Vibration Laboratory has developed high accuracy capability to support national vibration and shock measurement activities. The chart illustrates the traceability for vibration measurement in Malaysia.

	The highest reference standard established is laboratory standard accelerometer B&K 8305 that is maintained using Laser Interferometry Calibration System. The frequency range is from 5 Hz to 10 kHz with the best uncertainty of 0.4%.
Reference standard accelerometer B&K 8305

 

NMIM’s Time and Frequency laboratory maintains two high performance and three standard performance Caesium (Cs) atomic reference frequency standards. One of the high performance Cs reference frequency standards is designated as Malaysian National Frequency Standards (MNFS), with accuracy of ± 5 × 10-13 s .

 With these standards and continuous All-in-View GPS time comparisons, where the data is contributed to Bureau Weights and Measures (BIPM) for the generation of the International Atomic Time (TAT) scale. NMIM is capable to provide traceability to the SI Unit of time interval for time and frequency measurement.

 Malaysian Standard Time (MST) is UTC (NMLS) + 8 Hours, due to the time zone selected which is the longitude of 1200 East. UTC (NMLS) is currently defined to be the epoch of the 1 pulse per second timing signal output at the rear panel of the Malaysian National Frequency Standards. NMIM steers the frequency of the standard to maintain UTC(NMLS) to be within approximately 1 ms of the Coordinated Universal Time (UTC).

AC & Low Frequency Laboratory are capable to generate and measure DC to 10 MHz and beyond covering voltage, current, and resistance parameters to support national AC & Low Frequency measurement activities. The chart illustrates the traceability for AC & Low Frequency in Malaysia.

The highest standards are primary Thermal Converters and AC DC Shunts maintained by utilizing comparison method of AC-DC. Different comparison methods for accurate RMS value determination of AC Voltage and AC Current at low frequencies are traceable to the national standard of AC Voltage and Current. The frequency range is from 10 Hz to 1 MHz with best uncertainty of 5 uV/V. 

Thermal Converter	Reference Multimeter

Acoustic Laboratory has developed high accuracy capability to support national acoustics measurement activities. The chart illustrates the traceability for acoustics measurement in Malaysia.

The highest standards are 1-inch laboratory standard microphone (LS1P) and ½-inch laboratory standard microphone (LS2P) that are maintained using Reciprocity Calibration System. The frequency range is from 20 Hz to 25 kHz with the best uncertainty of 0.04 dB at 1 kHz. 

 

 

   

<--- 1-inch and ½-inch laboratory standard microphone