MULTICAL®
403
Kamstrup
A/S
∙
Technical
description
∙
5512
‐
1689_B1_GB_03.2017
49
4.8
Sealing
According
to
EN
1434
MULTICAL®
403
must
have
protection
devices,
which
can
be
sealed
to
the
effect
that
after
sealing,
both
before
and
after
the
heat
meter
has
been
correctly
installed,
it
is
impossible
to
dismount,
remove
or
change
the
heat
meter
or
its
adjustment
devices
without
visibly
damaging
meter
or
sealing.
Correct
sealing
of
MULTICAL®
403
includes
two
levels,
installation
sealing
and
verification
sealing;
a
breaking
of
the
sealing
has
different
consequences
on
each
level.
Installation
sealing
Having
completed
the
installation
of
MULTICAL®
403
installation
sealing
is
the
last
thing
to
be
done.
The
installation
seal
is
the
‘outermost’
sealing
level
to
be
completed
by
the
installer/utility.
The
Installation
sealing
must
make
sure
that
calculator
top
and
base
cannot
be
separated
and
that
flow
sensor
and
temperature
sensors
cannot
be
dismounted
without
visible
signs
that
a
separation
has
taken
place.
In
practice
the
installation
sealing
can
be
done
by
means
of
wire
and
seal,
sealing
label
or
a
combination
of
the
two.
The
sealing
is
the
utility’s
security
that
unauthorized
persons
cannot,
undiscovered,
change
the
installation
around
the
meter.
Breaking
the
installation
sealing
alone
does
not
influence
the
meter’s
possibility
of
renewed
installation
sealing,
or
the
fact
that
it
is
legal
in
relation
to
its
approval
and
verification.
Installation
sealing
and
SETUP
loop
In
order
to
bring
MULTICAL®
403
back
to
SETUP
loop
after
installation,
calculator
top
and
base
must
be
separated,
after
which
SETUP
loop
can
be
accessed
either
via
front
keys
or
via
METERTOOL
HCW.
Separation
of
calculator
top
and
base
implies
that
the
calculator’s
installation
seal
is
broken.
Verification
seal
The
verification
sealing
of
MULTICAL®
403
consists
of
both
mechanical
and
electronical
sealing.
The
verification
seals
marked
“LOCK”
and
“TEST”
are
placed
on
the
grey
verification
cover
in
the
calculator
top.
These
seals
can
be
seen
as
the
‘innermost’
sealing
level,
which
may
only
be
broken
by
authorized
laboratories
in
connection
with
test
and
reverification
of
the
meter.
If
the
meter
is
to
be
used
for
legal
operation
in
relation
to
approval
and
verification
after
breaking
of
the
verification
sealing,
the
broken
seals
must
be
resealed.
The
sealing
must
be
carried
out
by
an
authorized
laboratory
using
the
sealing
mark
(void
label)
of
the
laboratory.
4.9
Pressure
loss
Pressure
loss
in
a
flow
sensor
is
stated
as
max.
pressure
loss
at
q
p
.
According
to
EN
1434
maximum
pressure
must
not
exceed
0.25
bar.
The
pressure
loss
in
a
sensor
increases
with
the
square
of
the
flow
and
can
be
stated
as:
p
kv
Q
where:
Q
=
volume
flow
rate
[m³/h]
kv
=
volume
flow
rate
at
1
bar
pressure
loss
[m³/h]
p
=
pressure
loss
[bar]