General Radio 1633A

The 1633A Incremental-Inductance Bridge is designed primarily for measuring inductance and loss of transformers, chokes, and similar components at very high levels of AC and DC excitation. Easy to operate and flexible in applications, it can also measure other nonlinear elements such as Zener diodes, rectifiers, thermistors, and lamps. Direct reading at nine frequencies in series L and R or Q. Measures inductance from 0.2 ?H to 1000 H over the frequency range of 20Hz to 20kHz, accuracy of ?1%. Can apply up to 1250 V and 50 A, AC and DC.

General Radio 1633A datasheet & specifications