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Xylem WTW OxiTop-IDS User Manual

Xylem WTW OxiTop-IDS
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Multi 3630/3620 IDS Operation with OxiTop
®
-IDS measuring heads
ba77045d02 03/2020 19
5 Operation with OxiTop
®
-IDS measuring
heads
5.1 Measuring
5.1.1 Preparing the measurement
Municipal wastewater does not normally contain any toxic or inhibiting sub-
stances. There are enough nutrient salts and suitable microorganisms present.
Under these conditions, BOD determination in the undiluted sample using the
OxiTop
®
-IDS measuring system is possible.
Prior to measuring, carry out the following preparatory activities:
Keep ready the instruments and accessories required
OxiTop
®
-IDS measuring heads
Stirring platform
Thermostat cabinet/box (BOD standard: temperature 20 °C ± 1 °C)
Brown sample bottles (bottle volume 510 ml)
Magnetic stirring rods (1 stirring rod for each sample bottle)
Magnetic stirring rod remover
Suitable overflow volumetric flask
Rubber sleeves
Nitrification inhibitor ATH (NTH 600)
Sodium hydroxide tablets (NHP 600)
Determine the sample volume
(see operating manual of the OxiTop
®
-IDS measuring head)
Prepare the samples
(see e.g. operating manual of the OxiTop
®
-IDS measuring head or
WTW application reports, chapter "Sample preparation")
Further documents
on BOD
determination
Operating manual of your OxiTop
®
-IDS measuring head
WTW application reports (see www.wtw.com)
DIN EN 1899-2
Water quality - Determination of the biochemical oxygen demand after n
days (BOD) - part 2: Procedure for undiluted samples (ISO 5815:1989, mod-
ified)

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Xylem WTW OxiTop-IDS Specifications

General IconGeneral
BrandXylem
ModelWTW OxiTop-IDS
CategoryMeasuring Instruments
LanguageEnglish

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