Metrology services

NTP “TKA” carries out exploratory and applied research, design and development work in various areas of lighting engineering: solving problems of creating measuring instruments for various purposes (from simple lux meters to devices for measuring the color of light sources), consulting on the creation and equipping of testing laboratories at enterprises … Metrology laboratories retain a high scientific and technical potential, consisting of doctors of technical sciences, candidates of sciences and a staff of highly qualified professionally trained specialists.

We will help you in:
– selection of the optimal equipment and devices;
– issues of certification of workplaces;
– metrological and instrumentation support;
– development of existing and development of new measurement techniques;
– performance of research and development work;
– warranty and post-warranty service of the devices supplied by us;
– training the consumer in the skills of working with our devices.

Metrology laboratories NTP “TKA” are equipped with testing equipment and measuring instruments:

  • Photometric balls 1.0  m  and 0.5  m
  • Photometric benches
  • Certified photodiodes 200-1100  nm
  • Standard emitter set
    (incandescent lamps, discharge lamps, light emitting diodes, black body models, diffuse sources)
  • Light-measuring lamps of the SIS and SIP type
  • Stabilized AC and DC Voltage Sources
  • Spectroradiometers and spectrophotometers-colorimeters
  • Luxmeter-Pulsemeter in the rank of a working standard
  • UV radiometers as a working standard
  • Sets of color swatches for transmission and reflection
  • Set of neutral light filters with normalized optical density
  • High-precision picoammeters
  • Spectral Sensitivity Measurements
  • Installations for measuring luminous intensity, brightness, illumination
  • Barometric camera
  • Heat and cold chamber
  • Aerodynamic installation
  • Thermohygrometer, thermoanemometer and barometer in the rank of standards
  • Humidity chamber
  • A set of certified control lamps

A wide range of measurements is carried out promptly in the field of photometric and colorimetric measurements of radiation sources and light devices:

  • Full luminous flux (device sizes up to 200×200 mm)
  • Illumination ripple factor
  • Correlated color temperature
  • Chromaticity coordinates (x, y), (u ‘, v’), (r, g)
  • Color rendering index R a  (General CRI) and extended index R all  (Avarage from all)
  • Color rendering indices CQS, TM-30
  • Dominant wavelength and color purity
  • Relative radiance spectral density distribution (LRD)
  • PAR irradiance  and quantum efficiency of  PPFD  in  µmol / s / m².

Calibration of measuring instruments is a set of operations carried out in order to determine the actual values ​​of the metrological characteristics of these measuring instruments  . Calibration consists in establishing the relationship between the readings of the device and the size of the measured value. Calibration is often understood as the process of adjusting the readings of the output quantity or the indication of the measuring instrument until the moment of agreement between the reference quantity at the input and the result at the output, taking into account the specified accuracy.

Difference between calibration and verification

To calibrate measuring instruments, the same methodological programs and reference samples are used, through which a number of operations are performed to determine the actual values ​​of the metrological characteristics of measuring instruments, in other words, it is established whether the instrument shows accurately or not, including the value of its measurement error.

Calibration is carried out for devices that are not subject to state regulation in the field of ensuring the uniformity of measurements. For example, a user may not verify or calibrate a personal measuring device (at the same time, this is done by the manufacturer in any case). However, if this device is used in production during the technological process, then its mandatory verification is necessary. Another difference between calibration and verification is that legal entities and individual entrepreneurs have the right to perform calibration, but verification is carried out only by organizations that are accredited in the field of ensuring the uniformity of measurements (laboratories).

The result of the calibration of the measuring device is a free-form document, which reflects the information about the device, the results of the calibration and its location, date, signature and any other information. But the result of the verification of the measuring instrument before September 2020 was a verification certificate or a stamp applied to the device. From September 24, 2020, amendments to Federal Law No. 102 “On Ensuring the Uniformity of Measurements” come into force, which establish the priority of electronic registration of verification results. From this it follows that without a type approval certificate (metrological certificate), verification is impossible, but this does not apply to calibration.

Calibration methods

There are the following methods for calibrating measuring instruments:

· Comparison with the standard – direct or by means of a comparator;
· Measurement of quantity – direct or indirect.

Calibration types

There are the following  types of calibration of measuring instruments  :

· Factory;
· Custom.

Factory calibration .

Its features: execution with the help of special equipment; the certificate is issued by qualified personnel and confirms the suitability of the device for official calibration. All our new devices are factory calibrated.

User calibration.

The frequency with which it is carried out is influenced by many factors: the required accuracy of measurements, environmental conditions, etc. It can be carried out both every few hours and every few days using a set of calibration standards from the calibration kit of the measuring device or measures that have been created and defined by the user.