User manual for the PD19 series digital frequency meters covering safety, installation, operation, settings, troubleshooting and specifications.
The PD19 series digital frequency meters are designed for measuring AC frequency in low‑voltage distribution systems. The manual provides safety precautions, product description, installation and wiring instructions, and detailed operation guidance.
It also includes configuration procedures, Modbus‑RTU communication setup, troubleshooting tips, and a full list of technical specifications such as accuracy, input voltage range, and analog output options. This manual is written in Chinese.
| Accuracy class | 0.2% / 0.5% (default) |
|---|---|
| Display refresh rate | 1 second |
| Input voltage (rated) | AC 100V, 220V, 380V |
| Frequency measurement range | 45 ~ 65 Hz |
| Power supply range | AC 80 ~ 270 V (50/60 Hz), DC 80 ~ 270 V, DC 24 V |
| Analog output current | 4 ~ 20 mA (also 0 ~ 20 mA options) |
| Analog output voltage | 0 ~ 5 V (also 1 ~ 5 V options) |
| Communication interface | RS485, Modbus‑RTU protocol, up to 9600 bps |
| Ingress protection | Front panel IP64, rear housing IP20 |
The default password is 0001.
No, the device must be installed and serviced by qualified personnel.