Hach EZ Series Basic User Manual page 26

Multiple hazards. Only qualified personnel must conduct the tasks described in this section of the
document.
Pinch hazard. Parts that move can pinch and cause injury. Do not touch moving parts.
Chemical exposure hazard. Obey laboratory safety procedures and wear all of the personal protective
equipment appropriate to the chemicals that are handled. Refer to the current safety data sheets
(MSDS/SDS) for safety protocols.
Chemical exposure hazard. Dispose of chemicals and wastes in accordance with local, regional and
national regulations.
9.1 Maintenance schedule
Table 6 shows the recommended schedule of maintenance tasks. Facility requirements and
operating conditions may increase the frequency of some tasks.
Task
Show the active alarms
Examine for leaks and malfunctions
on page 27
Prepare and replace the reagents
Examine and clean the electrode
Calibrate the pH electrode
Calibrate the analyzer on page 28
Clean the analyzer components
Clean the drain piping on page 28
Replace the peristaltic pump tubing
on page 29
Replace the dispenser syringe
Replace the dispenser valve
Replace the tubing on page 32
Replace the electrodes
Calibrate the photometer with bi-distilled water
on page 32
Replace the micropump duckbills
Replace the fuses on page 33
26 English
Table 6 Maintenance schedule
on page 27
on page 27
on page 27
on page 28
on page 28
on page 30
on page 31
on page 32
on page 32
W A R N I N G
W A R N I N G
C A U T I O N
C A U T I O N
1 day 7 days 30 days 90 days 365 days As necessary
X
X
X X
X
X X
X
X X
X
X X
X
X
X
X
X
X
X
X
X
X