PT ratio programmable; Digital display, LCD, LED; CE mark Size: 72x72mm, 80x80mm, 96x96mm, 120x120mm 1.Generalvoltmeter ... 1min (RMS) power / Input / output - Temperature: Operation: LCD: -10C ~ +45C; LED: -10C ~ +55C; Storage: -20C ~ +70C- Humidity: < 93%RH, no condensation ... the delay can be programmable. - Digital options(/K): 2DI/2DO; DI: dry contact Input, supplied inside, optoisolator; DO: NO-NC ...