oventrop OV-DMC 2 User manual

Valves, controls + systems
Operating instructions
Flow meter
“OV-DMC 2”

2
Subject to modification without notice. Oventrop does not accept liability for the accuracy
of the OV-DMC flow meter readings.

3
Contents
Page
Content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Characteristic lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Content of measuring case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Component connection diagram/Battery case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Main menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
System-Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Measurement-Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Valve-Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Temperature measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Temperature input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Balanced pressure method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Data Logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Kv-value-method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Computer-method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Permanent measurement of “Cocon”/“Cocon 4” valves and metering stations . . . . . . . . . . . . . . . . . . . . . . .19
Permanent measurement of differential pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
OV-Balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Storage and printing of valve data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
xample . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Locking Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Functional messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
rror messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

4
General information
General information:
The flow meter “OV-DMC 2” was specially designed for flow measurements and the hydronic balancing of
heating and cooling systems. In practice, operation off the line is guaranteed by using rechargeable batte ries.
To facilitate handling, null balance is automated. This process of changeover to the measuring position of the
measuring head is taken over by an electric motor which is automatically triggered by the flow meter during
each measurement. This step largely protects the measuring head against any damage. To protect the mea-
suring head from contamination, the inlet and outlet nipple are provided with integrated strainer inserts. Nip-
ples for replacement are supplied with each flow-meter (see part 17, page 7) and can be replaced by using a
standard spanner (spanner size 17 mm). Spare part number of the nipples for subsequent ordering:
106 91 86.
Attention:  Before the measuring hoses are connected to the double regulating and
commissioning valve, the flow meter has to be connected to the measuring head and
has to be switched on.
 Provide for free water flow through measuring hoses. Clean or replace strainer inserts
of the measuring hose in case of heavy pollution.
For further details regarding function sequences see page 12 and onwards.
The logical structure and the consequent query on the display offer a good condition to carry out hydronic
balancing of existing installations without calculation. Presetting of a double regulating and commissioning
valve can be calculated by using the balanced pressure method, computer method or OV balance method
after having entered the valve size and the nominal flow rate. The presetting values of individual double regu-
lating and commissioning valves can be calculated on the basis of the characteristic lines of all Oventrop
double regulating and commissioning valves as well as those of some competitors which are stored in the
flow meter (see list on next page).
When using the “OV-DMC 2” for the regulation of valves which are not produced by Oventrop, the corres -
ponding kv-value has to be entered before the first measurement. To do so, the kv-value method is chosen in
the menu "Measurement-Setup”. Any data obtained during measurement is stored in the “OV-DMC 2” and
can be processed via a PC under Windows which guarantees the filing of any data obtained during hydronic
balancing. Moreover, temperature can be measured by using the flow meter. To do so, the sensor is
introduced into the pressure test points at the double regulating and commissioning valve “Hydrocontrol”. As
for the double regulating and commissioning valves “Hycocon”, the temperature must be seized at the pipe-
work or the valve body.

5
Characteristic lines
Characteristic lines:
Characteristic lines of the Oventrop valves:
Indicated display
Double regulating and commissioning valves “Hycocon V, VTZ, VPZ” DN 15 to DN 40 Hycocon V
Regulating valves “Hycocon T, TZ” DN 15 to DN 25 Hycocon T
Regulating valves “Hycocon TM, HTZ” DN 15 to DN 40 Hycocon TM
Regulating valves “Hycocon TM, HTZ, ” Bronze kvs 5.0 DN 20 Hyco.TM RG
Regulating valves “Aquastrom C” DN 15 to DN 32 AquastromC
Double regulating and commissioning valves “Hydrocontrol R, VTR, VPR” DN 10 to DN 65 Hydroc. R
Double regulating and commissioning valves “Hydrocontrol G, VGC” DN 65 to DN 300 Hydroc. G
Double regulating and commissioning valves “Hydrocontrol F, VFC” DN 20 to DN 400 Hydroc. F
Double regulating and commissioning valves “Hydrocontrol FR, VFR” DN 50 to DN 200 Hydroc. FR
Double regulating and commissioning valves “Hydrocontrol FS, VFN” DN 65 to DN 300 Hydroc. FS
Double regulating and commissioning valves “G-86” DN 10 to DN 65 (Swedish market) G- 86
Double regulating and commissioning valves “RF-93” DN 20 to DN 300 (Swedish market) RF- 93
Regulating valve for chilled ceiling installations “Cocon 2TZ” kvs 0.45 DN 15 Coconkv045
Regulating valve for chilled ceiling installations “Cocon 2TZ” kvs 1.0 DN 15 Coconkv1.0
Regulating valve for chilled ceiling installations “Cocon 2TZ” kvs 1.8 DN 15 Coconkv1.8
Regulating valve for chilled ceiling installations “Cocon 2TZ” kvs 4.5 DN 20 Coconkv4.5
Four-port regulating valve “Cocon 4 TZ ” kvs 0.45 DN 15 Cocon4-045
Four-port regulating valve “Cocon 4TZ” kvs 1.0 DN 15 Cocon4-1.0
Four-port regulating valve “Cocon 4 TZ” kvs 1.8 DN 15 Cocon4-1.8
Brass metering station LF kvs 0.55 DN 15 met.st.LF
Brass metering station MF kvs 1.2 DN 15 met.st.MF
Brass metering station DN 15 to DN 50 /
Flanged stainless steel metering station DN 65 to DN 900 met.st.
Flanged cast iron metering station DN 65 to DN 300 met.st.CI
Characteristic lines of other valves:
Tour & Andersson (stored values taken from the catalogue 1999)
Flanged valve type “STAF” DN 20 to DN 300 STAF
Flanged valve type “STAF-SG” DN 20 to DN 300 STAF-SG
Flanged valve type “STAF-R” DN 65 to DN 150 STAF-R
Groove end valve type “STAG” DN 65 to DN 300 STAG
Female threaded valve type “STA” DN 15 to DN 50 STA
Female threaded valve type “STAD” DN 10 to DN 50 STAD
Male threaded valve type “STADA” DN 10 to DN 50 STADA
Female threaded valve type “STA-DR” DN 15 to DN 25 STA-DR
Crane (stored values taken from the catalogue 2000):
Double regulating and commissioning valves:
Fig.-No. D 930: DN 10 to DN 50 D930
Fig.-No. DM 930: DN 20 to DN 300 DM930
Metering stations/combinations metering stations/valves:
Fig.-No. D 901/D 941/D 931: DN 15 to DN 50
D901/D941/D931
Fig.-No. D 902/D 942: DN 15 D902/D942
Fig.-No. D 932: DN 15 D932
Fig.-No. D 933: DN 15 D933
Fig.-No. D 934: DN 15 D934
Fig.-No. DM 900/DM 940: DN 20 to DN 300 DM900/DM940
Fig.-No. DM 950: DN 50 to DN 300 DM950

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Characteristic lines
Hattersley (stored values taken from the catalogue 2000):
Double regulating and commissioning valves:
Fig.-No. M737: DN 50 to DN 300 M737
Fig.-No. 1700: DN 15 to DN 50 1700
Fig.-No. 1700L: DN 15 1700L
Fig.-No. 1710: DN 15 to DN 50 1710
Metering stations/combinations metering stations/valves:
Fig.-No. M2733: DN 50 to DN 300 M2733
Fig.-No. M2943G: DN 350 to DN 600 M2943G
Fig.-No. M2944G: DN 350 to DN 600 M2944G
Fig.-No. M2963G: DN 350 to DN 600 M2963G
Fig.-No. M2964G: DN 350 to DN 600 M2964G
Fig.-No. M2973G: DN 350 to DN 600 M2973G
Fig.-No. M2974G: DN 350 to DN 600 M2974G
Fig.-No. 2473LC: DN 15 2473LC
Fig.-No. 2473L: DN 15 2473L
Fig.-No. 2473MC: DN 15 2473MC
Fig.-No. 2473M: DN 15 2432M
Fig.-No. 2432C: DN 15 2432C
Fig.-No. 2432: DN 15 to DN 50 2432
Fig.-No. 5200: DN 15 to DN 50 5200
Fig.-No. M7733CSDR: DN 65 to DN 200 M7733CSDR

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Content of measuring case
11. Measuring case
12. Flow meter “OV-DMC 2” with shoulder strap
13. Measuring head with connection cable, connection nipple for measuring hose and two rubber rings
protecting the measuring head against impact
14. Power pack with connecting cable
15. Temperature sensor with connecting cable 1 m long
16. Measuring hose, red with quick couplings 0.5 m long
17. Measuring hose, blue with quick couplings 0.5 m long
18. Allen key 3 mm with black handle
19. Allen key 4 mm with black handle
10. Allen key 8 mm with black handle
11. PC connection cable to transmit stored data of the “OV-DMC 2” to the USB interface
12. USB-Stick for data transmission
13. 2 measuring adapters with connection thread R 3⁄4for quick-coupling technic
Suitable for “Hydrocontrol” as well and the fill and drain tool 106 17 91 of “Hycocon”
14. Measuring adapter with connection thread R 3⁄4for double regulating and commissioning valves
“Hydrocontrol” with needle technic
15. Set of measuring needles 106 91 99 for measuring technic “classic” of double regulating and
commissioning valves, e.g.“Hydrocontrol”
16. Operating key 106 01 85 for older double regulating and commissioning valves “Hydrocontrol”
17. Two connection nipples 106 91 86 for replacement at measuring head
18. Set of measuring needles 106 17 99 for measuring technic “eco” of double regulating and commissioning
valves, e.g.“Hycocon”
19. 2 fill and drain tools 106 17 91 for measuring technic “eco” of double regulating and commissioning
valves, e.g.“Hycocon”
20. Measuring device 114 50 99 for regulating valves “Cocon” with measuring technic “eco”
Operating instructions

8
12. Flow meter “OV-DMC 2” with shoulder strap
13. Measuring head with connection cable, connection nipples for measuring hoses and two rubber rings protecting
the measuring head against impact
14. Power pack with connecting cable
15. Temperature sensor with connecting cable 1.0 m long
11. PC connecting cable to transmit stored data of the “OV-DMC 2” to the USB interface

9
Component connection diagram/Battery case
Lockable plug
red
positioning
point
Sliding sleeve
Guide
Lockable plug-in connection between
flow meter and measuring head:
The plug is released by pushing back
the sliding sleeve!
The red positioning point indicates the
position of the guide when introducing
the plug into the guiding groove of the
jack bush on the lower side of the flow
meter.

10
Technical data
Measuring range: Measuring range - differential pressure: -0.05 kPa to 200 kPa
Max. static excess pressure: 2000 kPa
Measuring range – temperature: -20°C to +120°C
Resolution: Differential pressure: 0.01 kPa
Flow: 0.0001 l/s
Temperature: 0.1°C
Accuracy: Differential pressure: up to 10 kPa ± 0.1 kPa
10 to 200 kPa 1% of measured value
Flow: 0.01 l/s
Temperature ± 1°C
Ambient temperature: Working temperature: 0°C to 40°C
Storage: -20°C to +60°C
Attention: In case of risk of frost, no water may remain in the
measuring head!
In this case, the measuring head and the measuring hoses have to
be drained completely.
Humidity: Max. relative humidity of 90% non-condensing
Protection class: Body IP52
Keyboard IP54
Dimensions/weight: Flow meter: 160 x 63 x 40 mm, weight 470 g
Measuring head: 130 x 70 x 70 mm, weight 1240 g
Display: LCD display with backlighting
Power supply: 4 rechargeable NiMh batteries
or by using enclosed power pack 230 V AC 50/60 Hz
or by using 4 commercial Mignon batteries 1.5 V
Attention: In case of battery operation, the power pack must not be
connected!
Interface: USB

11
Keyboard
The flow meter is activated by using the key . The flow meter is switched on by
pressing the key for about 1 second and is switched off by pressing it for about 3 seconds
(only possible in the main menu). Before the flow meter switches off completely, some data
is saved and it is checked (with the measuring head being connected) whether the bypass
inside the measuring head is opened. If required, it is opened then.
Use the keys and to get from one point of the menu to the next.
Selecting key and within the menu.
Modification of flow meter setting, e.g. adjustment of the contrast of the display (see page 31).
Going back to the previous menu, e.g. from menu "Measure (start)” to menu "Valve-Setup”
after having completed measurement if you perhaps want to correct a wrong entry of the
valve size.
To enter the chosen submenu, press the key "OK”. Depending on the chosen menu, use the
keys or to get back to the overriding menu or "OK” (from menus which do not have
any submenus).
oventrop OV-DMC 2

12
Main menu
System-Setup
Options of main menu
General information:
If the flow meter is switched on with the measuring head being connected
(keep key pressed for about 1 sec.), not only “oventrop” but also the 4-
digit number of the flow meter appears in the lower left edge and the 2-digit
software version in the lower right edge. The main menu appears after a short
initialisation.
Apart from the main menu, the symbols “––” or “I” are indicated in the right and
left corner of the display.
The symbol “––” indicates that the bypass valve within the measuring head
is opened.
When the symbol “I” appears, the bypass valve is closed and should under
no circumstances be connected to a heating circuit! In this case, please
proceed like this: A measurement with the measuring head not being
connected to the heating circuit is to be carried out and to be concluded
properly (so that the bypass valve is opened). The measuring head should
only then be connected to the heating circuit!
---------------------
---------------------
SYST M-S TUP
M ASUR M NT-S TUP
VALV -S TUP
M ASUR (START)
T MP.M ASUR M NT
MAINM NU
---------------------
---------------------
nglish
sound: on
light: off
lighttime: 00 s
charge batteries
memory
SYST M-S TUP
System-Setup
nglish Choice of the language by using the keys and
. Confirm by pressing the key “OK”.
Sound The sound can be switched on or off by using the keys
and .
Light The lighting can be switched on or off by using the
keys and .
Light time The time of lighting is adjustable between 10 s and 60 s
by means of the keys and .
The lighting is reactivated by pressing any key.
Charging batteries
Charging of the batteries is activated by pressing the key “OK”.
Memory see menu “Store Measurement” (page 29).
Print content
View content
Clear memory
oventrop
xxxx x.x

13
Measurement-Setup/Valve-Setup
Valve-Setup
Oventrop ---------- Choice of the valve manufacturer by using the keys
and .
Type----------------- Change to valve type by using the key .
Choice of the valve type by using the keys
and .
Size------------------Change to valve size by using the key .
Choice of the valve sizes (dimensions) by using the
keys and .
---------------------
---------------------
OV NTROP
type: Hydrocon
size: 020
VALV -S TUP
Measurement-Setup
Measuring
method------------- Choice of the measuring methods by using the
keys and .
Balanced pressure method, kv-value method, computer
method, OV-Balance
Pressure----------- Choice of the unit for pressure indication by using the
keys and .
Flow----------------- Choice of the unit for flow rates by using the keys
and .
Water--------------- Choice of the medium (e.g. ethylene glycol) in the heating
circuit by using the keys and .
When using ethylene glycol, indicate the percentage
composition by pressing the key . The indicated value
can be modified by using the keys and .
Connect the temperature sensor to the flow meter. An
error message (see Temperature Measurement page 14)
appears if there is no sensor connected.
Change to temperature measurement by pressing the key
“OK”.
Confirm the measured temperature by using the key
“OK”. The main menu is called up at the same time.
Choice of the medium (e.g. ethylene glycol).
---------------------
---------------------
BALANC D PR SSUR
pressure: mbar
flow: l/h
Water
M ASUR M NT-S TUP
---------------------
---------------------
COMPUT R M THOD
pressure: mbar
flow: l/h
Water
M ASUR M NT-S TUP
---------------------
---------------------
KV VALU M THOD
pressure: mbar
flow: l/h
Water
M ASUR M NT-S TUP
---------------------
---------------------
BALANC D PR SSUR
M THOD
pressure: mbar
flow: l/h
thylen glycol 35%
M ASUR M NT-S TUP

14
Temperature measurement
Temperature measurement
Connect the temperature sensor to the flow meter.
Change to temperature measurement by using the key “OK”.
Go to main menu by pressing the keys “OK”, or after having
measured the temperature.
An error message will appear on the display if there is no sensor connected.
Change to main menu by pressing the key "OK”, connect temperature sensor
and repeat measurement.
---------------------
---------------------
Temp.: 022.2 °C
Temp.: 072.0 °F
TEMP.MEAS REMENT

15
Temperature input
Temperature input
As for the measuring methods (balanced pressure, computer, kv value and
balance method), the fluid temperature is not only measured but it can also be
entered directly during glycol measurement in the menu “Measurement Setup”.
To enable a new temperature data entry, the previously displayed temperature
must be confirmed by pressing the “OK” key.
Temperature input is terminated by pressing the key . The entered tempe-
rature is now available for all subsequent measurements until a new value is
entered.
---------------------
---------------------
BALANC D PR SSUR
pressure: mbar
flow: l/h
thylen glycol 35%
MASUR M NT-S TUP
---------------------
---------------------
Temp.: 20.0 °C
Temp.: 68.0 °F
TEMPERAT RE INP T
---------------------
---------------------
Please choose method
T MP.-M ASUR M NT
T MP. INPUT
TEMPERAT RE

16
Measurement
Balanced pressure method
---------------------
---------------------
Hydrocon R DN 020
presetting:
mbar
l/h
l/h
presetting new:
BALANC D PR SSUR
---------------------
---------------------
Hydrocon R DN 025
presetting:
mbar
l/h
>STOR <
CH CK M ASUR M NT
Measurement
Some measurements are started directly from the menu “Valve-Setup”
(“Cocon” valves and metering stations). The sequence of measurement is simi-
lar to the kv-value method and is also described under that point.
For all other regulating valves, the menu “Measurement-Setup”, offers different
measuring methods:
Balanced pressure method/Data logging Differential pressure measurement
Kv-value method Computer method OV-Balance
Balanced pressure method: The valve manufacturer as well as the valve
chosen in the submenu “Valve-Setup” is indicated. “Presetting” requires the
presetting of the valve to be measured. Input is completed by pressing the
key “OK”. Now the measuring head is activated by the flow meter and the
bypass is closed automatically. The closing procedure is indicated by the rota-
ting symbols in the left and the right display corners. The closing procedure
being completed (indicated by symbol “I”), it still takes a short moment before
the pressure measured as well as the resulting flow rate is indicated.
Now the desired flow rate has to be entered. After having entered this value,
which is confirmed by pressing the key “OK”, the flow meter calculates the
new presetting which it indicates as “presetting new”. Now the valve has to be
preset according to the new value. By pressing the key “OK” the menu
“Check Measurement” is reached. Here, the new presetting value, the resulting
differential pressure and the old and new flow rate (in comparison) are indica-
ted. After having completed control, the beginning of the menu can be reached
by pressing the key and a new measurement can be carried out.
Attention: Each measurement with subsequent change of valve type
has to be completed by pressing the key !

17
Data Logging: Here, several measurements are carried out at different
intervals and are stored in the memory of the flow meter as consecutive valve
numbers.
The data logging function is possible in the balanced pressure method and
when measuring differential pressure. The command “Store” is chosen in the
menu “Store Measurement” and the menu “Store Measurement” is reached by
pressing the key “OK”. Apart from “name”, “group” and “number”, the valve
type, valve size, presetting, differential pressure and the flow rate are stored.
This data can be printed via the serial interface.
“Store” is reached after having confirmed entry by using the key “OK”.
Now choose “Data Logging” by using the key and confirm by pressing the
key “OK”. The menu window of "Data Logging” is reached next.
Now the clock time in minutes and the number of measurements can be ente-
red. A maximum of 200 measurements is possible with the free storage locati-
ons being indicated in the display under "Measurements”. Input has to be
confirmed by using the key “OK”. Data logging starts with “Start” and is
confirmed by using the key “OK”.
After having processed all measurements, the programme “Data Logging” is
completed automatically.
To conserve the batteries, long term measurements may only be carried out
with the power pack being connected. Should no power supply be available, a
limited number of measurements may be carried out without the power pack.
During entry the following has to be observed:
- The product of clock time and measurements may not exceed 60 (e.g. 10
measurements every 6 minutes).
- The number of measurements may not exceed 20.
- The measurement cycle may not exceed 2 hours.
If the a.m. instructions are not followed, the error message “No powerpack”
appears.
Now a power pack has to be connected and the error message has to be
neutralised by pressing the key “OK”. The green control lamp of the flow meter
lights up during power pack operation.
Data Logging
---------------------
---------------------
name: DataLog1
group: 2
number: 1
> STOR <
> DATA LOGGING <
STORE MEAS REMENT
---------------------
---------------------
rate: 10 min
measurements: 200
next in: 10 min
> START <
DATA LOGGING
DATA LOGGING
!! rror !!
No Power pack!
> Yes <
---------------------
---------------------
Hydrocon R DN 020
presetting:
mbar
l/h
l/h
presetting new:
BALANC D PR SSUR
---------------------
---------------------
Hydrocon R DN 025
presetting:
mbar
l/h
>STOR <
CH CK M ASUR M NT

18
Kv-value method
Computer-method
Kv-value method: The kv-value of the valve to be measured is entered. Input
is completed by pressing the key “OK”. Now the measuring head is activated
by the flow meter and the bypass is closed automatically. The closing proce-
dure is indicated by the rotating symbols in the left and right display corners.
The closing procedure being completed (indicated by symbol “I”), it still takes
a short moment before the differential pressure measured as well as the resul-
ting flow rate is indicated. The menu “Store measurement” is reached by pres-
sing the key “OK”. Apart from “name”, “group” and “number”, differential pressure
and flow rate are stored. This data can be printed via the serial interface.
---------------------
---------------------
Hydrocon R DN 020
preset’g 1:
preset’g 2:
l/h
l/h
preset’g new:
COMPUT R-M THOD
---------------------
---------------------
Hydrocon R DN 025
presetting:
mbar
l/h
>STOR <
CH CK M SAUR M NT
---------------------
---------------------
Kv-val.:
mbar
l/h
>STOR <
KV-VALU M THOD
Attention: Each measurement with subsequent change of valve type
has to be completed by pressing the key !
Attention: Each measurement with subsequent change of valve type
has to be completed by pressing the key !
Computer method: The valve manufacturer as well as the valve chosen in the
submenu “Valve-Setup” is indicated. At the prompt “Preset’g 1” enter the
presetting of the valve to be measured. Input is completed by pressing the key
“OK”. Now the measuring head is activated by the flow meter and the bypass
is closed automatically. The closing procedure is indicated by the rotating sym-
bols in the left and right display corners. The closing procedure being comple-
ted (indicated by the symbol “I”), it still takes a short moment before the flow
rate measured is indicated.
Now the valve has to be preset to the new presetting which is entered at the
prompt “Preset’g 2”. By pressing the key “OK”, the second flow value is indi-
cated on the display. The desired flow rate has to be entered now. Input is
completed by pressing the key "OK”. The flow meter now calculates the new
value of presetting which is indicated as “Preset’g new”. Now the valve is pre-
set according to the new value. By pressing the key “OK”, the menu “Check
Measurement” is reached. Here, the new presetting value, the resulting diffe-
rential pressure and the old and new flow rate (in comparison) are indicated.
After having completed control, the beginning of the menu can be reached by
pressing the key and a new measurement can be carried out.
---------------------
---------------------
name:
group:
number:
>STOR <
STORE MEAS REMENT

19
“Cocon”/“Cocon 4” valves/Metering stations
Permanent measurement
---------------------
---------------------
COCONkv045 DN 015
mbar
l/h
>STOR <
AKTIV
---------------------
---------------------
name:
group:
number:
>STOR <
STORE MEAS REMENT
Permanent measurement of “Cocon”/“Cocon 4” valves and metering sta-
tions: Here, the “Cocon” valve or the metering station are chosen in the menu
“Valve-Setup”. Choice is confirmed by pressing the key “OK” and measurement
is started automatically. Now the measuring head is activated by the flow meter
and the bypass is closed automatically. This closing procedure is indicated by
the rotating symbols in the left and right display corners. The closing procedure
being completed (indicated by symbol “I”), it still takes a short moment before
the differential pressure measured as well as the resulting flow rate is indicated.
By pressing the key , the measuring procedure is completed and the menu
“Store measurement” is reached by pressing the key “OK”. Apart from “name”,
“group” and “number”, differential pressure and flow rate are stored. This data
can be printed via the serial interface.
Attention: Each measurement with subsequent change of valve type
has to be completed by pressing the key !
Permanent measurement of differential pressure:
Here, the subpoint “DIFF. PR S.” is chosen in the menu “Measurement-Setup”.
Choice is confirmed by pressing the key “OK” and measurement is started
automatically. Now the measuring head is activated by the flow meter and the
bypass is closed automatically. This closing procedure is indicated by the rota -
ting symbols in the left and right display corners. The closing procedure being
completed (indicated by the symbol “l”), it still takes a short moment before the
differential pressure measured and the resulting flow rate is indicated. By press-
ing the key , the measuring procedure is completed and the menu “Store
measurement” is reached by pressing the key “OK”. Apart from the “name”,
“group” and “number”, the differential pressure measured is stored. This data
can be printed via the serial interface. Here, several measurements are carried
out at different intervals and are stored in the memory of the flow meter as con-
secutive valve numbers (Data Logging function).
Attention: Each measurement with subsequent change of valve type
has to be completed by pressing the key !
---------------------
---------------------
DIFF.PR S.
Pressure: mbar
M ASUR M NT-S TUP
>STOR <
DIFF.PR S.
---------------------
---------------------
name:
group:
number:
>STOR <
>DATA LOGGING<
STORE MEAS REMENT
AKTIV
mbar

20
OV-Balance
1st regulating group
2nd regulating group
OV-Balance: This regulation method is an advancement of the compensation method.
The advantage of the OV-Balance is that the complete supply system may be balanced by only one person.
The time required for the hydronic balance is reduced considerably provided that the installation is
structured clearly and a consecutive numbering of all regulating valves is summarised in regulating groups.
Once the numbering has been determined, it must be kept to during measurements.
Nevertheless, individual valves may be added, deleted or moved subsequently within the group, provided they
were taken into consideration during the preceding numbering of all valves.
Example of an installation with numbering of the valves:
A supply system may be composed of several regulating groups.
ach group has to be regulated according to the following sequence of regulation shown on page 21. The
group being installed at the most remote location of the circulation pump has to be regulated first. To guaran-
tee a sufficient differential pressure in the last group, the group valves preceding should be set to smaller
presetting values.
After having calculated the presetting values by using the flow meter, the valves of the regulating group are to
be set. The presetting values are stored in the flow meter and can be visualised on the display by entering the
name of the group. To do this, the measured values of OV-Balance can be listed in a print-out.