Page 1
The Measure of Technology
Operation manual
Leakage Tester
Art. No. 22755 2016-07-17
Wöhler DC 430
Leakage Tester
Page 2
Contents
2
Contents
1 General Information .............................. 4
1.1 Operation Manual Information ....................... 4
1.2 Notes ............................................................. 4
1.3 Intended Use ................................................. 4
1.4 Components .................................................. 5
1.5 Transport ....................................................... 5
1.6 Information on disposal ................................. 5
1.7 Manufacturer ................................................. 5
2 Specifications ........................................ 6
2.1 Measured values ........................................... 6
2.2 Calculated Values ......................................... 8
2.3 Logger ........................................................... 9
2.4 Technical Data ............................................ 10
3 Component explanation ..................... 11
3.1 Basic unit ..................................................... 11
3.2 Probes and components ............................. 13
3.3 Function ...................................................... 18
3.4 Display and key setup ................................ . 19
4 Getting started .................................... 21
4.1 Check battery status.................................... 21
4.2 Tightness test .............................................. 23
5 Operation ............................................. 24
5.1 Turning the meter on ................................... 24
5.2 Measuring ................................................... 24
5.3 Using the Pressure computer ...................... 25
6 Measurement modes in the main menu
.............................................................. 27
6.1 Calling up the main menu ............................ 27
6.2 Option “Stress test” ..................................... 27
6.3 Option “Tightness test” ................................ 29
6.4 Option “Leakage rate” ................................. 34
6.5 Leakage rate, automatic ............................. 34
Page 3
Contents
3
6.5.1 Leakage rate (Decrease of pressure) .......... 39
6.6 Option “Regulator test” ................................ 44
6.7 Option “Determination of the Volume” ......... 45
6.7.1 Automatic determination of the volume ........ 45
6.7.2 Determination of the volume (hand-operated
method) ....................................................... 46
6.8 Option “Graph / record” ............................... 50
6.9 Option “Air speed” ........................................ 51
6.10 Option "U-value" .......................................... 53
6.11 Printing out measurement records ............... 54
6.12 Option "Save record" ................................... 55
6.13 Option "Setup" ............................................. 55
7 Option 'Data management' ................ 58
7.1.1 Save customer records ................................ 59
7.1.2 Recalling saved information ......................... 60
7.1.3 Setting up a new customer .......................... 60
7.2 Data transfer with the PC or notebook ......... 60
8 Troubleshooting ................................. 62
9 Maintenance ........................................ 62
9.1 Maintenance work ........................................ 62
10 Warranty and Service ......................... 63
10.1 Warranty ...................................................... 63
10.2 Service ......................................................... 63
11 Accessories......................................... 64
12 Declaration of conformity .................. 65
13 Sales and Service Points ................... 66
Page 4
General Information
4
1 General Information
1.1 Operation Manual In-
formation
This operation manual allows you to safely work
with the Wöhler DC 430. Please keep this manual
for your information.
The Wöhler DC 430 Leakage Tester should be
employed by professionals for its intended use
only.
Liability is void for any damages caused by not
following this manual.
1.2 Notes
WARNING!
Not following this warning can cause injury or
death.
ATTENTION!
Not following this note can cause permanent
damage to the device.
NOTE!
Useful information
1.3 Intended Use
The meter can be used to measure differential
pressure, flow speed, temperature and humidity.
(optional). It is especially designed for the following purposes:
Stress test and Leakage test according to the
German Gas Installations Directive (TRGI 2008 G 600)
Measurement of the leakage rate according to the
German Gas Installations Directive (TRGI 2008 G 600)
Flow pressure, installation pressure, standing
pressure, jet pressure
Flow measurement in air and flue gas ducts (from
ca. 2.0 m/s on)
Data logger/dew point-difference
Page 5
General Information
5
1.4 Components
Device
Components
Wöhler DC 430
Leakage Tester
Control report
Measuring hose, 1.7
m, with quick connector
1.5 Transport
ATTENTION!
Improper transport can harm the instrument.
To prevent damage to the instrument, always
transport it in the provided carrying case. The
pressure connectors have to be protected by the
protection cap.
The case is included in the sets and can also be
bought separately.
1.6 Information on disposal
Electronic equipment does not belong into domestic waste, but must be disposed in accordance
with the applicable statutory provisions.
You may hand in any defective batteries taken out
of the unit to our company as well as to recycling
places of public disposal systems or to selling
points of new batteries or storage batteries.
1.7 Manufacturer
Wöhler Technik GmbH
Schützenstr. 41
33181 Bad Wünnenberg
Tel.: +49 2953 73-100
Fax: +49 2953 73-250
E-Mail: [email protected]
Page 6
Specifications
6
2 Specifications
2.1 Measured values
Differential pressure
Description
Data
Range
± 2 bar
Accuracy
< 3 % of the reading
If the value is < ± 200
Pa, better than
± 6 Pa
Resolution
1 Pa at
–210 hPa up to
+210 hPa, otherwise
10 Pa
Leakage test according to the
DVGW directives (German Association of Gas and Water Engineers)
Description
Data
Range
0,0 l/h to 10,0 l/h, tested up to 8 l/h
Accuracy
< ± 0,2 l/h up to 4 l/h,
otherwise 5% of the
reading
Resolution
0.1 l/h
Internal temperature measurement
Description
Data
Range:
-20 °C to 60°C
Accuracy
< ± 1 °C
Resolution
0.1°C
Page 7
Specifications
7
External temperature measurement
(optional, e.g. with Measuring Pliers for Temperature Measurement
or Special Wall Temperature
Probe)
Description
Data
Range:
2 canals, -20.0 °C to
+800.0 °C
Accuracy
< ± 1 °C at 0°C to
67°C, otherwise 1.5 %
of the reading, according to the directive EN
50379-2
Resolution
0.1°C
Moisture measurement (optional)
Description
Data
Range
0 % to 100 % rh (relative humidity), non
condensing
Accuracy
< ± 2 % rh, (range: 0
up to 90 % rh), otherwise < 3 % rh
Resolution
0.1 % rh
Absolute pressure (optional)
Description
Data
Range
300 hPa to 1100 Pa
Accuracy
± 1.5 hPa
Resolution
0.1 hPa
Page 8
Specifications
8
2.2 Calculated Values
Variable
Calculation
Pressure units
hPa, Pa, mmH2O, PSI, inwc,
bar, mbar, conversion according to the general conversion rules
Temperature
unit
°C to °F, conversion according to the general conversion
rules
Flow speed
measured with a Prandtl-Stube probe, indicated in m/s,
2 to 150 m/s
Pipeline volume
Automatic determination of
the pipeline volume
0.0 to 1000.0 l.
Leakage rate
Automatic (class V)
0.0 l/h to 10.0 l/h (tested
according to the directive VP
952 of the German Association of Gas and Water Engineers (DVGW).
In l/h (according to the working sheet G624 of the DVGW
–TRGI) There is a data base
integrated in the meter,
where the data necessary for
the measurements of different gas types can be selected.
With external sampling (decrease of pressure method),
class D: 0.0 l/h to 300.0 l/h
(The decrease of pressure
method is not tested.)
Decrease of
pressure
Stress test and leakage test
according to the Technical
Rules for Gas Installations
(TRGI), working sheet G600
of the DVGW (German Association of Gas and Water
Engineers).
Page 9
Specifications
9
2.3 Logger
Description
Data
Number of data records
9999 data records,
each with pressure
and humidity readings
(optional) and three
temperature values (if
the external temperature sensors are connected) can be stored
in the internal
memory. The user can
set the log rate from 1
second to 24 hours.
USB data transfer and
Bluetooth (option)
Permanent online data, already during the
registration
User adjustable log
rate
The user can select a
sampling interval between 1 second and
24 hours.
NOTE!
Ensure that the device is connected to the power
supply or that the batteries are charged.
Page 10
Specifications
10
2.4 Technical Data
Description
Data
Current consumption
4 AA rechargeable
batteries or 4 AA disposable batteries 1.5
volt
- working mode:
ca. 60 mA,
- off-mode and log
mode:
ca. 45 µA for clock
and processor
Interfaces
USB- (COM-Port),
Bluetooth (optional)
- With the TD 600
thermal fast printer it is
possible to start the
printout of the readings directly from the
main menu.
Storage Temperature
-20 °C to +60 °C
Operating Temperature
5 °C to +40 °C
Mass
ca. 450 g, with integrated magnet
Dimensions
80 x 550 x 60 mm
Date and time
Date and time are
included in the measurement report
Internal memory
2 MB
Page 11
Component explanation
11
1
3
3 Component explanation
3.1 Basic unit
Fig. 1: Overview
2
4 5 6
7
8910
11
12
13
Page 12
Component explanation
12
Number
Function
1
Mini-USB-Port
2
Connection for protection cap
3
Power jack
4
Color display
5 ESC key
The function of the key changes according to the context.
Escape
NOTE!
Keeping this key depressed will always call up the main
menu.
6 Arrow keys
The function changes according to the context. Scroll
up and down.
7 ENTER
and On-/Off key
a) Confirm the setting.
b) The function changes according to the context.
c) Press and hold the key for 3 seconds to turn off the
unit.
8 Infrared interface
Thermal fast printer to print out the measurement report
9 Overpressure socket
(+)
Main socket for the leakage test
10 Underpressure socket (--)
Socket for the measurement of the differential pressure
and static socket for the S-tube probe
11 Connection for the gas
bladder
Connect the gas bladder, needed for the leakage test.
12, 13
Standard jacks for temperature probes NiCr-Ni
14
Battery cover (in Fig. 1 on the rear side)
There are diffusion openings for the internal registration
of the humidity and temperature on the rear side of the
Wöhler DC 430. The internal temperature measurement
is necessary for the temperature compensation of the
pressure sensor.
Page 13
Component explanation
13
3.2 Probes and components
Fig. 2: Hose assembly of the Wöhler DC
430 for the leakage test
Standard hose, 1.7 m, for leakage test. The overpressure socket (+) of the Wöhler DC 430 has to
be connected to the test opening of the gas installation.
A hose with an internal diameter of 5 - 6 mm or a
quick connector, type DN 2.7, can be connected to
the test opening.
ATTENTION!
Do not use silicone hoses when measuring high
pressure, because, from an overpressure of 1000
hPa on, perforations may appear in this material.
The Wöhler Leakage Test Set includes convenient
textile hoses (see Accessories).
Page 14
Component explanation
14
Fig. 3: DC 430 with hose assembly and
a filled gas bladder for the leakage test.
Gas bladder connection for measuring the leakage
rate with gas.
NOTE!
Please observe the valid accident prevention regulations!
Fig. 4: S-tube probe
S-tube probe for measuring the flow speed (see
chapter 6.3)
Insert the plug of the S-tube probe into jack 12
(Fig. 1) of the Wöhler DC 430.
Connect the overpressure hose (turned against
the flow) of the S-tube probe to the overpressure socket (+) (Fig. 1, part 9) and the underpressure hose to the underpressure socket (-)
(Fig. 1, part 10).
Page 15
Component explanation
15
Fig. 5: Connections
Connections for the hand-operated method for the
determination of the volume and the leakage rate
according to the falling-pressure method (without
internal pump).
Fig. 6: Wöhler Gas Line Sealing Set
Wöhler Gas Line Sealing Set:
1 X-connector
2 hose to be connected to the meter
3 hose to be connected to the pump
4 hoses to be connected to the gas pipe
Fig. 7: Connections when measuring the
differential pressure at a gas fat burner
Connections when measuring the differential pressure at a gas fan burner:
Note!
A measurement hose 3,5 mm Ø, 1,5 m length and
two T-pieces 4 mm Ø are necessary (art. 9237,
see accessories).
Cut the hose in two equal parts and cut a 10
cm piece of hose from each half.
Plug each of the two longer hoses on the mid-
dle part of the T-piece and plug the two shorter
parts of hose on the exterior end of the Tpiece.
2 3 4
1
Page 16
Component explanation
16
Fig. 8: Wöhler DC 430 connected to the
gas fan burner (for the measurement of
the differential pressure)
Remove the hoses of the burner and connect
the free parts of the two t-pieces.
After that connect the two 10 cm hoses to the
burner
Switch on the Wöhler DC 430 und read the
differential pressure in the measuring mode.
Fig. 9: Connection of two temperature
measuring pliers.
Two temperature measuring pliers can be connected at the same time.
Insert the plug of the temperature measuring
pliers into the jacks 12 and 13 (Fig. 1) of the
Wöhler DC 430.
The temperature value measured by the meter
connected to jack 12 will be indicated in the display
as T1 and the one measured by the meter connected to jack 13 will be shown as T2.
NOTE!
Any thermocouple type K may be connected to the
jacks 12 and 13.
Page 17
Component explanation
17
Fig. 10: Connection of the Special Wall
Temperature Probe for measuring the
heat transmission coefficient.
Connection of the Special Wall Temperature Probe
to measure the heat transmission coefficient. (See
chapter 6.10) Two Special Wall Temperature
Probes can be connected at the same time.
Insert the plug of the Temperature Probe into
the jacks 12 and 13 (Fig. 1) of the Wöhler DC
430.
Page 18
Component explanation
18
3.3 Function
Pump
Pressure tank
Valve
Overpressure socket (+) / connection to the
gas line
Gas bladder connection
Absolute-pressure
and humidity sensor
Fig. 11: Interior of the device
Page 19
Component explanation
19
Functions
The Wöhler DC 430 performs the leakage test
according to the directions (class V) of the DVGW
(German Association of Gas and Water Engineers).
This means that a defined volume will be added to
keep the working pressure constant. - The volume
added will be divided by the measuring time, and
the result will be the correspondent leakage rate.
During this process, the volume is injected in discontinuous steps. First a small pressure storage is
emptied and filled by two pumps afterwards. Then
the volume flow is injected to the gas installation via
an electric valve.
If a filled gas bladder is connected to the pump
entry, the test can be done with gas.
3.4 Display and key setup
Fig. 12 : Display and keys
The Wöhler DC 430 has a color 2.4' display.
The OLED-technology allows reading the display
from almost any angle of view.
Four keys are available below the display to operate the Wöhler DC 430.
Escape
Scroll/Zoom
On/Off
Page 20
Component explanation
20
Abb. 13: Display details
The display is divided into a status, a menu and a
readings segment.
The currently selected task is shown in the left
status segment.
- Date and time, client (if selected), system diagnosis status and battery level are shown in the
status segment on the right.
The readings segment displays the readings or
the menu items.
The menu segment is situated at the bottom of the
display. It consists of three soft keys.
Page 21
Getting started
21
4 Getting started
4.1 Check battery status
Fig. 14: Position of the batteries in the
Wöhler DC 430
When the device is switched on, the battery indication is displayed in the upper right hand corner
of the screen. A fully charged set of batteries is
shown as a solid green battery symbol. An empty
red symbol indicates discharged or empty batteries. If the batteries are almost empty, the backlight
will dim. The warning "charge batteries" will appear. In this case, finish the measuring process as
soon as possible.
WARNING!
Incorrect use of batteries can cause injury!
Never dispose the battery to fire or high temperatures. Danger of explosion!
Liquids can pore out of the batteries due to mistreatment. Never touch the liquid. If you got in
contact to the liquid remove it with water. If the
liquid got into your eyes, remove it with water and
see your doctor as soon as possible.
WARNING!
Risk of electrical shock!
Never touch the power supply with wet hands!
Protect the power supply against water and mois-
ture!
Do not unplug the recharger by pulling the cable!
Do not use the power supply when the voltage
requirements of the recharger and the supply do
not match!
The batteries can be recharged even while they are
located in the analyzer.
NOTE!
You can still go on measuring while battery charging is in progress.
Page 22
Getting started
22
ATTENTION!
- Ensure rechargeable batteries are equipped in
the DC 430 before charging. Never try to charge
disposable batteries.
Use 4 AA rechargeable batteries only.
- Only use the Wöhler charger.
How to charge the batteries:
Before you plug the recharger into the outlet,
connect it to the charging connection of the
DC 430 (Fig. 1, part 3)
Fig. 15: Open the battery compartment.
Standard AA rechargers can be used for external
charging when the batteries are not located in the
analyzer.
To remove the batteries from the DC 430
open the battery compartment cover by pressing the clip and pushing the battery compartment cover at the same time.
Recharging empty batteries can take up to 3
hours.
NOTE!
To ensure maximum capacity use batteries of
same age and condition only. Always replace a
full set of batteries when necessary.
Page 23
Getting started
23
4.2 Tightness test
Before the Wöhler DC 430 is used as a leakage
tester the tightness of the device, of the measuring hoses and of the connectors should be tested.
Please, proceed as follows:
Switch on the Wöhler DC 430.
Close a custom PET bottle of at least 1 liter
capacity with the sealing cone PA 1 (blue,
small) and connect it via a hose to the overpressure socket (+) of the Wöhler DC 430.
Select "Leakage rate" from the main menu
and test the Wöhler DC 430 with its valves
and hoses.
The measured leakage rate should not ex-
ceed 0.1 l.
Do not perform gas line measurements, if the
device has not passed the tightness test described above.
NOTE!
To avoid temperature changes, do not touch the
bottle during the test.
Fig. 16: Tightness test with a PET bottle
Page 24
Operation
24
5 Operation
5.1 Turning the meter on
Fig. 17: Key pad with on/off-key
Fig. 18: Zeroing
ATTENTION!
Before the meter is used, a visual check must ensure each and every time that all functions work
properly. Before performing a leakage test, a
tightness test, according to chapter 4.2 must be
done.
Press on/off-key (on the right) to turn on the
meter.
The meter will automatically start with a 10 second
self test and a zeroing.
ATTENTION!
Do not connect any hose while the meter is performing the self check and do not expose it to any
differential pressure, because the pressure sensor
will automatically be zeroed during the self test.
5.2 Measuring
Fig. 19: Measuring mode
After that the meter will automatically call up the
measuring mode.
Al readings (measured and computed values) will
be shown continuously in the readings segment.
The following functions can be selected from the
menu segment
"Menu" key opens the main menu
Zoom: Turns the zoom-mode on and off (hold-
ing the button pressed).
Menu item „PD=0“: Differential pressure: The
pressure sensor will be zeroed once more.
Page 25
Operation
25
5.3 Using the Pressure
computer
Fig. 20: Display and keys
Holding the left button depressed (ESCAPE)
will always stop the current menu and call up
the main menu.
Fig. 21: Zoom feature
In the measuring mode, press the up or down
key to enter the zoom-mode. In the zoom
mode three values are shown in the display.
Press the up or down key to scroll the readings.
Keep the up or down key depressed to zoom
in or out.
Escape
Scroll/Zoom
On/Off
Page 26
Operation
26
Fig. 22: DC 430 with supporting loop
The Wöhler DC 430 is equipped with integrat-
ed magnetic holders on the rear side.
The magnetic holders will fix the analyzer on
any magnetic material surface.
It is also possible to fix the Wöhler DC 430
with the supporting loop during the measurement.
While measuring, either
hold the Pressure Computer in one hand
or
place it with the magnetic holder to any ap-
propriate surface
or
fix it with the supporting loof.
Page 27
Measurement modes in the main menu
27
6 Measurement modes in the main menu
6.1 Calling up the main
menu
Press the left key "Menu" to select the main
menu. In the main menu you can select all measurement and setup modes. The following submenus can be selected:
Fig. 23: Main menu
6.2 Option “Stress test”
Fig. 24: Wöhler Leakage Test Set (Option, see Accessories)
New gas lines with operating pressures up to
1000 hPa (1 bar) have to be checked by a stress
test in accordance to the DVGW (German Association of Gas and Water Engineers) worksheet,
Technical Rules for Gas Installations (TRGI)
2008. The test pressure is relatively high compared to the operating pressure and therefore the
gas line has to be charged with pressure by an
external device. (hand-operated air pump or electrical compressor). The stress test has to be done
without gas-devices when all the valves are
closed.
NOTE!
For the stress test, a compressed air pump (optionally an electrical compressor), a cross piece
and connection hoses are needed. We recommend the Wöhler Leakeage Test Set.
Page 28
Measurement modes in the main menu
28
Fig. 25: Example for the connections
during the stress test.
1. Close the gas line and seal it with a suitable
test plug.
WARNING!
Please observe the valid accident prevention regulations!
2. Switch the Wöhler DC 430 on before connect-
ing the overpressure socket (+) with a hose to
the test plug.
3. Connect a compressed air pump with a sec-
ond hose and the cross piece.
4. Select the menu item "Stress test" from the
main menu.
Fig. 26: Settings according to the Technical Rules for Gas Installations (TRGI)
The default test pressure, the measuring time and
the stabilization time will be displayed.
The user can change the settings with the up and
down keys. When the test pressure is lower than
300 hPa, the pumps integrated in the DC 430 will
inflate the gas line automatically.
NOTE!
We recommend to do the measurement with the
default settings, because these conform to the
requirements of the valid Technical Rules for Gas
Installations (TRGI).
5. Press "Start" to begin the measurement
Page 29
Measurement modes in the main menu
29
Fig. 27: Stress test – Inflate
Fig. 28: Stress test - stabilization
In the display the request "Inflate up to 1000 hPa"
will appear.
6. Pump air into the tube until the display indi-
cates a pressure of at least 1000 hPa.
As soon as the default test pressure of 1000 hPa
is reached, the stabilization phase will start (10
minutes according to TRGI).
NOTE!
The stabilization phase will start, as soon as the
test pressure of 1.000 hPa is reached. It will end
automatically, when the test pressure is lower
than 90% of the default value, that is lower than
900 hPa. In this case, the measurement cannot
be done and the user will have to check the connections first.
After that, the measurement will start automatically (10 minutes). The current pressure will be indicated on screen.
Fig. 29: Result of the stress test
After the test time has expired, the readings and
an evaluation according to the TRGI will be shown
in the display.
The test result is OK, when the following conditions
are fulfilled.
1. The initial pressure is higher or equal to the
preset test pressure.
2. The test time has been observed.
3. The decrease in pressure during the measurement is lower than 100 hPa (Minimum
resolution according to TRGI)
After that the printout of the protocol can be started by selecting the correspondent item in the
main menu, see chapter 6.11.
6.3 Option “Tightness
test”
The tightness test according to DVGW - TRGI
2008 has to be done after the stress test or generally after every modification of the gas line.
Before doing the tightness test disconnect all gasdevices and close all valves.
Page 30
Measurement modes in the main menu
30
HINWEIS!
During the tightness test of the whole installation
no pressure regulator may be connected. (insert
plate if necessary).
Page 31
Measurement modes in the main menu
31
Fig. 30: DC 430 connected to the test
plug via a hose.
1. Close the gas line and seal it with a suitable
test plug.
2. Connect the DC 430 via a hose and an adapter to the test plug.
WARNING!
Please observe the valid accident prevention regulations!
Fig. 31. Setting according to the
Technical Rules for Gas Installations (TRGI)
The default test pressure, the measuring time and
the stabilization time will be displayed.
The user can change the settings with the up and
down keys. Press the "Info" key to select the test
time and the stabilization time according to the
TRGI G 600.
NOTE!
We recommend to do the measurement with the
default settings, because they conform to the requirements of the valid Technical Rules for Gas
Installations (TRGI).
Page 32
Measurement modes in the main menu
32
Fig. 32: Selection "Inflate manually".
The integrated pumps of the Wöhler DC 430 will
inflate the gas line automatically until a test pressure of 300 hPa is reached. If desired, the user
can also pump manually.
NOTE!
If the tightness test shall be done with the hand
operated method, the hoses and the pump have
to be connected with the Wöhler Leakage Test
Set (see accessories) as described in the chapter
corresponding to the "stress test".
Fig. 33: Request to inflate
1. Select "Start Measurement" and press "Start",
see Fig. 31.
2. Parameter “Pump automatically”. The Wöhler
DC 430 will inflate until the preset test pressure is reached and the stabilization time will
start. After that, the measurement will start automatically.
2. Parameter "Pump manually": The user pumps
with the air pump until the test pressure is
reached.
After that, the stabilization time will follow.
Fig. 34: Diagram of measured
values during the leakage test.
After the stabilization time has expired, the measurement will start.
The current pressure values are indicated in a
diagram. Below the diagram the remaining test
time is indicated.
After the test, the text "measurement finished" will
appear below the diagram.
3. Press right key "Continue".
Page 33
Measurement modes in the main menu
33
Fig. 35: Leakage test result:
After that, the readings and an evaluation according to the TRGI will be indicated in the display.
The test result is OK, when the following conditions are fulfilled.
1. The initial pressure is higher or equal to the
preset test pressure.
2. The test time has been observed.
3. The decrease in pressure during the measurement is lower than 10 hPa (Minimum resolution according to TRGI)
After that, the protocol can be printed by selecting
the correspondent item in the main menu, see
chapter 6.11.
Page 34
Measurement modes in the main menu
34
6.4 Option “Leakage rate”
6.5 Leakage rate,
automatic
The serviceability of gas lines which are already in
use can be checked by the leakage rate test (serviceability check).
ATTENTION!
Protect the gas bladder against direct sunlight,
because it could damage the material (natural
rubber).
Fig. 36: Filling the gas bladder
1. Connect the gas bladder via the test hose
included in delivery to the gas installation and
fill it as follows:
Connect the gas bladder via the connection
adapter to the gauge connection and fill it with
gas.
Unplug the gas bladder from the gas installa-
tion. The valve integrated in the snap-inconnector will close automatically.
WARNING!
The gas bladder can be filled up to an overpressure of 50 hPa (maximum).
Page 35
Measurement modes in the main menu
35
Fig. 37: Wöhler DC 430 connected to the
gauge connection via hose and adapter.
2. Close the gas line (cut off valve). Do not connect the test hose to the DC 430 yet.
NOTE!
The test hose is equipped with a snap-inconnector. The snap-in-connector is very helpful
when filling the gas bladder or connecting the
hose to the overpressure socket (+) of the Wöhler
DC 430.
3. Switch on the Wöhler DC 430 and wait until
the pressure sensor has been zeroed.
4. After that connect the overpressure socket (+)
via the snap-in-connector to the test hose.
Connect the gas bladder to the gas bladder
connection of the DC 430 (fig. 1, part 11).
NOTE!
If the installation is equipped with a diaphragm
control valve, observe the following: The inlet
pressure must be higher or equal to the outlet
pressure.
Fig. 38: Plan of the connections for the leakage rate test with the Wöhler DC 430 with gas bladder.
Page 36
Measurement modes in the main menu
36
Fig. 39: Upper part of the display
before the leakage rate test.
Fig. 40: Lower part of the display
before the leakage rate test.
5. Call up the main menu and select "Leakage
rate (autom.).
6. Press right key "Start".
The stabilization time, the test time, the gas type,
the air pressure, the operating pressure and the
pump pressure are indicated. The user can
change the settings with the up and down keys.
After pressing the "Info"-key, the user can select
the stabilization time and the test time according
to the DVGW, VG 925 prescriptions.
The following gas types can be selected for the
test: natural gas, hydrogen, butane, propane, city
gas and air.
The test can be done with the correspondent gas
using the gas bladder or with air after having
cleared the tube.
WARNING!
It is absolutely necessary to clear the tube with an
inert gas before doing the test with air.
If the DC 430 is equipped with an integrated absolute pressure sensor (optional), the air pressure
will be measured automatically. If there is no absolute pressure sensor integrated, the current air
pressure must be entered manually into the meter
(see chapter 6.13, Setup, parameter "air pressure").
Based on these settings the DC 430 will compute
the necessary pump pressure of the internal pressure tank, so that even the smallest leakages of
only 0.1 l/h can be detected.
NOTE!
If the gas line is filled with gas, the gas type "natural gas" has to be selected.
Page 37
Measurement modes in the main menu
37
Fig. 41: Information according to
DVWG VP 952
NOTE!
According to the Technical Rules for Gas Installations (TRGI) the test time and the stabilization
time depend on the tube volume. When ‘stabilization time’ and ‘test time’ are selected with the cursor, an info-button will appear in the lower left
corner of the display. (see chapter Fig. 39)
After the info key has been pressed, a table with
the stabilization times and the test times prescribed by the DVGW VP 952 will appear. These
prescriptions must be observed during the test.
In the info-display the user can select the volume
corresponding to the gas line to be tested. When
confirming the volume by OK, the selected volume
will be the base of the measurement.
7. Select "Start Measurement" and start the
measurement.
8. The Wöhler DC 430 will pump until the preset
test pressure is reached and the stabilization
time will start. After that, the leakage rate test
will start automatically.
Page 38
Measurement modes in the main menu
38
Fig. 42. Leakage rate during the
test
During the test, the current readings and the
remaining test time are indicated in the display.
NOTE!
The reading "V: x.xxx l" corresponds to the volume injected during the test time. (see fig. Fig.
42). PL indicates the current pressure of the gas
line and PK the pressure of the internal pressure
tank of the DC 430 during the injection.
Fig. 43: Leakage test result:
After the test time has expired, the readings and
an evaluation according to the TRGI will appear in
the display:
NOTE!
The indicated results observe the Technical Rules
for Gas Installations (TRGI):
Absolutely capable of being used: leakage rate <
1l/h
Capability of being used is reduced: Leakage rate
≥1 und < 4,9 l/h
Not capable of being used: Leakage rate ≥5 l
9. Confirm with "OK"
In the main menu a tick mark beside the menu
"leakage rate" will indicate that the test has already been done.
Page 39
Measurement modes in the main menu
39
6.5.1 Leakage rate (Decrease of pressure)
Theoretical background
According to the decrease-of-pressure-method
(hand-operated method) the leakage rate will be
calculated automatically according to the two following equations. Thus, this method observes the
rules of the Technical Rules for Gas Installations
(TRGI) worksheet G 624 of the DVGW.
f
p
p
VV
Start
B
LB
max
1
stoppakt
startakt
mess
Rohr
L
pp
pp
t
V
V
B
V
Leakage amount of gas in l/h under
operating conditions
L
V
Leakage amount of air under test pressure.
maxB
p
Maximum operating pressure of gas of
the installation
Start
p
Test pressure when starting the test
Stopp
p
Test pressure when finishing the test
akt
p
Absolute air pressure, select "Setup" >
"Air pressure" to enter the correspondent value manually (default 1013 hPa).
f
absolute viscosity of air/ absolute viscosity of the gas, is selected automatically after the gas type has been chosen
(see Fig. 39).
mess
t
Test time in hours (default 1 min)
Rohr
V
Volume of the test pipe section in l,
(select menu item "volume" to measure).
Page 40
Measurement modes in the main menu
40
Performing the test
NOTE!
If the user wants to pump manually, he needs an
air pump (or an electrical compressor), a cross
piece and connection hoses.
1. Close the gas line and seal it with a suitable
test plug.
WARNING!
Please observe the valid accident prevention regulations!
2. Determine the volume of the gas line, see
chapter .
3. In the main menu select "Leakage rate (decrease of pressure method).
Page 41
Measurement modes in the main menu
41
Fig. 44: Upper part of the display
before the leakage rate test (decrease of pressure).
Fig. 45: Lower part of the display before
the leakage rate test (decrease of pressure).
The volume of the gas installation, see chapter
6.7, the stabilization time, the test time, the gas
type, the air pressure, the test pressure, the operating pressure and the parameter “automatic” or
“pump with air pump” are indicated in the display.
Now the user can select if the DC 430 shall pump
automatically or if the user will pump with an air
pump.
The user can change all the settings with the up
and down keys. The following gas types can be
selected: gas, hydrogen, butane, propane, city
gas and air.
Fig. 46: When the parameters "stabilization time" or "test time" are selected, the
info-key will appear.
NOTE!
According to the Technical Rules for Gas Installations (TRGI) the test time and the stabilization
time depend on the tube volume. When you select
stabilization time and test time with the cursor, an
info-button will appear in the lower left corner of
the display.
Page 42
Measurement modes in the main menu
42
Fig. 47: Information according to DVWG
VP 952
After pressing the info-key, an information about
the stabilization time and the test time prescribed
by the working sheet VP 952 of the DVGW will
appear. These prescriptions must be observed
during the test.
In the info-display, the user can select the volume
that corresponds to the gas line to be tested. The
user has to confirm the volume by pressing OK
and the selected volume will be the base of the
measurement.
4. Select "Start Measurement" and press "Start"
(Fig. 11).
5. Parameter: "Inflate automatically". The Wöhler
DC 430 will pump until the preset test pressure is reached and the stabilization time will
start. After that, the measurement will start automatically.
5. Parameter "Inflate with air-pump": The user
has to pump until the preset test pressure is
reached.
Page 43
Measurement modes in the main menu
43
Fig. 48: Leakage rate during the test
(decrease-of-pressure-method)
During the test, the current readings and the remaining test time are indicated in the display.
Fig. 49: Leakage test result (decrease in
pressure)
After the test time has expired, the readings and
an evaluation according to the TRGI will be indicated in the display:
NOTE!
The results appearing in the display ( according to
the Technical Rules for Gas Installations (TRGI))
are as follows:
Absolutely capable of being used: leakage rate <
1l/h
Capability of being used is reduced: Leakage rate
≥1 and < 4,9 l/h
Not capable of being used: Leakage rate ≥5 l
6. Confirm with "OK"
In the main menu a tick mark beside the menu
item "leakage rate" will indicate that the test has
already been done.
Page 44
Measurement modes in the main menu
44
6.6 Option “Regulator
test”
Fig. 50: Display during the regulator
check after the static pressure has been
measured
Fig. 51: Display of the regulator check
after the flow pressure has been measured
In the menu "Regulator test" the functions of the
pressure regulator (SAV) can be checked.
NOTE!
If the installation is equipped with a diaphragm
control valve, observe the following: The inlet
pressure must be higher or equal to the outlet
pressure. OR separate the control valve from the
gas line and/or use an isolating plate.
NOTE!
- Impose pressure to the control valve.
inlet: 1,1 x pu max
outlet: 1,1 x pds max (no more than150 mbar)
The inlet pressure must be higher or equal to
the outlet pressure.
- Check tightness of the tube ends by applying
soap suds or with the Wöhler GS 220 Leakage tester (see accessories).
The static pressure should be constant. It has to
be measured when the gas installation is switched
off. If the static pressure increases or falls during
the check, the regulator is damaged.
The flow pressure has to be measured while the
fireplace is operating. The flow pressure value
should only be insignificantly lower than the static
pressure value. When the flow pressure declines
considerably, the regulator is damaged or too
small.
Press "Accept"-key to accept the static pres-
sure and the flow pressure.
The reseating pressure of a safety shut-off valve
is checked by increasing the pressure on the low
pressure side of the safety shut-off valve until the
valve closes.
Press "Start"-key.
The pressure in the tube will be increased by the
pumps integrated in the meter. The user can adjust the pump power with the up- and down-keys.
Press "Stop" as soon as a sound indicates the
closing of the valve.
This way, the reseating pressure is determined
Page 45
Measurement modes in the main menu
45
and stored by the Wöhler DC 430.
Press "Save" to finish the Regulator Check.
In the main menu a tick mark beside the menu
"Regulator check" will indicate that the regulator
check has already been done.
6.7 Option “Determination of the Volume”
6.7.1 Automatic determina-
tion of the volume
Fig. 52: Select volume
A tube volume up to 100 l can be determined automatically.
NOTE!
A tube volume between 100 l and 1000 l should
be measured with the hand-operated method (see
the following chapter).
1. Go to the main menu, select "Volume" and
confirm with OK.
Fig. 53: Determination of the volume
The meter will suggest a value for the test pressure and the air pressure.
NOTE!
The user can modify the test pressure value. A
test pressure of 5 hPa is recommended.
If the Wöhler DC 430 is not equipped with an absolute pressure sensor, the user must enter the
air pressure value, see chapter 6.13, parameter
"air pressure".
2. Press "Start".
The device pumps until the preset test pressure
value is reached.
Page 46
Measurement modes in the main menu
46
Fig. 54: Volume test result
After the test pressure has been reached, the Volume V
will be indicated.
When the value V keeps stable, press "OK" to accept it.
In the main menu a tick mark beside the menu "Volume"
indicates that the volume has already been determined.
6.7.2 Determination of the
volume (handoperated method)
It is recommended to determine a tube volume
between 100 l and 1000 l (maximum) with the
hand-operated method.
Measuring principle of the handoperated method for the determination of the volume
After a sample V
sample
has been drawn with the
Soot Test Pump, the pressure value in the tube
will change. Based on this pressure change, the
total volume V
tube
can be determined.
1
Pr
p
p
VV
akt
obeRohr
|
Temp. = const.
(3)
The Volume V
tube
is determined according to the
following equation in accordance with the principle
of the Boyle-Mariott's Law:
V
tube
Tube volume to be determined
V
sample
Volume that is drawn as a sample
p
Maximum pressure difference that results when the sample is drawn
p
act
Absoulte air pressure, has to be entered
in the setup menu by the user
(Default: 1013 hPa)
The DC 430 measures the pressure difference ∆p.
For an exact measuring result, the pressure difference ∆p should at least amount to 200 Pa, so
that an exact result can be reached. Therefore,
the sample V
sample
that the user draws with the
Soot Test Pump should amount to at least 1/500
of the tube volume.
NOTE!
Page 47
Measurement modes in the main menu
47
In case of a higher pressure, the stabilization time
during the temperature compensation will be
longer and the influence of leakages that might
exist is higher.
Page 48
Measurement modes in the main menu
48
Guidelines for the selection of the
sample volume that has to be
drawn with the soot test pump.
Pump volume
Max. tube volume
163 ml
(1 strike with the soot
test pump)
80 l
489 ml
(3 strikes with the soot
test pump)
240 l
Hand-operated method for the
determination of the volume
Fig. 55. Hand-operated method for the
determination of the volume with the
Wöhler DC 430 and the soot test pump
NOTE!
If the volume has to be determined with the handoperated method, a Soot Test Pump will be needed. The volume of the Soot Test Pump is 163 ml
per strike.
1. Close the gas line and seal it with a suitable
test plug.
WARNING!
Please observe the valid accident prevention regulations!
2. Switch the Wöhler DC 430 on before connecting the overpressure socket (+) via a hose to
the test plug.
3. Connect the soot test pump with a second
hose and the cross piece (see Fig. 55).
4. Go to the main menu, select "Volume" and
confirm with OK.
5. Enter the test volume into the meter according
to the sample volume that has to be drawn
with the soot test pump, e.g. 163 ml, that is
one strike with the soot test pump.
Page 49
Measurement modes in the main menu
49
Fig. 56: Presetting before the determination of the volume
NOTE!
If the Wöhler DC 430 is not equipped with an absolute pressure sensor, the user must enter the
air pressure value into the meter, see chapter
PARAMETER "air pressure".
6. Press "Start".
In the display the request to take the sample vol-
ume will appear.
7. Take the sample volume with the soot test
pump.
8. Start the measurement.
Fig. 57: Volume test result
The volume V is indicated in the display.
9. When the value V keeps stable, press "OK to
accept it.
In the main menu a tick mark beside the menu
"Volume" will indicate that the volume has already
been determined.
Page 50
Measurement modes in the main menu
50
6.8 Option “Graph /
record”
Fig. 58: Menu item Logging
The "graph / logging" mode is used to start a permanent data recording. A graph of the records will
be indicated.
The user can modify the log interval, the number
of measurements, the stop date and the stop time
as follows:
1. Go to the next digit by pressing the left-/right-
key and increase or reduce the value by
pressing the up- and down-keys.
The display can be switched off during the data
recording.
NOTE!
The display can only be switched off between the
measuring cycles, when a log interval of at least
20 seconds is selected.
2. Press "Start " to start data logging.
NOTE!
Ensure that the device is connected to the power
supply or that the batteries are charged.
A graph which presents the measured values
appears in the display.
After the key "Stop" has been pressed, the logged
data will be recorded.
Press "Print record" to print the graph of the selected measuring canal. Change the measuring
canal with the center keys.
When you press "Continue" the request "Accept
measuring values" will appear in the display.
Press "No" to return to the main menu without
saving the measured values. In this case there will
be no tick mark beside the menu "Graph / logging". Press "Yes" to return to the main menu
after saving the measured values. Beside the
menu "Graph / Logging" there will appear a tick
mark that indicates that the recorded data have
been saved.
After the logging process has stopped select the
'SAVE RECORD' option in the main menu screen
to save the logged data as a customer record.
Page 51
Measurement modes in the main menu
51
6.9 Option “Air speed”
Fig. 59: Connection of the S-tube probe
to the Wöhler DC 430
In this menu the flow speed (v) of the gas is
measured in m/s.
NOTE!
An S-tube probe (see accessories) is needed for
this measurement.
Fig. 60. Measurement of the flow speed
with the S-tube
1. Connect the total pressure connector of the Stube to the (+) overpressure socket of the
Wöhler DC 430.
2. Connect the static pressure connector of the
S-tube to the (-) underpressure socket of the
Wöhler DC 430.
3. Switch on the Wöhler DC 430.
4. When folded up, the S-tube can be inserted
through the measurement opening into the
gas flow.
5. Fix the S-tube with a cone, open it as shown
in Fig. 60 and direct the sensors as shown in
the figure.
6. If necessary, adapt the S-tube to the cross
section of the gas line with the help of the two
knurled screws.
NOTE!
This must be done before the measurement
starts. After loosening the knurled screws, adjust
the depth of immersion of the sensors and adjust
the oppositely running orientation of the measuring tubes.
Page 52
Measurement modes in the main menu
52
Fig. 61: Measurement of the flow speed
7. In the main menu, select "Flow speed" and
confirm with OK.
The flow speed v is indicated in the upper part of
the display. The temperature measured by the
sensor or the S-tube is indicated in the lower part
of the display. There are also indicated the differential pressure PD and the density ρ which are the
basis for the computation of the flow speed.
NOTE!
The wanted signal of the Wöhler S-tube probe is
better than that of a normal pitot tube, if the flow
speed is equal. In the setup-menu, the pitot factor
0.93 must be set once (see chapter 6.13).
Page 53
Measurement modes in the main menu
53
6.10 Option "U-value"
Fig. 62: Application example DC 430
with Special Wall Temperature Probe
Fig. 63: Display during the measurement
of the heat loss rate
The heat transfer coefficient refers to the heat flow
in W/m²k that flows through a building element.
NOTE!
A Special Wall Temperature Probe is needed to
measure the heat transfer coefficient (see accessories). All temperatures (also the interior air temperature tai and the outside air temperature tao
should be measured with the same sensor.
The temperature values measured by the Wöhler
DC 430 and the Special Wall Temperature Probe
are necessary for the determination of the heat
transfer coefficient. The heat transfer coefficient U
is determined with the following equation according
to the DIN standard 4108.
LaLI
WILIi
ist
tt
tt
U
U
current
U-value in W/(m²k), current value
tAI
interior air temperature
tWI
interior wall temperature
tAO
outside air temperature
i
fix value, 7,69 W/(m²k)
Page 54
Measurement modes in the main menu
54
6.11 Printing out measure-
ment records
Fig. 64: Transmission of data records
from the DC 430 to the thermal fast
printer TD 600.
In the main menu, select "PRINT" to start a data
printout of all measured values. First, a print preview will appear on screen. In the Setup-menu
different thermal printer types can be selected.
The menu options in the preview screen are:
Option "ESC" (left key): Click the left key to
exit and return to the main menu screen.
Option „↓↑“ (center keys): Click either up or
down key to scroll up or down in the preview.
Keep the key pressed to scroll various lines.
Option "Print" (right key): Click the right key to
start the print out.
When printing is in progress, a status bar will display the current process state and the Text “Printing protocol … Please wait.” will appear. Press
"ESC" to stop the printout.
Page 55
Measurement modes in the main menu
55
6.12 Option "Save record"
To save all records which are marked by a tick
mark in the main menu, select the "SAVE RECORD" option, see chapter 7.1.1.
6.13 Option "Setup"
Fig. 65: Option "SETUP"
Select the option "SETUP" to enter the main setup
menu. Navigate through the menu as follows:
1. Use the arrow keys to select and change the
parameters.
The parameter that can be changed appears in
red.
2. Press "ESC" to return to the main menu with-
out saving the modification or press "ON/OFF"
(right key) to confirm the modification.
Option "Time"
Change the current time of the internal clock (format 00:00)
Option "Date"
Change the current date of the internal calendar
(format 01.01.2010)
Option "AIR PRESSURE"
Enter the current air pressure p
curr
(in hPa) of the
place where the measurement has to take place
(QFE). This is important for the exact determination of the density and the leakage rate. Values
between 800 hPa and 1200 hPa can be entered
(default: 1013 hPa).
The air pressure can be determined as follows:
Consult the meteorological service, e.g. in Inter-
net, to find out the current air pressure.
This air pressure value refers to the sea level.
As the air pressure value indicated by the meteor-
ological service refers to the sea level, it is necessary to determine the altitude of the place where
the measurement has to take place.
For every 8 m of the altitude of the measurement
place, 1 hPa has to be deduced from the pressure
Page 56
Measurement modes in the main menu
56
referred to the sea level.
Example: Calculation of the absolute pres-
sure of the city of Paderborn.
The meteorological service indicates that the actual air pressure amounts to 991 hPa. Paderborn
is situated at 94 m above the sea level. The absolute air pressure in Paderborn is calculated as follows:
hPa
hPam
m
hPa 979
8
94
991
NOTE!
It is possible to arm the Wöhler DC 430 with an air
pressure sensor (see accessories). In this case it
will not be necessary to enter the air pressure into
the meter.
Pressure unit
Select the pressure unit hPa, Pa, mmH2O, PSI,
inwc, bar or mbar. The preselected unit is hPa.
Pressure measurement
Select "normal pressure measurement" (1 reading
per second) or "fast pressure measurement" (4
readings per second).
Temperature unit
Select the temperature unit °C or °F.
Brightness
Adjust the brightness of the display (range: 20 %
to 90 %).
Fast printing out
Select "on" to activate the fast printing mode. In
the fast printing mode the readings can be printed
out by the thermal fast printer Wöhler TD 600. If
you want to print with the thermal printer Wöhler
TD 23 select "off".
Customer selection
Select between "customer name" and "customer
number". Now the name or the number of the
customer can be selected in the customer menu.
Pitot factor
The pitot factor is important for the measurement
of the flow speed. It depends on the cross section
of the utilized s-tube. The pitot factor of the s-tube
probe is 0.93. Therefore the preselected value is
0.93.
Page 57
Measurement modes in the main menu
57
Alpha
Heat transmission coefficient for the u-value
measurement
Printer logo
Enter a custom corporate logo (6 lines) that will
appear in every printout.
Default
Reset the DC 430 to its factory default setting
(except the calibration).
Page 58
Option 'Data management'
58
7 Option 'Data management'
The Wöhler DC 430 offers different possibilities of
data management.
The device can save and manage the records of
64 customers.
There are two possibilities to select the customer
option:
Select option 'Customer' directly after having
switched on the DC 430, while the device is
performing the self check.
Select the 'Data management' option from the
main menu.
The first line of the customer screen will show the
memory size and the number of customer records.
The data management allows to:
Preselect a customer
Set up a new customer
Print saved information
Delete customer records
Delete all customer records
Receive customer records
Send customer records
Abb. 66:
Option ‘DATA MANAGEMENT’
Page 59
Option 'Data management'
59
7.1.1 Save customer records
A later version of the Wöhler DC 430 will include
the possibility to transfer Data to the PC.
If one gas installation has to be checked by a
stress test, a leakage test and a leakage rate test
with the same customer number, proceed as follows:
1. Select the 'Save' option from the main menu.
NOTE!
If no customer has been selected before, the customer screen will open automatically.
2. Use the up- and down keys to navigate
through the menu.
NOTE!
Keep the up or down key depressed to scroll faster.
3. Confirm with "OK".
NOTE!
The records marked with a tick mark in the main
menu are saved now.
After the records have been successfully saved, a
lock will appear instead of the tick mark.
Page 60
Option 'Data management'
60
7.1.2 Recalling saved information
Fig. 67: Recall saved information
If a customer is marked by a tick mark in the customer screen, there are already customer records.
These records can be shown at any moment.
To see the data records proceed as follows:
1. Select a customer
2. Select the 'PRINT' option from the main menu.
A print preview will appear in the display.
7.1.3 Setting up a new customer
Fig. 68: Set up a new customer
There are two possibilities to set up a new customer.
Import the customer records from the data
management program from your PC.
or
Enter the name, a customer number and the
installation number.
7.2 Data transfer with the
PC or notebook
The data can be transferred from the Wöhler DC
430 to the PC or Notebook via an USB data cable.
Proceed as follows:
Wöhler DC 430 mit dem im Lieferumfang
enthaltenen USB-Kabel an den PC anschlie-
ßen.
Unterpunkt „USB-Datenübertragung“ auswäh-
len: Main menu > data management > USB
data exchange.
Page 61
Option 'Data management'
61
Fig. 69: USB-Mode
Das Wöhler DC 430 befindet sich nun im USB
Modus.
Datenverwaltungsprogramm am PC öffnen.
Die weitere Steuerung der Datenübertragung
erfolgt vom PC aus.
Page 62
Troubleshooting
62
8 Troubleshooting
Error message
Possible reason
Solution
Batteries low
Disposable or rechargeable
batteries are empty.
Replace or recharge batteries.
Stabilization not possible. The loss of pressure is too
high.
During the measurement
the pressure is falling, so
that no measurement will be
possible.
Check connections.
ATTENTION! Overpressure
High pressure warning
when pumping manually.
Deflate pressure
9 Maintenance
Proper operation of the Wöhler DC 430 requires
regular maintenance.
9.1 Maintenance work
Interval
Maintenance work
If required (user)
Clean the device with a
wet cloth and a smooth
cleanser.
Change the Wadding
Filter when it seems
dirty. The Wadding
Filter is situated above
the gas bubble connection (fig. 1, part 11). It
can be changed with a
pair of tweezers.
Once a year (factory)
Send the device to one
of our service points for
checking and calibration.
Page 63
Warranty and Service
63
10 Warranty and Service
10.1 Warranty
Each Wöhler Leakage Tester DC 430 will be tested in all functions and will leave our factory only
after extensive quality control testing. The final
control will be recorded in detail in a test report
and delivered with any unit.
If used properly, the warranty period for the Wöhler Leakage Tester DC 430 will be twelve month
from the date of sale. Not covered by the warranty
are batteries and defects of the pressure sensor
caused by overpressure.
This warranty does not cover the freight and packing costs when the device is sent to the factory for
repair.
Service by non authorized personnel or making
modifications to the analyzer voids any warranty.
10.2 Service
Wöhler has built our reputation on excellence in
customer service. Therefore, of course, we are
readily available to assist you after the warranty
period ends.
Send us the device, and we will repair it and
return it to you with our package service.
Immediate help is provided by our technical
staff over the telephone.
Page 64
Accessories
64
11 Accessories
Probes and sensors
Special Wall Temperature Probe
Order no. 4651
Measuring pliers for temperature measurement
Order no. 6679
S-tube probe
Order no. 9244
Tightness
Leakage Test Set
Order no. 21580
High pressure cone G 1/2 with sealing rings
Order no. 7213
High pressure cone G 3/8 with sealing rings
Order no. 7214
Extras
Supporting loop with snap hook
Order no. 54348
Wöhler Thermal Fast Printer TD 600
Order no. 4130
Thermal Paper, 10 rolls
Order no. 4145
Measuring hose with brass quick connector DN 10
Order no. 9237
Wöhler Soot Test Pump
Order no. 2412
Spare parts
Wadding Filters
Order no. 9243
Option
Installation of an absolute pressure and humidity sensor
Order no. 9242
Page 65
Declaration of conformity
65
12 Declaration of conformity
The manufacturer:
Wöhler Technik GmbH
Schützenstr. 41, D-33181 Bad Wünnenberg
declares that the product
product name: Leakage Tester
model number Wöhler DC430
device class: V, according to the prescription G 5952 of the DVGW (German
Association of Gas and Water Engineers)
complies with the following requirements for conformity and electromagnetic compatibility.
- requirements for electromagnetic compatibility in accordance with EN 61326-1 1997+
A1: 1998+A2:2001
- requirements according to DIN EN 61010-1:2002
- the essential requirements for the protective system in accordance with EN
60529:1991
This declaration is submitted for the manufacturer by:
Dr. Stephan Ester, managing director Bad Wünnenberg, 18.04.2016
Page 66
Sales and Service Points
66
13 Sales and Service Points
Germany
Wöhler Technik GmbH
Schützenstr. 41
33181 Bad Wünnenberg
Tel.: +49 2953 73-100
Fax: +49 2953 73-96100
[email protected]
www.woehler.de
Wöhler West
Castroper Str. 105
44791 Bochum
Tel.: +49 234 516993-0
Fax: +49 234 516993-99
[email protected]
Wöhler Süd
Gneisenaustr.12
80992 München
Tel.: +49 89 1589223-0
Fax: +49 89 1589223-99
[email protected]
International
USA
Wohler USA Inc.
20 Locust Street, Suite 205
Danvers, MA 01923
Tel.: +1 978 750 9876
Fax.: +1 978 750 9799
www.wohlerusa.com
Italy
Wöhler Italia srl
Corso Libertà 9
39100 Bolzano
Tel.: +390471402422
Fax: +39 0471
www.woehler.it
Czech Republic
Wöhler Bohemia s.r.o.
Za Naspern 1993
393 01 Pelhrimov
Tel.: +420 5653 49019
Fax: +420 5653 23078
[email protected]
France
Wöhler France SARL
16 Chemin de Fondeyre
31200 Toulouse
Tel. : 05 61 52 40 39
Fax : 05 62 27 11 31
[email protected]
www.woehler.fr
Your contact:
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