
7 Maintenance
133 K-375/376/377 Operation Manual, Version B
7.5 Yearly maintenance
7.5.1 Replacement of wear parts
Replace the following components:
• Seals including the sealing cap of the sampler and the splash protector seal.
• NaOH pump and boric acid pump (the other pumps as required).
• Dip tube.
• pH electrode (if required depending on sample throughput and maintenance of the pH electrode).
• Wave spring in the sampler arm.
• Hoses inside the distillation unit, especially the ones that make contact with steam, NaOH and
H
3BO3.
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