Vapro 5520 - 4.3 Cleaning the TC Head

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SECTION 4
PREVENTIVE MAINTENANCE
4.3 Cleaning the TC Head
48
Materials needed to clean the TC head:
Wescor Cleaning Solution, (SS-003)
Thermocouple Cleaning Solution with Anionic
Detergent (SS-223)
Purified Water
Liquid Dropper
Blow Clean Liquefied Propellant or Equivalent.
(Pressure limited to 20 psig.)
NOTE:
To remove significant contamination, use both the
Wescor cleaning solutions (SS-003 and SS-223) followed
by numerous successive rinses with pure water.
Wescor’s cleaning solution (SS-003) is approximately 8%
ammonium hydroxide. Concentrated ammonium hydrox-
ide can be used to remove particularly stubborn contami-
nation, as described in Section 4.6. The Thermocouple
Cleaning Solution with Anionic Detergent (SS-223)
removes oily, waxy, or greasy contaminants. Lint or dust
particles can usually be removed by simply rinsing with
water a number of times.
Place a waste container close by on the floor.
1
Use a cotton swab to remove residue from the
surface of the mount surrounding the thermo-
couple.
2 With the dropper, release cleaning solution onto
the thermocouple mount.
3
Immerse the thermocouple and the entire sur-
face of the mount in cleaning solution. Let
stand at least 1 minute.
CAUTION!
Do not contact the thermocouple with the swab.