DL-Systeme LTG 750 User manual

DL-Systeme für Messtechnik GmbH, Steinbeisstraße 32, 73614 Schorndorf
www.dl-systeme.de Page -1-
Leakage tester LTG 750
Instructions for use
Instructions for use
LTG 750

DL-Systeme für Messtechnik GmbH, Steinbeisstraße 32, 73614 Schorndorf
www.dl-systeme.de Page -2-
Leakage tester LTG 750
Instructions for use
Contents
Switching-on and start Page 3 - 6
Entering a manufacturing number or a serial number Page 7
Selecting, defining the test program, Page 8
and other settings
Selecting the test program Page 9
Redefining or reprocessing the test program Page 10 - 12
Import and export of programs Page 13
The expert pages Page 14
Setting-up the IP-address Page 15-16
Setting the date and time Page 17
Settings for saving the measured values on Page 18
a network drive/ shared network folder
Version 1.4 onwards
Saving measured values USB and Page 19 - 20
network folder
The web interface Page 21 – 22
The socket interface port 1401 and 1402 Page 23 – 25
The socket interface port 23 Page 26 – 28
Installation of an SW-Update in LTG750 Page 29 - 31
Declaration of conformity Page 32
Pin assignment/ adapter connector Page 33
Power supply/ air supply Page 34

DL-Systeme für Messtechnik GmbH, Steinbeisstraße 32, 73614 Schorndorf
www.dl-systeme.de Page -3-
Leakage tester LTG 750
Instructions for use
Switch on
The leakage tester is switched on with the On/Off button. The switch engages in the On
position and the diode glows in blue when the 24 V DC operating voltage is available.
The following is shown on the display one by one upon start:
-at first white display approx. 5s
-Windows interface approx. 15 s
-Logo DL systems approx. 5s
-Operational view
The display
The display is a resistive touch-screen display. Inputs can be made by lightly tapping with
the finger or with a plastic stylus on the surface. Although the surface is made of scratch-
resistant glass, input helps like a ball pen or other metallic objects are to be avoided. No
input is necessary at the display for operating the test sequences.
The operational view
The view is divided in
five areas from top to
bottom.
- Specifications for
testing
- Measured value display
and date / time
- Bar graph display of the
results of measurement
and testing
- Bar graph display of the
test sequence
- Message window

DL-Systeme für Messtechnik GmbH, Steinbeisstraße 32, 73614 Schorndorf
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Leakage tester LTG 750
Instructions for use
Specifications for testing
The specifications for testing with the selected test programme and the related test
number are shown in the upper grey field. In the middle the conducted tests are shown,
which have been carried out after selecting the test programme. In addition, also the
number of tests which were I.O. (in order). With the button "Function pre-selection" one
reaches at first the level of password entry and then goes further to the level for
programme selection and for creating a test programme.
Measured value display
In the two display fields given in yellow, the fill pressure is always shown on the left. The
dependency of the test method appears in the right display:
-the pressure drop during the pressure drop method
-the differential pressure in the differential pressure method
-the flow in the flow method
respectively in the defined unit. The fill pressure is always shown. The differential pressure
or the flow is shown only when the rest period starts. In case of an error message, the
displays continue to be shown till the error message is corrected using the stop or the start
button.
Bar diagram of the measurement and test results
In the time from start
till measurement, a
bar graph display
appears in the middle
of the view, in which
the fill pressure is
shown as a grey bar.
The green area is the
permissible defined
area. The light-green
marking shows the
reference value of the
fill pressure.

DL-Systeme für Messtechnik GmbH, Steinbeisstraße 32, 73614 Schorndorf
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Leakage tester LTG 750
Instructions for use
Bar graph display of the test sequence
In the lower bar "test time", the individual test phases are shown through coloured fields.
Their meaning is as follows:
- LDZ Load time turquoise
- FZ Filling time yellow
- RZ Rest period green
- MZ Measurement time magenta
- LZ Ventilation time blue
Within the areas, a grey progress bar runs from left to right after the start and shows the
current test time.
Display when errors occur:
If the test sequence is
in the measurement
period, the middle bar
changes to a bar graph
with display of the
permissible area in
green, the reference
value in light-green and
the deviation from
reference value as the
grey bar graph.
The clear text
statement about the
test is given in the
message window
below.

DL-Systeme für Messtechnik GmbH, Steinbeisstraße 32, 73614 Schorndorf
www.dl-systeme.de Page -6-
Leakage tester LTG 750
Instructions for use
Message window
The statements for the test as well as the error messages are shown in the lower yellow
window.
The colour of the message window changes to green in case of OK message and to red in
case of NOK message.
Start of test sequence
The start of the test sequence is done exclusively via the Start button. A test, which is OK,
is shown with a screen in green.
Stopping the test sequence
The test sequence can be terminated at any time with the Stop button. A termination, an
NOK message and an error message are shown with a screen in red.

DL-Systeme für Messtechnik GmbH, Steinbeisstraße 32, 73614 Schorndorf
www.dl-systeme.de Page -7-
Leakage tester LTG 750
Instructions for use
Entering a manufacturing number or a serial number
Entering this number is optional. If the LTG750 does not measure, it can be entered if
required using a connected keyboard or a (power-saving) 2D or barcode scanner.
Display without number: Display for the input:
A maximum of 30 characters can be entered.
The following characters are allowed:
"0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-/_.:!?#+*"
This can be used for a serial number, for it the serial number must be entered before every
measurement.
It is entered once before the test of the series as a manufacturing number, lot number or
batch number. The number is saved when switching off and becomes available again the
next time the system is switched on.
The number then appears in the measurement files (CSV-Files on the USB-Stick and on
the network drive) and on the socket interface.

DL-Systeme für Messtechnik GmbH, Steinbeisstraße 32, 73614 Schorndorf
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Leakage tester LTG 750
Instructions for use
Select, define test programme and other settings
The button "Setup" is visible at the end or before a test sequence. Tapping this button
leads one to the password query.
The password hierarchy differentiates between:
Operator and responsible person for the test programmes,
e.g. foreman, setter, service.
Following are shown here:
-the button for programme selection
-the selected language
-the serial number of the device
-the IP settings: DHCP, IP address and subnet mask
-Button "Finish" for ending the dialogue
The password is a
three-digit number.
The password is 770
for the operator.
An input can be
deleted character by
character with the
Delete button
(backspace key = BS)
The OK button can
also be activated by
pressing the return
button.
Other functions are
released and shown
using other
passwords.
One reaches the
function selection after
entering the correct
password. Functions
that are inaccessible
are not shown.
Only the button
"Select programme" is
accessible to the
operator.

DL-Systeme für Messtechnik GmbH, Steinbeisstraße 32, 73614 Schorndorf
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Leakage tester LTG 750
Instructions for use
The persons responsible for the programmes have here an
extended selection
Following are shown here:
-the button for Edit programmes
-the button for programme selection
-the selected language (can now be selected)
-the serial number of the device
-the IP settings: DHCP, IP address and subnet mask
-Button Expert Page (set date, time, IP settings)
-Button "Finish" for ending the dialogue
Select test programme
By entering the
foreman password
550, one gets the
following selection.
After pressing the
button "Select test
programme", the
dialogue given
alongside is shown
with the activated
test programmes.
The programmes can
be tapped =
selected.
The selected
programme is shown
on the right side with
the test settings.
Apply with the button
"Finish".

DL-Systeme für Messtechnik GmbH, Steinbeisstraße 32, 73614 Schorndorf
www.dl-systeme.de Page -10-
Leakage tester LTG 750
Instructions for use
Redefine or edit test programme
All the available programmes are shown on the left side. Unlike during selection, where
only the active programmes are present.
Upon tapping the programme (if needed, scroll down with the bar directly near the
programme list), the programme parameters are shown.
Via the list of name of the currently selected programme.
In the middle column, the measurement method, the subsequent programme, the
measuring times and the test settings.
In the right column, the settings of outputs for the additional board, if available.
The setting of the standard outputs and the selection, whether the programme should be
active (only then it is shown in the programme selection).
If a programme may be used by another one as the subsequent programme, it may not be
deactivated.
A message appears and the checkbox is deactivated.
At the same time, one gets a message, in which programmes is the currently selected one
referenced.
Buttons on the page:
-Edit: Active only when a field is selected, which permits an input
-Save programme: The changes are stored under the programme name
-Programme Import Export: Activated, if a USB stick having the format exFat is
inserted.
-Finish: Exiting the dialogue

DL-Systeme für Messtechnik GmbH, Steinbeisstraße 32, 73614 Schorndorf
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Leakage tester LTG 750
Instructions for use
Inputs for a test sequence programme
Activate programme
A test sequence programme can be activated or deactivated. Only the activated test
programmes appear in the selection list.
Test specimen
A name or an identifications number of the specimen can be entered here. The name
appears in the selection list, above in the display and in the test log.
Measurement method
Depending upon the device type, the measurement method: Pressure drop, minimum
pressure drop, differential pressure or flow can be selected here. Only the permissible
methods are shown.
Next test
A next test programme for a subsequent testing can be selected here. This is carried out
only when the current programme has been conducted as OK.
Time values of the test sequence programme
Inputs are made in seconds for: Load time, fill time, rest period, measurement time and
ventilation time. The keyboard is changed for the numeric input.
Fill pressure inputs
Subsequently, the inputs are made for min. and max. fill pressure. These are monitored
and determine the green area in the graph. The input of fill pressure defines the reference
value, the light-green line in the graph as starting point for the bar graphs.
Measurement tolerance
Thereafter, the measurement tolerance is entered depending upon the test method.
Pressure drop: max. pressure drop and maximum pressure increase
Minimum pressure drop maximum pressure drop and maximum pressure increase
Differential pressure: positive and negative differential pressure
The value input is always positive here.
Flow method: max. flow
The measurement tolerance determines the green tolerance field and is monitored.

DL-Systeme für Messtechnik GmbH, Steinbeisstraße 32, 73614 Schorndorf
www.dl-systeme.de Page -12-
Leakage tester LTG 750
Instructions for use
Inputs
If a field is selected for input, the button "Edit" becomes activated.
Upon pressing this button, a dialogue appears for entering the parameters. A description,
which parameters are to be entered, is given in the upper row.
The display of the dialogue depends upon upon the fact whether it is a numeric or an
alphanumeric input.
e.g. programme name:
All other fields (time and pressure values) as follows:

DL-Systeme für Messtechnik GmbH, Steinbeisstraße 32, 73614 Schorndorf
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Leakage tester LTG 750
Instructions for use
Import Export programmes
In order to simplify the data transfer to another device, or to save the settings, it is possible
to export and import the programmes.
The button is activated only when a USB stick having the exFat format is inserted in the
USB slot.
The following dialogue appears upon pressing the button "Import Export Programme".
The buttons have the following functions:
-Export programme: Exports the selected programme (the one from the dialogue
Edit programme) to the stick. This programme is also shown in the field above the
buttons.
-Export all programmes: All 255 programmes are exported to the stick.
-Import programme: The button is activated only when a programme for importing is
present on the stick. This programme on the stick replaces the programme, which is
shown in the field via the buttons.
-Import all programmes: The button is activated only when a file with all programmes
for importing is present on the stick.
All buttons are deactivated when the stick is removed.
The states that are available and the actions executed appear in the output field on the
right.

DL-Systeme für Messtechnik GmbH, Steinbeisstraße 32, 73614 Schorndorf
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Leakage tester LTG 750
Instructions for use
The Expert Page
The expert page is needed for setting the date or the time and for setting the IP address.
The buttons have the following functions:
-Set IP address: The control panel is opened for setting the IP address. Exact
description is given below
-Set: Dialogue for setting date and time is opened
Description given further below
-Keyboard on: The Windows keyboard is shown
-Keyboard off: The Windows keyboard is no longer shown
-Finish: The dialogue is ended

DL-Systeme für Messtechnik GmbH, Steinbeisstraße 32, 73614 Schorndorf
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Leakage tester LTG 750
Instructions for use
Set IP address
The control panel and the keyboard are opened when the button is pressed.
A double-click must be made here on "Network and Dial-up Connections". Alternatively,
select and press "Return" on the keyboard.
Following view appears:
Select here "DM9CE1" and double-click or press "Return" on the keyboard.

DL-Systeme für Messtechnik GmbH, Steinbeisstraße 32, 73614 Schorndorf
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Leakage tester LTG 750
Instructions for use
This dialogue is half-hidden behind the keyboard. One can push it near the keyboard by
dragging it at the blue bar above.
The settings for the IP address are to be made here.
Exit the dialogue after completion with "OK" (near the X). Close all other dialogues with X
in the top right corner.
One then reaches the Expert page again. But with the keyboard switched on.
One can/must hide the keyboard again with the button "Keyboard off".

DL-Systeme für Messtechnik GmbH, Steinbeisstraße 32, 73614 Schorndorf
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Leakage tester LTG 750
Instructions for use
Set date and time
Upon pressing the button "Set", the dialogue for setting the time and the keyboard are
shown. The dialogue is hidden half below the keyboard and must be dragged in the free
area with the blue bar in the Clock dialogue. Thereafter, one needs to switch on the
keyboard again (button "Keyboard on")
The date, time and, if applicable, the time zone can be set now.
Close the dialogue with "OK" near the X and switch off the keyboard again (button
"Keyboard off")

DL-Systeme für Messtechnik GmbH, Steinbeisstraße 32, 73614 Schorndorf
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Leakage tester LTG 750
Instructions for use
Option: Version 1.4.0.0
Settings for saving the measured values on a network drive/ shared network folder
Using the checkbox, select if it must be saved on a
network folder.
The key can be used to test the entries. The result is
displayed in the window next to it on the right.
The data is saved and is available again when it is
switched on the next time.
The test key checks the settings and attempts to create a file “LTG750-Test.txt” in the
network drive.
The settings were correct
Wrong settings
In case of problems, please consult your network administrator.
A Log-on window may pop up under some situations
and it must be acknowledged 2-3 times with X to the
top right without input.
The connection to the network drive is established
automatically while saving the measured values.
In case of problems, please consult your network administrator.

DL-Systeme für Messtechnik GmbH, Steinbeisstraße 32, 73614 Schorndorf
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Leakage tester LTG 750
Instructions for use
Save measured values USB and Network folder
It is possible to save a data record automatically for every measurement.
The data records end up in a daily CSV-File in the annual folder.
This happens automatically after every measurement.
The data records in the file look like this:
Testnumber;Program;TestMethod;TestResult;MessageIFNOK;StartDateAndTime;TesttimeInSec;UpperLimit;LowerLimit;test
pressureatthestart;Testpressureattheend ;FilltimeInSec; Idle periodInSec;Ventilation timeInSec;Nameoftest specimen;Seriesnumber
2748;1;2;2;0;25.06.2016 07:39:58;10,0;20,000;20,000;1,800;-0,095;2,0;5,0;2,0;Test Differential pressure;1234+
2748;2;1;2;0;25.06.2016 07:40:09;5,0;1000,000;1000,000;1,800;0,157;2,0;2,0;1,0;Test Pressure drop;1234+
2748;3;1;2;0;25.06.2016 07:40:13;1,0;200,000;200,000;1,798;-0,024;1,1;1,0;1,0;threeiouio;1234+
2748;4;1;2;0;25.06.2016 07:40:18;1,1;20,000;20,000;1,798;-0,081;1,0;1,1;1,0;four;1234+
2748;1;2;2;0;25.06.2016 07:40:39;10,0;20,000;20,000;1,800;1,965;2,0;5,0;2,0;Test Differential pressure;1234+
2748;2;1;2;0;25.06.2016 07:40:49;5,0;1000,000;1000,000;1,801;0,272;2,0;2,0;1,0;Test Pressure drop;1234+
The first line is the heading, after that the measured values follow. One line for each test.
The decoding of the numbers is described in the socket interface.
The file can also be opened with a double-click with Excel:
Generally there are 2 options for saving.
The USB-Stick (configuration not required, simply insert a USB with the list “LTG750-MW”
in the root), after that the data is written for every complete measurement in a file as
follows:
The date is included in the name of the file.
The files are written in the list “LTG750-
MW” in a sub-folder with the year.
Functionality: If a USB with the correct list is inserted, the measured values are saved. If it
does not get inserted or the list is not available, nothing is saved.
Write on a Network drive. For this, the necessary settings must be made on the expert
page.
There are same folder structures and the same files as on the USB-Stick.
However, here extensions are made because it is susceptible to faults.

DL-Systeme für Messtechnik GmbH, Steinbeisstraße 32, 73614 Schorndorf
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Leakage tester LTG 750
Instructions for use
Problems which could occur:
The network drive is not available. The measured values cannot be saved.
The LTG750 discovers a disconnection and shows this after the 4th measured value with a
red window along with the date/time display. Even less measured values in the buffer
trigger this notification if 2 attempts to access the network drive are unsuccessful.
Errors which could occur:
LAN Err 1 = Network drive could not be connected
LAN Err 2 = File could not be opened
LAN Err 3 = File could not be created
LAN Err 4 = all 5 files could not be accessed for writing
The lower figure is the measured values buffered at the
moment. Maximum 100 units
A maximum of 100 last measurements are buffered. After that the old ones are lost.
If the measured values are needed, a working network functionality must be looked
out for.
Since a network folder is involved, it is possible that a different user is processing or
viewing the file. Then accessing the file is not possible.
The LTG 750 then attempts to create a new file. With the extension –x in the name. X can
have the values 1-3. A total of 4 files can be created to enable secure storage.
If all 4 files cannot be accessed, again up to 100 measured values are collected, as
described above. From the 4th measured value, the error message appears again.
If the network connection starts working again within the time till the 100 measured values
accumulate, measured values are not lost.