Kobold DWD User manual

Operating Instructions
for
Paddle System Flow
Transmitter for Liquids
Model: DWD
O
Or rd de er r f fr ro om m: :
C
C A A
B
Br ri ig gg gs s
C
Co om mp pa an ny y
622 Mary Street; Suite 101; Warminster, PA 18974
Phone: [phone] - Fax: [phone]
Sa[email protected] - www.cabriggs.com

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page 2 DWD K04/0910
1. Contents
1. Contents........................................................................................................2
2. Note ..............................................................................................................3
3. Instrument Inspection....................................................................................3
4. Regulation Use..............................................................................................3
5. Operating Principle........................................................................................4
6. Mechanical Connection.................................................................................4
6.1 Mounting position.................................................................................4
6.2 Mounting position on electronic view ...................................................4
6.3 Flow direction.......................................................................................5
6.4 Mounting position.................................................................................5
6.5 Mounting in pipe ..................................................................................5
7. Electrical Connection ....................................................................................7
7.1 General ................................................................................................7
7.2 Power supply .......................................................................................7
7.3 Analogue output...................................................................................8
7.4 Voltage output (0-10 V)........................................................................8
7.5 Frequency output.................................................................................8
7.6 Connecting the relais ...........................................................................8
7.7 Interface...............................................................................................8
8. Commissioning..............................................................................................9
8.1 Programming the device ......................................................................9
8.2 Function BATT CHECK .......................................................................9
8.3 Adjusting the switching contacts ..........................................................9
8.4 Adjusting of the output .......................................................................10
8.5 Adjusting of standard indication mode ...............................................11
8.6 Adjusting of response time.................................................................11
8.7 The totaliser .......................................................................................11
8.8 Restriction of access by code number ...............................................12
8.9 Programming the interface.................................................................12
8.10 Mounting the ferrite............................................................................12
8.11 Protection on data loss ......................................................................13
9. Technical Information..................................................................................14
10. Order Codes ...............................................................................................15
11. Maintenance ...............................................................................................16
12. Dimensions .................................................................................................16
13. Declaration of Conformance .......................................................................20
Manufactured and sold by:
Kobold Messring GmbH
Nordring 22-24
D-65719 Hofheim
Tel.: [phone]
Fax: [phone]
E-Mail: [email protected]
Internet: www.kobold.com

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DWD K04/0910 page 3
2. Note
Please read these operating instructions before unpacking and putting the unit
into operation. Follow the instructions precisely as described herein.
The devices are only to be used, maintained and serviced by persons familiar
with these operating instructions and in accordance with local regulations
applying to Health & Safety and prevention of accidents.
When used in machines, the measuring unit should be used only when the
machines fulfil the EWG-machine guidelines.
PED 97/23/EG for DWD-1 and DWD-2
In acc. with Article 3 Paragraph (3), "Sound Engineering Practice", of the
PED 97/23/EC.
Diagram 8, Pipe, Group 1 dangerous fluids
3. Instrument Inspection
Instruments are inspected before shipping and sent out in perfect condition.
Should damage to a device be visible, we recommend a thorough inspection of
the delivery packaging. In case of damage, please inform your parcel service /
forwarding agent immediately, since they are responsible for damages during
transit.
Scope of delivery:
The standard delivery includes:
•Paddle System Flow Transmitter for Liquids model: DWD
•2 fold magnets
•Operating Instructions
4. Regulation Use
The Paddle System Flow Transmitter for Liquids, model DWD, is used for
monitoring and measuring of liquid flows. Only low viscous and homogenous
media may be measured, which do not affect the materials used in the
instrument. Dirt particles and fades could slog on the paddle and provide alarm
signal and measurement errors.

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5. Operating Principle
The flowing medium presses against a baffle plate that is fastened to a spring
loaded fulcrum. The paddle movement causes displacement of the fulcrum. The
position of a magnet attached to the fulcrum changes and is sensed by a Hall-
effect sensor inside the meter head, isolated from the liquid. This signal is
processed and evaluated by a microchip - based electronics with EEPROM
memory. The digital display indicates the actual flow or totalised value and the
analogue output changes its signal proportional to actual flow. Two adjustable
switching relays for flow set-point monitoring can be adjusted with front buttons.
An RS-232-C serial interface is available as an option.
6. Mechanical Connection
6.1 Mounting position
It is advantageous to install the unit in a straight piece of pipe and to choose a
place of mounting which has the biggest possible distance from elbows, valves
etc. It is especially important to have the biggest possible distance from magnet
valves and ball valves. Please make sure that they are opened as slow as
possible, especially if the pipe after the valve is empty. These measures prevent
the measuring system from flow shocks which can cause damages. We
recommend a straight length of 10 ×d at input side and 5 ×d at the output side
(d= diameter of pipe). The apparatus provides a stable signal when installed at
closer distances, but depending on flow conditions it may be less accurate
6.2 Mounting position on electronic view
Please take in consideration that the mounting has to be done EMI conform in
order to avoid interruptions of operations.
Especially the following points have to be attended:
-The provided ferrites have to be mounted as described.
-Signal and supply cable of the DWD may not directly taken close to 230 V or
380 V wirings.
-The device should not be installed close to inductance, switching loads,
engines or similar sources of inductive fields.

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6.3 Flow direction
It is essential that the unit is mounted so that flow is as indicated by the arrow on
the body. The unit will not operate unless installed correctly in this way and the
possibility of damage to the unit cannot be excluded.
6.4 Mounting position
Make sure that the supply wires are de-energized.
If the position of display or housing needs to be changed, it can be done on
site. In order to do this, the front and rear covers of the housing should be
removed. The PCB plate can be rotated, after loosening the screws of the PCB
cage. Rotate in 90° steps and re-fasten. Similarly the window of the electronic
front cover can be rotated. Shall the housing be turned, first the circuit board
must be taken out and the hexagon fastening nut must be unscrewed. After
detaching the housing it can be turned.
Please ensure that the PC board and the cable connection do not get
damaged.
6.5 Mounting in pipe
Units with THREADED CONNECTION
damaged while screwing in. In addition, no residue of sealing tape or other dirt
should remain in the pipe.
Units with FLANGED CONNECTION
Suitable flange sealing is to be used. This, as well as mounting screws, is not
included in delivery scope. Take care that the unit does not get damaged during
installation.
As sealing, PTFE tape is recommended. Take care that the unit does not get

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Units with WELD-ON SLEEVE
The weld-on sleeve is part of delivery scope. It must be removed from the unit by
loosening the union nut. The mentioned drawing dimensions (welding-insertion-
length) must be taken in consideration (27mm-S) (S = pipe wall thickness). A
bore free of burs must be drilled into the pipe. Subsequently the sleeve has to be
welded on and the unit has to be attached. Please ensure that the meter
movement does not get damaged during mounting. During welding of the sleeve,
the flow direction must be kept in mind (groove in the flowing against side).
Opposite of the groove is a paddle limiter, which should not be damaged or
removed during the mounting procedure.
Relay 1 Relay 2
DWD
PGM
OBOLD
117
Ca. 23
72.1
26
UM-SW 32

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7. Electrical Connection
7.1 General
Make sure that the supply wires are de-energized.
After removal of the back cover, the
terminal blocks can be accessed (see
the following drawing).
The terminal connectors of KL2 are for
connecting the relays, the terminal
connectors of KL1 are for connecting
power supply and output signals.
Prior to wiring the terminal blocks, all
the cables must be pulled through the
corresponding cable gland on the
instrument housing.
7.2 Power supply
The required supply voltage is 24 VDC±10%.
The power supply connection is at KL1.
Connect according to the previous drawing (see chapter 7.1 General): +24VDC (+)
and 0 VDC (-).
In order to prevent the electronic from impermissible potential between pipe and
device, the power supply device must be connected to a grounded power system.
If the leads are switched, the fuse must be changed.
Attention! A supplied ferrite with a coil must be mounted at the
connection cable for magnetic field protection.
+24V DC
0V DC
Frequency-0-10V/4-20mA
Frequency 0-10V/4-20mA
Fuse 2,5A

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7.3 Analogue output
The connection is at terminal strip KL1.
Connect according to drawing chapter 7.1 General:
−0-10V/4-20 mA
+0-10V/4-20 mA
The maximum load is 500 Ω.
A supplied ferrite with a coil must be mounted at the connection cable for
magnetic field protection.
7.4 Voltage output (0-10 V)
Connection is to block KL 1 according to the drawing. (See reference point
8.4). At the connection cable a ferrite must be fixed. The ferrite is included in
delivery.
7.5 Frequency output
Connection is to block KL 1 according to the drawing. (See reference point
8.4). At the connection cable a ferrite must be fixed. The ferrite is included in
delivery.
7.6 Connecting the relais
The switching contacts can be connected at KL2. For wiring diagram please refer
to the drawing. A supplied ferrite with a coil must be mounted at the connection
cable for magnetic field protection.
7.7 Interface
As special option, the DWD is also available with an interface RS232C. The
provided serial cable will be connected to the PC board via a plug. A supplied
ferrite with a coil must be mounted at the connection cable for magnetic field
protection.
Please note with this option the comments and chapter
8.9 Programming the interface.

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8. Commissioning
8.1 Programming the device
The device is equipped with 3 buttons on the front cover. The PGM button is to
select a menu point and to set the adjusted values. With the buttons ⇑and ⇓
values of each parameter can be adjusted. Button ⇑raises value. Button ⇓
decreases the value. Pressing this button one time changes the value by one
digit. If you keep the buttons on hold, the value changes continuously. After some
time, speed increases. At some points of the menu, the DWD informs you which
buttons have to be pressed as next step. For example PIN [+/-], whereby +
corresponds to button ⇑and – to button ⇓. The device returns back automatically
after some time to the run mode set under DWD MODE (see chapter 8.3
Adjusting of standard indication mode), if no button is pressed. In the first line, the
menu point is always shown and in the second line, the adjusted parameter value
is shown.
8.2 Function BATT CHECK
This function ensures that in case of power failure, dates of the totaliser are still
available. Therefore, this function should always be switched on in case of using
the totaliser (ON). For more information please see chapter 8.7 The totaliser.
If the totaliser is not used, it is recommended to switch off this function (OFF),
because in case of interruption of power, the DWD only works properly after
resetting the unit.
With button PGM, the menu is selected and with ⇑or ⇓, the function is to be set.
Pressing of PGM after adjusting the parameter sets the function.
8.3 Adjusting the switching contacts
Press button PGM until RELAIS 1 appears. Line 2 shows the actual switch point.
By pressing ⇑or ⇓, the value of the switch point can be adjusted. For setting the
switch point, PGM has to be pressed and “*” appears. After some time, the star
disappears. Adjusting the switch point is now completed. Pressing button PGM
once more results in RELAIS 2 appearing.
Adjustment is as described under RELAIS 1.
When the adjusted value is reached, a lamp is illuminating for control. The green
lamp (A) is assigned to RELAIS 1, the red lamp to RELAIS 2 (B).

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8.4 Adjusting of the output
The DWD is equipped with a current and a voltage output. The outputs can only
be used alternatively. Only one pair of connectors is available for both functions.
Connection is to clamp block KL1 (see chapter 7.2 Power supply and 7.3
Analogue output respectively drawing of the board). At menu OUTPUT, analogue
or voltage output can be activated. With the buttons ⇑and ⇓, the function will be
selected.
Button PGM sets the adjustment. At the option frequency output the max.
frequency can be adjusted between 125-32000 Hz. Therefore button P must be
pressed after entering the frequency function. Then the max. frequency can be
adjusted with the buttons ⇑and ⇓. Now the adjusted max. frequency corresponds
to the upper range value.
Allocation measuring value - output
Measuring value Output 4-20 mA Output 0-10 V
0 L/min 4 mA 0 V
ME 20 mA 10 V
Initial of the measuring range at 4-20 mA
The initial of the measuring range of the Paddle System Flow Transmitter for
Liquids DWD does not start at zero. At a measuring range of e.g. 10 – 100 L/min,
the output is 4 mA between 0 and 9,99 L/min. From 10 L/min the analogue output
increases linear from 5,6 mA to 20 mA at 100 L/min.
The analogue value at the initial of the measuring range calculates as follows:
MA = D/DEW x16+ 4
MA = mA value at the initial of the measuring range
D = flow (initial value)
DEW = flow (final value)
Initial of the measuring range at 0-10 V
The initial of the measuring range of the Paddle System Flow Transmitter for
Liquids DWD does not start at zero. At a measuring range of e.g. 10 – 100 L/min
the output is 0 mA between 0 and 9,99 L/min. From 10 L/min, the analogue
output increases linear from 1 V to 10 V at 100 L/min.
The analogue value at the initial of the measuring range calculates as follows:
VW = D/DEW x10
VW = volt value at the initial of the measuring range
D = flow (initial value)
DEW = flow (final value)