Hach-Lange RTC112 SD-Module - Manual (Page 37)

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Section 5 Maintenance
5.1 Maintenance schedule
D A N G E R
Multiple hazards
Only qualified personnel must conduct the tasks described in this section of the manual.
Interval Maintenance task
Visual inspection
Application-specific Check for contamination and corrosion
Battery 5 years
Replacement by manufacturer's service department ( Section 8,
page 43 )