Why is calibration important?

Calibration Laboratory for Exhaust Gas Measurement

HORIBA Europe GmbH with its laboratory for exhaust gas measurement technology in Oberursel, near Frankfurt, carries out calibrations of measuring instruments and sensors for the measurands and measuring ranges specified during accreditation. The DAkkS/DKD calibration certificates issued in accordance with the accreditation are proof of traceability to national standards, such as those required by the DIN EN ISO 9001 and DIN EN ISO/IEC 17025 family of standards.

On a regular basis, the German Accreditation Body (Deutsche Akkreditierungsstelle GmbH (DAkkS)) confirms that the calibration laboratory of HORIBA Europe GmbH with the laboratory for exhaust gas measurement technology in Oberursel (Germany) has the competence according to DIN EN ISO/IEC 17025:2018 to perform accredited calibrations both in the permanent laboratory and on-site at the customer's location.

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On-site calibration

Calibration object	Range		Procedure	Smallest measurement uncertainty that can be specified *)
Pressure
Absolute pressure gauge	0,6…1,1 bar	Gas pressure medium	DKD-R 6.1	±0,68 mbar
Overpressure gauge	0…100 mbar	Gas pressure medium	DKD-R 6.1	0…70 mbar: ±0,06 mbar >70…100 mbar: ±0,18 mbar
Temperature
Resistance thermometers and direct reading thermometers with resistance sensors (Pt100, Pt1000 etc.)	-20…+155 °C	Comparison calibration with resistance thermometer in block calibrators	DKD-R 5.1	-20…<0 °C: ±0,45 K 0…+100 °C: ±0,22 K >+100…+155 °C: ±0,45 K

*) Please note that the smallest measurement uncertainty that can be specified cannot necessarily be realized on every calibration object and may be less favorable in the specific application.

Permanent laboratory

Calibration object	Range		Procedure	Smallest measurement uncertainty that can be specified *)
Pressure
Absolute pressure gauge	0,6…1,1 bar	Gas pressure medium	DKD-R 6.1	±0,68 mbar
Overpressure gauge	0…100 mbar	Gas pressure medium	DKD-R 6.1	0…70 mbar: ±0,06 mbar >70…100 mbar: ±0,18 mbar
Number of particles concentration
Condensation particle counter (CPC)	200…10000 1/cm³	Particle size 23 to 100 nm	ISO 27891	±8,0 %
Particle Number Concentration to determine the Particle Number Concentration Reduction Factor (PCRF)	PCRF 150…3000	VPR Particle size 30 to 100nm PCRF	UNECE R83	±8,77 %
Relative humidity
Comparative measurement in humidity generator Air temperature: 23 °C	10…90 % RH	Comparison calibration with resistance thermometer in block calibrators	DKD-R 5.8	1,7 % RH
Temperature
Resistance thermometers and direct reading thermometers with resistance sensors (Pt100, Pt1000 etc.)	-20…+155 °C	Comparison calibration with resistance thermometer in block calibrators	DKD-R 5.1	-20…<0 °C: ±0,45 K 0…+100 °C: ±0,22 K >+100…+155 °C: ±0,45 K
Resistance thermometers and direct reading thermometers with resistance sensors (Pt100, Pt1000 etc.)	-0…+60 °C	Comparison calibration with resistance thermometer in humidity generator	DKD-R 5.1	0,39 K

*) Please note that the smallest measurement uncertainty that can be specified cannot necessarily be realized on every calibration object and may be less favorable in the specific application.

In the realm of measurement and control technology, achieving the highest possible precision is crucial. Calibration laboratories play a vital role in ensuring the reliability and reproducibility of measurements by calibrating various sensors and measuring instruments. Metrology, the science of measurement, defines calibration as an activity that first establishes a relationship between standard quantity values and their measurement uncertainties and the corresponding indications. This relationship is then used to derive accurate measurement results from these indications.

The calibration of test and measurement systems is essential for maintaining the functionality and accuracy of measuring equipment. In a calibration laboratory, all necessary instruments, machines, and software are organized within an optimized workspace. This environment is meticulously controlled, with stringent standards for temperature and humidity to ensure precise and standardized measurements.

Regular calibration is necessary, varying based on the type and design of the equipment. Additionally, any measuring equipment that has undergone repair or maintenance must be recalibrated to confirm its accuracy. The calibration laboratory, therefore, serves as the central hub where all components and expertise come together to ensure the reliability and precision of measurement equipment.