This is an operating manual for the +GF+ SIGNET 8750-1 pH/ORP transmitter. It provides detailed instructions on the installation, product specifications, electrical connection, menu functions, etc.
This manual covers the installation of the SIGNET 8750-1 pH/ORP transmitter, including mounting hardware, wiring connections, and power supply requirements. Detailed wiring diagrams show terminal assignments for power, sensor signals, and output loops.
It also describes the device's functional settings, calibration procedures (EASY CAL and manual), display options, and troubleshooting steps for both pH and ORP measurements, with guidance on error conditions such as out‑of‑range readings. This manual is written in Chinese.
| Accuracy | ±0.03 mA at 25 °C, 24 V |
|---|---|
| Weight | 325 g (12 oz) |
| Operating temperature range | -10 °C to 70 °C |
| Relative humidity range | 0 % to 95 % |
| pH measurement range | 0.00 – 14.00 pH |
| ORP measurement range | -1000 mV to +2000 mV |
| Power supply | 12‑24 VDC |
| Ingress protection | NEMA 4, IP65 |
| Housing material | PBT |
| Certifications | CSA, CE, UL |
The transmitter operates from –10 °C to 70 °C.
Check that the correct calibration buffers are used, verify sensor condition, and if the error persists use Manual CAL or replace the sensor.