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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 show an 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. 

 

 

Summary of Contents for CU-2

Page 1: ...testo CU 2 User Manual...

Page 2: ...2...

Page 3: ...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 Install...

Page 4: ...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 A...

Page 5: ...e 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 Control Unit Op...

Page 6: ...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 voide...

Page 7: ...ther utilisation requires a written agreement of Testo SE Co KGaA 3 Safety 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...

Page 8: ...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 t...

Page 9: ...mpliant abbreviation total dilution factor comprising DFPND1 DFPND2 and particle losses fr overall dilution concentration reduction factor used as equivalent of PCRF PNC Particle Number Counter ECE R8...

Page 10: ...ther 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 di...

Page 11: ...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 connect...

Page 12: ...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...

Page 13: ...th 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 change...

Page 14: ...ftware 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 w...

Page 15: ...wn 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 ho...

Page 16: ...tate 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 s...

Page 17: ...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 determ...

Page 18: ...he 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 b...

Page 19: ...eader 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 f...

Page 20: ...noMet 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 m...

Page 21: ...escribed in the testo MD19 3E user manual The use fr or standard calibration menu in the system configuration tab shown in Fig 6 5 allows to set if measurements should be performed using the attached...

Page 22: ...ale connectors This is done because in this case testo CU 2 is connected to the AK server as a slave while the other COM ports are used to connect other slave devices to testo CU 2 Digital Control Uni...

Page 23: ...log DC voltage range within 10 V DC 10 V DC can be specified to equate a certain signal range Furthermore the signal can be named and serial number and signal unit can be entered which will also be sa...

Page 24: ...nozzle It is also possible to send certain commands to the particle number counter These are to enable or disable the automatic functions autofill and water removal for TSI 37xx models and the butanol...

Page 25: ...apter 5 3 and 5 4 and illustrated in Fig 5 5 An AK host computer can simply take control over the system by sending the SREM command after the software start up if testo NanoMet software control has n...

Page 26: ...d 65535 Default values are 49152 Host A and 49153 Host B Both ports are used at the two IP addresses respectively LAN ports Numbers from 0 up to 49151 should not be used because they are officially re...

Page 27: ...and not a functional engine Therefore the identification respectively the channel number is always K0 Error status is 0 for an error free running of the system The error status number will be counted...

Page 28: ...nds 7 4 1 Control Commands S CODE description SREM REMOTE set system to AK host remote control mode SMAN MANUAL disable remote control and set system to manual operation SRES RESET reset all functions...

Page 29: ...ll AK Commands 7 5 1 Control Commands S SREM REMOTE set system to AK host remote control mode command SREM K0 response SREM E E error status 0 9 SMAN MANUAL disable remote control and set system to ma...

Page 30: ...BS busy exceptions SRES STBY or SPAU will stop the running leak test according the UN ECE R83 regulation the number concentration should be 0 5 ccm the result of this test can be read with the comman...

Page 31: ...dilution factor range 1 11 setpoints out of range are rounded to the next lowest respectively highest possible temperature command EVD2 K0 DDD response EVD2 E E error status 0 9 DDD dilution factor D...

Page 32: ...rrors which are listed in chapter example 11 13 20 means ET temperature wrong CPC not ready CPC liquid level too low AKON read the current diluted and undiluted particle number concentration concentra...

Page 33: ...at example 3 26E5 326 000 ccm if disk rotation is stopped response will be NaN FFF particle concentration reduction factor PCRF format floating point example 100 0 if disk rotation is stopped response...

Page 34: ...g on used disk format floating point example 20 0 RRR DFPND1 primary dilution factor actual value format floating point example 20 2 AVD2 read setpoint and actual value of secondary dilution factor DF...

Page 35: ...Inlet flow rate out of range Orifice pressure is 10 or 90 kPa Apply sufficient external vacuum 18 Aerosol flow rate out of range 19 Laser power low 20 Liquid level low 21 Concentration out of range va...

Page 36: ...1 Air Supply Evaporation Tube 8 3 Analog Digital Interface The pin assignment of the external analog and digital in and output signals interface 4 and connector 20 is shown in Fig 8 1 Fig 8 1 externa...

Page 37: ...N connectors 10 and 11 the VGA monitor connector 12 and the serial ports 13 14 and16 are standard peripherals connections of the embedded computer However some of them are used to connect some measuri...

Page 38: ...n Read this section carefully before setting up testo CU 2 Digital Control Unit Testo SE Co KGaA is not liable if the instrument is damaged caused by the operation environment not meeting the requirem...

Page 39: ...sk Diluter Testo testo ASET15 1 Air Supply Evaporation Tube GRIMM 5 431 TSI CPC 3010 or 37xx or EECPC 3790 or Eco Chem PAS2000 PAH monitor sensors providing analog DC voltage signals 10 10 VDC operati...

Page 40: ...3 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 V...

Page 41: ...10 Appendix 41...

Page 42: ...Testo SE Co KGaA Testo Strasse 1 79853 Lenzkirch Germany phone 49 7653 681 5062 fax 49 7653 681 95062 e mail sales nanoparticle testo de...

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