Broad range, high precision, long life cycle, calibration and maintenance free DDS single-phase electronic ... the positive direction 3. Broad range, high precision, long life cycle, calibration and maintenance free 4. Optional display means including ... consumption: Voltage loop: ≤1W, 5VA Current loop: ≤1VA (1b) Life cycle: >15 yearsPulse output: Photoelectric isolation-type output without source ,with ...