wtw Turb 555, Руководство по эксплуатации

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Turb 555 / Turb 555 IR Operation
23 ba41113e07 04/2009
4.2.2 Single measurements
Preparatory activi-
ties
Perform the following preparatory activities when you want
to measure (see section 3.3 S
WITCHING ON THE MEASURING
INSTRUMENT
):
Note
Incorrect calibration of the turbidimeter will result in incorrect
measured values.
Carry out the calibration regularly at the specified fixed inter-
vals.
Note
The outside of the cuvette always has to be clean, dry, and
free of fingerprints. Clean the cuvette before starting to mea-
sure (see section 5.2.2 C
LEANING THE CUVETTES
). Only hold
the cuvettes by the top or by the black light protection cap.
Measuring How to measure the turbidity of a sample:
1 Switch on the measuring instrument.
2 Wait until the warm-up period is over.
1 Rinse out a clean cuvette with the sample to be mea-
sured:
Pour approximately 20 ml sample into the cuvette.
Close the cuvette and rotate it several times before
throwing the sample away.
2 Repeat the rinsing procedure twice more.
3 Fill the cuvette with the sample to be measured (ap-
prox. 30 ml). Close the cuvette with the black light
protection cap.
4 Make sure that the outside of the cuvette is clean,
dry, and free of fingerprints.