Avoiding Errors; Consumables/Spare Parts - ProMinent DULCOTEST DT3 Instrucciones De Servicio

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Avoiding errors

Avoiding errors in photometric measurements
1. Thoroughly clean vials, lid and stirring rod after each analysis in order to prevent
carry-over errors. Even minute reagent residues lead to incorrect measurements.
Use the supplied brush for cleaning.
2. Ensure that the outer walls of the vials are dry and clean before performing the
analysis. Fingerprints or water droplets on the light entry surfaces of the vials lead
to incorrect measurements.
3. "Zero calibration" and "Test" must be performed using the same vial, as different
vials can possess slightly different tolerances.
4. For "Zero calibration" and "Test", ensure that the vial is always positioned in the
sample chamber in such a way that the graduation with the white triangle points
toward the marking on the housing.
5. Always perform "Zero calibration" and "Test" with closed vial lid.
6. Bubbles on the inside walls of the vial lead to incorrect measurements.
To prevent this, close the vial using the vial lid and remove the bubbles by swirling
the vial before performing the test.
7. You must prevent water from penetrating into the sample chamber. The entry of
water into the housing of the photometer can destroy electronic components and
lead to corrosion damage.
8. Soiling of the lens (LED and photosensor) in the sample chamber leads to incorrect
measurements.
Check - and if necessary clean - the light entry surfaces of the sample chamber at
regular intervals. Clean using a moist cloth and cotton buds.
9. Major temperature differentials between the photometer and the environment can
lead to incorrect measurements - e.g. due to the formation of condensation water
in the area of the lens or on the vial.
10. To avoid errors caused by stray-light do not use the instrument in bright sunlight.
5 Consumables/ Spare parts
Reagent for hydrogene peroxide (H
5 off spare cells (measuring cell for fotometer) with top cover (diameter: 16mm),
order no. 1024072
O ), 15 ml, order no. 1023636
2 2
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