4. Mark the location of the chamber head heater by measuring from the
stiffener rib COUNTERCLOCKWISE around the chamber. See the
diagram. Mark the chamber head at 330 mm. Draw a line from that
mark across the center line of the head. The heater straddles this
line. It is centered about the chamber head with the heater wires at
the optical port end.
5. Clean all mating surfaces of the heater and chamber with 3M Citrus
Base Natural Cleaner followed by cleaning with isopropyl alcohol.
6. Using masking tape, mark off the areas where the heaters are to be
installed.
Using the Primer and Preparing the Adhesive
1. Do NOT use the primer or adhesive if they have expired dates.
2. Verify the expiration date of the primer.
3. Be sure you have measured and marked the chamber for the location
of the heaters to be replaced. Brush a thin, uniform film of Silicone
Primer onto the areas where the heaters are to be bonded.
4. Allow 1 hour (minimum) drying time.
4
4
Note:
Do NOT handle or contaminate the coated surfaces. You
may cover and leave overnight.
5. Verify the expiration date of the adhesive.
6. Using the ratios shown below, mix at least 5 times the volume of
adhesive needed to allow for expansion during de-aeration.
Mix ratio
RTV = 99.5% (40 grams)
DBT Catalyst = 0.5% (10 drops)
Pot Life:
1 hour (time may be extended by
freezing)
Cure time:
24 hours at 25º C or 8 hours at 40º C.
4
4
Note:
Do NOT mix more than can be used with the 1 hour pot
life.
7. Thoroughly mix the adhesive and catalyst together. Place the
adhesive mixture in the chamber.
8. Run the vacuum RF test to de-aerate the mixture for at least 10
minutes.
9. Verify the correct heater voltage from the markings on the heater
(120V for -001 or 240V for -002)
10. Clean the unprinted side of the heater with 3M Citrus Base Natural
Cleaner and then isopropyl alcohol.
Removal/Replacement
Door and Chamber Subsystem
ASP Service Guide rev D
STERRAD® 100 Sterilizer
7-21
Summary of Contents for STERRAD 100
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