Oldham OLCT 200 User Manual page 74

Signs when the PID needs attention:

If the baseline climbs after you zero the PID, then the electrode stack needs
replacing.

If the PID becomes sensitive to humidity, then the electrode stack needs
replacing.

If the baseline shifts/unstable when PID moves, then electrode stack needs
replacing.

If sensitivity has dropped too much (note the change required when checking
calibration), then the lamp needs cleaning.
Lamp Cleaning
Inspection of the lamp may reveal a layer of contamination on the detection window
that presents itself as a 'blue hue.' To check for contamination, hold the lamp in front of
a light source and look across the window surface
Only clean the lamp using the recommended lamp cleaning kit and detailed
instructions. To avoid contaminating the sensor and affecting accuracy, do not touch
the lamp window with bare fingers. You may touch the lamp body with clean fingers.
PID lamp cleaning kit (P/N 78105025)
The vial of cleaning compound contains alumina (CAS Number 1344-28-1) as a very
fine powder. Cleaning should be undertaken in a well-ventilated area. A full material
safety data sheet MSDS is available on request from Ion Science Ltd. Key safety
issues are identified below:
Handling:
• Do not breathe in the powder. Avoid contact with skin,
eyes and clothing
• Wear suitable protective clothing
• Follow industrial hygiene practices: Wash face and
hands thoroughly with soap and water after use and
before eating, drinking, smoking or applying cosmetics.
Hazard identification:
• May cause irritation of respiratory tract and eyes
Storage:
• Keep container closed to prevent water
adsorption and contamination.
Cleaning the Lamp
Use of PID lamp cleaning P/N 78105025
1. Open the container of alumina polishing compound.
2. With a clean cotton bud, collect a small amount of
the powder.
OLCT 200 User Manual | 74