Honeywell SMV 3000 - Manual (Page 113)

1/99 SMV 3000 Transmitter User’s Manual 101
9.3 Inspecting and Cleaning Barrier Diaphragms
Background Depending on the characteristics of the process medium being measured,
sediment or other foreign particles may collect in the process head
cavity/chamber and cause faulty measurement. In addition, the barrier
diaphragms in the transmitter’s meter body may become coated with a
residue from the process medium.
In most cases, you can readily remove the process heads from the
transmitter’s meter body to clean the process head cavity and inspect the
barrier diaphragms.
Procedure The procedure in Table 27 outlines the general steps for inspecting and
cleaning barrier diaphragms.
Table 27 Inspecting and Cleaning Barrier Diaphragms
Step Action
1 Close all valves and isolate transmitter from process. Open vent in
process head to drain fluid from transmitter’s meter body, if required.
ATTENTION We recommend that you remove the transmitter from
service and move it to a clean area before taking it apart.
2 Remove nuts from bolts that hold process heads to meter body.
Remove process heads and bolts.
22520
Nuts
Bolts
Process
head
Center
section
Process
head
O-ring
O-ring
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