ProMinent DULCOTEST PAA 1-mA-200 ppm Mode D'emploi page 39

ProMinent ®
Regarding two-stage titration:
NOTE
Calibration on a bottle-washing machine should only be per-
formed after a long uninterrupted period of operation, or when
the bottle-washing machine has stopped (PES concentration
remains constant).
If calibrating whilst the bottle-washing machine is running,
you should prepare everything for titration in the laboratory in
advance and measure the sample as soon as possible after
taking it.
If it has not already been done, fit the measuring cell in the in-line
probe housing DLG III or DGM (see section 6 assembly).
Take a sample for titration (see appendix). You should do this in
the immediate vicinity of the measuring cell. Tip: for the DGM in-
line probe housing, use the sample extraction valve (see fig. 2
and section 15 ordering information).
Determine the PES concentration as quickly as possible.
Adjust the value ascertained for PES concentration in ppm on
the control equipment in accordance with the relevant opera-
ting instructions manual (see operating instructions manual for
®
DULCOMETER
section 8, complete operating menu, set-up menu "PAA cali-
bration").
Regarding PES standard solution:
Add a known concentration of PES to a standard solution e.g. in
the cup of the DLG III in-line probe housing.
Stir the contents of the cup using a magnetic stirring rod.
Immerse the measuring cell in the cup until the measured value
remains constant (15 minutes).
Set the given PES concentration value for the standard solution
in ppm in the control equipment in accordance with the operating
instructions manual (see operating instructions manual for the
®
DULCOMETER
section 8, complete operating menu, set-up menu "PAA calibra-
tion").
D1C for the measured value peracetic acid,
D1C for the measured value peracetic acid,
Commissioning
39