Buchi KjelSampler K-377 Manual do Utilizador descarregar pdf (Página 120)

7 Maintenance

120 K-375/376/377 Operation Manual, Version B

7.1 Daily maintenance

7.1.1 Before sample determination

• Remove the electrode from the storage cap (the cap can ﬁxed to the electrode holder on the front

side of the housing) and place it into the receiving vessel.

• Rinse the titration hoses (Path: System Preparation  Buret functions  Buret function “Dose”).

• Calibrate the pH electrode with fresh buffer solution, see also chapter “6.6.1 System Preparation”.

• Prime the system (Path: System Preparation  Priming), see also chapter “6.6.1 System Prepara-

tion”.

• Submerge the pH electrode into the measuring medium at least up to the diaphragm.

NOTE

All glass parts must be warm before the analysis begins. Therefore a preheating of the system is

necessary if more than 15 minutes pass between two determinations (Path: Operator, System prepa-

ration, Preheating).

Cleaning between samples is not necessary, unless sample deposits are found in the splash

protector. (Path: System Preparation  Cleaning).

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Buchi KjelSampler K-377 Manual do Utilizador Página 120