This manual provides detailed instructions on how to use the MODEL 6309POT microprocessor pH/ORP/temperature controller, display modes, relay control, 4-20 mA isolated current output, RS485 interface use, error display and troubleshooting methods, pH calibration liquid and temperature relationship table and other content.
The 6309POT is a micro‑computer based controller that measures pH, ORP and temperature, displays the values on a 128x64 LCD and offers programmable relay outputs and a 4‑20 mA isolated current loop. It is housed in a ¼ DIN waterproof enclosure and can be powered from 115 VAC or 230 VAC.
This manual covers product inspection, mounting, wiring diagrams, power‑up self‑check, normal and calibration/display modes, relay control settings, RS‑485 communication, troubleshooting, calibration‑solution tables and full technical specifications. This manual is written in Chinese.
| pH measurement range | -2.00 to 16.00 pH |
|---|---|
| pH accuracy | ±0.01 pH |
| pH resolution | 0.01 pH |
| ORP range | -2500 to 2500 mV |
| ORP accuracy | ±0.1 % of span |
| Temperature measurement range | -10.0 to 120.0 ℃ |
| Isolated current output range | 4 to 20 mA |
| Maximum load for 4‑20 mA output | 500 Ω |
| Current accuracy | ±0.02 mA |
| Isolation voltage | 500 VDC |
In normal display mode, press and hold the [CAL/VIEW] key for two seconds to enter calibration mode.
The 4‑20 mA output can drive a load up to 500 Ω.
Settings are locked by a four‑digit password; without the correct code the parameters can only be viewed, not changed.