Hach Lange astroTOC Basic User Manual page 27

Maintenance task
Examine the UV lamps and make sure that the
lamp surfaces are clear. If the lamp surfaces are
not clear, start a cleaning cycle. Before the
analyzer is put back online, wrap standard
aluminum foil around each lamp to prevent UV
exposure.
Clean the IR sample cell and windows with an
applicable solvent. Refer to
on page 32.
Clean the analyzer
Electrocution hazard. Remove all power from the instrument and relay connections before this
maintenance task is started.
Potential Instrument Damage. Delicate internal electronic components can be damaged by static
electricity, resulting in degraded performance or eventual failure.
Clean the external surfaces of the analyzer and the internal surfaces of the lower cabinet with a
damp cloth and a mild detergent.
After the analyzer has been in operation for approximately one month, examine the IR cell. Make
sure that the cleaning process and solution are sufficient to keep the internal system clean. Adjust
the auto cleaning schedule as necessary. Clean the internal system at least once a year.
Cleaning solutions
Chemical exposure hazard. Gas from a chlorine compound and UV light reaction can cause death. Do
not use chlorine compounds for cleaning.
Chemical exposure hazard. UV light reacts with some solutions to form a dangerous gas. If a
dangerous gas can form with the solution that is used, keep the UV lamps off.
Use a cleaning solution to clean biological films or compounds that can collect or crystallize in the
plumbing. Use a cleaning solution as specified in
The cleaning solution must not dissolve or damage the instrument components or produce harmful
gases or by-products. The applicable instrument components are shown in
If the clean cycle is not effective, adjust one or more of these options:
• Cleaning interval
• Cleaning duration
• UV lamp mode if safety is not compromised—refer to
• Cleaning solution
Table 8 Maintenance tasks and schedule (continued)
Clean the IR cell
Daily
D A N G E R
N O T I C E
D A N G E R
D A N G E R
Table 10.
Table 10
Monthly Quarterly
Table 9.
Annually
X
X
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