Kamstrup MULTICAL 302 User manual

Kamstrup A/S · Industrivej 28, Stilling · DK-8660 Skanderborg · T: [phone] · [e-mail] · kamstrup.com
Installation and User Guide
MULTICAL® 302

2 Kamstrup A/S • 55121351_D2_GB_04.2015
MULTICAL® 302
MID designations
Permissible operating conditions / measuring ranges
Clcultor q: 2 °C…150 °C DΘ: 3K…130K
Temperture sensor set q: 2 °C…150 °C DΘ: 3K…130K
Flow sensor q: 2 °C…130 °C
Also vilble s cooling meter with temperture rnge 2 °C...150 °C (lterntively 2 °C...50 °C) or
s combined het/cooling meter with temperture rnge 2 °C...150 °C, however with MID
pprovl on the het register only.
Mechanical environment
M1 nd M2 (fixed instlltion with minimum vibrtion nd fixed instlltion with considerble or
high vibrtion level, respectively).
Electromechanical environment
E1 (housing/light industry). The meter’s signl cbles must be drwn with  minimum distnce of
25 cm to other instlltions.
Climatic environment
Instlltion must tke plce in environments with non-condensing humidity nd in closed
loctions (indoors). The mbient temperture must be within 5 °C…55 °C. The flow sensor, however,
my be instlled in condensing environments.
Maintenance and repair
The flow sensor nd the temperture sensors must not be seprted from the clcultor. Repirs
require subsequent reverifiction in n ccredited lbortory.

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Contents
1 Generl informtion 3
2 Temperture sensors 4
2.1 Mounting of temperture sensors 4
2.2 Coupling for direct sensor 4
3 Informtion codes "INFO" 5
4 Mounting of flow sensor 6
4.1 Wll mounting of MULTICAL® 302 7
4.2 Flow direction 8
4.3 Instlltion position 8
4.4 Humidity nd condenstion 8
5 Mounting of clcultor 9
5.1 Compct mounting 9
5.2 Wll mounting 10
5.3 Position of clcultor 10
6 Bttery supply 10
7 Testing the function 11
8 Communiction 11
8.1 Wired M-Bus communiction 11
8.2 Wireless M-Bus communiction
(rdio) 11
9 Setup Mode 12
9.1 Chnging the instlltion position 13
9.2 Chnging the energy unit 14
1 General information
Please read this guide carefully before installing the energy meter.
In case of incorrect mounting, Kamstrup's guarantee obligations no longer apply.
Note tht the following instlltion conditions must be obeyed:
- Pressure stge: PN16/PN25, see mrking. The flow sensor mrking does not pply to
enclosed ccessories.
- Pressure stge
sensor set type Ø 5.2: PN16 nd PN25
At medium tempertures bove 90 °C, nd below 15 °C, nd the clcultor should be wll-
mounted.

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2 Temperature sensors
The temperture sensors used to mesure inlet nd outlet tempertures, respectively, re 
mtched sensor set tht must never be seprted.
Temperture sensors re mounted in MULTICAL® 302 from the fctory. According to EN 1434, the
cble length must not be chnged.
The temperture sensor which is mounted in the flow sensor from the fctory hs no mrking on
the sensor cble. The other sensor, which is mrked with  green plstic ring, must be mounted in
the "opposite" pipe compred to the flow sensor.
2.1 Mounting of temperature sensors
MULTICAL® 302 comes with  Ø 5.2 mm Pt500 sensor pir (mtched sensors) with 1.5 m silicone
cble. This sensor type cn be used s direct sensor using  coupling nd n O-ring nd s pocket
sensor to be mounted in  sensor pocket.
One temperture sensor is mounted in the flow sensor from the fctory. The other sensor ought to
be mounted s direct sensor. Alterntively, both sensors must be mounted in sensor pockets s
symmetricl sensor instlltion gives the best mesuring result. If one of the sensors is not to be
mounted in the flow sensor, it must insted be mounted s close to the outlet of the flow meter s
possible so tht the distnce between the flow sensor nd the temperture sensor is mx. 12 cm.
Asymmetricl sensor instlltion (one direct sensor nd one pocket sensor) is only dvisble
where ntionl regultions llow this, nd never in systems with low differentil temperture nd/
or low wter flow.
Example:
If the disply shows tht the flow sensor is to
be mounted in the inlet pipe, the sensor with
the green plstic ring must be mounted in the
outlet pipe.
2.2 Coupling for direct sensor
Slide the enclosed plstic coupling into plce
from the end of the sensor tube until you feel
 click when the coupling hs reched the first
knurling.

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The coupling must not be pushed further down
thn the first knurling.
No mtter where the direct sensor is instlled,
it is very importnt tht you observe the tole-
rnces stted in the drwing to the left. If not,
the O-ring my not provide correct seling.
9 -
0
0,1
0
Ø 9 -0,1
3 Information codes "INFO"
MULTICAL® 302 constntly monitors  number of importnt functions. If there is  serious error in
the mesuring system or instlltion,  flshing "INFO" is displyed, nd n info code cn be red
by ctivting the push-button until the mesuring unit displys "INFO". The info code is only shown
if n error hs occurred, unless the meter is configured for "sttic info codes".
Info code Description Response time
0 No irregulrities -
1 Supply voltge hs been interrupted -
4 Temperture sensor T2 outside mesuring rnge < 32 secs.
8 Temperture sensor T1 outside mesuring rnge < 32 secs.
32 Temperture difference hs wrong polrity < 32 secs. nd 0.05 m3
128 Supply voltge too low < 10 secs.
16 Flow sensor with wek signl or ir < 32 secs.
2Flow sensor with wrong flow direction < 32 secs.
If more thn one info code ppers t  time, the sum of info codes is displyed. If e.g. both
temperture sensors re outside mesuring rnge, info code 12 (info codes 4+8) is displyed.
Info codes 4 nd 8 re set when the temperture flls below 0.00 °C or exceeds 155.00 °C. Info
codes 4 nd 8 re lso set for short-circuited nd disconnected sensors.
Note: If Info = 4 or 8, the meter's energy clcultion nd volume ccumultion stop.

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4 Mounting of flow sensor
Prior to instlltion of the flow sensor, the
system should be flushed nd protection
plugs/plstic diphrgms removed from the
flow sensor.
Correct flow sensor position (inlet or outlet)
ppers from the disply of MULTICAL® 302.
The flow direction is indicted by n rrow on
the side of the flow sensor.
The flow sensor my be used in both PN16 nd
PN25 instlltions nd is vilble mrked
either PN16 or PN25 or mrked both PN16 nd
PN25, s required.
AA
SECTION A-A
SCALE 2 : 1
Tightening by hnd
O-ring
Gsket
12 mm
Enclosed couplings, if ny, re only intended for PN16. Suitble PN25 couplings must be used in
PN25 instlltions.
In connection with G¾x110 mm, it must be checked tht 12 mm thred run-out is sufficient. See
figure below.
Stright inlet: MULTICAL® 302 requires neither stright inlet nor stright outlet to meet the Me-
suring Instruments Directive (MID) 2004/22/ EF nd EN 1434:2007. A stright inlet section is only
necessry in cse of hevy flow disturbnces before the meter. It is recommended to follow the
guidelines of CEN CR 13582.
A Recommended flow sensor position
B Recommended flow sensor position
C Uncceptble position due to risk of ir
build-up
D Acceptble position in closed systems
E A flow sensor should not be plced
immeditely fter  vlve, except for block
vlves, which must be fully open when not
used for blocking
F A flow sensor should not be plced close to
the inlet side of  pump
G A flow sensor should not be plced close to
 two-level double bend.
A
B
C
D
E
F
G
In order to prevent cvittion, the operting pressure t MULTICAL® 302 must be min. 1 br t qp
nd min. 2 br t qs. This pplies to tempertures up to pprox. 80 °C.
MULTICAL® 302 must not be exposed to pressure lower thn the mbient pressure (vcuum).

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MULTICAL® 302
4.1 Wall mounting of MULTICAL® 302
MULTICAL® 302 cn be mounted verticlly,
horizontlly or t n ngle.
90° 90°
90° 90°
90°
90°
90°
90°
MULTICAL® 302 my be turned upwrds to mx
45° nd downwrds to mx 90° compred to
the pipe xis.
45°
45°
90°
90°
45°
45°
90°
90°
Important!
The meter is most sensitive to ir bubbles in the
wter when the plstic cse points upwrds.
Therefore, this mounting position ought only
to be used in instlltions with high operting
pressure nd utomtic ventiltion like e.g.
direct connected district heting.

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MULTICAL® 302
4.2 Flow direction
When the meter is instlled in the ppliction,
it must be ensured tht the flow direction is
correct.
Flow direction out of the figure – the direction is
indicted on the flow sensor.
Flow direction into the figure – the direction is
indicted on the flow sensor.
4.3 Installation position
In the upper left corner of the meter disply, n
icon indictes if the meter is positioned in the
inlet or outlet pipe.
It is very importnt to ensure tht the meter
is correctly positioned s either inlet meter or
outlet meter. The instlltion position of the
meter cn be chnged in the Setup Mode (for
further informtion, see prgrph 9.1, pge
13).
Icon for inlet meter
Icon for outlet meter
4.4 Humidity and condensation
If MULTICAL® 302 is instlled in moist
environments, it must be turned 45° compred
to the pipe xis, s shown in the drwing to the
left.
45°
45°

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MULTICAL® 302
5 Mounting of calculator
5.1 Compact mounting
The clcultor is mounted directly on the
flow sensor. The clcultor is seled from
the fctory, nd therefore, further seling is
unnecessry, unless the sels on the bck of
the clcultor hve been broken.
In cse of strong condenstion (e.g. cooling
pplictions), wll mounting of the clcultor is
recommended, see prgrph 5.2, pge 10.
83
24 59
83
24 59
In connection with compct mounting the cble
binder Aon the flow cble cn be removed by
relesing the cble binder A. Subsequently
insert the cble binder through one of the
mounting eyes Bnd drw it round the cble
C. Finlly the cble binder is strpped round
the flow cble gin tying the cble to the flow
sensor D.
A
B
C
D

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MULTICAL® 302
5.2 Wall mounting
The wll fitting mkes it possible to mount
MULTICAL® 302 directly on n even wll. Use
the fitting s  templte to mrk nd drill two 6
mm holes in the wll.
43
47
47
24
24
8
47
47
24
24
8
47
24
24
47 8
43
5.3 Position of calculator
If the flow sensor is mounted in  humid or
condensing environment, the clcultor must
be plced in  higher position thn the flow
sensor.
6 Battery supply
MULTICAL® 302 is bttery-supplied with either 1 or 2 A-cell btteries. Optiml bttery lifetime is
obtined by keeping the bttery temperture below 30 °C, e.g. by wll mounting.
The voltge of  lithium bttery is lmost constnt throughout the lifetime of the bttery
(pprox. 3.65 V). Therefore, it is not possible to determine the remining cpcity of the bttery by
mesuring the voltge. However, INFO code 128 indictes tht the bttery voltge is too low.
The bttery cnnot nd must not be chrged nd must not be short-circuited. Used btteries must
be hnded in for pproved destruction, e.g. to Kmstrup A/S.

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7 Testing the function
Crry out n opertionl check when the energy meter hs been fully mounted. Open thermo-
regultors nd cocks to estblish wter flow through the heting system. Press the push-button of
MULTICAL® 302, nd check tht the displyed vlues for tempertures nd wter flow re credible
vlues.
8 Communication
MULTICAL® 302 cn be delivered with or without remote communiction. If the meter is
delivered with remote communiction, it cn be either wired M-Bus or wireless M-Bus
(rdio communiction).
8.1 Wired M-Bus communication
If the meter is supplied with built-in wired M-Bus, M-Bus protocol ccording to EN 13757-3:2013 is
used.
The connection to the M-Bus mster tkes plce vi the fixed 2-wire cble of 1,5 m. The connection
is independent of polrity, nd the M-Bus interfce is glvniclly seprted from the rest of the
meter.
M-Bus comes with primry, secondry nd enhnced secondry ddressing. The M-Bus ddress
is indicted t the plcing of the order, but cn subsequently be chnged in the Setup mode (see
prgrph 9, pge 12).
8.2 Wireless M-Bus communication (radio)
If the meter hs integrted wireless M-Bus, it is possible to select between Mode C1 or Mode T1
OMS. Mode C1 is used in connection with Kmstrup's reding systems nd in generl for drive-by
meter reding. Mode T1 OMS is used in connection with OMS-bsed sttionry networks.
The meter hs n internl ntenn.
Mode C1
Protocol ccording to EN 13757-4:2013. Trnsmission intervl 16 secs. Individul 128-bit AES
encryption.
Mode T1 OMS
Protocol ccording to EN13757-4:2013 nd OMS Specifiction, Volume 2, Issue 3.0.1. Trnsmission
intervl of 900 secs. Individul 128-bit AES encryption.

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9 Setup Mode
Setup
When delivered, the meter is in trnsport stte,
which mens tht the disply loop "Setup" is
vilble.
The Setup loop is selected by ctivting the button
continuously for 9 secs. until "SETUP" is displyed.
The meter remins in Setup loop until the front
button is pressed for 5 secs. However,  time-
out secures tht the meter reverts from Setup
mode to norml mode fter 4 minutes.
The redings of Setup loop re listed below including index numbers:
Setup loop (Loop_3) Index number
in display
1.0 Customer number (No. 1) 3-01
2.0 Customer number (No. 2) 3-02
3.0 Dte 3-03
4.0 Hour 3-04
5.0 Trget dte (MM.DD) 3-05
6.0 Flow sensor in: Inlet or Outlet (code A) 3-06
7.0 Mesuring unit nd resolution (code B) 3-07
8.0 M-Bus primry ddress (No. 31) 3-08
9.0 Averge time of mx P nd Q 3-09
10.0 hc (can only be changed with country code 6xx. Other country codes show
180 °C without the changing option)
3-10
11.0 Rdio "ON" or "OFF" 3-11
12.0 End setup 3-12
After 4 minutes without ctivtion of the button, the meter reverts to energy reding in the User
loop.

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9.1 Changing the installation position
The meter is configured for mounting in either flow or return pipe from the fctory.
The setup of the meter's instlltion position cn be chnged from inlet meter to outlet meter (nd
vice vers):
For this purpose, disply 3-06 is used. Now, the following is to be crried out:
Inlet
If the meter is set to be plced in the inlet,
the text "inlet" is displyed. In order to chnge
the setting, press the button for two seconds.
"Setup" is briefly displyed, nd then "Inlet"
flshes. Press the button once, nd "Outlet" is
displyed. If you wnt to sve the setting, press
the button for two seconds until "OK" ppers in
the disply.
Outlet
If the meter is set to be plced in the outlet,
the text "Outlet" is displyed. In order to chnge
the setting, press the button for two seconds.
"Setup" is briefly displyed, nd then "Outlet"
flshes. Press the button once, nd "Inlet" is
displyed. If you wnt to sve the setting, press
the button for two seconds until "OK" ppers in
the disply.
Trnsport stte ends when the meter hs
registered its first volume ccumultion, either
0.01 m3(10 L) or 0.001 m3(1 L) – determined by
the selected resolution.
When the trnsport mode hs been cncelled,
you only hve ccess to the Setup loop if the
instlltion sel is broken nd the contct
points behind the sel re short-circuited.
Note: The option Setup hs been deselected in certin country codes.

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9.2 Changing the energy unit
The energy unit cn be chnged. In order to do so, follow the exmple in prgrph 9.1, pge 13,
but insted of reding 3-06, reding 3-07 is to be used.
If you chnge the energy unit setting in Setup loop, you must be wre tht the chnge cn
influence the most significnt digits of the disply. If for instnce you chnge from GJ with 2
decimls to GJ with 3 decimls, the most significnt digit disppers. The sme pplies if you
chnge from kWh without decimls to kWh with 1 deciml. And conversely, the lest significnt
digit disppers if e.g. you chnge from kWh with 1 deciml to kWh without decimls. See
exmples below:
Exmple 1
GJ with 2 decimals (B=2)
This is n exmple of how the energy reding E1
cn pper – counted in GJ.
Exmple 2
GJ with 3 decimals (B=6)
Here the most significnt digit hs disppered
compred to exmple 1. In return you receive 
higher resolution.
Exmple 3
kWh without decimals (B=3)
This is n exmple of how energy reding E1
cn pper – counted in kWh.
Exmple 4
kWh with 1 decimal (B=7)
Here the most significnt digit hs disppered
compred to exmple 3. In return you receive 
higher resolution.
Exmple 5
MWh with 3 decimals (B=4)
In principle, this is the sme resolution s in
exmple 3, but energy is now counted in MWh.

Consumed energy in
kWh, MWh or GJ.
Consumed district heating water.
Number of operating hours.
Current inlet temperature.
Current heat power.
Current differential
temperature.
Current information code
(contact your utility if the value
differs from "0").
Current water flow.
The eight most significant
digits of the customer number.
The eight least significant
digits of the customer number.
Current outlet temperature.
Energy measurement
MULTICAL® 302 functions in the following wy:
The flow sensor registers the mount of district heting wter flowing through the heting
system in m3(cubic metres).
The temperature sensors plced in inlet nd outlet pipes register the cooling, i.e. the
difference between input nd output tempertures.
MULTICAL® 302 clcultes consumed energy bsed on volume of district heting wter nd
cooling.
Readings
The disply is ctivted by pressing the front button. Then, press the button to chnge to
nother disply.
Four minutes fter the ltest ctivtion of the front key, the meter utomticlly switches to
consumed energy.
Display readings
DDD=210
Furthermore, see interactive user's guides at www.kamstrup.com
Kamstrup A/S • 55121351_D2_GB_04.2015

Kamstrup A/S · Industrivej 28, Stilling · DK-8660 Skanderborg · T: [phone] · [e-mail] · kamstrup.com
User Guide
MULTICAL® 302
Kamstrup A/S • 55121351_D2_GB_04.2015