Aztec 600 ISE ammonia and fluoride
Single-stream ion-selective analyzers
13 Maintenance
64
OI/AXM630–EN Rev. I
13 Maintenance
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
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.
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.
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.
