716-C
The General Radio 716-C Capacitance Bridge was introduced in Catalog L (1948) and remained available through Catalog U (1970).
The Type 716-C capacitance bridge uses the Schering bridge circuit and is direct reading at five frequencies (100 Hz, 1 kHz, 10 kHz, and 100 kHz). Dissipation factor is direct-reading at 1 kHz but the usable range is greater, see the manual.
Capacitance measurements can be made by the direct or substitution methods. When using the substitution method, a balancing capacitor is required that is 100 pF greater than the unknown, the Types 505 and 509 are recommended. Inductance and Q of large inductors can be measured by the substitution method.
The 716-C requires a generator and detector, the Types 1310-A or 1311-A oscillators and 1232-A null detector are recommended.
The Type 716-C is the last instrument in 716 series being replaced by the Type 1615-A.
Specifications
- Capacitance Range: Direct method, 100 to 1150 pF; Substitution method 0.1 to 1050 pF
- Accuracy: ±0.1%
- Dissipation Factor Range: 0.00002 to 0.56
- Accuracy: ±2%
- Frequency: 30 Hz to 300 kHz; useful up to 1 MHz with corrections
Links
- Experimenter December 1936 describing Type 716-A
- Experimenter April 1942 describing Type 716-B
- Experimenter April 1947 describing Type 716-C
