Hach-Lange SIGMATAX2 - Manual (Page 33)

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Section 6 Maintenance
Maintenance schedule DOC273.72.04008.MRZ03
Type of
device:
◦ 10 m ◦ 20 m ◦ 30 m Instrument number:
Commissioning on: by:
Annually:
Seal membrane on relief valve
Every 1.5 years:
Replace compressor
Every 3 months:
Clean supply lines and
sampling probe (interior)
Test pressure
Every 6 months:
Replace valve piston with seal
kit
Heat if there is a risk of
freezing!
Weekly:
Clean sample storage vessel
Visually inspect sample quality
Every 1–4 weeks:
Check/clean sampling probe
Clean sample tube
(semi-automatic)
The manufacturer recommends that an inspection contract be concluded. This contract
extends the warranty period to 5 years and makes sure that all inspection and
maintenance tasks are carried out by qualified experts.
Maintenance tasks for users are limited to regular visual inspections and, if necessary,
cleaning procedures.