Page 11 - PBL71 OI/AXM630-EN AZTEC 600 SS (WIRO)

Aztec 600 ISE ammonia and fluoride
Single-stream ion-selective analyzers
2 Introduction
The Aztec ion-selective (ISE) range comprise advanced, single-stream, analyzers used to measure the levels of ammonia or fluoride in water treatment plants.
The measurement involves the addition of a reagent solution* to the sample under constant temperature conditions. This results in a reacted solution containing ions whose presence can be detected by the sensor. When exposed to the reacted sample, the sensor generates an electrical potential that changes in proportion to changes in concentration of the target ion.
During operation, the signal generated from the sensing system is converted by the analyzer into data and this information is presented on the display.
Analyzer main components are shown in Fig. 2.1. The hinged lower door provides environmental protection for the liquid-handling section to ensure stabilized measurement conditions.
2 Introduction
To maintain optimum measurement accuracy, the analyzer performs a 2-point calibration automatically by introducing standard solutions of known concentrations. The analyzer utilizes solenoid valves to introduce this solution automatically, at predetermined intervals.
Data is stored in the analyzer's internal memory and can be archived either to an SD Card or via an Internet connection. The SD card can also be used to upgrade the analyzer's software – see Appendix F , page 89.
This manual describes the operation and maintenance of the following Aztec 600 ion-selective analyzers:
 Aztec 600 ISE Ammonia  Aztec 600 ISE Fluoride
*For information about reagent solutions, contact the local ABB representative.
Display
Liquid-Handling Section Access Door
Cable Entries
(both sides of case)
Keypad
Peristaltic Pump
Mixer Assembly (Fluoride Analyzer, optional on ammonia)
Temperature-Controlled Probe Housing Block Containing Ammonia or Fluoride Probe
Electronics Section
Liquid-Handling Section
Solenoid Valves
Fig. 2.1 Main Components
OI/AXM630–EN Rev. J
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