Table of Contents
Advertisement
9.4 O-rings
9.4 O-rings
O-rings inside the PILS head assembly where the droplets are collected will become dry
with use. There are six O-rings in total. Apply fresh grease to the O-rings roughly once
per year. Visually inspect the o-rings for damage and replace any that appear cracked or
deformed. Contact the factory if you require new O-rings.
9.5 Cleaning the PILS
Under persistent high aerosol loading conditions, the pre-impactor, denuders, conden-
sation chamber, droplet impactor, quartz impactor plate, mesh wick, debubbler, and
liquid sampling tubing may become contaminated with insoluble material like soot or
sparingly soluble organic species. Copmponents like the pre-impactor, denuders, quartz
impactor plate and mesh wick will require regular attention and cleaning, likely on a
monthly or few-week basis depending on sampled mass concentrations. Other items
typically require cleaning annually.
Monitor background concentrations of key species and visually inspect items for de-
posits to determine when a full system cleaning is required. Disassemble the various
items and clean with pure water and alcohol, using a lint free cloth to clean surfaces.
Be sure not to leave behind any lint or cleaning material. Replace used liquid handling
tubing once soiled. Replace the debubbler membrane and clean the inside of the PEEK
debubbler. Replace the mesh wick when obviously dirty or when the liquid sample flow
rate is no longer stable. Refer to the manual that came with your pre-impactor for pro-
cedures on cleaning and using it.
The low background concentrations attainable with the PILS assume the unit is clean and
free of semi-soluble deposits that may leach ions over time, degrading your baseline.
9.6 Bottles
After long-term use the plastic material of the bottles may become brittle and prone to
shatter. Contact the factory if you require new bottles.
9.7 Peristaltic Pump
After long-term use, the motor, gearbox and rollers of the pump may become worn and
not work properly. Contact the factory if you require a new pump.
83-00009-01A
PILS 4001-115V and 4001-230V
Page 63 of 74
Advertisement
Table of Contents
