Page 68 - PBL71 OI/AXM630-EN AZTEC 600 SS (WIRO)

Aztec 600 ISE ammonia and fluoride
Single-stream ion-selective analyzers
13 Maintenance
13 Maintenance
13.1 Changing Reagents and Standard Solutions
Reagent and standard solution requirements and consumption rates are illustrated in Appendix A of this manual.
To prevent the reagent and standard solutions from running out, check consumption as regularly as possible to predict the optimum changeover time.
Use the following procedure when changing the reagent / standard solutions:
1. Stop the analyzer – see Section 9.1, page 53.
2. Check that the shelf lives of the new reagent / standard solution bottles are sufficient for the expected period of use.
3. Remove the caps from each bottle and change them one by one.
Warning.
 Ensure personal protective equipment (PPE) such as gloves and eye protection are worn during any maintenance and that any spillages are cleaned-up using clean water.
 To familiarize yourself with handling precautions, dangers and emergency procedures, always review the Material Safety Data Sheets prior to handling containers, reservoirs, and delivery systems that contain chemical reagents and standards.
 Take care if cleaning any spillages and observe all relevant safety instructions – see Section 1, page 3.
 General cleaning of the instrument should be carried out using a damp cloth only, mild detergent can be used as a cleaning aid. Do not use Acetone or any organic solvents.
 Isolate electrical components before maintenance or cleaning.
 Observe all health and safety procedures for handling chemicals – see Section 1, page 3.
Caution.
 Avoid contamination of the solutions.
 When removing the reagent / standard solution level sensors, ensure that no contact is made with the stem, especially with bare hands.
 Do not top-up solution bottles.
 Dispose of the used bottles and contents safely, according to national or local regulations. Analyzer performance relies heavily on the integrity of these solutions so it is very important to prepare, store and handle them with care.
Aztec 600 analyzers are designed to be as maintenance-free as possible. The inherent product design and auto-calibrating features reduce the amount of maintenance required to external cleaning (sample lines, etc.), changing the reagents and scheduled annual maintenance only.
If followed correctly, the recommendations in this section help prolong the life and enhance the performance of the analyzer, thus reducing long-term operating costs. Operating costs can be further reduced by selecting 'Economy Mode' during Commissioning – see Section 6.8, page 43. This is designed to reduce reagent consumption at the expense of a slower response time.
Maintenance is divided into three categories:  changing reagents
 regular visual checks
 annual scheduled maintenance
4. Ensure the tubes are inserted correctly and the float switches are free to move.
5. When the level sensors are correctly in place, hand-tighten the bottle caps. This protects against the ingress of dust, water etc.
6. Select 'Prime lines and Calibrate' and press the key.
Take care when storing the bottles. Ensure they are date stamped, used in strict rotation and not used after the expiry date.
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