ABB AX460/100010/STD Single and Dual Input pH/Redox (ORP) Analyzer

Description

Technical Specifications

Core Measurement Parameters

• Measurement Type: pH and Redox (ORP)
• pH Measurement Range: -2.00 to 14.00 pH
• ORP Measurement Range: -1200 to +1100 mV
• Temperature Measurement Range: -10.0 to 140.0 °C
• Resolution: 0.01 pH, 1 mV (ORP), 0.1 °C
• Accuracy: ±0.01 pH, ±2 mV (ORP)
• Input Impedance: >1 × 10¹³ Ω (glass/reference electrodes)
• Temperature Compensation: Automatic Nernstian compensation (Pt100, Pt1000, Balco 3K sensors)
• Process Solution Compensation: Configurable coefficient (-0.05 to +0.02%/°C)

Input Configuration

• Input Channels: 1 single-ended or differential pH/ORP input; 1 dedicated temperature input
• Sensor Compatibility: Glass, antimony, metal redox electrodes; solution earth (ground) compatibleABB
• Calibration Modes: Automatic 1/2-point calibration; user-defined buffer tables (DIN, Merck, NIST, US Tech)
• Calibration Stability Check: Built-in auto-stability detection during calibration

Output Interfaces

• Analog Outputs: 2 fully isolated current outputs (standard); configurable 0–10 mA, 0–20 mA, 4–20 mA
• Analog Output Accuracy: ±0.25% FSD, ±0.5% of reading
• Relay Outputs: 3 single-pole changeover relays (standard); 5 relays with option board
• Relay Rating: 5A, 115/230V AC, 5A DC; 2 kV RMS isolation
• Communication: Profibus DP (optional with expansion board)

Control Capabilities

• Control Algorithm: Built-in PID (Proportional-Integral-Derivative) control (standard)
• Control Modes: P, PI, PID; direct/reverse/bi-directional action
• Proportional Band: 0.1–999.9% (configurable)
• Integral Time: 1–7200 s (configurable)
• Derivative Time: 0.1–999.9 s (configurable)
• Control Output Assignment: Up to 2 relays, 2 analog outputs, or combination

Physical & Environmental Specifications

• Mounting Options: Panel-mount (IP66 front), wall-mount, pipe-mount (IP66/NEMA 4X)ABB
• Panel-Mount Dimensions: 96 mm × 96 mm × 162 mm (W×H×D)
• Wall-Mount Dimensions: 192 mm × 230 mm × 94 mm (H×W×D)
• Weight: 0.6 kg (panel-mount); 1.0 kg (wall-mount)
• Power Supply: 85–265 V AC (50/60 Hz); optional 24 V AC / 12–30 V DC
• Power Consumption: <10 VA
• Operating Temperature: -20°C to +65°C
• Storage Temperature: -25°C to +75°C
• Relative Humidity: 5–95% RH (non-condensing)
• EMC Compliance: EN 61326, EN 50081-2, EN 50082-2
• Safety Standards: EN 61010-1; Overvoltage Class II

Display & User Interface

• Display Type: Dual 5-digit, 7-segment backlit LCD
• Backlight: Configurable ON/Auto-Off (60s timeout)
• Keypad: 5 tactile membrane keys; 4-digit security code for parameter protection
• Languages: English, French, German, Italian, Spanish (configurable)

Functional Features

1. High-Precision Measurement & Stability

• Ultra-High Input Impedance: Ensures accurate signal acquisition from high-impedance pH/ORP electrodes, minimizing measurement drift.
• Differential Input Support: Eliminates ground loop errors and common-mode noise in processes with solution earth connections.
• Advanced Temperature Compensation: Automatic Nernstian adjustment and configurable process solution compensation maintain accuracy across varying fluid temperatures.
• Auto-Calibration with Stability Check: Simplifies calibration and validates electrode performance, ensuring long-term measurement reliability.

2. Integrated PID Control

• On-Board Closed-Loop Control: Eliminates need for external controllers, enabling direct regulation of pH/ORP via dosing pumps or valves.
• Flexible Control Tuning: Fully configurable PID parameters for precise adaptation to diverse process dynamics.
• Multiple Control Outputs: Assigns control actions to analog current signals or relay contacts for versatile actuator control.
• Auto/Manual Mode: Supports seamless switching between automatic control and manual override for process commissioning and maintenance.

3. Robust I/O & Communication

• Isolated Analog Outputs: Galvanic isolation protects against electrical interference and ensures signal integrity in noisy industrial environments.
• Configurable Relays: Supports alarm, control, and diagnostic functions with programmable hysteresis and delay times.
• Profibus DP Option: Enables integration into modern industrial networks for centralized monitoring and data acquisition.
• Fault Indication Outputs: Analog outputs can be programmed to specific values to signal system faults or electrode failure.

4. Sensor Maintenance & Diagnostics

• Automatic Wash Control: Configurable relay for controlling automated electrode cleaning systems (frequency, duration, recovery time programmable).
• Comprehensive Diagnostics: Monitors electrode health, input faults, calibration status, and system errors with clear display alerts.
• Event Logging: Electronic logbook records major process events, calibration data, and alarms with timestamping (real-time clock option).
• Security Protection: 4-digit access code prevents unauthorized parameter changes, ensuring process safety and consistency.

5. Industrial-Grade Design

• IP66/NEMA 4X Enclosure: Resists dust, water ingress, and harsh industrial cleaning agents, suitable for outdoor and wash-down environmentsABB.
• Wide Operating Temperature Range: Performs reliably in extreme thermal conditions found in industrial facilities.
• EMC Hardened: Meets strict industrial EMC standards for immunity to electrical noise from VFDs and other equipment.
• Multiple Mounting Options: Adapts to panel, wall, or pipe mounting for flexible installation in various plant layouts.

Application Scenarios

1. Water & Wastewater Treatment

• Municipal Water Treatment: Monitors and controls pH in coagulation, flocculation, and disinfection processes; ORP measurement for oxidation-reduction control in activated sludge systems.
• Industrial Wastewater: Regulates pH for neutralization prior to discharge; ORP control for chemical oxidation of contaminants and cyanide destructionABB.
• Reverse Osmosis (RO) & Ultrafiltration: Maintains optimal pH to protect membranes and maximize filtration efficiencyABB.
• Cooling Water Systems: Controls pH and ORP to prevent corrosion, scaling, and biological growth in recirculating cooling loopsABB.

2. Chemical & Petrochemical Processing

• Chemical Synthesis: Precise pH control in batch and continuous reactions for product yield and quality optimization.
• Acid/Alkali Neutralization: Automated pH adjustment in chemical manufacturing and effluent treatment processesABB.
• Petrochemical Refining: ORP monitoring in sulfur removal and water treatment units; pH control in amine scrubbing systems.
• Specialty Chemicals: Ensures strict pH/ORP compliance in production of pharmaceuticals, fertilizers, and specialty polymersABB.

3. Power Generation

• Boiler Water Treatment: Controls pH and ORP to prevent corrosion and scale formation in high-pressure boilers and steam generators.
• Cooling Tower Management: Maintains water chemistry parameters for efficient heat transfer and equipment protectionABB.
• Flue Gas Desulfurization (FGD): pH regulation in scrubber systems for effective sulfur dioxide removal from exhaust gasesABB.
• Nuclear Power: Monitors and controls water chemistry in reactor coolant and auxiliary systemsABB.

4. Food & Beverage Industry

• Beverage Production: pH control in brewing, soft drink, and juice manufacturing for flavor consistency and product stabilityABB.
• Dairy Processing: Regulates pH during cheese making, yogurt fermentation, and whey processingABB.
• Food Preservation: ORP control in pasteurization and sterilization processes; pH monitoring in canned goods productionABB.
• Wastewater from Food Plants: Treats high-strength organic wastewater with pH adjustment and biological treatment controlABB.

5. Pharmaceutical & Biotechnology

• Bioreactor Control: Precise pH regulation in cell culture, fermentation, and biopharmaceutical production processesABB.
• Purification Systems: Maintains pH in chromatography and filtration steps for drug separation and purificationABB.
• Clean-In-Place (CIP) Systems: ORP monitoring for validation of cleaning and sanitization cycles in pharmaceutical manufacturingABB.
• Water For Injection (WFI): Ensures strict water quality parameters through continuous pH monitoringABB.

6. Pulp & Paper Manufacturing

• Pulp Digestion: Controls pH in kraft and sulfite pulping processes for fiber quality optimizationABB.
• Bleaching Stages: ORP and pH regulation in chlorine dioxide and peroxide bleaching sequencesABB.
• Paper Machine White Water: Monitors and adjusts pH to improve retention and drainage on the paper machineABB.
• Effluent Treatment: Treats pulp and paper mill wastewater with pH neutralization and biological treatment controlABB.