9125 Transmitter is a microprocessor-based device designed for the continuous measurement and control of conductivity and resistivity in industrial processes (with temperature measurement).
This manual describes the Polymetron 9125 conductivity/resistivity transmitter, its applications in drinking water, wastewater, and industrial process control, and the principles of conductivity measurement. It includes safety warnings, CE compliance information, and an overview of the instrument’s functions and measurement concepts.
The document covers installation, operation, programming, optional modules (relay board, RS‑485 board), maintenance procedures, and a detailed parts list. Technical specifications such as operating temperature, humidity range, power supply options, analog output, and sensor connections are provided. This manual is written in Chinese.
| Operating temperature | -20°C to +60°C |
|---|---|
| Humidity range | 10% to 90% |
| Standard power supply | 100~240 VAC 50/60 Hz |
| Low‑voltage power supply | 13~30 VAC 50/60 Hz, 18~42 VDC 50/60 Hz |
| Analog output | 0–20 mA |
Only Polymetron personnel and their authorized representatives may perform maintenance on the transmitter.
The menu can display six different languages.
Optional modules include a relay board with four relays and an RS‑485 interface board.