Time and Frequency Measurements

      Time and frequency measurement management laboratories, are concerned with creating and maintaining initial measurement standards for measuring time and frequency. High Time measurement accuracy is an important national requirement in many applications, especially military, transport and communications. The Department's laboratories provide calibration services to factories and the military, health and civilian sectors in its various levels to cover the basic needs in time measurements that serves the Kingdom of Saudi Arabia. The department consists of four laboratories: Time and Frequency Laboratory, High Frequency and Microwave Laboratory, Vibration Laboratory, and Acoustics Laboratory.

​​​


      It is recognized for establishing and preserving the national standard, for time measuring and frequency to achieve metrological attribution of measurement results. It is also responsible for transmitting the national time to various beneficiaries in KSA. Time and frequency laboratory has the modern capabilities and equipment, which is necessary to measure the period, frequency, rotation speed and frequency spectrum. The laboratory provides calibration services to various sectors in the Kingdom, such as the armed forces, telecommunications companies, hospitals, and governmental and private institutions. This is done by calibrating stopwatches, spectrum analyzers, rotational speed measuring device, signal generators, cesium and rubidium counter and clocks, The laboratory has the following measurements: 


Measurement and calibration capabilities:​

Calibration and Measurem​ent Capability (CMC)، k=2RangeQuantity measured / Calibrated Instrument

1.0x10-12 – 1.0x10-15Frequency Offset of UTC(National Metrology Institute (NMI))

(100, 10, 1) PPS,

1 Hz ≤ f ≤ 200 MHz

Frequency Accuracy

Atomic Time and Frequency Standard

Quartz Frequency Standard Oscillators

0.1 Hz  ≤ f ≤ 50 GHz
Frequency  Measurement
5 ps + 10-4 · t15 ns ≤ t ≤  1010 s
Time Interval
 s
1 s ≤ t ≤  1010 s

Time Interval

Stopwatch

1.1 dB
-170 dB ≤ (f) ≤ -50 dB

Phase Noise

Signal Generator


6 fpm ≤ ω ≤  6·109 fpm

Frequency  Measurement

Stroboscope


6 rpm ≤ ω ≤  500000 rpm

Frequency  Generation

Optical Tachometer


1.0x10-12 – 1.0x10-15Frequency Offset of UTC(National Metrology Institute (NMI))

(100, 10, 1) PPS,

1 Hz ≤ f ≤ 200 MHz

Frequency Accuracy

Atomic Time and Frequency Standard

Quartz Frequency Standard Oscillators


0.1 Hz  ≤ f ≤ 50 GHz
Frequency  Measurement
5 ps + 10-4 · t15 ns ≤ t ≤  1010 s
Time Interval​

      The laboratory creates, maintains and develops national measurement standards to achieve attribution in the field of acoustics measurements. I It is the first reference laboratory of its kind in the Gulf region. The laboratory provides calibration services for all sectors, industrial, military and civil, especially that the General Organization of Meteorology and Environmental Protection is concerned to set regulations that determine the permissible rates of acoustic noise pollution in open and closed areas (hospitals, schools, residential buildings, markets, etc.) According to WHO requirements, examples of devices that the laboratory calibrates are all reference microphones for acoustics measurements (LS1p, LS2p). According to WHO requirements. One of the examples is the devices that the laboratory calibrates are all reference microphones for acoustics measurements (LS1p, LS2p). Secondary (WS1,2,3p) And sound level meters and acoustic noise, Sound Exposure Meters, and Standard devices that are used to check the efficiency of sound meters.
The laboratory has the following measurement capabilities:

Measurement and calibration capabilities:​

Calibration ​and Measurement Capability (CMC)، k=2RangeQuantity measured / Calibrated Instrument

Pressure Sensitivity Level (Magnitude & Phase)

2 Hz – 10 kHz

2 Hz - 10 kHz
1" Laboratory Standard Microphone

Pressure Sensitivity Level (Magnitude & Phase)

2 Hz – 25 kHz

2 Hz - 25 kHz
1/2" Laboratory Standard Microphone
Microphone Sensitivity @ 250 Hz or @1 kHz
@ 250 Hz or @1 kHz
Condenser Microphone LS2p

Frequency Response by Comparison

20 Hz – 20 kHz

20 Hz – 20 kHz
Condenser Microphone WS2p

Frequency Response by Comparison

10 Hz – 100 kHz

10 Hz – 100 kHz
Condenser Microphone WS3p

10 Hz –

25 kHz

250 Hz or 1 kHz، 94 dB، 104 dB، 114 dB، 124 dB
Sound Calibrator

10 Hz -

25 kHz

31،5 Hz - 16 kHz، 94 dB، 104 dB، 114 dB
Multifunction Acoustical Calibrator

2 Hz –

25 kHz

2 Hz –

25 kHz

Sound Level Meter

20 Hz –

20 kHz

20 Hz –

20 kHz

Noise Dose Meter​

      The primary mission of this laboratory is to establish, develop and maintain Saudi national standards, to achieve attribution in the field of power measurements in high frequencies and the field of measuring dispersion coefficients using a directional network analyzer.
The laboratory contains modern equipment and requirements for measuring the calibration factor of the power sensors, and measure the power at high frequencies and measure the, measure the reflection factor and the diffusion coefficient. The laboratory also provides calibration services to various entities such as the armed forces and telecommunications companies by calibrating power sensors, meters, attenuators, and power amplifiers, microwave signal filters, power dividers, antennas, cable and antennas analyzers, directional comparators, calibration kits, and directional network analyzers. And the laboratory has measurement capabilities as follows

Measurement and calibration capabilities:​

Calib​ration and Measurement Capability (CMC)، k=2RangeQuantity measured / Calibrated Instrument
9 to 60 mW/W

Freq: 100 kHz – 50 GHz

Connector:

type N، 3.5 mm، 2.4mm

RF Power
7 to 50 mW /W

Freq: 100 kHz – 50 GHz

Power: 1 mW

Connector:

type N، 3.5 mm، 2.4 mm

Calibration Factor
0.005 to 0.035

Freq: 9 kHz – 50 GHz

Connector:

type N، 3.5 mm، 2.4 mm

Reflection Coefficient
0.0002 to 0.0015

Freq: 9 kHz – 50 GHz

Connector:

type N، 3.5 mm، 2.4 mm

Transmission Coefficient

      It Establishes, maintains and develops national standards to achieve attribution in the field of vibration measurements. It is the first reference laboratory of its kind in the Gulf region. The laboratory has the latest version of the measurement standards that rely on calculating vibrations using interfering lasers to calculate the displacement caused by vibration.

      The laboratory also provides calibration services to all industrial, military and civil sectors, especially the General Organization of Meteorology and Environmental Protection is concerned with setting regulations that determine the permissible rates of vibration noise pollution, especially in the industrial work environment, production lines, bridges and railways. According to WHO, the laboratory calibrates all types of vibration level meters (reference sensors), vibration meters and vibration exciter devices, and has the following measurement capabilities:

Measurement and calibration capabilities:​

Calibration and​ Measurement Capability (CMC)، k=2RangeQuantity measured / Calibrated Instrument

Sensor with mass up to 200 gram
Nominal at 50 m/s2

5 Hz to 10 kHz

5 Hz –

10 kHz


Laboratory Standard Accelerometer

Sensor with mass up to 200 gram
Nominal at 50 m/s2

5 Hz to 10 kHz

1 Hz –

20 kHz


Vibration Measuring Chain

Sensor with mass up to 200 gram
Nominal at 50 m/s2

5 Hz to 10 kHz

5 Hz –

10 kHz


Accelerometer

5 Hz to 10 kHz

5 Hz –

10 kHz


Vibration Exciter

5 Hz to 10 kHz

5 Hz –

10 kHz


Vibration Meter

5 Hz to 10 kHz​

5 Hz –

10 kHz


Conditioning Amplifier

5 Hz to 10 kHz

5 Hz –

10 kHz


Vibration Measurement



Last modified 01 Oct 2020
Rate content
Rating count: 1