Watson-Marlow 323E, 323S, 323U and 323Du User Manual 9E, S, U, Du 8 Pump specificationsLabels fixed to the rear of the pump contain manufacturer and contact details,product reference number, serial number and model details.Features 323E 323S 323U 323DuManual control • • • •Backlight • • • •Beeper • • • •Manual screen: rpm • • • •15-400 rpm 27:1 speed control •3-400 rpm 133:1 speed control • • •1.5-220 rpm 147:1 speed control • • •5 rpm scrolling increment •1 rpm scrolling increment • • •Auto-restart • • •Keypad lock • • •MemoDose • • •Analogue input: 4-20mA, 0-10V • •Remote stop/start control • •Remote direction control • •RS232 control •313D and 314D pumpheads • • • •501RL and 501RL2 pumpheads • • •314MC and 318MC pumpheads • • •~100-120V/~220-240V operation • • • •IP31 wipe-down case • • • •8.1 Pump features