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 Electrical Time Frequency Lab

The laboratory realizes the units of time (s) and frequency (Hz) through quantum phenomena using three primary standard Cesium clocks. The Laboratory maintains and disseminates the national time scale, UTC (UAE). The laboratory aligns the national time scale to the international time scale, Coordinated Universal Time (UTC), through regular time comparisons with a global network of national time standard laboratories, using the Global Positioning System (GPS).

Time and frequency calibrations are offered as follows:​

  • Local frequency standards in the range 1 MHz to 30 MHz with relative expanded uncertainty of 2.6 parts in 1012.
  • Frequency Counters in the range 100 Hz to 350 MHz with relative expanded uncertainties of 3 parts in 1012 to 3 parts in 1010.​
  • Stopwatches and clocks with expanded uncertainties of less than 1 second in 24 hours.
  • The Laboratory maintains the national standards of capacitance, inductance, resistance, voltage and AC/DC transfer. Measurement
    traceability is to the Czech, Swiss or UK national standards.

Reference standard resistors and resistance bridges are used to scale the resistances from 100 mΩ to 1 GΩ. Calibrations of standard resistors are offered as follows:​


Range CMC
100 mΩ...10 kΩ 0.43 to 0.57 ppm
100 kΩ... 1 MΩ 3 to 6 ppm
10 MΩ... 100 MΩ 10 to 20 ppm
1 GΩ 200 ppm​


DC voltage calibration is based on the value of a group of calibrated 10 V precision Zener references, with allowance being made for the drift of the references in the group. Calibrations at other voltages are achieved using voltage dividers in the range from 1 mV to 1 kV.

Calibrations of Zener reference standards are offered as follows:


Range CMC
1 V... 10 V 7.3 μV


The laboratory can also calibrate Digital multi-meters, Oscilloscopes and Temperature Indicators by simulation.