The Dahua DH1722A is a single‑output regulated voltage/current power supply; this manual covers its features, operation, maintenance and specifications.
The DH1722A is a single‑channel regulated voltage‑current power supply with a digital panel display. It provides automatic CV/CC conversion, high‑precision output, and includes over‑voltage and short‑circuit protection.
The manual describes the product’s working characteristics, structural features, operating principle, set‑up, usage and maintenance procedures, as well as storage, warranty information and technical specifications. This manual is written in Chinese.
| Model variants and output ratings | DH1722A‑1 70 V / 5 A, DH1722A‑2 110 V / 3 A, DH1722A‑3 160 V / 2 A, DH1722A‑4 250 V / 1.2 A, DH1722A‑5 330 V / 0.8 A, DH1722A‑6 1000 V / 0.3 A |
|---|---|
| Input voltage | 220 V ±10 % 50 Hz ±5 % |
| Power consumption (rated load) | ≤ 450 VA (low) / ≤ 650 VA (high) |
| Output voltage range | 0 ~ 70 V, 0 ~ 110 V, 0 ~ 160 V, 0 ~ 250 V, 0 ~ 330 V, 0 ~ 1000 V |
| Output current range | 0 ~ 5 A, 0 ~ 3 A, 0 ~ 2 A, 0 ~ 1.2 A, 0 ~ 0.8 A, 0 ~ 0.3 A |
| Ripple and noise | 3 mV rms (low) – 10 mV rms (high) over 5 Hz‑1 MHz |
| Temperature coefficient | 5 × 10⁻⁴ / °C (typical) |
| Weight | ≤ 18 kg |
| Dimensions (W × H × L) | 205 mm × 160 mm × 500 mm |
| MTBF | ≥ 5000 h |
| Storage temperature | 5 ~ 45 °C |
The power supply operates from a 220 V AC mains source with a tolerance of ±10 % at 50 Hz ±5 %.
It includes preset over‑voltage protection and instantaneous short‑circuit protection, as well as over‑heat protection that shuts down the output when the temperature exceeds 100 °C.
Store the instrument at temperatures between 5 °C and 45 °C with relative humidity of 20 % to 90 % RH.