Section 5 Maintenance; Maintenance Schedule; Power Off The Instrument; Clean The Burette - Hach TitraLab User Manual

Section 5
5.1

Maintenance schedule

Maintenance task
Check all tube connections for leaks and damage.
Replace burette syringe
Valve block
Burette feed tube
Burette discharge tube
Bottle closure set
5.2

Power off the instrument

5.3

Clean the burette

5.4

Clean the electrode

Maintenance
Risk of injury
Before maintenance or repair work is conducted, thoroughly rinse the instrument with deionized
water and make sure that there are no residual chemicals in the tubes and pumps.
Only use genuine replacement parts and accessories.
The instrument must be serviced by the manufacturer's service department at the prescribed
intervals.
At the end of the working day, deactivate the instrument as follows:
• Empty the contents of the burette into the titrant bottle; refer to
• Empty and clean the used titration cells with deionized water.
When the instrument is to be deactivated for multiple days or extended periods, perform
the following steps:
• Clean the burette with deionized water.
• Seal the reagent bottles with the original bottle closures.
• Empty and clean the used titration cells with deionized water.
Make sure that there are no crystals or other sediments inside the syringe. If such deposits
are discovered, clean the syringe immediately, as this will otherwise damage the plunger.
Rinse the electrode with deionized water in order to clean it. Never use organic solvents to
clean the electrode.
The pH electrode must always be kept wet in a KCl solution when stored. To do this, fill the
protective cap with some KCl solution.
Never store the pH electrode in deionized water.
WA R N I N G
Every week 6 months
x
12 months
x
x
x
x
x
x
section 4.8.1, page 26.
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