Wtw pH 3110 Bedienungsanleitung PDF herunterladen

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pH Value

The water molecule has the property of dissociating into two ionic components in aqueous solutions.

O ⇋ H

+ OH

–

pH Meters

The H

ion is termed hydrogen ion or proton, the OH

–

ion

hydroxide ion.

The pH value describes the activity of hydrogen ions in

aqueous solutions on a scale of -1 to 15. Based on this scale,

liquids are characterized as being acidic, alkaline or neutral:

a solution which is neither acidic or alkaline is neutral. This

corresponds to a value of 7 on the scale. Acidity indicates a

higher activity of hydrogen ions and a pH value lower than

7. Alkaline solutions are characterized by a lower hydrogen

ion activity or higher hydroxide ion activity, respectively,

and a pH value above 7. The graph below uses examples to

illustrate the pH scale.

The pH scale is logarithmic. A difference of one pH unit

represents a tenfold, or ten times increase or reduction of

hydrogen ion activity in the solution. This explains how a

solution’s aggressiveness increases with the distance from

the neutral point.

The pH value can be measured using electrochemical mea-

suring systems, litmus paper, indicators and colorimeters.

Of these methods, electrochemical sensors provide the

most accurate results.

The pH electrode is an electrochemical sensor that consists of

a measuring electrode and a reference electrode. The mea-

suring electrode is made of special glass which, due to its

surface properties, is particularly sensitive to hydrogen ions.

It is filled with a buffer solution which has a pH value of 7.

When placing the pH electrode into a test solution, the

change in voltage is measured by the electrode by comparing

the measured voltage to the stable reference electrode. This

change is recorded by the meter and converted into the pH

value displayed. With modern IDS sensors the signal pro-

cessing is performed inside the sensors providing better sig-

nal quality and additional documentation features.

orange juice sea water

Cola ammonia

0.4 % HCI milk 0.4 % NaOH

-1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

acidic neutral basic/alkaline

1 2 3 4 5 6 ... 17 18

Inhaltsverzeichnis

Seite 1

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Seite 2

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Seite 3 - Laboratory pH Meters

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Seite 4 - Ordering Information

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Seite 5

For information visit www.WTW.com for a customer care center near you or inside US: call WTW 800 645 5999.40SenTix® pH electrodes for every applicatio

Seite 6

425 mm (16.73 in.)For information visit www.WTW.com for a customer care center near you or inside US: call WTW 800 645 5999.Software/PrintersColony Co

Seite 7 - Portable pH Meters

For information visit www.WTW.com for a customer care center near you or inside US: call WTW 800 645 5999.421: Plug head, 2: Fixed cable, 3: AS/DIN, A

Seite 8

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Seite 9

For information visit www.WTW.com for a customer care center near you or inside US: call WTW 800 645 5999.44* North American version• Easy-to-dispens

Seite 10

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Seite 11

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Seite 12

pHFor information visit www.WTW.com for a customer care center near you or inside US: call WTW 800 645 5999.30Laboratory pH MetersAlong with weight an

Seite 13 - pH electrodes

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Seite 14 - pH Electrodes

For information visit www.WTW.com for a customer care center near you or inside US: call WTW 800 645 5999.32Reliable pH documentation…… with the inoLa

Seite 15

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Seite 16 - Special pH Electrodes

pHFor information visit www.WTW.com for a customer care center near you or inside US: call WTW 800 645 5999.34NEWPortable pH MeterspH is a parameter t

Seite 17 - ** l ** l l

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Seite 18

For information visit www.WTW.com for a customer care center near you or inside US: call WTW 800 645 5999.36Measuring pH precisely…… with the ProfiLin

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Wtw pH 3110 Bedienungsanleitung

Stöbern Sie online oder laden Sie Bedienungsanleitung nach Multimeter Wtw pH 3110 herunter. WTW Lab Catalog 2012, pH Benutzerhandbuch

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