Calibration Of Dut's - HP 4262A Operating And Service Manual

Model 4262A
—— CALIBRATION OF DUT''S
Section IV
Calibration of DUT's
To minimize the calculation error, the inherent dissipation of the capacitor should
be 0.001 or below. When using polystyrene or silvered mica type capacitors
(dissipation factor is generally very low), the residual factors will not affect the
derivation of accurate dissipation factors. If dissipation of capacitor alone is greater
than 0.001, the effective value of the DUT is calculated in accord with the following
equation:
Ds =Dc + Dr (Dr Dc, Dr € 0.01)
where, Ds is actual dissipation factor of DUT.
Dc is calculated D value (excludes inherent dissipation).
Dr is inherent dissipation of capacitor.
Compensate the dissipation factor for the measuring frequencies of individual
4262A being tested or calibrated. Convert the D value of the calibration frequency
to that of the actual 4262A measuring frequency in accord with the following
equations:
f Dm: D value at 4262A
-m- % = — measuring frequency.
fm Ds: D value at calibration
frequency.
Dm =X-Ds
fm: 4262A measuring
_ fm frequency
—Fw TR fc: Calibration frequency.
Note
To accurately measure frequencies fm and fc,
use a reciprocal counter or calculate reciprocal
number of period.
[CALIBRATION EQUIPMENT]
The recommended model and required performance of calibration equipment is
listed below:
Instrument Required Performance Recommended Model
Capacitance Accuracy: 0.1%
Capacitance Bridge | Dissipation Factor Accuracy: GR 1620-A
0.1% (Resolution 0.0001)
. . HP 3490A
DMM Resistance Accuracy: 0.02% HP 3455A
Reciprocal counter HP 5300A/5307A
Freq. Counter
| Resolution: 0.01Hz
HP 5323A
4-5