DAkkS calibration

Our calibration laboratory is accredited in accordance with DIN EN ISO/IEC 17025 under registration no. DK-17589-01-00 from the German Accreditation Office (DAkkS).

The measurement quantities are volume and mass flow respectively volume and mass of air and gases as well as the quantities pressure, temperature, relative humidity, and electrical direct voltage, direct current and DC resistance.

TetraTec Instruments is also a member of the corresponding technical committees of the German Calibration Service (DKD) under the auspices of the Physikalisch-Technische Bundesanstalt PTB.

Our service offer for DAkkS calibrations in house and on-site:

Measurement Quantity	Measurement Range	Calibration Standard	Trace- ability
Volume Flow (Air) On-site Mass Flow (Air) On-site	39 ml/h up to 10.000 m³/h 60 ml/h up to 4.700 m³/h 47 mg/h up to 12.000 kg/h 72 mg/h up to 5.640 kg/h	Crit. nozzles, gas meter, LFE Gas meter, LFE Crit. nozzles, gas meter, LFE Gas meter, LFE	PTB
Flow Generation In house (Air) On-Site (Air)	bis 100 Nm³/h compressed air (8 bar) up to 500 / 2000 / 10.000 m³/h vacuum (-600 / -300 / -80 mbar) Medium supply must be provided by customer.
Absolute pressure	14 mbar up to 70 bar	Piston manometer, El. pressure sensor	PTB
Positive pressure Negative pressure	0 up to 70 bar -14 mbar up to -1 bar	Piston manometer, El. pressure sensor	PTB
Temperature	0 up to 90 °C	Resistance thermometer, water bath	DAkkS
Relative humidity	10 up to 95 % r.F.	Dew point mirror, El. humidity sensor	DAkkS
Direct voltage Direct current DC Resistance	0 up to 60 V 0 up to 3 A 0 up to 12 M Ohm	System Multimeter, El. signal meter, Resistance meter, fixed resistor	DAkkS

The flow quantities at on-site calibrations can now beginning with 16.06.2017 also be certified by a DAkkS calibration certificate.

The auxiliary parameter like pressure, temperature, relative humidity as well as electrical quantities (direct voltage, direct current, DC resistance) can be shown at an on-site calibration only in the DAkkS calibration certificate for the flow or have to be certified stand alone only by a factory calibration certificate, if an own calibration certificate is necessary.

For the best possible measurement uncertainties (MU) see annex to the DAkkS accreditation certificate or on request. Depending on the on-site calibration conditions in temperature, pressure and humidity though has to be added a MU adder.

Other gases than air at DAkkS calibrations on request! In house are more than 12 pure gases and gas mixtures available. 6 pure gases can be used for accredited calibrations.