ORBECO SP600, Instruction Manual, Page: 294 / 334

292 SP600 Spectrophotometer 01/2008
3. Press
ZERO
key.
4. Remove the vial from the sample chamber.
5. Add exactly 2 ml SPADNS reagent solution to the
water sample.
Caution: Vial is filled up to the top!
6. Close the vial tightly with the cap and swirl gently
several times to mix the contents.
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
exact 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 method Fluoride with keys [1][7][0] und [ ] .
Note:
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 SPANDS reagent so-
lution (see Standard methods 20th, 1998, APHA, AWWA,
WEF 4500 F D., S. 4-82).
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).
If there appears an error message please repeat adjust-
ment.
Zero accepted
T1: 0 mg/l F
press TEST
T1 accepted
T2: 1 mg/l F
press TEST
Calibration
accepted
Error, absorbance
T2>T1
1 7 0
Esc