Kamstrup MULTICAL 603 Technical Description

MULTICAL®603
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KamstrupA/S∙Technicaldescription∙5512‐2029
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A1_GB
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06.2017
99
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7.3 Offsetadjustmentoftemperature sensormeasurement
MULTICAL®603isavailablewithpossibleoffsetadjustmentofthetemperaturesensormeasurement,thus
increasingtheaccuracyoftheabsolutetemp eraturemeasurement.Thisisespeciallyrelevantintheinstallation
scenariothatthemeteristobeusedfortariffbillingbasedonabsolutetemperatures.Inthatcase,itisanEN1434

requirementthattheaccuracyofthemeter’sabsolutetemperaturereadingmustbewithin±1.0K.Offset
adjustmentisextremelyrelevantindistrictcoolinginstallationstoo.Indistrictcoolinginstallationsthecustomer
oftenrequiresamaximuminlettemperature.Absolutetemperaturemeasurementmeasuringwithundesirable
inaccuracycancausethesupplierto
supplywaterwithalowerinlettemperaturethanpromised,resultingin
unnecessaryextracostsforthesupplier.
Dependingonthemeter’sconfiguration,theoffsetadjustmentcanbeprogrammedintothemeterfromthefactory.
Inaddition,offsetcanbeadjustedafterdeliveryviathemeter’sSETUPloop(seeparagraph6.3)or
viaMETERTOOL
HCW(seeTechnicaldescription5512‐2096).
Note:Dependingonthe meter’sconfiguration,theoffsetadjustmentcanbedisabled,andinthiscase,themenu
itemintheSETUPloopwilldisplay“Off”.
Ifthetemperaturesensor pairofameterwithoffsetadjustmentisreplaced,itisrecommended
tocorrecttheoffset
tomatchthenewlyconnectedsensorpair.Alternatively,offsetshouldbeadjustedto0.00K,whichmeansthatthe
functionisswitchedoffanddoesnotcontributetoanundesirableincreaseoftheerroroftheabsolutetemperature
measurements.Notethattheoffsetadjustmentinfluencesconnectedtemperature
sensorsonbotht1,t2andt3.
Temperaturesensoroffset(t
r0
)canbeadjustedintheinterval‐0.99…0.99Kaccordingtothemeter’sapproval.
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Pleasebeawarethattherequiredoffsetadjustmentmustbeentered,nottheerrorofthetemperaturesens orpair.
Iftheselectedtemperaturesensorpaircontributeswithanerrorof‐0.20K,themeter’soffsetmustbesetat0.20K.

Kamstrup MULTICAL 603 Specifications

General

Flow Sensor	Ultrasonic
Battery Life	Up to 16 years
Power Supply	Battery
Communication Options	M-Bus, Wireless M-Bus, Modbus, BACnet
Display	LCD
Application	Heating and Cooling
Pressure Rating	PN16
Approval	MID
Accuracy	Class 2
Ambient Temperature Range	55°C
Housing Material	Brass