15. Compare the initial value and the challenge value. They should agree within 2 ppm. If not the CO-
CO
2
converter should be replaced.
6.4.6 Sintered Filter/Orifice Replacement
Equipment Required
• Orifice/filter removal tool (PN: H010046)
• 9/16” Spanner
Procedure
1. Remove the vacuum source from the Exhaust Port.
2. Refer to Figure 138. Unscrew the Kynar nut from the fitting (anti-clockwise).
Figure 138 – Kynar Fitting Containing Orifice and Sintered Filter
3. Remove the Kynar fitting from the measurement cell (anticlockwise).
4. Remove the spring from fitting to gain access to the orifice.
5. Remove the orifice by screwing in the orifice removal tool (finer thread end) clockwise, then gently
pull the orifice out of the fitting.
6. Remove the remaining O-ring and sintered filter.
Figure 139 – Remove Orifice and Sintered Filter
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