CT-6659 PH/ORP controller instruction manual, which details the product's features, technical performance, installation steps, etc.
The Kedida CT-6659 is a micro‑computer industrial controller for measuring solution pH and ORP values. It features LED display, error indication, automatic temperature compensation, three‑point calibration, isolated 4‑20 mA output, dual relays, and memory retention without a backup battery.
The manual provides safety notices, installation steps, front and rear panel descriptions, operation instructions, error troubleshooting, system reset procedure, and warranty information. This manual is written in Chinese.
| Measurement range | pH 0.00‑14.00, ORP ±1999 mV |
|---|---|
| Resolution | 0.01 pH; 1 mV |
| Accuracy | ±0.02 pH; ±1 mV |
| Stability (24 h) | ≤0.02 pH; ≤3 mV |
| Temperature compensation range | 0 ~ 99.9 °C (pH) |
| Output signal | 4 ~ 20 mA isolated output |
| Relay load capacity | AC 230 V 5 A, AC 115 V 10 A |
| Relay hysteresis | Adjustable, independent high/low settings |
| Maximum current‑output load | 500 Ω |
| Ground insulation voltage | ≥500 VDC |
| Operating temperature | 5 ~ 35 °C |
| Relative humidity | ≤80 % |
Check that the power is connected and the fuse is intact; a missing power supply or blown fuse will prevent the display.
The electrode lead may be wet or the electrode ceramic contaminated; clean the ceramic with 0.1 M HCl or replace the electrode if needed.
Check the relay for damage and verify the controller settings; also ensure sufficient dosing solution is available and contact the supplier if needed.