    DC High Voltage
    Magnetism
  2. Low Frequency Electrical Measurement
    AC Voltage
    AC Current
    Power and Energy
    Capacitance
    Inductance
    AC Voltage Ratio
    Phase and Power Factor
    LCR Meter
    Withstanding Voltage Tester
    AC High Voltage
    Distortion
    Digital Multimeter
    Harmonics
    Flicker
    Octave Filter
  3. Radio Frequency Electrical Measurement
    Time and Frequency
    RF Power and Voltage
    RF Attenuation
    RF Impedance
  4. Acoustics Measurement
    Laboratory Standard Microphone
    Working Microphone
    Sound Calibrator
    Sound Level Meter
    Audiometer
    Measuring Amplifier
    Microphone Preamplifier
    Type 1 ear simulator
    Audio network analyzer
    Type 3.2 ear simulator
    Personal sound exposure meter
  5. Temperature Measurement
  6. Humidity Measurement
  7. Dimensional Metrology
    Laser Frequency
    Length
    Flatness
    Angle
    Squareness
    Roundness
    Surface Texture
  8. Mass and Related Metrology
    Mass
    Volume
    Density
    Pressure
    Torque
    Hardness
    Rotational Speed
  9. Force Measurement
    Using Deadweight Force Standard Machine
    Using Hydraulic Force Standard Machine

 

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