TESTO CU-2 User manual

testo CU-2
User Manual

2

Content
3
Content
1 Declaration of Warranty ...............................................................................................6
1.1. Type of Designation....................................................................................................................... 6
1.2. Manufacturer................................................................................................................................6
1.3. Warranty.......................................................................................................................................6
2 Precautions...................................................................................................................6
2.1. Foreword ......................................................................................................................................6
2.2. Liabilities.......................................................................................................................................6
2.2.1. Liability toContent............................................................................................................... 7
2.3. Copyright © ..................................................................................................................................7
3 Safety............................................................................................................................7
3.1. Risk Types...................................................................................................................................... 7
3.1.1. Electrical Safety ...................................................................................................................7
3.2. Labelsand Explanations.................................................................................................................7
4 System Overview..........................................................................................................8
4.1. Introduction..................................................................................................................................8
4.1.1. testo CU-2 Digital Control Unit.............................................................................................8
4.1.2. testo NanoMet Software...................................................................................................... 8
4.2. Definitions.....................................................................................................................................8
4.3. Abbreviations, Units and Symbols.................................................................................................. 8
4.4. The System.................................................................................................................................. 10
4.4.1. Overview........................................................................................................................... 10
4.4.2. Functionality......................................................................................................................10
4.5. Control Elements and Connections.............................................................................................. 11
4.5.1. Front and Rear View .......................................................................................................... 11
4.5.2. Additional Analog and Digital In- and Output Connector 20)............................................... 12
5 Installation and Setup.................................................................................................12
5.1. Hardware Setup........................................................................................................................... 12
5.2. Windows Embedded and NetworkSetup..................................................................................... 12
5.2.1. Windows Embedded Login................................................................................................. 12
5.2.2. Network Settings............................................................................................................... 13
5.3. testo NanoMet Software Startup and Operation Mode Selection................................................. 13
5.3.1. Manual Operation Mode.................................................................................................... 13
5.3.2. Software Control Mode...................................................................................................... 14
5.3.3. Remote Computer Software ControlMode ........................................................................ 14
5.4. AK Host Remote Control Mode.................................................................................................... 15
6 testo NanoMet Operation...........................................................................................17
6.1. Main Measurement Tab.............................................................................................................. 17
6.1.1. Pause State........................................................................................................................ 17
6.1.2. Standby State .................................................................................................................... 17

Content
4
6.1.3. Measurement state ........................................................................................................... 18
6.1.4. Leak Test........................................................................................................................... 18
6.1.5. Zero Test............................................................................................................................ 18
6.2. Measurement Configuration........................................................................................................ 19
6.2.1. UN-ECE R83 Measurement and Test Cycle Definition.......................................................... 19
6.2.2. General Measurement Settings.......................................................................................... 20
6.3. System Configuration .................................................................................................................. 20
6.3.1. Measurement Instruments................................................................................................. 20
6.3.2. DilutionInstruments.......................................................................................................... 21
6.3.3. AK Interfaces ..................................................................................................................... 22
6.4. Analog Input and Output Signals Configuration............................................................................ 22
6.4.1. Analog In ........................................................................................................................... 23
6.4.2. Analog Out......................................................................................................................... 23
6.4.3. Digital Out / Errors............................................................Fehler! Textmarke nicht definiert.
6.5. PNC Tab....................................................................................................................................... 24
6.6. testo NanoMet Control Panel and CPC Window........................................................................... 24
6.6.1. testo NanoMet Control Panel............................................................................................. 24
6.6.2. CPC Window...................................................................................................................... 25
7 AK Host Operation......................................................................................................25
7.1. AK Software Integration............................................................................................................... 25
7.2. AK Interfaces Specifications......................................................................................................... 25
7.2.1. Serial Interface................................................................................................................... 25
7.2.2. TCP/IP Interface................................................................................................................. 26
7.3. AK Protocol Specification............................................................................................................. 26
7.3.1. AK Command Telegram...................................................................................................... 26
7.3.2. AK ResponseTelegram....................................................................................................... 26
7.3.3. General AK Protocol Description........................................................................................ 27
7.3.4. Handling of Certain Conditions........................................................................................... 27
7.4. List of All AK Commands.............................................................................................................. 28
7.4.1. Control Commands – 'S'..................................................................................................... 28
7.4.2. Write Commands – 'E'........................................................................................................ 28
7.4.3. Read Commands – 'A' ........................................................................................................ 28
7.5. Descripton of All AK Commands................................................................................................... 29
7.5.1. Control Commands – 'S'..................................................................................................... 29
7.5.2. Write Commands – 'E'........................................................................................................ 30
7.5.3. Read Commands – 'A' ........................................................................................................ 32
7.5.4. AK Errors List..................................................................................................................... 34
8 Electrical Connections.................................................................................................35
8.1. Mains Supply............................................................................................................................... 35
8.2. Dilution/Conditioning Devices...................................................................................................... 36
8.3. Analog/Digital Interface............................................................................................................... 36
8.4. Standard Embedded Computer Ports........................................................................................... 37
9 Maintenance and Calibration...................................................................................... 38

Content
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9.1. Storage, Acclimatization.............................................................................................................. 38
9.2. Operation Environment Requirements......................................................................................... 38
10 Appendix.....................................................................................................................39
10.1. Extent of Delivery........................................................................................................................ 39
10.2. Specification, Technical Data....................................................................................................... 39
10.3. Designation of All testo CU-2 Digital ControlUnit Operating Elements......................................... 40

1
Declaration of Warranty
6
1Declaration of Warranty
Manual Version History:
Version: V1.03
Date: November 2018
1.1. Type of Designation
This user manual refers to the instrument and software type and version as listed below. It
replaces all previously dated user manuals for this instrument.
Type: testo CU-2
1.2. Manufacturer
Testo SE & Co. KGaA Tel: [phone]
Testo-Strasse 1 Fax: [phone]
79853 Lenzkirch web: www.testo.com
Germany email:[email protected]
For technical support contact your local service contractor or Testo techsupport.
email: su[email protected]
1.3. Warranty
Testo SE & Co. KGaA warrants that this product adheres to the specified properties for a period
of twelve (12) months from the date of delivery.
Excluded from the warranty are all parts subjected to normal wear as any fuses, batteries or
other consumable parts. Also excluded are: Defects resulting from abnormal use, in particular
outside the intended purpose; lack of maintenance; improper use or malicious damage. Warranty
is void if actions are carried out which are not described in the documentation nor authorized by
Testo SE & Co. KGaA.
Testo SE & Co. KGaA does not provide any warranty on finished goods manufactured by others.
Only the original manufacturer's warranty applies.
There are no user-serviceable parts inside testo CU-2 and some very sensitive parts. Do not
open your testo CU-2, as you may damage it. Warranty is voided if the case is opened and
warranty-seal is broken.
Parts repaired or replaced as a result of repair services are warranted to be free from defects in
workmanship and material, under normal use, for 90 days from the date of shipment.
2Precautions
2.1. Foreword
This manual guides you through the installation, starting up, operation and maintenance
procedures of the testo CU-2. In detail you will find information about the system as
•safety
•functionality of the testo CU-2, technical information and specifications
•installation of the testo CU-2 and accessories
•handling, operation, maintenance and troubleshooting
Follow the instructions provided by this manual for safe and proper operation of the testo CU-
2 Digital Control Unit.
Before installing and operating the testo CU-2, the operator or service has to
read carefully this manual. For improper function, damages or injuries caused
by ignoring the instructions by this manual no liabilities are accepted.
2.2. Liabilities
Testo SE & Co. KGaA accepts no liability to improper function or injury caused by
•neglecting the instructions provided by this manual or instructed person.
•improper installation, operation, application, or maintenance.
•operation by untrained staff.

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Safety
7
•any technical modification not carried out by Testo SE & Co. KGaA or an authorized
service partner.
For operating the testo MD19-3E Rotating Disk Diluter and testo ASET15-1 Air
Supply / Evaporation Tube together with testo CU-2 Digital Control Unit, refer to the related user
manuals.
2.2.1. Liability to Content
The content of this manual is generated with most accurateness. Testo SE & Co. KGaA does not
guarantee completeness, correctness and being up to date. Testo SE & Co. KGaA reserves the
right to revise the content of the manual at any time and without notice.
2.3. Copyright ©
All work and contents done or generated by Testo SE & Co. KGaA are subject of the German
copyright © and law for intellectual property. This copyright includes all specification data of the
instrument or part of it, electrical and fluidic and mechanical schematics, pictures, diagrams and
text. Copying, editing, publishing or any other utilisation requires a written agreement of
Testo SE & Co. KGaA.
3Safety
3.1. Risk Types
The diagram in Fig. 3.1 shows typical risks that could cause damage or injury while handling the
testo MD19-3E Rotating Disk Diluter or testo ASET15-1 Air Supply / Evaporation Tube. These
risks may also occur if these or other devices are used in combination with testo CU-2.
Fig. 3.1: risk types
Refer to the user manuals of the devices connected to the testo CU-2 digital control unit to learn
more about the risks which may occur operating them.
3.1.1. Electrical Safety
When in operation any electrical equipment can produce dangerous voltages. Failure to observe
the warnings may result in serious injury or damage. It is, therefore, mandatory that only suitably
qualified personnel use this instrument. Satisfactory and safe operation of this instrument calls for
proper handling in transportation, storage, installation as well as careful control and maintenance.
3.2. Labels and Explanations
Listed labels, Caution and Warning are explained in general, and the further specific labels refer
to type of hazard and danger.

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System Overview
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Warning
Warning means that improper operation could cause a serious human or
instrument damage or injury with consequence of irrevocable instrument
damage.
Electric Shock
Hazardous voltage. Contact may cause electric shock or burn. Turn off and lock
out system power before servicing.
Electric Ground
This sign indicates that the mains connector and cabinet ground are connected
to protective earth PE.
4System Overview
4.1. Introduction
4.1.1. testo CU-2 Digital Control Unit
testo CU-2 Digital Control Unit is an accessory for the testo MD19-3E which is the Rotating Disk
Diluter with external diluter head for performing the primary dilution as close as possible to the
aerosol source. testo CU-2 is equipped with interfaces to control testo MD19-3E Rotating Disk
Diluter and testo ASET15-1 Air Supply / Evaporation Tube and to read the digital signal of a
condensation particle counter CPC. Besides, several analog and digital input and output signals
can be handled.
4.1.2. testo NanoMet Software
The testo NanoMet software is intended to control the testo CU-2 Digital Control Unit and
therewith the connected particle measurement components like testo MD19-3E Rotating Disk
Diluter and testo ASET15-1 Air Supply / Evaporation Tube. The testo NanoMet software also
allows the user to read a digital signal from a CPC and to determine the functions of the analog
ports of testo CU-2.
The testo NanoMet software supports AK protocol. This permits the communication with an AK
host computer and therewith the easy integration of the testo CU-2 controlled particle
measurement system into a test rig.
4.2. Definitions
testo MD19-3E third generation of Testo Rotating Disk Diluter with external diluter head
for primary dilution as close to the emission source as possible
testo ASET15-1
Testo Air Supply / Evaporation Tube unit supplies dilution air to the
testo MD19-3E primary diluter and undertakes the thermal conditioning
and secondary dilution of the aerosol
Raw gas undiluted aerosol from the emission source
Dilution air filtered and therewith particle free compressed or ambient air which is
fed to the primary or secondary diluter
Measuring gas primary or secondary diluted aerosol from the emission source
(combustion engine or CVS).
4.3. Abbreviations, Units and Symbols
LED Light Emitting Diode
signal lamps at the front of testo MD19-3E, testo ASET15-1, and
testo CU-2
CVS Constant Volume Sampler
test rig component; combustion engine exhaust dilution tunnel

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System Overview
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AK ArbeitsKreis VDA (working committee of German automotive industry
alliance)
de facto standard communication protocol for test bench
components
PND1 primary Particle Number Diluter (ECE R83 compliant abbreviation)
Testo testo MD19-3E Rotating Disk Diluter
DF
PND1
primary Dilution Factor dilution factor of PND1 (testo MD19-3E)
PND2 secondary Particle Number Diluter (ECE R83 compliant abbreviation)
diluter part of testo ASET15-1
DF
PND2
secondary Dilution Factor dilution factor of PND2 (testo ASET15-1)
PCRF Particle Concentration Reduction Factor (ECE R83 compliant
abbreviation)
total dilution factor comprising DF
PND1
, DF
PND2
and particle losses
f
r
overall dilution (=
concentration reduction) factor used as equivalent
of PCRF
PNC Particle Number Counter (ECE R83 compliant abbreviation)
e.g. engine exhaust condensation particle counter EECPC from TSI
CPC Condensation Particle Counter
product name of particle number counter manufactured by TSI
EECPC Engine Exhaust Condensation Particle Counter
product name of ECE R83 compliant PNC manufactured by TSI
Q
MD
primary diluted measuring gas flow from the testo MD19-3E primary
diluter
Q
AS
secondary dilution air flow from the air supply part of testo ASET15-1
Q
MG
secondary diluted measuring gas flow to the connected instrumentation
Q
EX
excess secondary diluted measuring gas gas flow

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System Overview
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4.4. The System
4.4.1. Overview
Fig. 4.1 : testo ViPR system consisting of testo CU-2, testo MD19-3E, and testo
ASET15-1
Fig. 4.1 shows a testo ViPR system consisting of testo CU-2 Digital Control Unit, testo MD19-3E
Rotating Disk Diluter, testo ASET15-1 Air Supply / Evaporation Tube. Together with an engine
exhaust condensation particle counter (e.g. TSI 3790 EECPC or GRIMM 5.431) this system
meets PMP requirements and can be controlled via Ethernet.
4.4.2. Functionality
testo CU-2 Digital Control Unit is built in a standard 19" case and therewith can be integrated into
a 19" rack together with other devices like the controlled testo ASET15-1 with integrated testo
MD19-3E.
An embedded computer is built in with Windows Embedded Standard as operating system. This
permits to operate the unit in different modes: Manual control, local software control, remote
computer software control via Ethernet, or control by host computer via AK interface.
Besides the Testo aerosol conditioning system consisting of testo MD19-3E Rotating Disk Diluter
and testo ASET15-1 Air Supply / Evaporation Tube a TSI 3790 EECPC, GRIMM 5.431 or another
CPC particle counter can be controlled via serial port and up to 5 analog signals from other
external sources can be logged.
Data logged by testo CU-2 can be saved on the integrated flash memory, a USB memory stick or
to any network storage Windows Embedded can access via Ethernet.

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System Overview
11
4.5. Control Elements and Connections
4.5.1. Front and Rear View
Fig. 4.3: front view of testo CU-2
Fig. 4.3 shows the front of testo CU-2. There are no control elements except the power LED 1)
indicating if the device is switched ON or OFF. All connectors and the mains switch are located at
the rear side which is shown in Fig. 4.4. The testo CU-2 is either completely controlled via
Ethernet or locally by using keyboard, mouse and VGA monitor which can be connected to the
according ports.
Fig. 4.4: rear view of testo CU-2
1 Power LED
2 testo ASET15-1 Air Supply / Evaporation Tube (PND2 + VPR) interface
3 testo MD19-3E Rotating Disk Diluter (PND1) interface
4 male 25 pin D-Sub connector for analog and digital in- and output signals
5 USB connector of embedded computer
6 USB connector of embedded computer
7 USB connector of embedded computer used as default port for GRIMM 5.431 for
PMP R-83 measurements
8 USB connector of embedded computer
9 not used
10 LAN 2 connector of embedded computer; default setting: DHCP
11 LAN 1 connector of embedded computer; default IP adress: 192.168.1.129
12 VGA monitor connector of embedded computer
13 Male serial connector 1 of embedded computer used as default port for EECPC 3790 for
PMP R-83 measurements
14 Male serial 2 connector of embedded computer
15 not used
16 Female serial 3 connector to control testo CU-2 by AK host computer
17 Mains connector
18 Fuse holder; fuse: 250 V, 5.0 A, t
19 Mains switch
8

5
Installation and Setup
12
The properties of the devices connected to testo CU-2 are specified in appendix A.2
4.5.2. Additional Analog and Digital In- and Output Connector 20)
testo CU-2 is delivered with a female connector 20) which is shown in Fig. 4.5. This connector
can be plugged into the external signals port 4). It is equipped with solder pins which can be used
as contacts for different analog and digital inputs and outputs:
•5 analog input signals (–10...+10 VDC).
•3 analog output signals which are configured by the testo NanoMet software
(0...+10 VDC).
•a digital input signal (0 or 5...25 VDC) which can be used to trigger data logging
•2 digital alarm outputs delivering a 24 VDC signal in case of an error detected by the
testo NanoMet software. These alarm signals are also configured individually by the testo
NanoMet software.
Fig. 4.5: front and rear of external in- and output signals connector 20)
The pin assignment of the external signals port 4) and the specific connector 20) is described in
chapter 8.3.
5Installation and Setup
Note: Numbers –e.g. 2) = testo ASET15-1 interface –refer to the operating elements illustrated
in chapter 4.5 and appendix A.3.
5.1. Hardware Setup
There are no big efforts to install testo CU-2 and combine it with testo MD19 Rotating Disk Diluter
and testo ASET15-1 Air Supply / Evaporation Tube.
Simply use standard 25 pin D-Sub cables to connect these devices to testo CU-2. The remote
control interface connector of the stand-alone testo MD19-3E is located at the rear side of the
testo MD19-3E laboratory case. If testo MD19-3E is integrated in an testo ASET15-1, the
interface connectors of both components are situated at the rear of the testo ASET15-1 case.
Both interfaces have to be connected to connectors 2) and 3) at the rear side of testo CU-2.
If analog input signals should be recorded or provided by testo CU-2, these external devices
might be connected to the external signals port 4), using a standard 25 pin D-Sub cable with
female connector, or using the external signals connector 20). Two alarm voltage signals can
also be tapped from the external signals port 4) and a trigger signal can be applied to start and
stop data logging. The pin assignment of the external signals port 4) and therewith the
connector 20) is described in chapter 8.3.
Connect the testo CU-2 to your computer network or directly to a host computer using a
crossover network cable, if the system should be remote controlled via Ethernet, use a 9 pin
RS-232 cable to connect it to an AK host computer, or add a VGA monitor, keyboard and mouse
to work directly on the testo CU-2.
The different operation modes are described in chapters 5.3 and 5.4.
5.2. Windows Embedded and Network Setup
5.2.1. Windows Embedded Login
testo CU-2 Digital Control Unit is delivered with Microsoft Windows Embedded installed. There
are two Windows users predefined:
user name default
password windows user rights remarks

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Installation and Setup
13
Admin Admin no restrictions only recommended for remote
desktop operation and system setup
e.g. integration in local network
CU-2 CU-2 limited rights recommended standard user, automatically logged after system
boot up
For more detailed information or to integrate the testo CU-2 into your network please contact your
network administrator.
When the device is switched on, the embedded computer boots and the testo NanoMet software
is automatically started. The duration of operation system and testo NanoMet software startup is
about 100 seconds. After this time the system is ready for either manual operation of the dilution
system, or testo NanoMet software control, or AK host computer control.
5.2.2. Network Settings
testo CU-2 is equipped with two RJ45 sockets to connect the device to a Ethernet network. By
default the LAN 1 connection has no fix IP address but is set to DHCP while LAN 2 has assigned
the fixed IP address 192.168.1.129. LAN 1 connection using may be used to connect the device
to a network equipped with a DHCP server. LAN 2 is intended to be used for a direct connection
to a Windows PC using a crossover network cable.
As all other Windows settings the properties of both LAN connections can be changed in the
Windows system control panel when logged in as administrator.
The testo CU-2 can be found in the network either by using the IP address or the computer
name. The default computer name consists of the part 'testo-' and the serial number of the
individual device, e.g. 'testo-101999'.
5.3. testo NanoMet Software Startup and Operation Mode Selection
Plug in the power cable to the mains connector 17) and switch on the testo CU-2 unit using the
mains switch 19). Windows Embedded Standard boots and the testo NanoMet software is
automatically started. The system is ready for measuring appr. 100 seconds after switching on
the testo CU-2.
If a monitor is attached or the system is controlled by Windows desktop connection the testo
NanoMet user interface shown in Fig. 5.1 appears on the screen.
Fig. 5.1 : testo NanoMet user shell after system startup
5.3.1. Manual Operation Mode
After startup, the testo NanoMet software runs in the manual operation mode. The software
control menu contains the red 'Enable Software Control' button as shown in Fig. 5.2. Either the

5
Installation and Setup
14
user can activate software control or the AK host computer can get control access via Ethernet or
serial port.
Fig. 5.2 : testo NanoMet control menu after software startup
Otherwise it might be helpful to remain in manual operation mode if dilution parameters have to
be determined like dilution factors or the total diluted measuring gas amount.
Neither the testo NanoMet software nor the AK host computer controls testo MD19-3E and testo
ASET15-1, even if they are physically connected to testo CU-2. The devices are locally operated
by the control elements at their front panels according to the instructions in the specific user
manuals. testo NanoMet software and AK host can read and log data provided by testo CU-2.
Data logging by testo NanoMet software is started by pushing the 'start data logging' button. The
AK interface is running in the background. Only AK read 'A' commands are possible. Control and
write commands from AK host are responded with 'state = busy' and the AK system runs in
'manual mode'
5.3.2. Software Control Mode
By clicking the software control button, the operator decides the testo NanoMet software to take
control over the aerosol conditioning system, i.e. testo MD19-3E Rotating Disk Diluter and testo
ASET15-1 Air Supply / Evaporation Tube. The software control button turns to grey and could
now be used to disable software control and return to manual control mode.
In software control mode, the system is operated via testo NanoMet user interface. The testo
NanoMet software has prior access to the data acquisition modules.
The AK interface is still running in the background. Only AK read 'A' commands are possible.
Control and write commands from AK host are responded with 'state = busy' and and the AK
system runs in 'manual mode'.
Manual software control mode is mostly used for system configuration, field measurement, or if
no other computer is available. It is possible to work directly on the embedded computer using
monitor, mouse, and keyboard directly connected to the control unit testo CU-2.
5.3.3. Remote Computer Software Control Mode
The system can be controlled by a remote-desktop connection. This is mostly used for
measurements on test-benches if the user operates in a control room and the devices are
mounted in a test cell. It is also used for system checks and configuration changes via Ethernet
without the need of being personally present.
The user directly works on the testo NanoMet software by using a remote-desktop connection. In
this case the operator has the screen from the embedded computer on his workstation monitor
and works on the embedded computer.
The remote desktop connection can be established using the remote desktop connection
software which is installed by default on Microsoft Windows XP professional or newer.
Appropriate remote desktop protocol (RDP) clients are also available for a number of other
operating systems like Windows 2000, 9x, and NT4, but also Mac OS X, Linux and others.
After startup of the RDP software, the testo CU-2 can be found in the network either using its
network computer name (e.g. 'matter-101999') or its IP address which are described in chapter
5.2.2.
The Windows Embedded Standard log-in window appears which is shown in Fig. 5.3.

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Installation and Setup
15
Fig. 5.3: log-in window
Even if the testo CU-2 system is started by default with the standard user 'Matter' without a
password needed, administrator rights are required for remote desktop operation.
An administrator account is created by default with both user name and password: Administrator
(mind the capital letter at the beginning of the password).
If you try to log-in as 'Administrator' for the first time after system startup, i.e. if the standard user
'Matter' is logged in, the message shown in Fig. 5.4 appears.
Fig. 5.4 : standard user log-out message
Confirm by clicking 'Yes' to log-out 'Matter' and change the user to 'Administrator'. After logging in
the testo NanoMet software is automatically started in the manual operation mode described in
chapter 5.3.1 with the control menu shown in Fig. 5.2.
5.4. AK Host Remote Control Mode
Using testo CU-2, the particle number measurement system can be integrated in a test rig. The
testo CU-2 Digital Control Unit can then be controlled by a host computer connected by serial
RS232 port or Ethernet connection. Communication protocol is AK over TCP/IP or RS232.
Detailed AK protocol specifications can be found in chapter 7.
A second host computer can be connected via Ethernet optionally. Only one of the host
computers can control the connected devices but the second one is able to read data using
AK 'A' commands.
The testo NanoMet software has to be in the Manual Operation Mode which is the default mode
after system start up. Then the AK master computer (Host A) can send remote command 'SREM'
to get priority. The testo NanoMet user interface will then be deactivated (software control mode
not available but data still can be read and recorded) and the second host (Host B) can only
execute 'A' commands. This is illustrated in the flow chart of Fig. 5.5.

5
Installation and Setup
16
Fig. 5.5: testo NanoMet operation modes flow chart
The command 'SMAN' ends priority state of the master computer (Host A), operator may then
control the diluters manually, switch to software control and use the testo NanoMet software, or
the other host computer (Host B) can get priority by sending 'SREM'. In this case Host A can only
execute AK 'A' commands until Host B ends its priority by sending 'SMAN'.

6
testo NanoMet Operation
17
6testo NanoMet Operation
The testo NanoMet user shell consists of the testo NanoMet main window, the testo NanoMet
control panel, and the CPC control window.
The testo NanoMet main window contains five tabs to set measurement parameters, to select
operation mode and system state, to display the measured values and to do the data saving
settings.
6.1. Main Measurement Tab
The 'Measurement' tab shown in Fig. 6.1 includes the software control menu which was already
described in chapter 5.3.1. It also displays the measured values, contains a chart where the
selected values are plotted, and an error bar at the bottom of the window, where auto-detected
errors are displayed.
Fig. 6.1: measurement tab
For every plotted signal it can be selected if the left or right y-axis should be used. In the chart
settings area, minimum and maximum values of these axes can be set. This is done
automatically if 'y auto scale' is selected. The set minimum and maximum values are useless
then. The 'x scale interval' determines how many seconds should be plotted in the chart. Default
value is 60 seconds, maximum is 1200 seconds = 2 hours.
The system state buttons in the software control menu are active when the system is operated in
the software control mode, as it is shown in Fig. 6.2. The system state is selected using these
buttons. The actual system state is marked by the red button.
6.1.1. Pause State
PAUSE state means that all pumps and heatings of testo MD19-3E and testo ASET15-1 are
switched off.
6.1.2. Standby State
STANDBY state means the system is ready for measurements. Pumps for sample gas and
dilution air are switched on as well as the heaters of primary dilution head and the evaporation
tube. Only the diluter disk is not rotating and therewith the dilution air passes the diluter without
being added by any amount or raw gas.

6
testo NanoMet Operation
18
Fig. 6.2: testo NanoMet control menu in software control mode
6.1.3. Measurement state
In the MEASUREMENT state the disk starts to rotate. The system is ready to measure.
6.1.4. Leak Test
UN-ECE R83 reglementations require a system leakage test to be executed prior to each
measurement test cycle. This leakage test is effected by feeding filtered air into the inlet of the
entire particle sampling system. The particle counter shall then report a measured concentration
of less than 0.5 #/cm
3
.
This test can be performed automatically selecting the LEAK TEST state in the testo NanoMet
control menu. In this state all parameters are set as in the measurement state except that the
primary diluter disk is not rotating.
This means no raw gas is added and therewith the filtered dilution air passes the dilution system
instead of measuring gas. If the detected particle concentration does not recede to zero, either
the secondary dilution air flow is set too low which leads to ambient air sucked through the
excess air outlet port, or some leakage occurs, probably caused by a filter defect, by a failure at
the diluter disk, an untight connection, or by a sensor defect.
The leak test will start when 'start data logging' is clicked if the LEAK TEST state is selected.
After 2 minutes test duration the system returns to the STANDBY state. The data logged during
the leak test are saved in the selected data folder.
6.1.5. Zero Test
A PNC zero test is required once a day for UN-ECE R83 applications. In terms of this test filtered
air has to be feeded to the particle counter PNC. The PNC shall then report a measured
concentration of ≤ 0.2 #/ ⁠ cm
3
. The PNC shall showan increase in measured concentration to at
least 100 #/ ⁠ cm
3
when challenged with ambient air and return to ≤ 0.2 #/ ⁠ cm
3
when filtered air is
applied again.
The ZERO TEST state of the testo NanoMet software cannot supply ambient air to the PNC but
filtered air can be provided by the testo ASET15-1 when the primary dilution air supply is turned
off and neither measuring gas nor dilution air passes the evaporation tube and only dilution air
enters and leaves the secondary mixing chamber. If the amount of secondary dilution air exceeds
the inlet flow of the PNC, it can only draw filtered air. Ambient air can be provided by manually
pulling off the tube connector from the testo ASET15-1 measuring gas outlet.
If the PNC signal does not recede to zero during the zero test, either the secondary dilution air
filter or the sensor might be faulty.
The indicated particle concentration values during the zero test are recorded and saved in the
selected data folder during 2 minutes when 'start data logging' is clicked.
The ZERO TEST can also be used to isolate the reason for leakage found in a leak test. If the
signal turns to zero in the zero test but not in the leak test, the leakage will probably be found in
the primary dilution subsystem.

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6.2. Measurement Configuration
The 'Config Measurement' tab shown in Fig. 6.3 serves to set the measurement parameters. It
will be selected what should be calculated by the software out of the measured particle
concentration values, how data logging will be started and stopped, and where the logged data
should be saved.
Fig. 6.3: measurement configuration tab
6.2.1. UN-ECE R83 Measurement and Test Cycle Definition
If the 'UN-ECE R83 measurement' button is activated, the measurements will follow a test cycle
consisting of up to 5 parts.
Each test of a cycle will be analyzed and particle number will be calculated in #/km according to
UN-ECE R83. The results are saved in the header of the saved file.
The desired test cycle is selected in the 'test cycle' menu. To change one of these predefined
cycles, it first must be selected, then the cycle name has to be entered in the text field right from
the 'test cycle' menu. The cycle part durations are entered in the fields below, and the newly
defined cycle is saved by clicking on the 'OK and save' button.
For the software to calculate the emissions in #/km, the 'cycle data information' window shown in
Fig. 6.4 appears after the data logging is completed. In this window, the amout of exhaust gas
volume and the virtually covered distance of the tested vehicle have to be entered for every cycle
part for the testo NanoMet software to calculate the emitted particle number per kilometer #/km.
The exhaust gas volume usually is the CVS total volume if the whole engine exhaust stream is
fed to and the particle sample was drawn from the CVS.

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Fig. 6.4 : cycle data information window
6.2.2. General Measurement Settings
On the 'Config Measurement' tab it is also set if data logging will be started by a trigger signal or
manually and stopped manually or after a predetermined cycle time. Furthermore the sample rate
can be set between 2 and 5 Hz, and the signal averaging interval is set. This setting will have a
significant influence on the amount of data generated during the measurements.
By marking the 'include date in timestamp' control the date will also be saved in the first column
of each entry in the data storage file. This option is usually used for long time and overnight
measurements.
In the bottom line of the 'Config Measurement' tab the path can be set where the logged data
should be saved. This can either be locally on the internal memory of the embedded computer,
an added USB storage device, or an accessible folder in the network where the testo CU-2 digital
control unit is implemented.
The default folder for the logged data to be saved by the testo NanoMet software is
'D:\MEASUREMENT DATA' on the internal flash memory of the embedded computer. The
standard user 'CU-2' has no rights to access other folders.
6.3. System Configuration
The system components must be specified in the 'Config System' tab shown in Fig. 6.5. The
round check buttons can be activated independently of each other.
6.3.1. Measurement Instruments
With the round check button, it is set if any testo NanoMet controllable particle detection sensor is
attached and should be used for the measurements, or if just the dilution and conditioning
components testo MD19 -3E Rotating Disk Diluter and testo ASET15-1 Air Supply / Evaporation
Tube are controlled by the testo NanoMet software.
The port where the sensor is attached to the testo CU-2 digital control unit can be set.
Selectable sensors are TSI condensation particle counters CPC 3010, 37xx, engine exhaust
condensation particle counter EECPC 3790, GRIMM 5.431 or the EcoChem PAH monitor
PAS2000. The serial number and the measuring unit can be entered.
Furthermore, a CPC correction factor k can be entered, according UN-ECE R83 regulations. This
factor can be used to compensate a certain CPC signal deviation which possibly has been found
when the sensor has been compared to a reference device.