User manual

Page 172 Maintenance and Troubleshooting – PAT700 Total Organic Carbon Analyzer
Operator Manual Anatel
NOTE
Failure to purge the analyzer of all liquid, remove all process materials, and thoroughly
clean the analyzer before returning it to Hach Company can cause property damage or
personal injury.
Before shipping the analyzer:
• Purge the analyzer of all liquid.
• Remove all process materials and thoroughly clean the analyzer.
Draining the analyzer
NOTE
Failure to purge all water from the analyzer when taking the instrument out of service
can cause residual water to freeze and expand inside the analyzer, resulting in damage
to the measurement cell.
To avoid damaging the measurement cell, purge all water from the analyzer before taking it
out of service. Such damage is time consuming to repair and is not covered by the warranty.
Hach also offers service and extended warranty options to cover scheduled maintenance,
calibration and repairs. If returning the analyzer to the factory is impractical, onsite
maintenance and/or verification can be performed by a Hach technician, or a certified
analyzer may be rented. Repairs are performed only at Hach service centers due to the
specialized equipment and parts required.
For two reasons, you must drain the PAT700 of all water before removing the analyzer from
its source:
• If the analyzer is removed from service for temporary or long term storage (longer than
a month), any water remaining in the measurement cell is a medium for bacteria
growth. Elements contained in the sample water will settle and adhere to the
instrument components, causing contamination. The analyzer should self-clean for an
extended period of time before reinstallation to ensure accurate and stable data.
• Draining the water out of the analyzer also prevents damage due to freezing. If the
analyzer is stored or shipped in a cold environment, the water inside the analyzer
expands and could severely damage sensitive components. Replacing these
components is expensive and increases repair time as much as a week.
NOTE
Leaving water inside the analyzer if it is in a warehouse in the winter can cause
freezing, and shipping the analyzer from a warm climate to a cold climate can expose
the analyzer to temperature extremes en route, resulting in product damage.
To avoid damaging the analyzer:
• Do not leave water inside the analyzer before putting it into storage.
• Do not expose the analyzer to temperature extremes.