November 2007Analytical Instrumentation & Environmental Monitoring
Aimed at the power generation industry and other large-scale steam and water dependent industrial applications, the Navigator 600 Silica from ABB provides accurate monitoring over a wide range of silica concentrations (0 and 5000 ppb). The analyser is available in single or multistream configurations, enabling up to six streams to be monitored sequentially via current loop, Ethernet and optional Profibus DP V1 outputs.
The first in the new Navigator 600 series of chemical analysers, the manufacturer claims that the silica analyser uses one quarter of the reagents consumed by units from other manufacturers, greatly reducing annual costs. The cost of operation has been further reduced by reducing annual maintenance requirements with a carefully designed wet section, remote management, automatic calibration and cleaning. By incorporating user-programmable continuous or sampled measurements, the analyser allows a further reduction in reagent consumption in applications where silica concentrations are relatively constant.
Aimed at the power generation industry, the Navigator 600 Silica from ABB provides accurate monitoring over a wide range of silica concentrations
Unscheduled downtime is greatly reduced by comprehensive on-board diagnostics and predictive maintenance functions. Reagent bottle sensors alert operators to low reagent levels and an automatic cleaning function, which can be set to clean the whole wet section periodically, prevents problems with drift due to fouled tubes, chemical and optical systems. Together, these features allow the analyser to operate for three months or more without manual intervention.
ABB has designed the Navigator 600 Silica so that required annual maintenance to the pump tubing and capstan can be done in two to three minutes.
The equipment has been designed for ease of operation. Front-mounted pushbuttons allow easy device interaction in a familiar Windows environment. Operation and commissioning are straightforward and menu-driven. An extensive context sensitive on-line help feature is included.
Based on the same platform as ABB's ScreenMaster data recorders, the operator interface provides a choice of data display formats, including chart, bar graph and digital indicator views. Historical logs provide operators with access to alarm, totaliser and audit trail data. Process data and historical logs are securely archived to a removable SD card with capacity of up to 2 GB.
The Navigator 600 Silica includes a built in Ethernet communications link with an onboard web and ftp servers, enabling remote monitoring, configuration selection, and data and log file access to the analyser from a web browser.
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