SOL-96.110.041 / 290621
TOPAZ Total Alkalinity
Maintenance
33
6.3. Replacing Reagents
WARNING
Multiple hazards
For safe handling of the reagents, you must read and understand
the Material Safety Data Sheets (MSDS). Wear appropriate
protective equipment.
Note:
• It is recommended to replace the reagents when there is
approximately 2–3 cm of reagent left in each bottle. Do not use
up the reagents completely!
• Keep the old reagents until you are sure that the instrument
measures correctly with the new reagents.
• Do not reuse the reagent bottles as this poses a risk of
contamination or dilution errors.
Reagent
consumption
At the standard measurement interval, approximately 0.6 liters of
TAC indicator is consumed per month.
The consumption of sulfuric acid is proportional to the measured total
alkalinity. The consumption is 10 liters per month in the middle of the
measuring range and 20 liters per month at the upper limit of the
measuring range.
Replacing
reagents
1
Prepare the reagents according to the separate method sheet.
2
Insert the reagent tubes all the way to the bottom of the corre
-
sponding bottles (see
).
3
Check that there is an additional small hole in the lid of each
bottle that allows air to enter.
Final steps
4
Prime the reagent tubes (see
Priming the Reagent Tubes, p. 24
).
5
Perform a manual measurement.
If the result is satisfactory, no calibration is needed.
6
If necessary, calibrate the instrument (see
).