wtw Turb 555, Руководство по эксплуатации

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Operation Turb 555 / Turb 555 IR
18 ba41113e07 04/2009
Note
Always use the cuvette and the light protection cap together;
only in this way is the cuvette marked.
Aligning a marked
cuvette
A marked cuvette is aligned as follows:
Aligning an
unmarked cuvette
An unmarked cuvette is aligned as follows:
Balancing cuvettes Even insignificant variations in the glass affect the mea-
sured value. For this reason, always use the same cuvette
or balance a pair of cuvettes for low turbidity values:
1 Insert the cuvette in the cuvette shaft of the turbidi-
meter.
2 Align the marked cuvette so that the arrow on the
marker ring points to the marker pin on the locking
collar of the cuvette shaft.
1 Insert the cuvette in the cuvette shaft of the turbidi-
meter.
2 Slowly rotate the cuvette through one complete rota-
tion (by 360°).
3 Watch the display of the turbidimeter while you rotate
the cuvette. Leave the cuvette in the position that
gives the lowest display.
1 Fill the first cuvette with the sample, align it and mark
it (see section 4.1.1 M
ARKING AND ALIGNING CUVET
-
TES
).
2 Fill the second cuvette with the same sample and in-
sert it into the cuvette shaft.
3 Rotate the cuvette until the same measured value is
displayed as for the first cuvette.
4 Mark the cuvette with a marker ring.