Colorimetric monitors

The ABB Aztec 600 aluminium, iron and manganese colorimetric monitors offer accuracy with simple operation and maintenance for potable water treatment applications.

The analysers use an LED and detector to measure the passage of light through a sample. A single piston pump provides all the sample and reagent fluid handling for measurement, mixing and disposal. Measurements are taken before and after colour reagents are added, to compensate for background colour and turbidity.

The analysers can measure up to six samples per hour.

They feature an automatic two-point calibration, allowing operators to verify analyser performance against standards of a known concentration. Self-cleaning abilities ensure the optical cell and analyser tubing remain free of residual particles between each analysis. A mechanical cleaning function uses the piston movement to wipe the optical cell with every measurement, minimising optical contamination.

The analysers also include various user-programmable automatic options for cell rinsing and acid and alkali washing.

The analysers are available in single or multi-stream configurations, enabling operators to use one device to monitor up to three streams sequentially all with current loop, ethernet or Profibus outputs.

The colorimetric analysers feature a full-colour graphical display, allowing process trends to be easily viewed and analysed locally. Historical logs provide operators with access to alarm and audit trail data. Process data and historical logs are securely archived to a removable SD card with capacity of up to 4 Gb.

A built-in ethernet communications link with onboard web and FTP servers enables remote monitoring, configuration selection, and data and log file access to the analyser from a web browser.