OI Analytical 5380, Руководство оператора

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Chapter 6 83
Maintenance
!
CAUTION:
Do not exceed
420°C, the
maximum
recommended
temperature for
the PFPD.
Cleaning the Detector Cap, Body and Base, and Combustor
Support
OI Analytical rigorously cleans and bakes these parts prior to shipping to remove
all traces of machining oils. Normal contamination due to handling, dust, or
contact with dirty surfaces can be readily removed by using organic solvents
(methanol, isopropanol, hexane, acetone, etc.).
1. Pass solvents through all sections of tubing to ensure that the contaminants
are not simply displaced into normally inaccessible spaces.
2. Bake off the solvents at a sufficiently high temperature (e.g. 350°C) to
remove the solvent and the contaminant that may be in the solvent. It is
particularly important to bake off compounds that may interfere with the
detection of sulfur and phosphorus.
3. If the cleaned detector components are to be immediately reused, the baking
process can be done after reassembling the PFPD through a staged heating
process. The stage process used by OI Analytical includes setting the initial
detector temperature to 200°C, increasing it to 350°C after an hour, and
decreasing it back to 200°C after another hour.
4. Allow all parts to cool to room temperature prior to storage or installation.
Cleaning Sealing Washers
1. Place sealing washers in a clean beaker and sonicate with methanol or
isopropanol.
2. Remove washers from the methanol or isopropanol using clean metal forceps.
3. Put the washers into a clean beaker and bake at 70°C for 30 minutes.
4. Allow the washers to cool to room temperature, and then store them in a
protective container.
Cleaning O-rings, Extractor Tools, and Teflon Forceps
1. Place O-rings, extractor tools, or Teflon-coated forceps in a clean beaker and
sonicate in methanol or isopropanol.
2. Remove the components from the beaker using clean Teflon forceps and
place in a clean beaker. Bake at 150°C for four hours.
3. Allow the components to cool to room temperature, and then store in a clean
protective container.