Rosemount 8712 - Process Leak Containment

Reference Manual
00809-0100-4664, Rev BA
January 2010
5-17
Rosemount 8712
Process Leak
Containment
The second optional configuration, identified as option code W3 in the model
number, divides the coil housing into three compartments: one for each
electrode and one for the coils. Should a damaged liner or electrode fault
allow process fluid to migrate behind the electrode seals, the fluid is contained
in the electrode compartment. The sealed electrode compartment prevents
the process fluid from entering the coil compartment where it would damage
the coils and other internal components.
The electrode compartments are designed to contain the process fluid at full
line pressure. An o-ring sealed cover provides access to each of the electrode
compartments from outside the sensor; drainports are provided in each cover
for the removal of fluid.
NOTE
The electrode compartment could contain full line pressure and it must be
depressurized before the cover is removed.
Figure 5-19. Housing
Configuration — Sealed
Electrode Compartment (Option
Code W3)
If necessary, capture any process fluid leakage, connect the appropriate
piping to the drainports, and provide for proper disposal (see Figure 5-19).
Fused Glass Seal
Sealed Electrode Compartment
1
/2 - 27 NPT
O-Ring Seal
Optional:
Use drain port to
plumb to a safe area
(Supplied by user)
Grounding Electrode Port