Kamstrup MULTICAL 603 - Information Code Types

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conduc tors 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
th ereasonfortheerrorhas 
beenremoved.
Note:Configurationfor”Manualresetofinfocode”isnotpossibleinMULTICAL®603
