User manual

PAT700 Total Organic Carbon Analyzer – Maintenance and Troubleshooting Page 163
Anatel Operator Manual
Chapter 12 Maintenance and Troubleshooting
DANGER
Tasks involving maintenance and service of this equipment may have electrical shock,
eye, and chemical hazards associated with them. These tasks must only be attempted
by individuals trained and knowledgeable in the particular task and the hazards
associated with it.
12.1 Maintenance
The PAT700 requires periodic maintenance to ensure the continued accuracy and reliable
performance of the analyzer. UV lamps have a limited life and should be replaced every six
months. The measurement cell should have a yearly calibration verification.
Maintenance procedures may be performed either by the user or by Hach customer service
personnel. The most common maintenance procedure is UV lamp replacement. In most
instances, you can perform the lamp replacement in the field (see PAT700 lamp replacement,
page 125). If problems persist after performing maintenance or repair procedures, phone
Hach at 800.866.7889 or +1 541.472.6500.
If you must return the PAT700 to the factory for maintenance or repair, obtain a Return
Materials Authorization (RMA) number. Provide the model and serial numbers, and any
additional relevant information. Ship the instrument(s) to Hach Company, Attn: RMA #xxxx.
NOTE
To clean the external surfaces of the analyzer, use only a damp cloth and mild cleaning
detergent. Do not use solvents or other chemicals that may damage the housing
components or display.
UV Detect technology
The PAT700 monitors the output of the UV lamp and produces an alarm if UV output indicates
a failing lamp or if the lamp has failed completely and can no longer support proper oxidation.
Code 127 indicates a failing lamp. Code 128 indicates a failed lamp.
Diminished lamp indications
When code 127 is produced, the analyzer UV lamp should be replaced as soon as possible.
UV Detect generates code 127 when UV output from the lamp has reached a level that
indicates a diminished lamp. At this level of UV output, the PAT700 switches lamp operation
to the secondary UV lamp.