MULTICAL®603
KamstrupA/S∙Technicaldescription∙5512‐2029
A1_GB
06.2017
121
Thelimitationsconnectedtotheuseof2‐wiresensorpairsaccordingtoEN1434‐2:2015appearfromthetablebelow.
Cablecross
sectionmm
2
Pt100sensors Pt500sensors
Maxcablelength
m
Subjectto
EN1434‐2:2015
Temperatureincrease
K/m
Copper@20C
Maxcablelength
m
Subjectto
EN1434‐2:2015
Temperatureincrease
K/m
Copper@20C
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
1.50 15.0 0.067 75.0 0.013
Table6
4‐wiresensorset
Forinstallationsrequiringlongercablelengthsthanstatedinthetableabove,itisrecommendedtouse4‐wire
sensorsetsaswellasMULTICAL
603type603‐B/D/Gwith4‐wireconnection.
The4‐wireconstructionusestwoconductorsforthemeasuringcurrentandtwootherconductorsforthemeasuring
signal,whichmeansthattheconstructionintheoryisuninfluencedbylongsensorcables.Inpractice,cablesought
nottobelongerthan100
m,anditisrecommendedtouse4x0.25mm
2
.
Theconnectioncableoughttohaveanouterdiameterof5‐6mminordertoobtainoptimumtightnessofboth
MULTICAL
603andthescrew‐jointforthe4‐wiresensor.Theisolationmaterial/coverofthecableoughttobe
selectedonthebasisofthemaximumtemperatureintheinstallation.PVCcablesarenormallyusedupto80C,and
forhighertemperaturessiliconecablesareoftenused.