A new transistorized logaritnmic counting rate meter has been developed. It was designed for using in the start up region of nuclear reactor.
The experimental data of this device are given as follows:
(1) Counting region: 0.3 cps30 kcps
(2) Accuracy: ±0.1 decades
(3) Pules resolution: Better than 1μsec
(4) Discri. level: -0.1 V pp-10 V pp
(5) Stability: Better than ±0.05 decades for ±15% change of line voltage and better than ±0.1 decades 0°40°C change of room temperature
(6) Drift: ±0.1 decades/8hr.
