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EFM Option
6.2 Planned Maintenance
No planned maintenance procedures are required for EFM.
6.3 EFM Replacement Procedures
Replaceable parts on the EFM include:
• Hypoxic Guard Block
• Display Screen
• Circuit Board
• Flow Sensor(s)
6.3.1 Replace the EFM Hypoxic Guard Block
The EFM hypoxic guard gearing and basal fl ow setting is identical to the
conventional mechanical fl owmeter system. For information on the hypoxic
guard block, refer to Section 5.2 in this manual.
The hypoxic guard block itself is modifi ed to fi t the EFM fl ow sensors that replace
the mechanical fl ow tubes.
Figure 151 - EFM Hypoxic Guard Block Assembly