Liquiline System CA80AL

Summary

Product Identification

The Liquiline System CA80AL is a wet-chemical analyzer designed for the near-continuous determination of aluminum concentration in liquid media. It utilizes a colorimetric measuring principle.

Application

This analyzer is suitable for:

• Controlling phosphate precipitation in wastewater treatment plants.
• Monitoring precipitants in drinking water and wastewater treatment plants.

The "Cabinet, outdoor version" is designed for outdoor installation, mounting, and operation.

Key Features and Benefits

• Integrated controller with up to 2 measuring channels and digital Memosens technology.
• Expandable: Can be upgraded to a measuring station by connecting up to 4 Memosens sensors.
• Digital Fieldbuses: Supports protocols such as PROFINET, PROFIBUS DP, Modbus TCP, Modbus RS485, and Ethernet IP, along with an integrated web server.
• Easy Maintenance: Features simple, tool-free maintenance.
• Reliability: Memosens technology offers non-contact, digital signal transmission for improved safety and reliability, allowing for lab calibration.
• Data Logging: Includes integrated ring or stack memories for recording analog values, events, and analyzer data.
• Mathematical Functions: Capable of calculating up to 6 "virtual" process values using mathematical and Boolean operations.

Measuring Principle

The analyzer employs the Pyrocatechol violet method according to DIN ISO 10566. Catechol violet reacts with Al(III) in a buffered solution (pH 5.8-6.0) to form a blue dye. Absorption is measured at 568 nm, with absorption being proportional to aluminum concentration. A reference measurement is performed to compensate for interference influences.

Cross-Sensitivity

The following ions were tested and showed no observed cross-sensitivities up to the specified concentrations:

• 1000 mg/l (ppm): Cl⁻, SO₄²⁻
• 500 mg/l (ppm): Ca²⁺, K⁺, Na⁺
• 100 mg/l (ppm): NO₃⁻
• 10 mg/l (ppm): Zn²⁺
• 2 mg/l (ppm): F⁻

Measuring System Components

A complete measuring system includes the analyzer, reagents, cleaner, standard solutions, and optionally, sample conditioning units like:

• Liquiline System CAT810: Microfiltration (50 µm sieve filter).
• Liquiline System CAT820: Membrane filtration (0.1 µm or 0.4 µm ceramic membrane, or 0.04 µm plate filter).
• Liquiline System CAT860: Membrane filtration (0.1 µm or 0.4 µm ceramic membrane filter candle) with automatic backflush.

Input

• Measured Variables: Al [µg/l, ppb]
• Measuring Range: 15 to 1000 µg/l (ppb) Al. An optional dilution function allows for configurable measuring ranges up to 20,000 µg/l (ppb) with dilution factors of 5, 10, or 20.
• Channels: 1 or 2 measuring channels (analyzer main parameter).
• Optional Inputs: 1 to 4 digital sensor inputs (Memosens protocol), analog current inputs, binary inputs.
• Input Signal: 2 x 0/4 to 20 mA (optional), passive, potentially isolated.
• Memosens Sensor Cable Length: Max. 100 m (330 ft).

Output

• Output Signal:
  • Standard: 2 x 0/4 to 20 mA, active, potentially isolated.
  • Optional: 4 x or 6 x 0/4 to 20 mA, active, potentially isolated.
  • Binary outputs.
• Signal on Alarm: Adjustable, as per NAMUR Recommendation NE 43 (failure current 0 to 23 mA or 2.4 to 23 mA).
• Load (Current Outputs): Max. 500 Ω.
• Relay Outputs:
  • 1 x alarm relay (changeover contact).
  • Optional: 2 or 4 additional changeover contacts.
  • Maximum load: 0.5 A (alarm relay), 2.0 A (other relays).

Electrical Specifications

• Supply Voltage: 100 to 120 V AC / 200 to 240 V AC or 24 V DC (not available for "Outdoor" version). Frequency: 50 or 60 Hz.
• Power Consumption: Varies by version (e.g., 130 VA + 660 VA per hose heater for non-outdoor versions, 680 VA + 660 VA per hose heater for outdoor versions with cooling system).
• Fuse: 5 x 20 mm 10 A/250 V fine-wire fuse for hose trace heating system.

Mechanical Construction

• Dimensions: See figures in the datasheet for specific dimensions of closed, open, and base-mounted versions.
• Weight: Cabinet version: 39.5 kg (87.1 lbs); Open installation: 31.5 kg (69.45 lbs); Analyzer stand: 72.5 kg (159.8 lbs).
• Materials: Various plastics (ASA, PC, PP), stainless steel, glass, and elastomers are used for different components.
• Process Connection: Plug-in connector for rigid hoses (OD 4 mm) or hose barb for flexible hoses (ID 1.6 mm) for sample inlet. Hose barb for flexible hoses (ID 13 mm) for outlet.

Environment

• Ambient Temperature Range:
  • Standard versions: +5 to +40 °C (41 to 104 °F).
  • Outdoor version: -20 to +40 °C (-4 to 104 °F).
• Storage Temperature: –20 to 60 °C (–4 to 140 °F).
• Relative Humidity: 10 to 95 %, non-condensing.
• Degree of Protection: IP55 (cabinet, analyzer stand), TYPE 3R (cabinet, analyzer stand).
• Sample Temperature: 4 to 40 °C (39 to 104 °F).
• Sample Consistency: Low solids content (turbidity < 50 NTU), aqueous, homogenized.
• pH Value of Sample: < 6.

Communication Protocols

• Fieldbus Systems: PROFIBUS DP, Modbus TCP or RS485, PROFINET, EtherNet/IP.
• Web Server: For remote access to configuration, measured values, and diagnostics.

Display

• Type: Graphic display with 240 x 160 pixel resolution.
• Features: Backlight with switch-off function, red display background for alarms, transflective display technology.

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Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror