Analytical laboratory, calibration laboratory and scope of accreditation - refrigeration and air conditioning
The PROZON laboratory is divided into two parts: analytical and calibration. The analytical part provides quality control services for virgin refrigerant, refrigerant from an operating plant, and reconditioned refrigerant to determine compliance with AHRI standards. The calibration part deals with the inspection and calibration of the equipment used
In refrigeration.
Services performed in the analytical laboratory:
Extended refrigerant testing:
in accordance with the current AHRI 700 standard ensure high measurement accuracy:
- composition (by gas chromatography) – the test is performed to exclude elevated admixtures and to confirm the appropriate percentage of individual refrigerant components.
- moisture content (by the coulometric method) – the amount of moisture permissible according to the standard
in the refrigerant is 10 ppm. Too high a water content in the refrigerant can lead to ice plugs in the refrigeration system. - Acidity (by alkacimetric titration) – the test involves determining the acid content of the refrigerant in terms of hydrochloric acid (HCl). Acidification of the refrigerant can be caused by burning the compressor.
- Solid and high-boiling residues (evaporation method) – high-boiling residues – oils, solid residues – metals and other impurities. Proper operation of the refrigeration system is ensured, among other things, by the right (adapted to the size of the system) amount of refrigerant, and too much oil in the circuit reduces the efficiency of the system.
- The presence of chlorides (by the precipitation method)-a refrigerant with correct parameters should not contain chlorides, so we test not the chloride content, but their presence.
- content of non-condensable gases (by gas chromatography) – the test involves determining the content of such gases as oxygen, nitrogen, carbon dioxide, argon and carbon monoxide.
Compressor oil testing:
- moisture content (by the coulometric method) – the acceptable value depends on the purpose of the oil. The presence of water in amounts greater than acceptable may indicate that water is entering the oil system from other circuits. Exceeding the moisture content limit causes oil degradation.
- acid number (by potentiometric titration) – acidification of oil is the result of oxidation of its less resistant components, in addition, some oils contain additives of an acidic nature, as a result of the decomposition of which the acid number is reduced. Excessive acidity leads to oil degradation.
- Kinematic viscosity (by viscometric method).
- Determination of elemental content (by atomic emission spectroscopy).
Services performed in the calibration laboratory:
Sensitivity control of portable refrigerant leak detectors
The detector check involves verifying that these devices are able to achieve a given control value of 5g/year of refrigerant leakage. A positive inspection certificate is valid for twelve months from the date of the inspection. The leakage control value and the validity period of such a certificate are specified in Commission Regulation (EC) No. 1516/2007 of December 19, 2007.
Inspection of portable vacuum pumps
For vacuum pumps, it is verified that they are capable of producing a vacuum of 270 Pa or less. Inspection certificates for these devices, unlike detectors, do not have an expiration period, but it is recommended that vacuum pumps be checked regularly to ensure proper performance of the device.
Calibration of non-automatic scales
Calibration of scales allows you to see what measurement error these devices are subject to. This process involves asking specific reference values and comparing the readings of the calibrated device with a higher grade and more accurate standard. The measurement standards available from the PROZON Foundation for Climate Protection are certified under the EA MLA for calibration.
Calibration of analogue and digital vacuometers
Calibration of vacuometers allows to check what measurement error these devices are subject to. This process involves setting specific reference values and comparing the readings of the calibrated device with the standard
Of higher grade and greater accuracy. Measuring standards available
at PROZON Climate Protection Foundation are certified under the EA MLA for calibration.Calibration of analog and digital pressure gauges
Calibration of pressure gauges allows you to see what measurement error these devices have. This process involves setting specific reference values and comparing the readings of the calibrated device with the standard
Of higher grade and greater accuracy. Measuring standards available
at PROZON Climate Protection Foundation are certified under the EA MLA for calibration.
