★ Features
◆ Intelligence: Uses a single-chip microprocessor to complete residual chlorine measurement;
◆ High-impedance preamplifier: High input impedance, noise-resistant, and strong anti-interference capability;
◆ Multiple calibration methods: Zero calibration, slope calibration, and on-site calibration;
◆ Human-machine interface: Menu-driven operation, allowing users to operate by following on-screen prompts;
◆ Multi-parameter display on one screen: Simultaneously displays residual chlorine value and working status or output current;
◆ Output signal: Software-selectable 0–20 mA, 4–20 mA, or 20–4 mA output;
◆ Measurement range and alarm upper/lower limits are freely settable; over-limit alarms for upper and lower limits;
◆ Two relay control switches with adjustable hysteresis control range;
◆ User-set password: Users can set or change the password to prevent unauthorized personnel from causing operational errors;
