Dräger P7-TD User manual

5695075
Edition 02 – January 2019 (Edition 01 – June 2017)
en
Instruction Manual Dräger P7-TD
Dräger MSI GmbH
Rohrstraße 32
58093 Hagen
Tel.: [phone]
Fax: [phone]
email: [email protected]

Instruction Manual Dräger P7-TD
1

Contents
1. Tips..................................................................................................................................3
1.1 Approvals....................................................................................................................3
1.2 Tips for use .................................................................................................................3
1.3 Tips regarding servicing..............................................................................................3
1.4 Tip on disposal according to WEEE............................................................................3
1.5 Instruction manual and measurement data management software ............................3
2. The measuring device......................................................................................................4
3. Operation .........................................................................................................................5
3.1 Function keys..............................................................................................................5
3.1.1 Switching on / off...................................................................................................5
3.1.2 Functions of the function keys...............................................................................5
3.2 Info window and help functions...................................................................................6
3.3 Results display............................................................................................................7
3.4 Documentation menu..................................................................................................7
4. Selection of the functions.................................................................................................7 
5. Selecting and entering customer data .............................................................................8
6. Checklists / Visual inspection...........................................................................................9
7. Pressure measurements..................................................................................................9
7.1 Selection of pressure measurements..........................................................................9
7.2 Conducting pressure measurements ........................................................................10
7.3 Medium pressure measurement with pump function.................................................10
8. Manual tightness test.....................................................................................................11
9. Testing gas pipelines .....................................................................................................11
9.1 General information ..................................................................................................11
9.2 Selection of the gas pipeline test ..............................................................................11
9.3 Assessment of serviceability according to TRGI G 600 and G 5952 ........................12
9.3.1 General information regarding leak rate measurement using the MSI P7-TD.....12
9.3.2 Preparing the leak rate measurement.................................................................13
9.3.3 Stabilization ........................................................................................................14
9.3.4 Leak rate measurement ......................................................................................14
9.4 Tightness tests according to DVGW TRGI 2018 process sheet G 600.....................15
9.4.1 Automatic tightness test......................................................................................15
9.4.2 Tightness test with external pump acc. to DVGW TRGI process sheet G 600 ...16
9.5 Stress test acc. to DVGW TRGI process sheet G 600..............................................17
9.5.1 Regulations for low pressure systems ................................................................17
9.5.2 Regulations for medium pressure systems .........................................................17
9.5.3 Starting a stress test ...........................................................................................17
10. Testing drinking water installations ..............................................................................18
10.1 Testing of drinking water installations using air.......................................................18
10.1.1 Fully automatic tightness test............................................................................18
10.1.2 Tightness test with external pump.....................................................................19
10.1.3 Stress test up to DN 50 0.3 MPa (3 bar) and up to DN 100 0.1 MPa (1 bar) ....19
10.2 Tightness tests for drinking water installations using water ....................................20
10.2.1 Crimp connections (unpressed untight) ............................................................20
10.2.2 Metal, multi-layer composite and PVC pipes ....................................................21
10.2.3 PP, PE, PE-X and PB pipes and therefore, combined installations ..................21
12. Conducting pipeline tests.............................................................................................23

Instruction Manual Dräger P7-TD
 2

12.1 Tightness and stress tests ......................................................................................23
12.2 Termination or cancellation of pipeline tests ...........................................................24
13. Data storage ................................................................................................................24
13.1 Storing measurements............................................................................................24
13.2 Data management functions ...................................................................................25
13.3 Memory info ............................................................................................................25
13.4 Show data and delete individual dataset.................................................................25
13.5 Deleting measurement data....................................................................................26
13.6 Deleting customer data ...........................................................................................26
13.7 Inspector table ........................................................................................................26
14. Information function .....................................................................................................26
15. Configuration ...............................................................................................................27
15.1 Set clock .................................................................................................................27
15.2 Activate automatic start for leak rate measurement................................................27
15.3 Selection of the damping value for the pressure sensor .........................................28
15.4 Adjust backlight.......................................................................................................28
15.5 Switch key tone on / off...........................................................................................28
15.6 Automatic switch off (standby) ................................................................................28
15.7 Printer .....................................................................................................................29
15.8 Calibrating the touchpad .........................................................................................29
15.9 Wiping effect in Info window ...................................................................................29
15.10 Deleting an individual measurement .....................................................................30
15.11 Language..............................................................................................................30
15.12 Switching pressure units .......................................................................................30
16. Function assistance, warnings and error messages ....................................................31
16.1 Function assistance - symbols................................................................................31
16.2 Warnings and error messages................................................................................32
17. High performance rechargeable battery.......................................................................33
17.1 General information regarding the power supply ....................................................33
17.2 Charging the battery ...............................................................................................33
18. Technical specifications ...............................................................................................34
18.1 General technical specifications .............................................................................34
18.2 Technical specifications pressure measurements ..................................................34
18.3 Technical specifications pipeline tests ....................................................................35
19. Maintenance and care .................................................................................................35
20. Consumables and accessories ....................................................................................35

Instruction Manual Dräger P7-TD
3 

1. Tips
1.1 Approvals
The pressure and leak rate measuring device Dräger P7-TD is tested and approved by the
“Deutscher Verein des Gas- und Wasserfaches” (DVGW - German Association for Gas
and Water) and approved under the registration number DG-4805BS0029.
1.2 Tips for use
The Dräger P7-TD is suitable for measuring leak rates in gas installations and measuring
pressure values.
Any use of this measuring device requires the full understanding of and compliance with
this instruction manual, the relevant standards and DVGW process sheets as well as the
applicable statutory regulations.
The device is only intended for the applications described in this manual.
The flawless condition of the measuring device and the accessories used must be
checked prior to every measurement.
The displays shown in this manual are examples!
1.3 Tips regarding servicing
To ensure proper functioning and accurate measurements, the device must be inspected
and recalibrated once a year by a service center authorized by the Dräger MSI GmbH.
1.4 Tip on disposal according to WEEE
EC regulations pertaining to the disposal of electrical and electronic equipment have
been effective since 2005. In essence, these regulations govern the establishment of
collection and recycling facilities for private users. Given that the MSI P7-TD is not
registered for use in private households, it is also not permitted to be disposed of using
these channels.
The devices can be returned to your national retailer or to your national Dräger Safety Or-
ganization for disposal. Please contact the Dräger MSI GmbH if you have any questions
regarding disposal.
1.5 Instruction manual and measurement data management software
The instruction manual can be found on our website www.draeger-msi.de/en in the menu item
Services >Downloads>P7 >Operating Instructions.
You can find the measurement data management software PC200P, which you can download after a brief
registration using your device number and your address data, in the menu item Services >Downloads >P7>
Software.

Instruction Manual Dräger P7-TD
 4

2. The measuring device
The P7-TD is an electronic multi-channel measuring device. It enables various inspections
of pipelines and containers filled with gases, air or water.
All inspections and measurements can be documented by means of printouts or storage.
Illuminated color display with
touch screen
Function keys “F, ▲, ▼, H”
1 = pressure inlet (+) for mbar sensor 1 2 3 4 5 6 7 8
2 = pressure inlet (-) for mbar sensor
3 = connections for digital sensors
4 = gas inlet / gas outlet during pumping
5 = LED and infrared transmitter
6 = pressure inlet 0.1 MPa (1 bar sensor)
(Pneumatic quick coupling NW 5)
7 = USB - port
8 = socket for charger

Instruction Manual Dräger P7-TD
5

3. Operation
3.1 Function keys
3.1.1 Switching on / off
Switching on: simultaneous pressing of keys “F” and “H” for approx. 1 second. If sched-
uled servicing is pending, the device issues a reminder one month prior to the date sched-
uled for servicing.
After pressing “F” (CONTINUE) or directly after switching on, the display reads:
batterysymbols
The battery symbols show the charge level of the battery; in this case, full capacity. The
bar indicates the progress of the inspection and stabilization phase. Furthermore, the soft-
ware version of the device, a selected tester, date and time are shown.
The system check takes 5 seconds.
If errors are detected, warning messages are shown; otherwise the “selection of functions”
menu is opened.
Switching off: press “F” key for a longer period (> 3 sec.) or using the “switch off” function
in the “selection of functions” menu.
3.1.2 Functions of the function keys
The assignment of the functions keys is shown in the last line on the display re-
spectively.
The P7-TD has a touch screen. Touching the display in the relevant spot replaces the
command executed with the key. You can scroll the displayed content by dragging your
finger in a specific direction on the screen. When entering numeric values (e.g. test pres-
sure), the numeric value can be changed by dragging across the screen diagonally.
If the middle screen key is occupied by two functions, e.g. (▲▼), one of the functions is
located on the right side of the key displayed and the other function on the left side.

Instruction Manual Dräger P7-TD
 6

A context menu is opened with (lll).
Depending on the menu item, the context menu offers vari-
ous editing options and commands.
A previously selected customer number is shown in the result display with (REF). The cus-
tomer number can be changed before storing.
Customer data and comments can be entered using an on-screen keyboard.
Touching the display with sharp or pointy objects can lead to the destruction of the
display.
3.2 Info window and help functions
Pressing the right key for a longer period of time will open an
info window. The info window provides information regarding
the selected customer number, customer name, Inspector,
clock, battery state and remaining life of the battery in the
current operating state.
If the info window is open, a help function can be called up
with (HELP), which provides information on and assistance
with the respectively selected menu item.

Instruction Manual Dräger P7-TD
7 

3.3 Results display
A result display appears after completing a measurement.
You can scroll through the result display using (▲▼) .
A reference dataset is shown using (REF) . It consists of a cus-
tomer dataset selected prior to the measurement and the se-
lected tester.
3.4 Documentation menu
The following functions can be selected:
Back = switches to the result display
New measurement = start a new measurement
End, release = end of the measurement, the measurements are released
Print = start printing out the recorded values (IR printer)
Store = selection of the data storage
4. Selection of the functions
The following functions can be selected:
Switch off = switch off the measuring device
Customer administration = selection and entering of customer data
Checklists/Visual examination = processing of checklists / documentation of visual
examination
Pressure measurements = selection of pressure measurement
Tightness manual = freely configurable tightness test
Gas Pipe Checks = selection of the gas pipeline test (stress, tightness and
serviceability test)
Water Pipe Checks = selection of the drinking water installation test
Data management = selection of the data storage functions
Info = information function
Configuration = device configuration

Instruction Manual Dräger P7-TD
 8

5. Selecting and entering customer data
Using the PC software, there is the option of creating a cus-
tomer number, customer name and customer data and
transmitting this information to the measuring device.
If customer data is stored in the device, this function can be
used to select a customer and store data measurements un-
der this customer’s name.
If there is no customer data stored for the customer, it can be
entered using this function.
The context menu is opened with (lll).
No customer is selected using (Without).
New customer data can be created using (New).
The highlighted customer number and, if available,
corresponding data are shown using (Edit).
This data can be edited using (SELECT) and accepted using
(END).
The following can be stored: Customer number, name, system type, installation location,
system number, street, post code, city, customer name, customer’s street, customer’s post
code, customer’s city, customer’s phone number.
A customer name can be searched for in the data stored using (Search).
The customer number shown can be accepted using (SELECT).
The accepted customer number applies to all subsequent measurements until the device
is switched off or another number is selected.
The entire customer dataset can be deleted using (Delete). Individual customer datasets
can only be deleted if this function is activated and there are no measurements stored on
the device.

Instruction Manual Dräger P7-TD
9

6. Checklists / Visual inspection
A comment can be added to the results of the visual inspec-
tion and be documented.
Checklists can be configured using the professional software PC200P. Up to 4 different
checklists each with up to 20 items can be stored, edited and documented on the device.
7. Pressure measurements
7.1 Selection of pressure measurements
The following functions can be selected:
High Pressure = pressure measurements up
to 1500 hPa (mbar)
Medium Pressure = pressure measurements up
to 150 hPa (mbar)
Micro Pressure = pressure measurements up to 100 Pascal
Pump (150 hPa (mbar)) = medium pressure measurement with pump function
High pressure ext. (MPa) = high pressure measurement with external sensor
up to 2.5 MPa (25 bar)
Differential pressure measurements with the integrated pressure sensor (150 hPa (mbar))
are conducted in the “medium pressure” function.

Instruction Manual Dräger P7-TD
 10

7.2 Conducting pressure measurements
Connect the test nipple on the pressure tank or pressure line
to be measured to the corresponding pressure inlet of the
measuring device using a pressure hose. For high pressure
measurements, connect the pressure tank or line to be
measured to the external high pressure sensor using an
adapter.
The left side of the display shows the current measurement
with its measurement unit, the right side shows a diagram
with the current pressure curve.
The following functions can be selected:
Zero = the measured value shown is set to zero
(not ext. sensor)
Damp = selection of the damping value (not ext. sensor)
START = start the pressure measurement
ESC = ends the pressure measurement
After the pressure measurement is started, the current pres-
sure, the starting pressure, the difference to the starting
pressure, the mean value of the measurement and the dura-
tion of the current measurement are shown.
After completion of the measurement, the result display and
documentation menu open.
7.3 Medium pressure measurement with pump function
Prior to the medium pressure measurement, a pressure of up
to 150 hPa (mbar) can be built up using the installed pump.
Then, a medium pressure measurement can be made.

Instruction Manual Dräger P7-TD
11

8. Manual tightness test
Test pressure, Stable time and measurement period can be
set during the manual tightness test.
Select measuring channel: 150, 1,000 or 25,000 hPa (mbar).
Select test pressure: 10 - 150 hPa (mbar), 100 - 1,000 hPa
(mbar) or 1,000 - 25,000 hPa (mbar).
If a tightness test was selected in the 150 hPa (mbar) meas-
uring channel, the internal or an external pump can be used,
to build up the test pressure. Tests with the 25,000 hPa
(mbar) channel can only be conducted using an external pump.
Select stabilization time: 1 min - 12 h.
Select measurement time: 1 min - 12 h.
9. Testing gas pipelines
9.1 General information
The following tests must be conducted for the installation and maintenance of gas pipe-
lines according to DVGW process sheet G600. Stress test, tightness test and serviceability
test.
In the case of new installed pipeline systems, the stress and tightness test must be con-
ducted before the pipelines are plastered or covered.
Gas can only be let into new pipeline systems or into existing pipeline systems on which
work is to be conducted if the compulsory tests have been conducted successfully.
9.2 Selection of the gas pipeline test
The following functions can be selected:
Leak Measurement = selection of the leak rate measurement
Tightness Test = selection of the automatic tightness test
Tightness extern Pump = Selection of the tightness test with external pump
Stress Test 0.1 MPa (1 bar) = selection of a stress test at 0.1 MPa (1 bar)
Stress Test 0.3 MPa (3 bar) = selection of a stress test at 0.3 MPa (3 bar)

Instruction Manual Dräger P7-TD
 12

9.3 Assessment of serviceability according to TRGI G 600 and G 5952
Operating gas pipeline systems must be treated according to the degree of usability. The
basis for the assessment of usability is the measurement of the existing leak rate in liters
per hour (leak rate measurement). Serviceability is divided into the following criteria:
Unrestricted = gas leak rate < 1 l/h
Reduced serviceability = gas leak rate 1 l/h to < 5 l/h
No serviceability = gas leak rate > 5 l/h
If there is no serviceability, the system must be shut down immediately; if there is reduced
serviceability, the system must be repaired within 4 weeks.
9.3.1 General information regarding leak rate measurement using the MSI P7-TD
The MSI P7-TD enables determining the serviceability of gas pipelines according to TRGI
G 600 and test basis G 5952 at operating pressure. This method (comparison leak meth-
od) is patented. The measuring device is approved by the DVGW for the serviceability test
under the registrations number DG-4805BS0029.
If all the consumers associated with the gas pipeline to be measured are closed by means
of valves, the user only needs to connect the gas pipeline to be tested to the measuring
device using a pressure measurement hose.
After the stabilization period for temperature equalization, the user is instructed to close
the gas supply (e.g. main shut-off valve directly behind the gas meter). Then, the pressure
in the gas pipeline is measured and after a time calculated by the measuring device, a
comparison leak is opened.
The leak rate and the volume of the tested gas pipeline are calculated and shown from the
measured pressure changes, with and without comparison leak.
The applied comparison leak method works independent of volume, temperature and
absolute pressure.
A possible effect on the measurement accuracy through pressure regulators, which remain
in the measuring section after closing the valve, can be prevented by selecting “leak
measurement with regulator”. For this, the pipeline pressure is automatically reduced un-
der the nominal operating pressure set after closing the gas supply and measurement has
started, so that the pressure regulator fully opens and no gas can continue to flow during
the measurement. This does not affect the result of leak rate measurement.
!Observe the general requirements for handling combustible gases!

Instruction Manual Dräger P7-TD
13 

9.3.2 Preparing the leak rate measurement
Select standard leak measurement or leak measurement with
regulator in line.
The quick test and the measurement for expanded volume
are not DVGW (German competence network for all ques-
tions related to gas and water supply) tested and cannot be
stored. Depending on the stability in the gas pipeline, a quick
test can be conducted in approx. 7 minutes.
Select type of gas.
The actual operating pressure must be set as the nominal
operating pressure for operating pressures > 30 hPa (mbar);
otherwise the operating pressure must be set to 23.00 hPa
(mbar).
Accept operating pressure and establish connection to the
system.
The current pressure is shown.
Start measurement.
Now, purging is conducted for the connecting line and the
measurement system for 40 seconds, to prevent falsifications
of the measurement result. The gas is released from the gas
connection between the pressure inlets for the mbar and bar
sensors. At the same time, the flow rate is < 5 l/h. The stabili-
zation phase automatically begins after purging.

Instruction Manual Dräger P7-TD
 14

9.3.3 Stabilization
The stabilization of the gas pressure takes approx. 2 to 10
min. The current pressure in the gas pipeline to be tested, the
already elapsed time of the stabilization period and the pres-
sure drop up to this point (negative values mean that the
pressure in the gas pipeline has increased, e.g. due to tem-
perature influence) are shown. If stabilization has been
reached or if 10 minutes have passed, the stabilization phase
is automatically terminated and indicated acoustically.
The measuring system gives the instruction to close the gas
supply for the gas pipeline to be tested (e.g. main valve di-
rectly behind the gas meter) and provides information about
the current pressure in the gas pipeline to be tested and the
pressure drop up to this point. If the gas supply is closed and
the gas pipeline to be tested has a leak, the measuring de-
vice will detect a pressure drop. If the pressure drop is great-
er than 0.4 hPa (mbar), the leak measurement is started au-
tomatically, provided that automatic start is activated.
If the gas pipeline is airtight (does not have a leak) or if the pipeline volume is large and
the leak small (> low pressure drop), (CONTINUE) can be pressed. After an additional 60
seconds, the leak rate measurement is started. In the case of “leak measurement with
regulator in line”, the pipeline pressure is automatically reduced to 1 hPa (mbar) under the
nominal operating pressure set, so that the pressure regulator fully opens and no gas can
continue to flow during the measurement.
9.3.4 Leak rate measurement
After the measurement has started, the current pressure (P)
in the gas pipeline, the pressure drop (dP) calculated up to
this point and the elapsed time of the measurement period (t)
are shown.
If the pressure in the gas pipeline to be tested has dropped
by more than 0.9 hPa (mbar) or if the measurement takes
longer than 5 minutes, the internal magnetic valve is opened
and gas from the gas pipeline can flow through the compari-
son leak.
The magnetic valve is closed after the comparison measure-
ment (dP > 0.9 hPa (mbar) or t > 5 minutes) is completed.

Instruction Manual Dräger P7-TD
15

The end of the comparison measurement is indicated acoustically. The result of the leak
rate measurement is now analyzed and shown:
The display shows the mean pressure “P”, the measured leak
rate “L(t)”, the leak rate with regard to the nominal operating
pressure “L(n)” and the volume “Vol” of the gas pipeline. The
volume is not shown for the “leak measurement with regulator
in line”. If the leak rate is indicated with negative values, the
pressure increased in the pipeline during the measurement. If
the leak rate is smaller than -0.2 l/h or larger than 20 l/h, the
leak rates are marked with ERR and in doing so, give a warn-
ing regarding measurement errors. If the pressure dropped below 10 hPa (mbar) or 8 hPa
(mbar) during the measurement or the comparison leak measurement, “P” is marked with
ERR and the measurement is inapplicable. If the measured volume is smaller than 1 l or
larger than 300 l, the volume reading is marked with ERR because the leak rate meas-
urement can be incorrect.
The documentation menu is opened using (CONTINUE).
9.4 Tightness tests according to DVGW TRGI 2018 process sheet G 600
A tightness test must be conducted and documented for every new or significantly modi-
fied gas installation.
For this tightness test, the pressure in the gas pipeline to be tested must increased to
somewhat more than 150 hPa (mbar) according to DVGW TRGI 2018.
After the stabilization period for temperature equalization, the pressure in the gas pipeline
to be tested is measured for the required time period. The stabilization periods and test
times are each defined according to the volume of the line (line sections) to be tested.
9.4.1 Automatic tightness test
The P7-TD enables a direct selection and an automatic iden-
tification of the gas pipeline volume.
The automatic identification of the gas pipeline volume can
be helpful for significantly changed operating lines because
these lines can, for the most part, be flush-mounted and
therefore, concealed.
In the case of automatic measurement, the pipeline volume is
determined after connecting the gas pipeline to the measur-
ing device.
To do so, the pressure in the pipeline to be tested is in-
creased to approximately 30 hPa (mbar) using the pump of
the measuring device.

Instruction Manual Dräger P7-TD
 16

If the stabilization period is over or (CONTINUE) was pressed,
the volume measurement starts.
The result with the corresponding stabilization and measure-
ment period is shown.
Using (CONTINUE), the stabilization period and test time (e.g.
10/10min.) resulting from the volume range is accepted.
After selecting the pipeline volume, the gas pipeline is
pumped up and the current pressure in the pipeline (P) and
the already elapsed pump time (t) are shown.
The pump process can be terminated using (CONTINUE) even
if the required test pressure has not yet been reached.
If the pressure reached the test pressure, the internal pump
is automatically stopped.
The duration of the stabilization phase and the test time is defined according to the select-
ed pipeline volume.
The remaining sequence of a tightness test is described in Chapter 11.1.
9.4.2 Tightness test with external pump acc. to DVGW TRGI process sheet G 600
The flow rate of the P7-TD pump is approx. 1 l/min. The pressure increase to 100 hPa
(mbar) for a gas pipeline volume of 100 l takes approx. 15 min. Therefore, it makes sense
to work with an external pump, to shorten the time for pressure increase.
After starting the tightness test and connecting the gas pipe-
line to the P7-TD, the measuring device gives the instruction
to establish the pressure in the line.
Connect the external pump to the gas pipeline using a valve
and increase the pressure.
The P7-TD starts the stabilization phase using (CONTINUE).
The duration of the stabilization phase and the test time is defined according to the select-
ed pipeline volume.
The remaining sequence of a tightness test is described in Chapter 11.1.

Instruction Manual Dräger P7-TD
17

9.5 Stress test acc. to DVGW TRGI process sheet G 600
9.5.1 Regulations for low pressure systems
A stress test must be conducted prior to the tightness test for gas installations for new low
pressure systems (operating pressure < 100 hPa (mbar)).
To do so, the pressure in the gas pipeline must be increased to 0.1 MPa (1 bar).
After temperature equalization (there is no time specified), the pressure in the gas pipeline
is measured for 10 minutes.
9.5.2 Regulations for medium pressure systems
A combined stress and tightness test must be conducted for
gas installations in new medium pressure systems (operating
pressure 100 hPa (mbar) to 0.1 MPa (1 bar)).
To do so, the pressure in the gas pipeline must be increased
to 0.3 MPa (3 bar).
After temperature equalization (3 hours), the pressure in the
gas pipeline is measured for
2 hours. The test duration must be prolonged by 15 minutes
per additional 100 l volume for pipeline volumes exceeding 2,000 l.
9.5.3 Starting a stress test
If the 0.3 MPa (3 bar) test was selected, the pipeline volume must be indicated first.
The 0.3 MPa (3 bar) test can only be executed with an external high pressure sensor.
Set the pipeline volume and the measurement period determined based on it and start the
measurement using (CONTINUE).
If the 0.1 MPa (1 bar) test was selected, the stress test is started immediately.
Connect the pipeline to be tested with the pressure inlet of the measuring device marked
with “bar” using a pressure hose with a pneumatic quick coupling NW 5 and connect the
external pump to the line via a valve.
Increase the pressure to 0.1 MPa (1 bar) or for medium pressure systems, to
0.3 MPa (3 bar).
Low pressure systems: The measuring device defines the duration of the
stabilization phase depending on the pressure stability in the gas pipeline (2 to 10 min). A
test time of 10 minutes is required for the measurement.
Medium pressure systems: A 3-hour waiting period is required for the stabilization
phase. The measuring device defines the duration of the measurement (at least 2 hours)
depending on the pipeline volume entered, according to the regulations of the TRGI
G 600.
The remaining sequence of a stress test is described in Chapter 11.1.

Instruction Manual Dräger P7-TD
 18

10. Testing drinking water installations
According to DIN EN 806-4, the tests required for drinking
water installations can either be conducted using water or
with air or inert gas.
Tests for drinking water installations with water can only
be conducted with an optional external high pressure
sensor. If tests are conducted using the internal pressure
sensor, the device can be damaged!
For hygienic reasons, a test using water should not be conducted until immediately after
commissioning the drinking water installation.
For this, please also refer to the VDI (Association of German Engineers) Guideline VDI
6023 “Hygiene in Drinking Water Installations” and the ZVSHK (The German Sanitation,
Heating and Air Conditioning Association) data sheet “Tightness Testing of Drinking Water
Installations”.
10.1 Testing of drinking water installations using air
The following tests can be selected:
Tightness test = start of the automatic tightness test
Tightness external pump = start of the tightness test with extern pump
Stress test up to DN50 0.3 MPa (3 bar) = start of a stress test at 0.3 MPa (3 bar)
(external sensor)
Stress test up to DN100 0.1 MPa (1 bar) = start of a stress test at 0.1 MPa (1 bar)
10.1.1 Fully automatic tightness test
Up to a pipeline volume of 100 l a test time of 120 minutes is
required for the measurement. The test time must be pro-
longed by 20 minutes per additional 100 liters of pipeline vol-
ume. The duration of the stabilization phase is not specified
and is defined depending on the pressure stability in the
drinking water installation pipeline (2 to 10 min).
The measurement period is automatically calculated depend-
ing on the volume.
Connect measuring device and drinking water installation and start measurement. The
current pressure (P) and the elapsed pump time (t) are shown. After reaching the test
pressure, the stabilization for temperature equalization is automatically started.
The remaining sequence of a tightness test is described in Chapter 11.1.

Instruction Manual Dräger P7-TD
19

10.1.2 Tightness test with external pump
Until the tightness test is started, the function equals the fully automated tightness test
(Chapter 10.1.1 on page 18).
After starting the tightness test and connecting the drinking
water installation pipeline to the measuring device, the pres-
sure in the line must be increased. Connect the external
pump to the drinking water installation pipeline using a valve
and increase the pressure to 155 hPa (mbar). The stabiliza-
tion phase begins using (OK). The duration of the stabilization
phase is not specified and is defined depending on the pres-
sure stability in the drinking water installation pipeline (2 to
10 min).
The remaining sequence of a tightness test is described in Chapter 11.1.
10.1.3 Stress test up to DN 50 0.3 MPa (3 bar) and up to DN 100 0.1 MPa (1 bar)
The stress test is conducted with an external pump for pres-
sure increase.
The 0.3 MPa (3 bar) test can only be executed with an
external high pressure sensor.
Connect the water pipeline to be tested with the pressure in-
let of the measuring device marked with “bar” using a pres-
sure hose with a pneumatic quick coupling NW 5 and start
the measurement.
Connect the external pump to the pipeline using a valve and increase the pressure.
Up to DN 50: Increase the pressure to 0.3 MPa (3.0 bar).
Up to DN 100: Increase the pressure to 0.1 MPa (1.0 bar).
Switch to the stabilization phase using (CONTINUE).
The duration of the stabilization phase for temperature equalization is not specified; the
P7-TD defines the duration depending on the pressure stability in the pipeline (2 to
10 min). A measurement period of 10 minutes is required for the measurement.
The stabilization phase can be terminated manually and you can switch to testing using
(CONTINUE); the remaining sequence is described in Chapter 11.1.