7. Place the vial in the sample chamber making sure that
the marks are aligned.
8. Press TEST key.
9.
Remove the vial from the sample chamber, empty the vial,
rinse vial and cap several times and then fill the vial with
exactly 10 ml Fluoride standard (Concentration 1 mg/l F).
10. Add exactly 2 ml SPADNS reagent solution to the
Fluoride standard.
Caution: Vial is filled up to the top!
11. Place the vial in the sample chamber making sure that the
marks are aligned.
12. Press TEST key.
The display shows:
Confirm with [
] key.
Back to method selection with ESC key.
Select Fluoride method with keys [Shift] + [1][7][0] and [ ].
If an error message appears please repeat adjustment.
Notes:
1. The same batch of SPADNS reagent solution must be used for adjustment and test.
The adjustment process needs to be performed for each new batch of SPADNS reagent
solution (see Standard methods 20th, 1998, APHA, AWWA, WEF 4500 F D., S. 4-82).
2. As the test result is highly dependent on exact sample and reagent volumes, the sample
and reagent volumes should always be metered by using a 10 ml resp. 2 ml volumetric
pipette (class A).
Zero accepted
T1: 0 mg/l F
press TEST
T1 accepted
T2: 1 mg/l F
press TEST
Calibration
accepted
Error, absorbance
T2>T1
7 01
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