Temperature Control, Inlet Pressure Measurement | Teledyne 651

Teledyne API Ultrafine Particle Monitor - Model 651

Technical Description

The critical pressure ratio is found by dividing the absolute pressure downstream of the orifice PD, by the absolute pressure upstream of the orifice PU. This ratio must be below 0.528 for air.

Critical pressure = PD ≤ 0.528

PU

The following pressure values are displayed on the Status screen and can affect the Model 651 flow.

Pressure Value

Vacuum

Inlet Pressure

Nozzle Pressure

Description

The vacuum pressure The inlet pressure.

The differential pressure across the sensor flow orifice

Temperature Control

The temperatures of the conditioner, growth tube, and optics are nominally maintained at 20°C, 60°C, and 60°C, respectively, with specified ambient temperatures in the operating range of 10°C to 40°C. Temperatures are controlled through feedback circuits on the main electronics board and are displayed on the Status screen on the front-panel display.

Note: For ambient temperatures outside the instrument operating range, the instrument temperature performance may not be maintained. Moderate increases in conditioner temperature will raise D50 a small amount.

Vacuum Supply

The external vacuum supply must be sufficient to maintain the sample flow at 0.12 L/min along with the auxiliary and transports flows. The recommended supply is 4 SLPM at 400 mbar absolute pressure.

Inlet Pressure Measurement

With an adequate vacuum supply, the Model 651 can operate at inlet pressures in the range of 75 to 105 kPa. The inlet pressure is measured by an absolute pressure sensor and is equal to the barometric pressure if no inlet restriction is present.

07506C DCN6727

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Image 59

Teledyne 651 operation manual Temperature Control, Inlet Pressure Measurement

Contents

Model Page Trademarks This page intentionally left blank F e t y M e s s a g e s R N I N G Laser Safety R r a n t y This page intentionally left blank V i s i o n H i s t o r y O u t T h i s M a n u a l Viii Contents Particle Counting Maintenance, Service, and Troubleshooting SFC Set Flow Rate Calibration Constant G u r e s Table A-1 B l e s Xiv G a n i z a t i o n How This Manual is OrganizedR p o s e T t i n g H e l p L a t e d P r o d u c t L i t e r a t u r e A P T E R Product OverviewO d u c t D e s c r i p t i o n Parameter Specification Specification s Water System Parameter W i t W o r k s Physical Features 2illustrates the flow system of the Model Model 651 Flow System Schematic C k i n g L i s t Unpacking and Setting Up the Model P a c k i n g Model 651 Maintenance Kit PN DU0000169 Remove Protective Caps InstallationConnecting the Water Supply Equipment Bracket Screw Connecting the Water Supply Connecting the Aerosol Supply Connecting the Water Exhaust Tube Connecting the Aerosol Supply Nozzle Securing Inlet Screen Assembly in Place Installing the Model 651 in a Rack Connecting Power and Warming up the Model Connecting the USB Cable Warm-up Screen Preparing the Model 651 for Shipping and Storage Moving and Shipping ModelMoving the Model 651 Short Distances 07506C DCN6727 Display Instrument DescriptionO n t P a n e l Status Messages Indicator Light C k P a n e l Vacuum Supply T e r n a l I n s t r u m e n t C o m p o n e n t sOptics Module Internal Clock Water SystemFans Circuit Boards RS-232 Serial Connections Data Communication Ports Ethernet Communication Port 07506C DCN6727 C o m m e n d e d O p e r a t i o n P r o c e d u r e s Outdoor Operation ProceduresInstrument Operation E r a t i n g P r e c a u t i o n s Standard Operation Procedures Home Screen ∙ Status ∙ Setup ∙ TotalR m u p S p l a y / U s e r S e t t i n g s Status Description Setup Screens OFF On AfterWarmup SET Time Address Mask Total Screen 07506C DCN6727 E o r y Technical Description Sensor S i g n o f t h e M o d e l 6 5 Pulse Height Critical Flow Flow System Inlet Pressure Measurement Temperature Control Water Removal System Page 07506C DCN6727 T a l C o u n t a c c u r a c y Particle Counting Concentration = Total counts V e T i m e C o u n t i n g Concentration = N × t N c e n t r a t i o n M e a s u r e m e n t 07506C DCN6727 T a l i z e r M o d e 07506C DCN6727 Ethernet Computer Interface Commands, and Data CollectionM p u t e r I n t e r f a c e Programs and Features Choose Turn Windows features on or off Flash Drives Line Flash Memory Data Files Example of data record RS-232 Serial Communications USB Communications Parameters Terminal Communications SET M m a n d sRead 07506C DCN6727 07506C DCN6727 U t i o n Maintenance, Service Troubleshooting P l a c e m e n t P a r t s K i t s M o v i n g t h e C o v e r M o v i n g a n d Install i n g t h e W i c k T e A n g i n g t h e F i l t e r s R o s o l F l o w C h e c k s Model 651 Flow Schematic E a n i n g t h e W a t e r B o t t l e E a n / R e p l a c e t h e O r i f i c e s S p e c t i n g a n d C l e a n i n g t h e F a n s S p e c t L i q u i d L i n e s A t u s M e s s a g e s Troubleshooting Troubleshooting INLET/DRAIN T u r n i n g t h e M o d e l 6 5 1 f o r S e r v i c e C h n i c a l a s s i s t a n c e W S t a t i c C h a r g e s a r e C r e a t e d Primer on Electro Static Discharge Static Generation Voltages for Typical Activities Sensitivity of Electronic Devices to Damage by ESD M m o n M y t h s a b o u t E S D D a m a g e General Rules S i c P r i n c i p l e s o f S t a t i c C o n t r o l 07506C DCN6727 Working at an Anti-ESD Work Bench Working at the Instrument Rack Transferring Components from Rack to Bench and Back Opening Shipments from Teledyne API’S Customer Service Packing Components for Return to TAPI’s Customer Service 100 07506C DCN6727 Read SET Commands Command Explanation Read Commands RAI A D C o m m a n d sRAI Read Analog Input Voltage Rall Rall Read Operating Condition RCT RCT Read Current TimeRD Read Displayed Concentration RIF RIE Read Instrument ErrorsRIF Read Aerosol Flow Rate RIE RIS RIS Read Instrument StatusRL Read Laser Current RPV Read Vacuum Pressure RLL Read Liquid LevelRPA Read Absolute Pressure Transducer RPN Read Nozzle Pressure Transducer RRD RRD Read Data Record RRS RTA Read Cabinet TemperatureRTC Read Conditioner Temperature RRS Read Status Record RV Read Firmware Version Number RTG Read Growth Tube TemperatureRTO Read Optics Temperature T C o m m a n d s SM Set Mode SFC SA Set Auxiliary Flow ValveSFC Set Flow Rate Calibration Constant SR Set Real-time Clock SP Set Pump Vacuum Sstart Sstart Starts a New Sample ST Set Transport Flow T a R e p o r t i n g R e c o r d s Pstd RecordCNT Tinlet Record Status Aerosol inlet 43, 45 Index External vacuum source Orifice Teledyne Contact Information Index-5