The Georg Fischer SIGNET 8750-1 pH/ORP transmitter operating manual provides installation, wiring, menu functions, specifications, and troubleshooting guidance.
This manual covers the installation options for the SIGNET 8750-1 transmitter, including panel‑mount and field‑mount procedures, required mounting hardware, and clear wiring instructions for power, sensor inputs, and output loops. Detailed product specifications such as protection rating, power supply, sensor ranges, and environmental limits are listed.
The document also explains menu navigation, calibration (Easy CAL and full CALIBRATE menus) for pH and ORP, option settings like contrast and averaging, and a comprehensive troubleshooting section with error messages and corrective actions. This manual is written in Chinese.
| Protection rating | NEMA 4X / IP65 |
|---|---|
| Enclosure material | PBT |
| Weight | ≈ 325 g (12 oz) |
| Display | LCD 2×16 characters |
| Power supply | 12–24 VDC ± 5 %, max 21 mA |
| pH input range | 0.00–14.00 pH |
| Temperature range | -25 °C to 120 °C |
| ORP input range | -1000 mV to +2000 mV |
| Current output | 4–20 mA (isolated, adjustable) |
| Operating temperature | -10 °C to 70 °C |
| Relative humidity | 0–95 % (no dew point) |
| Certifications | CSA, CE, UL |
The Easy CAL pH procedure uses three standard buffers: 4.0 pH, 7.0 pH, and 10.0 pH.
In the Options menu, set the Contrast value (range 1‑5) to change the LCD contrast.