- Storage : -55°C ; +85°C

- Operation : -40°C ; +65°C

- Voltage regulation: ± 0.5%.

- Voltage supply/sensing range 85 to 139 V (50/60 Hz)

- Rapid response time (500 ms) for a transient voltage variation amplitude of ± 20%

- Voltage setting P1

- Stability setting P2.

- Power supply protected by 8 A fuse, slow-blow action (tolerates 10 A for 10 s) The fuse is impregnated in the resin, therefore it can not be replaced.

- Frequency: 50 Hz with ST3jumper - 60 Hz without ST3jumper.

- The size of the screwdriver tip used to adjust the potentiometer is 2.5 mm. 2.2 - R220 AVR option Potentiometer for remote voltage adjustment, 1000 Ω / 0.5 W min: adjustment range ± 5%.

- Remove the ST4jumper.