Intercomparison of Mobility Particle Size Spectrometers

Transcription

1 Intercomparison of Mobility Particle Size Spectrometers Project No.: MPSS Basic information: Location of the quality assurance:, lab: 11 Delivery date: April 1, 01 Setup in the laboratory: April 5, 01 Comparison period: April 5, 01 April 9, 01 Principal Investigator Markus Wallasch Home Institution UBA Wörlitzer Platz1 0 Dessau- Roßlau GERMANY Participant Instrument - Schauinsland MPSS TSI CPC Model 377 SN : Summary of Intercomparison: Pre- status: The Schauinsland MPSS was in good condition. The system is within the range of +/- % of the total reference TSI- CPC Model 30 from. Fil status: The Schauinsland MPSS passed the quality standards of ACTRIS and GAW. 1

2 1.0.01: System arrived in Leipzig.0.01: Leak, flow and rh check of the aerosol Nafion dryer. Setup in lab 130. Time sync : CPC Display is not working - > change during the workshop , 13:1-15:5: Zero & Latex check , 15:3: start ambient overnight - >.0.01, 0: : Back from CPC workshop, another PSL & zero test. It was necessary to clean the CPC..0.01, 15:5: Zero test was fine for Schauinsland MPSS.0.01, 1:1: Flow measurement: 0.97 l/min.0.01, 1:5 1:: Latex 03 nm (peak yesterday was a little too high, now we adjust).0.01, 1:51: start ambient overnight : Kr5 (TSI) changed to Kr5 - > measurement over night : overnight run , 1: : change Kr5 back to origil.0.01: overnight run , :00 List of Components Specification Reference MPSS No. Schauinsland MPSS Position (Line)..1 Company Schauinsland Software.1 CPC Model 377 Model 377 SN: SN : Flow ratio 1.0 : : 5.0 Source Kr5 Kr.5 HV cassette positive positive 1.5kV DMA Hauke medium Hauke medium Flow meas. Aerosol Dryer RH sensor Inlet T sensor RH sensor T sensor Sheath air Dryer p sensor

3 Laboratory setup aerosol standard - zero test - latex 03 nm total flow 0l/min rel. humidity: < 30 % atmosphere lab 11 LINE 1 x Nafion dryers LINE CZ- CHMU Usti MPSS HU- ALMOS K- puszta Homemade DMPS Schauinsland MPSS Zugspitze TSI MPSS modified by Neuglobsow MPSS Waldhof MPSS DE- DWD Hohenpeißen berg MPSS.5. Reference TSI CPC 30 #00 Reference MPSS No.1 Reference TSI CPC 30 #353 Reference MPSS No. Additiol Equipment: vacuum flow 3 Bubble flow meter Gilibrator, Gilian (Sensidyne) Thermo Scientific Nanosphere Size Standard PSL 03nm (±nm) Aerosol nebulizer for PSL (homemade ) Voltcraft multimeter (0-00V), Keysight Technologies

4 Radioactive Source Kr.5 Institute avg. source avg. u- ground difference Schauinsland (mci) CPC Status total CPC SN: 353 Institute CPC Variable Status Comments Total CPC 30, #353 Power Laser Flow Liquid level good good good full CPC Status Reference Instrument No. Institute CPC Variable Status Comments Reference Instrument No., 377 # Saturator Temp Condenser Temp Optics Temp Cabinet Temp Ambient Pressure Orifice Pressure Nozzle Pressure Laser Current 39.1 C.0 C 0.0 C 3.0 C 99. kpa 77. kpa.7 kpa 7 ma CPC Status Schauinsland TSI 377 (could not be checked, button does not work) Institute CPC Variable Status Comments Schauinsland TSI 377 # Saturator Temp Condenser Temp Optics Temp Cabinet Temp Ambient Pressure Orifice Pressure Nozzle Pressure Laser Current

5 Reference Systems during the pre- status night measurement Time Series Figure 01: Time series (April, 01 :00 am April 9, 01 0:00 am) of the integrated particle number concentration (N - 00nm ) of the Reference MPSS and total number concentration (N total ) of the Reference TSI CPC 30. The inversion was performed using software. Multiple charge correction, interl diffusion losses and CPC flow corrections are included. Pre- Status of the Candidate (April 5- th ) Components and zero check Institute System Line Flow Zero Ref l/min 0 # cm - 3 Total CPC l/min 0 # cm - 3 Schauinsland l/min 0 # cm - 3 High voltage calibration Institute System [V] 0 V mv 0 mv 00 mv Reference MPSS No. fil Schauinsland fil

6 Latex 03nm ±nm (pressure 991 hpa, 3.0 C) Institute System Latex 03 [nm] slope Reference MPSS No. fil Schauinsland fil UBA-Schauinsland SMPS, Latex 03 nm +/- nm Peak at Dp = 0.0 nm 'DE-UBA Schauinsland MPSS' 10 Tropos Reference MPSS No., Latex 03 nm +/- nm Peak at Dp = nm ' Reference MPSS No.' raw concentration in #/cm³ raw concentration in #/cm³ particle diameter Dp in nm particle diameter Dp in nm Figure 0: Measurement of latex 03 nm: Particle size distribution (raw concentration) for latex 03 nm on April 5 th, 01. Time Series Figure 03: Time series (April 5, 01 0:00 pm April, 01 0:00 am) of the integrated particle number concentration (N - 00nm ) of the MPSS and total number concentration (N total ) of the reference TSI- CPC Model 30. The inversion was performed using software. Multiple charge correction, interl diffusion losses and CPC flow corrections are included.

7 Particle Number Size Distribution Figure 0: Comparison of mean particle number size distribution of Schauinsland MPSS and Reference MPSS No. from April 5, 01 9:00 pm until April, 01 05:00 am. Multiple charge correction, interl diffusion losses and CPC efficiency are included for the Reference MPSS No.. Correlation Reference MPSS No. N -00nm [#/cm³] ; pm ; 7am b =0.09 ± R² = Reference TSI CPC 30 SN 353 N total [#/cm³] Figure 05: Linear regression between the number concentrations of the Reference MPSS No. and Reference TSI CPC Model 30 (SN 353). Multiple charge correction, interl diffusion losses and CPC flow corrections are included. 7

8 DE-UBA Schauinsland MPSS N -00nm [#/cm³] ;pm ; 7am b =0.935 ± R² = DE- RR total TSI CPC 30 SN 353 N total [#/cm³] Figure 0: Linear regression between the number concentrations of the Schauinsland MPSS and Reference TSI CPC Model 30 (SN 353). DE-UBA Schauinsland MPSS N -00nm [#/cm³] ; pm ; 7am b =1.017 ± R² = DE- RR MPSS No. N -00nm [#/cm³] Figure 07: Linear regression between the number concentrations of the Schauinsland MPSS and Reference MPSS No.. Multiple charge correction, interl diffusion losses and CPC flow corrections are included.

9 Fil Status of the Candidate (April - 9 th ) Time Series Figure 0: Time series (April, 01 :00 am April 9, 01 0:00 am) of the integrated particle number concentration (N - 00nm ) of the MPSS and total number concentration (N total ) of the reference TSI- CPC Model 30. The inversion was performed using software. Multiple charge correction, interl diffusion losses and CPC flow corrections are included. Particle Number Size Distribution Figure : Comparison of mean particle number size distribution of Schauinsland MPSS and Reference MPSS No. from April, 01 :00 am until April 9, 01 05:00 am. Multiple charge correction, interl diffusion losses and CPC efficiency are included for the Reference MPSS No.. 9

10 Correlation 1x 3 Reference MPSS No. N -00nm [#/cm³] ; am ; 5am b =0.90 ± R² = x 3 Reference TSI CPC 30 SN 353 N total [#/cm³] Figure 1: Linear regression between the number concentrations of the Reference MPSS No. and Reference TSI CPC 30 SN 353. Multiple charge correction, interl diffusion losses and CPC flow corrections are included. 1x 3 DE-UBA Schauinsland MPSS N -00nm [#/cm³] ; am ; 5am b =0.57 ± R² =0.9 1 DE- RR total TSI CPC 30 SN 353 N total [#/cm³] 1x 3 Figure 13: Linear regression between the number concentrations of the Schauinsland MPSS and Reference TSI CPC 30 SN 353. Multiple charge correction, interl diffusion losses and CPC flow corrections are included.

11 1x 3 DE-UBA Schauinsland MPSS N -00nm [#/cm³] ; am ; 5am b = ± R² =0.99 DE- RR MPSS No. N -00nm [#/cm³] 1 1x 3 Figure 1: Linear regression between the number concentrations of the Schauinsland MPSS and Reference MPSS No.. Multiple charge correction, interl diffusion losses and CPC flow corrections are included. 11