ABB Navigator 600 Silica, Руководство пользователя

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Navigator 600 Silica
Single-stream Appendix C – Troubleshooting
IM/NAV6S/SS–EN Rev. E 77
C.2.3 Chemistry and Color Generation Errors
Symptom Action
Reagent order For correct chemistry and color generation to take place in the reaction block area, the reagents must
enter the reaction block in the correct order:
1. Check that each reagent is contained in the correct color-coded reagent bottle – see Fig. A.1,
page 65
2. Check that each reagent tube is inserted in the correct reagent bottle (see Fig. 3.1, page 9)
Chemistry and color
generation errors For correct chemistry and color generation to take place in the reaction block area, the reagents must
flow correctly.
To check flowrates:
1. Remove all 4 reagent tubes from the reagent bottles.
2. Increase the reagent pump speed to 10 rpm – see Section 8.4, page 52.
3. Check the air / reagent interface is moving up each of the reagent tubes at the same rate. If one or
more is moving more slower than the others:
a. Check the pump capstan for damage.
b. Check the pump tube assembly is sealed correctly. If necessary, remove and refit the relevant
assembly, ensuring the O-rings are wetted.
c. Initiate a manual clean sequence to remove any possible partial blockages.
For correct chemistry and color generation to take place in the reaction block area, the reagents must
produce the correct color changes.
To quickly check that the reagents can produce the required color changes:
1. To 100 ml of a 1000 µgl
-1
silica solution or even drinking water:
a. Add 10 ml of the first reagent (red channel – first acid)
b. Add 10 ml of the second reagent (violet channel – molybdate)
2. Wait 5 minutes and check that the yellow complex is formed.
3. Add 10 ml of the fourth reagent (brown channel – ascorbic acid)
4. Wait 5 minutes and check that the blue complex is formed.
Note. Reagent 3 is not used in this check as it is used to fine tune the chemistry in the analyzer for
accurate measurements