main feature:

　　1. Large screen, multi-parameter highlight, Chinese/English operation and display (simultaneous display of current PH value, temperature, output current)

　　2. Imported chips and components to ensure the long-term stable and reliable operation of the instrument. One key to restore factory settings;

　　3. EEPROM type memory, no backup battery is needed, and data will not be lost after power off;

　　4. High-performance operational amplifier, ORP positive and negative values ​​are symmetrical, temperature drift is small, stable and accurate;

　　5. It has dual functions of pH/ORP, and the two functions can be interchanged without disconnecting the power supply;

　　6. With alarm display and control signal output function, high and low point control wide amplitude independent setting

　　7. With automatic calibration (simultaneous calibration of three sets of standard solutions), automatic/manual temperature compensation functions;

　　8. Isolation protection of photoelectric coupler, transferable 4～20mA signal output, no interference between input signal and output signal (485 interface is optional);

　　Technical Parameters:

　　1. Measuring range: 0.00～14.00pH; -1999～+1999mV

　　2. Resolution: 0.01pH; 1mV

　　3. Accuracy: 0.05 level

　　4. Stability: ≤0.03pH/24h; ≤2mV/24h

　　5. pH standard solution: 4.00/6.86/9.18

　　6. Temperature compensation: 0~99.9℃(pH)

　　7. pH calibration range: zero point ±1.45 pH; slope ±30%

　　8. Action control: two sets of ON/OFF relays

　　9. Relay hysteresis: automatic setting

　　10. Signal isolation output: 4～20mA isolation protection output

　　11. Ambient temperature: 5~45℃

　　12. Signal input impedance: ≥1×1013W

　　13.Current output load: the maximum allowable load is 500W

　　14. Voltage insulation to ground: the minimum load is 500VD

　　15. Working voltage: 220VAC±10%, 50/60Hz

　　16. Size: 96×96×120mm

　　17.Dashboard opening size 92×92 mm

　　18. Protection level: IP64

　　19. Weight: 0.9 kg

　　Application scope:

　　It is widely used in chemical reactor and boiler water, thermal power exhaust gas desulfurization control, metallurgical electroplating process and its wastewater detection control, environmental protection sewage discharge monitoring, pharmaceutical paper production process and chemistry, food, medical treatment, sanitation, thermal power, papermaking, biological engineering, fermentation Technology, textile printing and dyeing, petrochemical industry and other industries.