Section 12 Maintenance And Troubleshooting; Maintenance; Uv Detect Technology - Hach Anatel PAT700 User Manual

Section 12 Maintenance and Troubleshooting

12.1 Maintenance

12.1.1 UV Detect technology

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.
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 Company
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
or repair procedures, phone HACH Company 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, Inc., 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.
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.
Failed lamp indications
When code 128 is produced, the analyzer lamp has failed and must be replaced. Code
128 indicates that the UV lamp has failed and no longer supports proper analyzer
operation. If the UV lamp fails, the analyzer switches operation to the secondary UV
lamp.
Under a code 128 condition, the lamp is no longer producing adequate levels of UV light
to support proper sample oxidation.
127). If problems persist after performing maintenance
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