Hach 5500sc - Page 5

Table 1 Maintenance schedule (continued)
Task 1 month 3 months 6 months 1 year
Replace the standards (Replace the
analyzer bottles on page 14)
X
1
Replace the cleaning solution (Replace the
analyzer bottles on page 14)
X
2
Replace the internal filter X or as needed
Clean the screen in the 40-mesh external
filter (Y-strainer)
X or as needed
Clean the screen of the optional 100-µm
external filter
X or as needed
Replace the fan filter
3
X or as
needed
Replace the reagent air filter X
Replace the tubing
3
X
Replace the stir bar X
Replace the check valves on the
colorimeters (if applicable)
4
X
Replace the sample pump
3
X
1
With one calibration per week (default)
2
For one cleaning per 6 hours (default)
3
Refer to the documentation supplied with the replacement part.
4
Not applicable to newer instruments.
English 5