Velp Scientifica BOD Sensor Bedienungsanleitung Seite 2

Declaration of conformity / Dichiarazione di conformità / Déclaration de conformité / Declaración
de conformidad / Konformitätserklärung
We, the manufacturer VELP Scientifica, under our responsibility declare that the product is manufactured in conformity with
the following standards:
Noi, casa costruttrice VELP SCIENTIFICA, dichiariamo sotto la ns. responsabilità che il prodotto è conforme alle seguenti
norme:
Nous, VELP Scientifica, déclarons sous notre responsabilité que le produit est conforme aux normes suivantes:
Nosotros casa fabricante, VELP Scientifica, declaramos bajo nuestra responsabilidad que el producto es conforme con las
siguientes normas:
Der Hersteller, VELP Scientifica, erklärt unter eigener Verantwortung, dass das Gerät mit folgenden Normen übereinstimmt:
EN 61010-1 (2001)
and satisfies the essential requirements of the following directives:
e soddisfa i requisiti essenziali delle direttive:
et qu'il satisfait les exigences essentielles des directives:
y cumple con los requisitos esenciales de las directivas:
und den Anforderungen folgender Richtlinien entspricht:
- Machinery directive 2006/42/EC / Macchine 2006/42/CE / Machines 2006/42/CE / Máquinas 2006/42/CE / Maschinen
2006/42/EG
- Low voltage directive 2006/95/EC / Bassa tensione 2006/95/CE / Basse tension 2006/95/CE / Baja tensión 2006/95/CE /
Niederspannung 2006/95/EG
- Electromagnetic compatibility directive 2004/108/EC / Compatibilità elettromagnetica 2004/108/CE / Compatibilité
électromagnétique 2004/108/CE / Compatibilidad electromagnética 2004/108/CE / Elektromagnetische Verträglichkeit
2004/108/EG
- plus modifications / più modifiche / plus modifications / más sucesivas modificaciones / in der jeweils gültigen Fassung.
Analysis requirements
BOD Sensor or BOD EVO Sensor
Potassium hydroxide KOH
Stirring bar
Incubator (20 °C ± 0.5)
Analysis procedures
1. Pour into bottles the volume of sample according to adopted scale, measured by a graduated cylinder.
2. Put into each bottle a magnetic stirring bar.
3. Fill the alkali holder, small container located under bottle cap, with an amount of carbon dioxide absorber, enough to
avoid losses through the holes. If some alkali falls into a bottle, wash throughly before pouring again a volume of sample
under examination.
4. Place the bottles into position in the stirring equipment.
5. Introduce the stirring equipment into the refrigerated thermostat set to the temperature chosen for incubation. Connect
magnetic stirrers to mains introducing the plug into the socket. Put into operation the refrigerated thermostat.
6. After 30-40 minutes the apparatus and samples are usually in thermal equilibrium at the chosen temperature.
7. The apparatus is ready to start BOD measurement. Place a BOD Sensor on each bottle and screw tight. Reset each BOD
Sensor cancelling any memorized value, choose the most appropriate scale and start the measuring cycle.
Analytical method
Biochemical Oxygen Demand is expressed as weight of oxygen consumed per unit volume of water during a defined period
of time at a defined temperature, e.g. mg O
For carbon dioxide absorption:
Potassium hydroxide (KOH) scales, commercial grade or not deliquescent soda lime, 1.0-1.7 mm granules
If samples are to be neutralized before incubation:
Sulfuric acid (H SO ) 1.0 N solution
2 4
If samples are to be supplemented with nutrients:
Distilled water, high quality, free of copper and organic matter
Calcium chloride, anhydrous (CaCl
Potassium ortophosphate, biacid, (KH
Sodium ortophosphate, monoacid, (Na
If samples contain chlorine:
Sodium sulfite (Na SO )
2 3
If nitrification in samples is to be inhibited:
Allyl thiourea (Thiosinamine) C
Additive for mineral fertilizers aimed to lower nitrogen losses in soils.
EN 61326-1 (2006)
/l (or ppm = parts per million) during 5 days at 20 °C.
2
)
2
PO )
2 4
HPO )
2 4
H N S or 2-cloro-6 (thrichloromethyl) pyridine, C
4 8 2
2011/65/EU (RoHS)
Alkali container
500 ml dark glass bottle
Stirring base
Sodium hydroxide (NaOH) 1.0 N solution
Iron chloride, ferric, exahydrate (FeCl
Magnesium sulfate, heptahydrate (MgSO
Potassium ortophosphate, monoacid, (K
Ammonium chloride (NH
H Cl
6 3 4
2
2002/96/CE (RAEE)
3
Cl)
4
N (CTCMP, N-Serve)
• 6 H
O)
2
•7 H
O)
4 2
HPO )
2 4