CMS has established national measurement standards in the fields of electricity, magnetics, microwave, luminous intensity, temperature, humidity, chemistry, vibration, acoustics, dimension, mass, force, pressure, vacuum, and flow. Based on the well-established national standards, extensive calibration services are made available to industry.

The National Measurement Laboratory R.O.C. (NML) is one of CMS' main projects. It aims to establish, maintain, and disseminate national measurement standards. Over 110 national standards in 15 fields such as in Dimension, Electricity, Temperature, and Pressure have been established which satisfy domestic demands for primary calibration. For more details, please refer to its website at http://www.nml.org.tw.

The Electrical Measurement Laboratory provides traceability of electrical standards for domestic industry. It has established standards including DC/AC voltages, DC/AC currents, AC power and impedance.

For AC power, the lab has established an AC power primary standard, with single-phase/three-phase power/energy and phase angle automated calibration systems under the control of computers. The testing range covers most of the calibration needs for the electrical power industry.

For impedance, the Quantum Hall Resistance primary standard has been established to provide traceability to our resistance, capacitance, and inductance standards in the lab. All the measuring systems are automatic with a statistical quality control program.

The Electromagnetic Measurement Laboratory has established measurement standards in the areas of magnetism, microwave, and optical radiation. It covers magnetic field and magnetic material measurement in the DC/LF frequency range, electromagnetic parameters measurement in the RF/microwave frequency range, and optical radiation measurement in the spectral range.

In the area of optical radiation measurement, standards of illumunance, total luminance flux, spectroradiometry, colorimetry, and absolute radiometry have been established to provide calibration services.

For magnetic standards, the laboratory has established magnetic flux, nuclear magnetic resonance (NMR) flux density, low magnetic field, and magnetic materials measurement systems to provide calibration services.

In the RF/microwave area, the laboratory provides microwave power, impedance, attenuation, thermal noise, electromagnetic field strength, RF impedance, and antenna calibration service.

Research Projects

Mechanical Measurement

The Mechanical Measurement Laboratory has established mass, force, pressure and vacuum standards. For the mass standard, the primary mass standard, Pt-Ir kilogram prototype, has been set up to provide weight calibration services. The force laboratory offers calibration services for several types of force transducers. In the vacuum region, the laboratory provides calibration services for a variety of vacuum gages. The pressure laboratory has established the mercury manometer system, which can calibrate different types of pressure standards.

Technical Services

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Dimensional Measurement

The Dimensional Measurement Laboratory provides traceability of dimensional standards for domestic industry. The laboratory has established a variety of measurement systems categorized as end standard, scale, angle, and topography, used for the calibration of laser frequency and dimension related artifact standards. The laboratory provides calibration services for laser frequency, gauge blocks, ring gauges, plug gauges, linear scales, roundness, roughness, standard tapes, theodolites, electronic distance measuring instruments, etc.

The relevant research is divided into four major areas: optical frequency standard, nanometer (10^-9m) range measuring techniques, micrometer (10^-6m) range measuring techniques, and large scale (>1 m) measuring techniques.

Vibration and Acoustics Measurement

The Vibration and Acoustics Laboratory has established measurement systems for vibration and shock standards to provide calibration for vibration sensors, vibration meters, and vibration calibrators for industry. In the field of acoustic calibration, the laboratory provides calibration for microphones, sound level meters, sound level calibrator, etc.

Furthermore, the laboratory has conducted several research projects relating to environmental vibration and noise, mechanical vibration and noise, product vibration and noise, traffic noise, floor vibration, slight vibration of machines, sound absorption and reduction, to provide industry with practical services.

Flow Measurement

The Flow Measurement Laboratory has established national flow calibration standards for traceability of industrial flow meters. In the area of liquid flow, the laboratory has established a 40~10,000L/min water flow facility.In addition, calibration systems have been established for low viscosity (2.4~4.5 cSt) and high viscosity (35~150 cSt) oil flow systems for calibration of quick-response oil flow meters.

In the area of gas flow, the laboratory has established a 10,000m3/h high pressure gas flow measurement system for meter calibration up to 70 bar; 6-600L/min and 2sccm~10L/min normal pressure gas flow systems to meet calibration needs from general industrial sectors as well as semi-conductor industry. In addition, a Laser Doppler Velocimetry system and a still developing micro-PIV system are capable of calibration of flow speed sensors and characterization of MEMS micro flow devices.

In recent years, Flow measurement Laboratory has participated actively both in the CIPM and APMP comparison projects. This collaboration and technical interchange has promoted our visibility in the flow measurement community.

Temperature, Humidity, and Chemical Measurement

With regard to temperature standards, the triple point of water cell and the metal freezing point cells have been produced to develop temperature measurement standard which conforms to the international temperature scale.

As regards humidity and moisture standards, two-pressure humidity generator, humidity fixed-point and dew-point measurement systems in the domain of humidity standard have been built up in the laboratory. A timber moisture calibration system, relating to the moisture standard, has also constructed. Recently, the laboratory has been researching a gravimetric in order to obtain self-traceability of humidity. In addition, the low moisture standard has been investigated to meet the calibration requirements of hi-tech industry.

In the area of gas standards, the primary gas standards of SO2, CO, CO2, and NO are maintained by means of permeation and gravimetric methods. Some of the standards are compared with those of NIST/USA. The increase in the number of participating nations for inter-comparison has contributed to international cooperation and technology exchange.