Global Organization
2. Capacitance Calibration The precision measurement of capacitors for the purpose of calibration is generally based on a national primary standard of high accuracy, secondary/working Standards derived from it, and a capacitance- (or LCR-) meter used for the measurement (i.e. calibration) of the devices under test (DUT).
Selection and calibration of capacitors for use as Standards is a challenging task, especially since the accuracies required, depening on the application, can be very demanding for the test gear as well as for the secondary- and working-standards used.
The most accurate capacitor calibrations have an uncertainty of ±25 ppm for capacitance and an un- certainty of ±5xlO~* for dissipation factor. For capacitors with large dissipation factors, the dissi- pation factor uncertainty is generally at least ±1% of the measured value ±5X 10~*.
The voltage transformer calibration is of the direct null type, and the capac- itor calibration is of the comparative null type. In other words, the accuracy of the capacitance mea- surements ultimately depends on the uncertainty in assigning a value to a standard capacitor.
With 50+ years of stability data and history, IET Labs manufactures a full line of standard capacitors that will cover most any budget and application. From the world's most stable to our cost-effective models We manufacturer units with a range of 1 pF to 10,000 µF
In our case, the capacitor is connected to the LCR meter via a 0.61 m cable. The calibration interpolation factor, Kc = 0, because all of the measurements are taken at direct calibration frequencies. The cable length factor, Kd = 0.00025(1 + 50fm), for the calibration interpolation factor is given for a cable length of 1 m.
The calibration method uses fused-silica standard capacitors of values 1 pF, 10 pF, and 100 pF that have been characterized for dissipation factor against a 0.5 pF cross capacitor, as well as …
Standard PT/ Standard Capacitor with EPD Upto 1 kV 3 At 50 Hz 13800 9100 For each additional ratio & each additional burden 3 calibration points means 3 percentages of single ratio only i.e. …
EPTIS helps you find a suitable proficiency testing (PT) scheme for your laboratory.
The GenRad 1409 Standard Capacitor series offers highly stable cost-effective capacitance standards with low-temperature coefficient, low losses and a wide range of values. Up to 1 µF, …
dards and Technology (NIST) provides a calibration service for standard capacitors, including both low- and high-voltage devices used in standards laboratories, as well as ... V. DEVICES …
For the idealized parallel plate capacitor, Eqn. 2 can be simpli ed by requiring uniform charge across the capacitor plate areas, and the electric eld maintains a uniform path between plates: …
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 …
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 …
The capacitors of ≤1 μF consist of a silvered-mica and foil pile, spring-held in a heavy-duty metal clamping structure for mechanical stabil-1409 1 μF Standard Capacitor Specifi cations …
Capacitance Calibration - Capacitance Standards and Service . IET Labs is a premier calibration laboratory that is accredited by A2LA for Capacitance-Measure and Capacitance-Generate.. …
Standard PT/ Standard Capacitor with EPD Upto 1 kV 3 At 50 Hz 13800 9100 For each …
The national laboratory standard for capacitance; For calibrating highest level standards; Standard for dissipation factor; 5 year warranty included
calibration is of the direct null type, and the capac- itor calibration is of the comparative null type. In other words, the accuracy of the capacitance mea- surements ultimately depends on the …
Nevertheless, this type of standard capacitor is mainly used within high-voltage halls due to the problem of its external insulation structure, and is therefore not employed in …
NISTSpecialPublication250-47 NISTMEASUREMENTSERVICES: NISTCalibrationServiceforCapacitance StandardsatLowFrequencies …
Offset switch operation for the standard capacitor (STD) and the device under test (DUT) for different capacitance values over the frequency range of interest. ……..9
between the calibration of voltage transformers and capacitors at NIST. The voltage transformer calibration is of the direct null type, and the capac- itor calibration is of the comparative null …
This method is particularly useful for calibrating capacitors with non-standard values. Steps: Measure the capacitance of the DUT using a precise instrument. Replace the DUT with a …
quality of the capacitor. Fig. 1 shows the traceability chain for NIST 3T standard capacitor calibrations of dissipation factor. 100 pF, 10 pF, 1 pF Primary Reference Standards 100 pF, 10 …
A full line of capacitance: standards, decades and bridges. Regardless of your test and measurement application IET Labs has the capacitance solution for your needs.
laboratory working Standards used in our calibration chain are Genrad (GR) air capacitors (type 1403; 1pF to 1000pF; also exhibiting excellent high frequency behaviour), a Genrad GR1615 …
Offset switch operation for the standard capacitor (STD) and the device under test (DUT) for …
laboratory working Standards used in our calibration chain are Genrad (GR) air capacitors …
A full line of capacitance: standards, decades and bridges. Regardless of your test and measurement application IET Labs has the capacitance solution for your needs.