|Electrostatic Capacity||Measurement Scope||111.1110 pF ~ 1.111110 μF 6digit, decimal, 6dial|
|Resolution ||0.0001 pF (Cs=100 pF) 0.001 pF (Cs=1 nF)|
|Accuracy||Direct reading ±0.01 ~ 0.1 %
Comparison ±0.001 ~ 0.01 %
|Amplification||1 ~ 103|
|Tandelta||Measurement Scope||10-1 ~ 10-5 5digit, decimal, 5 dial
|Accuracy||±10-5 ~ 10-3
|Measurement Current (AC)||Cs: 1 Amax Cx : 1 Amax (Bridge)|
|Measurement frequency||50,60Hz fixed, Within 20 ~ 500Hz
|Arrester||Ceramics, hermetic SI-A230
Surge discharge current 20 KA
|Detecting Amplifier||Gen Rad Type 1232-A or equivalent
|*Standard Condenser||50 ~ 1,000 pF 100 V ~ 700 V
|*Current Transformer||Primary Side : 100 A MAX
Secondary Side : 1 A
*The Products with mark * are subject to voltage, accuracy and material tested, so please contact us when you have inquiries.
When it is needed to compare a standard condenser (Cs) with a condenser to be measured (Cx), a current comparator transformer bridge is used to compare each current flows of Is.
And Ix by connecting them parallel to the power supply (E).
The magnetic flux in steel core of the current comparator become zero and then inductive voltage of detecting coil (N3) become zero at the balanced position because the current comparator is to be balanced at ampere turn as IxN1=IsN2.
At the balanced position, the residual impedance is only consist of coil resistance and it is very little.
Accordingly, the power supply (E) applies high voltage to the condenser almost completely.
The balance of tandelta become possible to be measured the resolution in accuracy 10-6 by flowing the divided current to the paralleled coil (N2) via CD using the residual resistance (R).
By use of magnetic balanced current comparator with detecting coil, the instrument become a high precision current comparator bridge which has a lot of advantages against Schering bridges.