The Model 1211 Current Preamplifier was designed to provide all of the features required of a modern laboratory preamplifier. It measures currents with full scale sensitivity ranging from 10-2 to 10-12 amperes. With a dynamic range of 96 dB and an output stability better than 0.003% per degrees C or per day, plus a gain stability of 0.05% per degrees C or per day, its performance is hard to match.
The classic analog design provides a clean signal without the high frequency "hash" encountered with microprocessor-based designs employing multiplexed front panel displays.
- 600 ohm, 50 ohm, and zero ohm unity gain (converter) outputs
- 0-5 adjustable detector bias supply
- 100 ppm per degree C stability
- Calibrated current suppresssion of 10-3 to 10-10 amperes in 8 ranges
- Optional battery pack