MULTICAL®
603
104
Kamstrup
A/S
∙
Technical
description
∙
5512
‐
2029_A1_GB_06.2017
2
‐
wire
sensor
connection
MULTICAL
603
‐
A
has
2
‐
wire
Pt100
connection,
whereas
MULTICAL
603
‐
C/E/F
has
2
‐
wire
Pt500
connection.
It
applies
to
all
2
‐
wire
sensor
connections
that
the
cable
lengths
and
cross
sections
of
the
two
sensors
which
are
used
as
temperature
sensor
pair
for
a
heat
or
cooling
meter
must
always
be
identical,
and
that
cable
sensors
must
neither
be
shortened
nor
extended.
The
limitations
connected
to
the
use
of
2
‐
wire
sensor
pairs
according
to
EN
1434
‐
2
appear
from
the
table
below.
In
addition,
the
table
indicates
how
big
error
the
longer
2
‐
wire
cables
will
result
in.
Kamstrup
supplies
Pt500
sensor
sets
with
up
to
10
m
cable
(2
x
0.25
mm
2
).
Cable
cross
section
mm
2
Pt100
sensors
Pt500
sensors
Max
cable
length
m
Error
display
1)
K/m
Max
cable
length
m
Error
display
1)
K/m
0.25
2.5
0.450
12.5
0.090
0.50
5.0
0.200
25.0
0.040
0.75
7.5
0.133
37.5
0.027
Table 5
1)
The error is calculated for copper cable at 20 °C. At higher cable temperatures, the error will be bigger.
MULTICAL
603
has
a
temperature
sensor
offset
function,
see
paragraph
7.3,
which
can
be
used
to
reduce
the
error
that
derives
from
the
cable
resistance
and
the
zero
error
of
the
sensors.
4
‐
wire
sensor
set
For
installations
requiring
longer
cables
than
listed
in
the
table
above,
it
is
recommended
to
use
4
‐
wire
sensor
sets.
MULTICAL
603
‐
B
has
4
‐
wire
Pt100
connection,
whereas
MULTICAL
603
‐
D/G
has
4
‐
wire
Pt500
connection.
MULTICAL
603
has
a
“real”
4
‐
wire
construction,
which
uses
two
conductors
for
the
measuring
current
and
two
other
conductors
for
the
measuring
signal,
which
means
that
the
construction
is
in
theory
uninfluenced
by
long
sensor
cables.
In
practice,
cables
ought
not
to
be
longer
than
100
m,
and
it
is
recommended
to
use
4
x
0.25
mm
2
.
7.7
Information
code
types
MULTICAL®
603
constantly
monitors
a
number
of
important
functions.
If
a
serious
error
occurs
in
measuring
system
or
installation,
a
flashing
“INFO”
will
appear
in
the
display.
The
”INFO”
field
keeps
flashing
as
long
as
the
error
is
present
no
matter
which
reading
you
choose.
The
”INFO”
field
automatically
disappears
when
the
reason
for
the
error
has
been
removed.
Note:
Configuration
for
”Manual
reset
of
info
code”
is
not
possible
in
MULTICAL®
603
Содержание MULTICAL 603
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