TP0003B
BM BULKMETER
Chap 6
Page 1
FAULT FINDING
Chapter 6
FAULT FINDING
1
GENERAL
1.1
1.2
1.3
Because
of
the
simple
robust
design
of
the
bulkmeter,
in
most
instances
fault
finding
is
limited
to
the
location
and
rectification
of
leaks.
The
following
table
lists
faults
that
may
be
more
difficult
to
diagnose,
their
possible
cause(s)
and
remedy.
In
cases
where
the
accuracy
of
the
meter
is
in
doubt,
testing
and
calibration
as
in
Chapter
5
Para
13
is
to
be
carried
out.
If
such
calibration
proves
ineffective
the
bulkmeter
should
be
removed
from
service
and
returned
to
Liquid Controls
for
overhaul
and
repair.
If
this
is
not
practical,
the
appropriate
procedures
described
in
Chapter
5
may
be
carried
out
by
a
suitably
qualified
person
providing
full
workshop
facilities
are
available.
It
must
be
remembered
that
the
fault
table
is
a
guide
only
and
may
not
cover
all
possible
faults.
Operation
and
maintenance
procedures
correctly
carried
out
should
keep
faults
to
a
minimum.
TABLE 1 - FAULT FINDING
FAULT
POSSIBLE CAUSE(S)
REMEDY
No flow
Zero line pressure
Investigate system and rectify.
Control valve closed
Open control valve.
Seized Bulkmeter rotor
Refer to Chapter 5, dismantle
clean, inspect and renew
components as necessary.
Reassemble and test.
Reduced/Erratic Flow
Fluctuating line pressure
Investigate system and rectify.
Control valve not fully open
Open control valve.
Partially seized rotor
Refer to Chapter 5, dismantle
clean, inspect and renew
components as necessary.
Reassemble and test.
Overspeeding
System not bled free of air/vapour
Bleed system. If fault persists
consider fitting air separator
upstream of meter.
Rate of flow indicator contaminated Ingress of water to calibrating
mechanism
Calibrating mechanism overfilled
with oil
Locate and cure the leak.
Lubricate calibration mechanism
with GREASE (see Chapter 4).
Renew Rate of flow indicator.
Содержание Avery-Hardoll BM Series
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