Aztec 600 ISE ammonia and fluoride
Single-stream ion-selective analyzers
2 Introduction
OI/AXM630–EN Rev. I
7
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.
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.
Fig. 2.1 Main Components
Display
Liquid-Handling
Section
Liquid-Handling
Section Access Door
Cable Entries
(both sides of case)
Electronics
Section
Peristaltic Pump
Keypad
Temperature-Controlled
Probe Housing Block
Containing Ammonia or
Fluoride Probe
Solenoid Valves
Mixer Assembly
(Fluoride Analyzer,
optional on ammonia)
