High Voltage

The high voltage and high current capabilities in the laboratory are described as follows:

Systems Parameter Capability Range Best Measurement Uncertainty (±)
Impulse high voltage Peak Voltage 50 kV - 500 kV 1.1%
Time 3.90%
AC high voltage AC high voltage 5 kV - 200 kV 0.66%
DC high voltage DC high voltage 5 kV - 150 kV 0.10%
> 150 kV - 270 kV 0.60%
Current Transformer Ratio Error Primary current: 5 A - 2000 A; Secondary current: 5 A 0.05%
Phase displacement 0.8'
Voltage Transformer Ratio Error Primary voltage: 3.3 kV - 11 kV; Secondary voltage: 110 V 0.05%
Phase displacement 0.8'

 

hv1 hv2 hv3

Photometry

p1

Photometry and Radiometry Laboratory has developed high accuracy system to support national illuminance scale. Illuminance scale is one of the fundamentals in the realisation of candela in optical radiation. The chart illustrates the traceability for illuminance parameter measurement in Malaysia. 

p2

Measurement  range is start from 10 to 1000 lux with expanded uncertainty 1.1 %

p3

Reference standard photometer

RF & Microwave

RF power and scattering parameter or S-parameter are the quantity associated with microwave measurements where the services are offered by the laboratory to support national RF and microwave measurements activities. Measurement frequency capability starts from the range of 10 MHz up to 18 GHz. The measurements are limited to Type N and PC7 connectors. The estimated uncertainties for RF power and S-parameter are described as follows:

Parameters

Uncertainty (±)
RF power at 1 mW 2.0 % to 2.4 %
Reflection Coefficient 0.015
Attenuation 0.2 to 3.5 dB

 

rf1rf2rf3

Resistance

Resistance laboratories provide the measurement traceability for resistance as well as development and maintenance of national physical standards for resistance. The laboratories provides calibration measurements with capability  from 1 mΩ to 1 TΩ. The National Standard of Resistance is a 1 Ω and 10 kΩ resistors kept in an oil bath at temperature of 23°C ± 0.001°C. The reference standard resistor is calibrated at BIPM on a regular schedule and disseminate to other resistors by using the automated DCC bridge at range of 1 mΩ to 10 MΩ. Resistance values below 1Ω achieved by using Direct Current Comparator Bridge with a Range Extender. The system has ratios up to 1000:1 with the relative uncertainty of 10-6. The resistance values from above 10 MΩ are scaled up using a modified Wheatstone bridge by replacing Resistive arms with 2 DC Voltage. The resistance laboratories dissemination, capability and uncertainty are shown in following table and diagram respectively. 

        

DC Resistance

:
  • Low range - 1 mΩ to 100 m Ω

  • Medium range - 1 Ω to 10 M Ω

  • High range – 100 MΩ to 1 TΩ

1

Best Measurement Capability

:

    ±0.5 mΩ/Ω to ± 585 mΩ/Ω

                                                            1  Ω standard resistor

DC Current  Shunt

:
  • 1 A to 100 A

 

Best Measurement Capability 

:     ±   5 mA/A to ± 100 mA/A   

2

NMIM Info

NMIM plays an important role in disseminating the traceability of measurement to the whole country based on the International System of Units. Just like other world standard laboratories, NMIM has great responsibility in ensuring the national metrology infrastructures meet and comply with the global measurement standards.

Get In Touch

National Metrology Institute of Malaysia (NMIM)
Lot PT 4803, Bandar Baru Salak Tinggi
43900 Sepang
Selangor Darul Ehsan

Corporate inquiries:  irene@sirim.my , 03-87781605                          

Service inquiries:  serviceNMIM@sirim.my , 03-87781604                               

Complaint and feedback: feedbackNMIM@sirim.my

Training course request: NMIMtraining@sirim.my

WhatsApp: +6018–2121 833