Capacitance Calibration - Capacitance Standards and Service

IET Labs is a premier calibration laboratory that is accredited by A2LA for Capacitance-Measure and Capacitance-Generate.


We can calibrate most capacitance standards or capacitance decades from 10 aF - 10 F with some of the best measurement uncertainties, as good as 4.8 µF/F , of any commercial calibration laboratory.


Please contact our sales staff, by phone or online, who will be pleased to give you a quote for the calibration or repair of your equipment.



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IET Labs uses 2 main bridges for Capacitance-Measure, the Andeen-Hagerling AH 2700A Automatic Capacitance Bridge and the IET/GenRad 1620 Capacitance Bridge. These capacitance bridges are both used for capacitance values ≤ 1 µF with a CMC1 down to 4.8 µF/F.

1.) The Andeen-Hagerling AH2700A Automatic Capacitance is used for direct measurements and is calibrated traceable to the SI, through a National Metrology Institute (NIST).

IET Labs can also provide accredited calibration for Dissipation Factor-Measure using the AH2700A.

IET Labs is one of just a few accredited calibration laboratories, for Capacitance-Measure using the Andeen-Hagerling AH2700A. This allows us to calibrate your capacitance standards at various frequencies from 50 Hz to 20 kHz.

2.) The GenRad 1620 Capacitance Bridge is used for both direct and transfer measurements using 1404 capacitance standards that are calibrated traceable to the SI, through a National Metrology Institute mainly NRC in Canada.


IET Labs also maintains an AH2500 Capacitance Bridge for capacitance measurements at 1 kHz.

Calibrations with the AH2700A, AH2500 and 1689/1693 Digibridge are completely automated using our Test Manager Software which configures the instruments and automatically collects the data to reduce errors.



AH2700A Capacitance Bridge



IET Labs also uses the IET/GenRad 1689 and 1693 Digibridges for Capacitance-Measure for capacitance values above 1 µF using direct measurements with a CMC1 down to 0.01% + 16 fF.



Typical Test Station at IET Labs

The table below shows the typical method used during calibration of some of our popular products.



Model  Calibration Method
1403/1404 Capacitance Standards AH2700A Direct Measurement and GenRad/IET 1620 Transfer using Standards
1409 and SCA ≤ 1 µF AH2700A Direct Measurement and GenRad/IET 1620 Transfer using Standards
1409 and SCA > 1 µF IET/GenRad 1689 and 1693 Digibridges using Direct Measurement
HACS/1413 IET/GenRad 1689 and 1693 Digibridges using Direct Measurement


See our New Certificate of Calibration with plots of measurement data and uncertainties, that is delivered with the 1413 and HACS Decade Capacitors.

IET Labs can calibrate or repair any manufacturers capacitance standards2.



2See ISO-17025 Scope of Accreditation (A2LA) for our complete list of accredited calibration capabilities.