ORBECO SP600, Instruction Manual, Page: 236 / 334

234 SP600 Spectrophotometer 01/2008
1.1 Methods
Spectral Absorption Coefficient
(S Abs)
0 – 50 m
-1
Spectral Absorption Coefficient
at 436 nm (S Abs1)
Spectral Absorption Coefficient
at 525 nm (S Abs2)
Spectral Absorption Coefficient
at 620 nm (S Abs3)
Methods 345, 346 and 347 are called up one after the
other and the water sample is analysed using the tests as
described below:
Sample preparation:
1. Filter the water sample through a membrane filter with
a pore width of 0.45 μm. (At least 100 ml of the water
sample should be filtered.)
Performing test procedure:
2. Fill a clean 50 mm cell with
deionized water
(Note 1).
3. Place the cell in the sample chamber making sure that
the positioning is correct.
4. Press ZERO key.
5. Remove the cell from the sample chamber and empty
the cell.
6. Use some of the filtered water sample to rinse out the
cell, then fill the sample into the cell.
7. Immediately place the cell in the sample chamber ma-
king sure that the positioning is correct.
8. Press TEST key.
The result is shown in the display in (m
-1
).
prepare Zero
press ZERO
Zero accepted
prepare Test
press TEST
3 4 6
3 4 5
3 4 7