Detcon PI-700 0-500ppb - Manual (Page 32)

Model PI-700 0-500ppb
PI-700 0-500ppb Instruction Manual Rev. 0.0 Page 28 of 53
General recommendations for Sensor Maintenance
™ For normal environmental exposure and signal decay, replace the plug-in sensor every 9-12 months.
(especially if there are no skilled technicians to handle proper UV lamp replacement.)
™ If skilled technicians are available, replace just the UV lamp every 9-12 months.
™ For abnormally high rates of signal decay, clean the UV lamp monthly, using a Lamp Cleaning Kit, and
replace the UV lamp every 9-12 months.
™ For any proven cases where the zero baseline has drifted up, replace the detector cell.
All PiD Sensor Cells contain six user replaceable components:
Filter
Cap Spacer
Filter Media #1
Filter Media #2
Cell Assembly
10.6eV Lamp
Figure 14 Sensor Cell Parts
NOTE: Avoid touching lamp’s window as well as any metal portion of the Detector Cell with
bare fingers. It is acceptable to hold the lamp by it’s glass body or by the edges of the window.
Fingerprints left on those parts may adversely affect the sensor’s operation. Use of cotton or
latex gloves is suggested.
Disassembly
1. Power down the instrument and remove the sensor cell.
2. Remove the filtercap by applying a slight upward pressure with the tip of a screwdriver or an Exacto Blade
just below the hole in the cap and between the cap and the housing.