DC-820 Online pH Analyzer

The DC-820 is our company's new generation of high-end, fully Chinese microprocessor-based instrument. It features full Chinese display, Chinese menu-driven operation, full intelligence, multifunctionality, high measurement performance, and strong environmental adaptability. It can accurately measure the pH value and temperature of solutions and is widely applicable for continuous monitoring of pH values in solutions across industries such as thermal power, chemical fertilizer, metallurgy, environmental protection, pharmaceuticals, biochemistry, food, and tap water.

DC-820 Online pH Analyzer Technical Specifications:
Display Method: Chinese LCD display, Chinese menu-driven operation
Measurement Range: 0–14.00 pH, –1000 to +1000 mV, 0–99.9°C
Temperature Compensation Range: Automatic 0–99.9°C, Manual 0–99.9°C
25°C Conversion: Pure water and ammonia-added ultrapure water 25°C conversion
Resolution: 0.01 pH, 0.1 mV, 0.1°C
Accuracy: ±0.02 pH, ±0.5 mV, ±0.3°C
Input Impedance: >10¹² Ω
Dual Isolated Current Output: Software configurable 0–10 mA (load < 1.5 kΩ) or 4–20 mA (load < 750 Ω)
Alarm Relay: AC220V, 3A, isolated alarm signal output
Communication Interface: Isolated RS485
Power Supply: AC220V±22V, 50Hz±1Hz
Protection Rating: IP65
Operating Conditions: Ambient temperature 0–60°C, relative humidity ≤90%
Data Storage Capacity: 1 month (1 point/5 minutes)
Power-off Storage: >10 years
Weight and Dimensions: 0.8 kg, 146×146×108 mm
Panel Cutout Dimensions: 138×138 mm
Secondary Meter Installation: Panel-mounted/Wall-mounted/Rack-mounted/Pipeline-mounted
Electrode Installation: Flow-through/Submersible/Flange-mounted/Pipeline-mounted/Side-mounted

DC-820 Standard Configuration: One secondary meter, one measurement cell, one electrode,
One packet each of pH (4, 7, 9) standard buffer solutions.

DC-820 Main Features:
Chinese LCD display, Chinese menu-driven operation, Chinese notepad
Microprocessor-based: Utilizes high-performance CPU chip, high-precision AD conversion technology, and SMT mounting technology
Performs multi-parameter measurement, temperature compensation, and self-diagnosis with high accuracy and repeatability.
High Reliability: Single-board structure, touch keys, no switches, knobs, or potentiometers.
Water and Dust Proof Design: IP65 protection rating, suitable for outdoor use.
Electromagnetic Compatibility (EMC/RFI) Design: Manufactured according to European standards EN50081/50082.
25°C Conversion: Nernst electrode slope temperature compensation, pure water and ammonia-added ultrapure water 25°C conversion.
Dual High-Impedance Input Circuit: Low internal resistance pH electrode, ensuring good instrument stability, fast response, and strong anti-interference.
Solution Ground Connection: Eliminates ground loop interference.
Electrode Diagnosis: Multiple calibration methods, E0 and S query, monitoring electrode performance.
Automatic Alarm Function: Isolated alarm signal output, upper and lower alarm limits freely settable, alarm hysteresis cancellation.
Network Function: Isolated current output and RS485 communication interface; current output upper and lower limits corresponding to pH value freely settable.
Industrial Watchdog: Ensures the instrument does not crash.
Historical Curve: Continuously records data for one month, one point every five minutes.
Notepad Function: Records up to 200 entries.
Manual Current Source: Facilitates recording and testing of detection devices.
Built-in Real-Time Clock: Provides time基準(zhǔn) for various functions.
Password Management: Calibration, parameter setting, and maintenance protected by passwords.

DC-820 Ordering Guide:
1. Whether the included electrode is dual combination or triple combination;
2. Electrode cable length; if not specified, 5m is provided by default;
3. If electrode cable length exceeds 20m, pHRT-1 impedance converter should be included;
4. Installation method for the electrode and secondary meter.