9/4/2010

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AMS Users Community Annual Meeting Attendance

Over 400 Published Articles

The Aerodyne AMS GroupDoug/John

• Wade Robinson• Bill Brooks

• Manjula Canagaratna• Leah Williams• Bill Brooks

• Donna Sueper• Joel Kimmel• Ed Fortner• Phil Croteau

• Leah Williams• Tim Onasch• Sally Ng• Paola Massoli• Andy Lambe• Thorsten Hohaus

• Jesse Kroll • Eben Cross • Brent Williams• Achim Trimborn Cameron Martin

9/4/2010

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Jose’s AMS Wiki Pagehttp://tinyurl.com/tofams

Man als• Manuals• FAQs• Operation/Calibration Procedures• Software

R f i f ti• Reference information

Aerodynamic LensMass SpectrometryAerosol composition

AMS Development ActivitiesData analysis

Mathematical procedures to deconvolve spectra

CIMS…

Ellipsoidal Mirror

PMT

Ellipsoidal Mirror

PMT

Ellipsoidal Mirror

PMT

Ellipsoidal Mirror

PMT

Aerodynamic LensMeasurable size range

Soft IonizationMolecular ion

SP-AMS Black carbon

Containing aerosol

Aerosol composition

LaserLaser

Light ScatteringParticle density

Thermal desorberAerosol Volatility

identification

Overall goal is rapid real-time characterization of size, composition and density.

Thermal DenuderAerosol Volatility

9/4/2010

3

AMS Hardware and Issues9:20 - 9:35

• AMS vacuum system y• Vacuum Interlock System• AMS Pump Controller • Instrument Maintenance• Thermal Denuder System

Li ht tt i HW d SW• Light scattering HW and SW• Sample line flow controller• Porta-Met station

Varian Turbo Pump Lifetimes

• V81 pumps appear to be failing more frequentlyfrequently.

• Tracked history of 185 turbos delivered since 2008 (37 systems)…

• 23% returned/exchanged. • Failure rate of V301 = 25%; V81 = 22%.

Statistics are skewed by a few bad casesStatistics are skewed by a few bad cases• No. of returns P2=11, P3=3, P4=13, P5=7,

P6=8 • Prompted a closer look at pump usage

9/4/2010

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• Re evaluation of utilization of pumps on

Varian Turbo Pump Performance on AMS Chamber

• Re-evaluation of utilization of pumps on AMS chamber.

• Pump pressure measurements.• Pump vibration measurements.

Turbo Pump Plumbing Diagram

RPRP

Cascade arrangement

P5

P4P3

P2

P6

MD1

RP

VP

VP VP

AMS vacuum Chamber

V301V301

CT1

CT2

CT3

RP Roughing port

key

8th Annual Meeting 2007 Reno

Backing PumpRP RPVP

RP Roughing port

Vent port

CT2 ConvecTorr gauge

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ConvecTorr1

P6

Pressure Measurement Positions on AMS

ConvecTorr3

P2

P3P4

P5

P6

ConvecTorr2

n ra

nge

Varian pump backing pressures

AM

S op

erat

ion

P2 vent portP3 vp

P2 vent port

P4 vp

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• Pump backing pressures, temperatures and electrical load are more than

Varian Turbo Pump Summary

and electrical load are more than acceptable.

• Varian writes letter endorsing application on AMS system (cascading of pumps with small diaphragm backing pump).

Varian acknowledges a problem with V81…..

Work with Pfeiffer turbos….ACSM

Valve closed.P inlet = 0.044P MD1 = 0.85 speed 14/20

Pump Statistics Software

speed 14/20

Valve OpenP inlet = 1.33P MD1 = 4 60P MD1 = 4.60 speed 14/20

Know the pump values for your systemIUTA

P2 runs ~15C above ambient

9/4/2010

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PKU P4 pending failure?

Unstable current

and

elevated temperature

Varian introduces TwisTorr TechnologyCompression ratio improvement of up to 100x compared to

MacroTorr

• Available on 2300, 850 and 750 Turbos

• V81 and V301, beta testing in 2011

9/4/2010

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1.0

Characteristic Pump Vibration SpectraP3 V81 full speed 1350 Hz

Lower CageBalance

1.0m

10m

100m

LogM

ag, m

/s²rm

s

G2, 2 X: 1.344k Y: 661.6m

Vib

ratio

n Le

vel Upper Cage

0 500 1.0k 1.5k 2.0k100µ

Hz

Pump Frequency, Hz

V

CharacteristicV81M pump V301 pump

Three Characteristic Vibrational Modes

CharacteristicBalance 1300-1400 Hz

(pump speed)< 3000 m/s2

925-975 Hz(pump speed)< 2400 m/s2

Upper Cage (bearing)

475-525 Hz< 225 m/s2

360-400 Hz< 180 m/s2

B tt C 359 H 359 HBottom Cage (bearing)

359 Hz< 200 m/s2

359 Hz< 180 m/s2

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Summary of Turbo Pump Vibration Measurements

– All the turbos “see” each other, vibrational modes from neighboring pumps show up in the measured pump.

– Spacing rotational speeds between pumps can help reduce vibration levels, but each system appears to be unique.

– We are delivering new systems at P2=963Hz, P3=1250Hz, P4=1100Hz, P5=963Hz, P6=1150Hz.

– If your pumps are running fine at the default speeds we don’t recommend changing speed.

RH and T Data for an AMS ShipmentChina to ARI

9/4/2010

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About the Inter-lock System• Two different electrical circuits for ToF

AMS systemsy– TPS (P5)– Vaporizer and vaporizer bias (P4 and P6).

a problem can exist if P6 fails

• Master interlock (software) will shut down all pumps triggering both electrical circuits.

Pump Control Firmware UpdatesMost recent version 4.45

//****************V4.43****************** // active breaking // fi d P 5 ff t t t bl (ACSM l )

Master Interlock, softstart, active braking, pump speed setting.

// fixed Pump 5 off at restart problem (ACSM only)

//****************V4.44******************// corrupt display problem with this version// Implements Varians fix for V81 speed setting.

//****************V4.45******************// pump speeds saved, read and set at power up.

9/4/2010

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Aerosol Sample Line Flow ControllerDec 2009

Simple low power and light weight

Pulls flow thru a cyclone inlet and delivery line tubing.

Combines a blower and a mass flow meter with active flow regulation.

Easily incorporated into the AMS and ACSM systems but can also be used for other instrumentation.

Aerodyne Research, Inc. 45 Manning Road Billerica, MA 01821 www.aerodyne.com (978)663-9500

ARI Aerosol Sample Line Flow Controller

Dimensions: 5” H x 6-1/2” W x 14” D (13 cm x 17 cm x 36 cm)Weight: 8 pounds (3.6 kg)Power: 40W (24VDC)Fl t l T ti il bl

Dec 2009

Flow control range: Two options available. 3-12 LPM or 6-22 LPM (10” H2O)

Gas Connections: ½” Swagelok Electrical: 24Vinput via AMP connector size17 CPC 206036-2

BNC flow signal output (for recording purposes, 1-5V fs)

Aerodyne Research, Inc. 45 Manning Road Billerica, MA 01821 www.aerodyne.com (978)663-9500

9/4/2010

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Thermal Denuder Control System Improvements• Addition of a 3rd valve to maintain constant flow thru both heated and by-pass paths• New control electronics

N l f• New control software

To u

ser

supp

lied

pum

pLight Scattering

• We have working hardware and ft f i itisoftware for acquisition…

• Analysis tools are developing– Donna, Eben, community…

9/4/2010

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PortaMetPortable Meteorological Station

Remote Head Base Unit

Remote head contains met sensors and is actively ventilated by a fan. I just added the aluminum shield for

additional solar baffling.

Optional base unit provides easy data logging to a USB stick with date/time stamp ands also has a GPS engine.

The remote head can be operated independently from the base unit with a direct connection to any RS232 port.

GPS antenna 12VDC power

Rear panel connections

USB stick Data cable – RJ12

RS232

Currently not connected

USB stick

Solid state storage.

(Do not use USB hard drive)

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PortaMetPortable Meteorological Data Logger

• Wind speed• Wind direction• RH• RH• Temperature• Dew Point• Barometric pressure• Solar intensity• GPS Data (with base unit only)GPS Data (with base unit only)• Date/Time stamp (with base unit only)

User selectable data rates: 5, 10, 15, 30, 60 seconds.Data logging to USB thumb drive or RS232

PortaMet Calnex DataE. Spencer

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AMS Maintenance• Clean vacuum chamber surface

Ch k f l / i i• Check for loose/missing connections/fasteners

• Clean cooling fan filters• Check for stressed cables• Always monitor pump performance• Always monitor MD1 pressure (load/no load) • Dirt inside computer• Dirt on computer HD (clean up and defrag)

Corrosion

9/4/2010

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RustCorrosion

Salt corrosion

Inspect Shipping Container

Don’t leave instrument in the shipping container

Fork Lift Damage

9/4/2010

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Missing fasters

Maintenance Issues, cont’d

Maintenance Issues, cont’d

Aluminum dust

Missing fastener, chaffing metal

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Maintenance Issues, cont’d

Dirty fan filter Stressed cables

END Hardware and Issues