Hach-Lange 5341 User Manual [en, de, es, fr, it]

pH

53 41

pH

53 41

1

2

3

4

5

pH@20ºC F- limit (ppm)

2 300
3 1000
4 6000

5 no limit

2

6

7

8

9

KCl 3M

Key points. Hauptteile.
Puntos clave. Points clé.
Punti chiave. Pontos chaves.

Protective cap.

1

Schutzkappe.

Tapón protector.

Bouchon protecteur.

Tappo protettore.

Tampa protetora.

S8 connector.

2

S8-Stecker.

Conector S8.

Connecteur S8.

Connettore S8.

Conector S8.

PG 13.5 thread.

3

Montagegewinde PG 13,5.

Rosca de sujeción PG 13,5.

Filetage PG 13,5.

Filettatura PG 13,5.

Rosca de fixação PG 13,5.

Reference element.

4

Referenzelement.

Elemento de referencia.

Élément de référence.

Elemento di riferimento.

Elemento de referência.

Internal diaphragm.

5

Internes Diaphragma.

Diafragma interno.

Diaphragme interne.

Diaframma interno.

Diafragma interno.

Gel electrolyte.

6

Elektrolytgel.

Electrolito gel.

Électrolyte gel.

Elettrolita gel.

Eletrólito gel.

Diaphragm: ceramic.

7

Diaphragma: Keramik.

Diafragma: cerámico.

Diaphragme: céramique.

Diaframma: ceramico.

Diafragma: cerâmico

Sensitive glass membrane.

8

Sensitive Glasmembran.

Membrana sensible.

Membrane sensible.

Membrana sensibile.

Membrana sensível de vidro.

Storage protector.

9

Lagerungsschutz.

Protector de almacenamiento.

Tube protecteur de stockage.

Protettore per la conservazione.

Protetor para armazenamento.

(EU Directive 2002/96/EC)

3

pH electrode 53 41

Introduction

The 53 41 is a low maintenance pH elec-
trode for samples containing HF.

SAFETY NOTE
Before use with hazardous substanc­es, find out about the relevant haz­ards, protective measures, and what
to do in an emergency.

Electrode preparation

• Remove the storage protector

• Verify that there are not air bubbles

inside the membrane
removed by shaking the electrode as a
clinical thermometer.

Installation

In immersion, insertion, flotation housings,
etc. with PG 13,5 thread.

See Housing instruction manual.

In some cases the electrode is installed,
with the help of sockets and adapters,
directly onto pipes.
Cable. They are connected to coaxial
cables with an AS9 connector.

Calibration

See pH-meter instruction manual.

Measurements. Recommendations

See pH-meter instruction manual.
Ensure that the electrode’s specifications
are adapted to the process.
Sample must cover the diaphragm

Maintenance

• Deposits forming on the electrodes,

caused by continual exposure of the sen­sors to a dirty or contaminated medium, is
one of the most frequent causes of prob­lems when measuring pH. When possible
it’s recommended to use a housing with
automatic sensor cleaning system.

• When an electrode gets contaminated,

the simple rinsing with distilled water is
not suffi cient. The most suitable clean­ing solution is one which acts in a more
selective way over the contamination
(look for regeneration solutions).

• Re-hydration. A “dry” electrode re-

covers by immersing it in diluted HCl
solution for several hours. It is recom­mended to read the information sup­plied with the electrode’s regenerating
solutions.

.

. They can be

.

Troubleshooting

... the meter always shows the same pH

value.
Short circuit in the electrode or cable.

Substitute the cable or the elec­trode.

... shifting of pH values.

Reference system contamination.

Replace the electrode

... unstable reading.

Diaphragm blockage.

Clean, regenerate, replace the elec­trode.

4

GB

... impossible to perform calibration.
... very slow response.

Dirt on the diaphragm or the mem­brane.
De-hydrated membrane.
Electrode ageing or wear.

Clean, regenerate, replace the elec­trode.

Storage

The connector should be protected from
humidity by the protective cap .
Place the electrode in the storage protec­tor with KCl 3M.

Specifications

Measuring range 0 to 14 pH
Operating temp. 0 to 80 °C
Max. pressure 6 bar
Reference element cartridge
Diaphragm ceramic
Electrolyte gel
Body material glass
Thread PG 13,5
Connector S8
Min. immersion depth 17 mm

Applications

Water containing fluoride.

Warning. The resistance of the
membrane is directly related to the HF
concentration and the pH of the sample
(see ).

Limitations

Viscous solutions or samples with colloids.
Distilled water.

CERTIFICATE OF QUALITY

The attached electrode 53 41 has passed
the quality test and follows the next speci­fications:

• Asymmetry potential < ± 15 mV.

• Sensitivity, pH 4 to 7 (at 25 ˚C) > 98%.

• Response time, pH 4 to 7 < 20 s.

5