UKAS Accredited Calibration
Accurate volume flow and environmental measurements are critical in air permeability testing to ensure accuracy in test results. Without calibration there can be no confidence in test accuracy.
Accredited calibration of air testing equipment ensures that airflow assessments meet required standards for regulatory compliance and that energy performance can be assessed accurately.
Stroma has a dedicated UKAS accredited calibration laboratory (UKAS no. 4126) in Sheffield that can carry out accredited calibration on the below air permability testing equipment:
Test Fans: From 5.25 l/s to 5000 l/s (0.00525 to 5 m3/s) at fan pressures of 25 Pa to 2000 Pa - BS EN ISO 5801:2017.
Manometers: From -2000 Pa to +2000Pa Range - Methods consistent with EURAMET CG17.
Barometers: 80kPa to 120kPa Range (0.8 to 1.2 Bar) - Methods consistent with EURAMET CG17.
Thermometers: From -35 to +140°C Range - Calibration by comparison with reference instruments in a block bath.
Pt 100 Probes: From -35 to +140°C Range - Calibration by comparison with reference instruments in a block bath.
Services below are not covered by the current scope of our UKAS accreditation, but tested to national standards:
Laser Distance Meters: We also offer calibration of Laser distance meters, up to 29m, unaccredited, but traceable to national standards.
Our Calibration Methods
Blower Door/Air Tightness Fans - BS EN ISO 5801:2017
The fan is attached to a wind chamber, and is used to balance out a flow of air from a large fan. Measured fan pressures are converted into a unit volume of flow per second. A range of pressures are used for the fan in each of several configurations with reducer plates of the clients’ choice.
This gives the correlation values for each configuration that can be entered into testing software. e.g. Fantestic.
Manometers - Methods consistent with EURAMET CG17
Manometers are connected to a high accuracy pressure system and taken through a range of applied pressures. The difference between actual pressure and displayed pressure is recorded.
Barometers - Methods consistent with EURAMET CG17
Barometers are placed in a high accuracy pressure chamber and taken through a range of applied atmospheric pressures. The difference between actual pressure and displayed pressure is recorded.
Thermometers and Pt100 probes - Calibration by comparison with reference instruments in a block bath.
The thermometer probe is placed in a temperature controlled “well” and compared against a reference thermocouple.
Laser Distance Meters - Our calibration is traceable to national standards.
Laser distance meters are placed in brackets and directed at various specific targets of measured distance, ranging from 1m to 29m, and comparisons between the laser measurement and actual distances are made.
Working with Stroma
As air testers ourselves, we recognise that having your expensive equipment in the calibration laboratory for a long time can be costly to your business in lost work.
For this reason, unlike other labs, where your equipment languishes in a queue, we use a “just in time” scheduling system. We will agree a calibration date with you, and arrange for the equipment to arrive at the lab at least a day before it is due. We then calibrate it and send it straight back.
This means it may be out of your hands typically for about five working days, sometimes even less. You can then get it straight back into service, making money! This is a standard service, there’s no extra cost for fast turnaround!
To get a quote or find out more about the calibration services we provide, just complete a short form and we’ll be in touch.