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Model 3786 Ultrafine Water-based Condensation Particle

1. Command RRA Response A Record see Data Reporting Records section in this Appendix Read Record Control This command returns the current control values in the C record format see below This command is intended for diagnostic use only Command RRC Response C Record see Data Reporting Records section in this Appendix Read Record Data This command returns the current data values in the D record format see below Command RRD Response D Record see Data Reporting Records section in this Appendix Read Record Status This command returns the current status values in the S record format see below Command RRS Response S Record see Data Reporting Records section in this Appendix Model 3786 Ultrafine Water based Condensation Particle Counter RTO RV Read Time On This command reports the instruments power on time Command RTO Read on time command Response hhhh mm hhhh number of on time hours mm number of on time minutes Example RTO Read power on time Response 456 40 456 hours and 40 minutes Read Version This command returns the instruments Model number firmware revision and its serial number Command RV Read Version command Response Model 3876 Ver v vv S N nnnn v vv ranges 0 01 to 9 99 3 digits nnnn ranges 100 to 99999999 Example RV Read Version Response Model 3876 Ver 2 01 S N 12453348 Firmware Commands B 3 Set Commands These commands are used to set instrument parameters
2. Particle Counter mece 3786 PN Ne 3 PARTOLE stans nor uve v J e omar romam mae onanera Figure 1 1 Model 3786 Ultrafine Water based Condensation Particle Counter UWCPC Acknowledgement 1 2 The continuous laminar flow water based condensation principle on which this product is based is patented technology licensed from Aerosol Dynamics Inc of Berkeley CA We give our sincere thanks to Susanne V Hering PhD and Mark R Stolzenburg PhD for their invention their clever insights to this unique technology their numerical models and the gracious feedback they have provided during the development of this product 1 U S Patent 6712881 Model 3786 Ultrafine Water based Condensation Particle Counter How it Works The Model 3786 UWCPC is a water based Condensation Particle Counter designed to measure the concentration of airborne ultrafine particles In operation the UWCPC draws in an air sample and counts the number of particles in that sample to provide a particle concentration value that is displayed as the number of particles detected per cubic centimeter of sampled air The UWCPC uses a laser and optical detector to detect the particles passing the sampled flow through a viewing volume illuminated by a laser The instrument relies on a condensation technique to deposit a working fluid on the particle to grow or amplify their size to a value that can be detected readily with a conventional optical sy
3. This is typically not a problem as the Internal Com is not used unless a user initiated program is running on the PC 104 SBC UWCPC responses to commands received on the Internal Com are returned on the Internal Com and commands received from the Serial or USB interfaces are returned on BOTH of these interfaces Model 3786 Ultrafine Water based Condensation Particle Counter On power up the UWCPC is setup to send a data record to the Serial interface once every six seconds The USB link light will flash whenever data is transmitted by the UWCPC to the Serial or USB interfaces When the USB interface is connected to a host device the link light will turn on and momentarily blink off when data is transmitted USB Driver Sofiware USB drivers software must be installed on the host computer For Windows operating systems the drivers may be downloaded from the USB chip manufacturers site at www ftdichip com FTDrivers htm or are available from Windows Update Perform the following steps to install the Windows USB driver 1 Download the driver FT232BM VCP 2 Extract unzip the driver into a blank folder 3 Connect the computer to the UWCPC USB port 4 Follow the Add New Hardware Wizard steps and browse to the folder containing the extracted driver 5 Ifthe Wizard does not start use the Add Hardware function from the Control Panel USB device drivers for the Linux Kernel 2 4 0 and greater are bui
4. components when indicated in specifications are warranted for 90 days from the date of shipment b 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 c Seller does not provide any warranty on finished goods manufactured by others or on any fuses batteries or other consumable materials Only the original manufacturer s warranty applies d Unless specifically authorized in a separate writing by Seller Seller makes no warranty with respect to and shall have no liability in connection with goods which are incorporated into other products or equipment or which are modified by any person other than Seller The foregoing is IN LIEU OF all other warranties and is subject to the LIMITATIONS stated herein NO OTHER EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR PARTICULAR PURPOSE OR MERCHANTABILITY IS MADE TO THE EXTENT PERMITTED BY LAW THE EXCLUSIVE REMEDY OF THE USER OR BUYER AND THE LIMIT OF SELLER S LIABILITY FOR ANY AND ALL LOSSES INJURIES OR DAMAGES CONCERNING THE GOODS INCLUDING CLAIMS BASED ON CONTRACT NEGLIGENCE TORT STRICT LIABILITY OR OTHERWISE SHALL BE THE RETURN OF GOODS TO SELLER AND THE REFUND OF THE PURCHASE PRICE OR AT THE OPTION OF SELLER THE REPAIR OR REPLACEMENT OF THE GOODS IN NO EVENT SHALL SELLER BE LIABLE FOR ANY SPECIAL CONSEQUENTIAL OR INCIDENTAL DAMAGES SELLER SHALL NOT BE
5. AP GT OT CT S Status Record Identifier FL Aerosol flow rate in cm min AP Absolute Pressure in millibar ST Saturator Temperature in degrees Celsius GT Growth tube Temperature in degrees Celsius OT Optics Temperature in degrees Celsius Example S Record S 300 970 12 0 75 0 75 0 Z Record scanning data Z Mode Flags RN NO N1 N9 Z Record Identifier Mode Current Operating mode 5 or 6 Flags See status flags RN Record number 1 to 600 Nx Equivalent number of particles counted in tenth second 0 to 99999999 based on live corrected counts or the photometric value Example Z record Z 5 0 12 0 0 0 12 182 518 641 896 887 871 A Record raw analog diagnostic only A a b c d e f g h i j k l m n o A Record Identifier a o raw analog values bits Example A record A 2382 3194 1 1108 4095 4095 2735 1284 518 641 896 2278 821 819 1958 C Record flow and temperature control diagnostic only C a b c d e f g h i j k C Record Identifier a control bit values Example C record C 2413 2422 2166 2276 2276 1468 821 820 2894 821 820 1011 2210 2222 2012 Firmware Commands B 17 Index A absolute pressure operating range A 1 address TSI iii aerosol flow rate A 1 Aerosol Instrument Manager software manual xiii aerosol medium A 1 aerosol source connecting 2 5 air flow system 3 5 analog output A 1 attaching water source 2 3 auxiliary single board computer A 1 back panel connections A 2 bar graph scre
6. Connections Pin Number Signal Direction 2 RXD INPUT TO UWCPC 3 TXD OUTPUT FROM UWCPC 5 GND When the PC 104 SBC is installed there is an internal connection between the UWCPC and the PC 104 SBC If the UWCPC is purchased without the optional PC 104 SBC the associated connectors have no internal connections to the UWCPC 4 1 4 2 The Serial and USB data interfaces share a common communications channel to the UWCPC microcontroller Figure 4 1 provides a diagram of the data communications paths within the UWCPC Data input to the UWCPC from the Serial interface is exclusive from input via the USB interface Communications can be received from the Serial interface until a connection is linked to the USB Port Once this link is established USB link light is on communications can be received via the USB Port but not from the Serial port When the USB link is terminated disconnected the Serial port can be again used to provide input to the UWCPC UWCPC Communications Diagram MAIN PC BOARD PC 104 MICRO CONTROLLER ETHERNET DIGITAL SWITCH Figure 4 1 UWCPC Data Communications Diagram The UWCPC can receive serial data commands from the Internal Com and from either the Serial or the USB Port but not both The UWCPC uses a single receive buffer for communications so care must be taken to ensure that commands are not sent simultaneously causing the data to be jumbled
7. SIT xxxx Response OK Example SIT 12 OK SIT 12 Set Laser Set Injection Time command xxxx ranges 0 to 3600 seconds Command sets injection interval to 12 seconds Response Command to read back the current setting Response The set laser command switches the laser on or off The laser is always in the on condition when the instrument is first powered up Command SL x Response OK Example SL 0 OK SL 0 Set Live time Minimum Command to set laser on or off x 0 turns laser off x 1 turns laser on Command turns laser off Response Command to read back the current setting Response indicates laser is off This command sets minimum amount of live time in proportion to elapse time allowed before the OVER annotation is shown on the primary display The factory default value is 400 which represents 40 Command SLM xxx Response oK Example SLM 400 OK SLM 400 Command to set live time minimum xxx 0 to 1001 Response Command to set live time minimum to 40 Response Command to read back the current setting Response Firmware Commands B 9 B 10 SLS SM Set Laser Set Point This command is used to set the laser power Use of this command may damage or destroy the laser diode Command SLS x Command to set laser control set point x 0 to 4095 Response OK Response Example SLS 600 Command to set laser control value to 600 OK Response SLS Command to read back the current la
8. be detected since particles are nearly continually in the measurement viewing volume and the accuracy of the live time measurement begins to diminish When the measured live time value drops below 40 of elapse real time the display will show an OVER annotation indicating that the measured concentration exceeds its specified operating range When the live time value drops below 10 of elapse time the display will show a concentration of 9 99E5 particles cm indicating an extreme overload condition During operation the UWCPC collects single particle counts and dead time corrected sample time every tenth of second The concentration value reported on the primary concentration display is updated each second It uses data collected over the previous second of elapsed time to calculate concentration If the concentration is less than 20 0 particles cm a six second running average of particle count data is used to calculate the displayed value A single particle counted during this six second sample is displayed as 0 03 particles cm which is the minimum value that can be displayed other than 0 00 without using the totalizer Concentration data is also available from the data communications ports and it is aggregated or summed from each tenth second measurement with programmable sample periods from 0 1 second to 3600 seconds Model 3786 Ultrafine Water based Condensation Particle Counter Packing List CHAPTER 2 Unpackin
9. correction B 5 particle size range A 1 set detector offset B 6 PC 104 single board 4 5 set detector threshold B 6 photometric reading 5 6 set drain mode B 5 power set dryer B 4 connecting 2 4 set flow set point B 7 power requirements A 2 set flow zero B 7 primary concentration screen 3 1 set growth heater B 7 priming instrument 2 4 set growth tube temperature set point B 8 product set injection prime B 8 literature xiii set injection time B 9 overview 1 1 set laser B 9 1 2 Model 3786 Ultrafine Water based Condensation Particle Counter set commands continued set laser set point B 10 set live time minimum B 9 set mode B 10 set optics heater B 12 set optics temperature set point B 12 set saturator controller B 13 set saturator temperature set point B 13 set sheath flow set point B 8 setup 2 1 sheath flow rate A 1 shipping 2 6 specifications A 1 status indicator rapidly flashing 5 7 status indicator light 3 4 status screen 3 2 storage 2 6 T technical contacts 5 7 Tera Term 4 4 terminal communications 4 4 totalizer 3 3 transporting UWCPC 2 5 troubleshooting 5 1 5 3 TSI address iii U V unpacking 2 1 2 2 USB driver software 4 3 UWCPC see Model 3786 W warning symbols vi water in sample inlet 5 4 water system 3 6 weight A 2 wick installation 2 3 location 2 3 removing 2 8 replacing 5 1 X Y Z xminicom 4 4 Index Reader s Comments Please help
10. of the sample 10 Reserved 20 A drain cycle was in process during the sample or the reservoir was detected full 40 Set if dry wick was detected during the sample 80 Set if reservoir full for ten minutes and water injection has stopped 100 Saturator Growth Tube or Optics temperatures were out of range during the sample 200 The laser power was out of range for some portion of the sample 400 UWCPC in warm up period 1000 Set during front porch period of a scanning sample 2000 Set during the back porch period of a scanning sample Aggregated Concentration This concentration value is calculated by dividing the accumulated aggregate counts by the live time of the sample 5 0 The aggregated counts and live times are accumulated each tenth second interval If the live time value for the interval is less than 10 the aggregated counts are calculated based on the overflow concentration of 9 99e5 Otherwise the aggregated counts accumulated are the total counts detected during the interval and live time is the live time value for the interval The overflow flag will be set when the concentration value exceeds 9 99e5 Sample time elapse time 0 1 second resolution 0 1 to 3600 Live time 0 1 second resolution 0 1 3600 Accumulated particle counts Place holder always 0 Raw Photometric value Model 3786 Ultrafine Water based Condensation Particle Counter Example D Record D 2 0 2 27e3 6 0 5 875 66784 0 308 S Record status S FL
11. second time will stop the counter and the timer holding the current count time totals and the calculated concentration Pressing the button a third time will clear the Totalizer preparing it for a new sample Subsequent presses of the Totalizer button will repeat the Run Stop and Reset sequence 2 59 cm 454 particles 35 0 seconds The totalizer function is intended for low concentration measurements and will display Over if the concentration exceeds 2000 particles cm No live time correction is used in the accumulation of time The Totalizer will stop automatically when the maximum time of 3600 seconds is reached Eight digits of particle counts can be displayed The displayed concentration range is from 0 0000 to 1000 particles cm The concentration displayed on this screen differs from the value shown on the Primary Concentration display because it is calculated solely on particles counted and elapse time of the totalizer sample Instrument Operation 3 3 Status Indicator Lights 3 4 Four lights above the display provide a quick indication of the UWCPC s current operating status Particle The particle light is flashed for each particle detected At particle concentrations in excess of about 5 0 cm the flashes turn to a continuous glow Status A steady glow of the status light indicates that the instrument has warmed to its operating temperatures and the laser is running at its normal oper
12. should you need to return the instrument to TSI for service If anything is missing or appears to be damaged contact your TSI representative or contact TSI Customer Service at 1 800 861 7919 USA or 001 651 490 3838 For Technical Support call 1 800 861 7032 USA or 001 651 765 3797 Chapter 5 includes instructions on returning the UWCPC to TSI Incorporated Important This instrument operates using water as a working fluid The instrument can tolerate tipping of up to ten degrees during normal operation Perform the procedures outlined in the Transporting section before moving or shipping the instrument Examples of improper handling include e Shipping an undried instrument e Transporting an undrained instrument e Excessive tipping beyond ten degrees of an undrained instrument e Subjecting an undried instrument to freezing temperatures Any of the above actions can result in the flooding of the optical system performance degradation and possible damage to the instrument Such neglect is not covered under the manufacturer s warranty Perform the following steps to set up a new UWCPC or a unit that has been dried for shipment or storage 1 Remove any protective cap on the Sample Inlet Model 3786 Ultrafine Water based Condensation Particle Counter 2 Install the growth tube wick The UWCPC is shipped from the factory with the growth tube wick installed The followi
13. 6 actual value of purge flow rate does not impact the aerosol flow rate During operation the porous media inside the UWCPC requires a continuous input of water Excess water exits the media and is collected in a reservoir along with water recovered from the vapor in the sample stream The UWCPC has several available options on how the water is sourced and how excess water in the reservoir is drained All source water initially comes from the connected Fill Bottle located in the bracket on the back of the instrument After the instrument is primed the source of water can continue to come completely from the source bottle or can be recycled from recovered water from the reservoir By using the recycle option the length of time that the UWCPC can be operated without refilling the Fill Bottle is extended from about a day to over eight days Also since the recycled water comes from the reservoir it will only need draining about once a week instead of once a day for the non recycling mode During the recycling mode approximately 20 of the water is always taken from the Fill Bottle to ensure that there is always water present in the reservoir Regardless of the source mode the reservoir will eventually fill and require draining When the reservoir fills a level detector senses the condition which will be indicated with the Liquid status light and on the Status Screen on the display If the full condition persists for more than ten minutes th
14. Contents xi About This Manual Purpose This is a user manual for the Model 3786 Ultrafine Water based Condensation Particle Counter UWCPC Related Product Literature The following TSI product manuals may be of interest Copies of these may be viewed on the TSI website www tsi com Model 3007 Condensation Particle Counter Operation and Service Manual part number 1930035 TSI Incorporated Model 3010 Condensation Particle Counter Instruction Manual part number 1933010 TSI Incorporated Model 3022A Condensation Particle Counter Instruction Manual part number 1933763 TSI Incorporated Model 3025A Ultrafine Condensation Particle Counter Instruction Manual part number 1933762 TSI Incorporated Model 3760A 3762 Condensation Particle Counter Instruction Manual part number 1933772 TSI Incorporated Model 3782 Water based Condensation Particle Counter Operation and Service Manual part number 1930073 TSI Incorporated Model 3785 Water based Condensation Particle Counter Operation and Service Manual part number 1933001 TSI Incorporated Aerosol Instrument Manager Software for CPC and EAD Instruction Manual part number 1930062 TSI Incorporated This manual contains operating instructions for Aerosol Instrument Manager Software for CPC and EAD a software program that monitors calculates and displays particle data collected by a CPC xiii Submitting Comments TSI values your comments and suggestions on th
15. PRODUCT Slee Tat MANDA OUTPUT CLASS 1 LASER PRODUCT THIS PRODUCT IS IN COMPLETE COMPLIANCE WITH 21 CFR 104010 AND 10401 CAUTION ONLY QUALIFIED PERSONNEL MAY SERVICE THIS INSTRUMENT vii Chapters Contents Manual History e eeta na eaaa en een are ii Warranty apao ea aa ena iw nee Mega ne eh eee iii Safety lan ns E sa v Description of Caution Symbol esesessessrresreerererrresrererererereree v Cahon NN v Warning a bn v Caution or Warning Symbols u ssssssssenssenenensnen nennen vi O vii About This Manwal nn a een xiii PUTPOSC nenne me xiii Related Product Literature rondan k ge a a a E xiii Submitting Comments snene aene E xiv 1 Product Overview cto 1 1 Product DESCTIPUON nina eh eb 1 1 Acknowlegement nn A a dada 1 2 How it WOKS nr ee ee nen er nee 1 3 Concentration Calculations 444H4snnnnnennen nennen nn 1 5 2 Unpacking and Setting Up the UWCPC 2 1 Packing List een seen 2 1 Unpaid ihn 2 2 Setting Up en ans eves dese d ends adobe 2 2 Transporting ii a aa 2 5 Lo al Transporting ini asien nn 2 5 Shipping and Storage eieren oie er aa Eiana uuaa ST 2 6 3 Instrument Operation ooocooccoccnccnccnnconcnnconcnncnnnconcnncnnanncos 3 1 THE Displays see essen nee gr 3 1 Primary Concentration Screen ersensensennensennennsenseneennensnnnn 3 1 Bar Graph CTO tt nen as 3 2 SALUT ainia 3 2 Totalzer yasni nn gi aS 3 3 Status Indicator Light
16. Particle Instruments Model 3786 Ultrafine Water based Condensation Particle Counter Operation and Service Manual P N 1930072 Revision B April 2005 A Product Overview TSI Unpacking and Setting Up the Model 3786 UWCPC Ultrafine Water based Instrument Condensation Particle Counter Operation Data Collection Operation and Service Manual Maintenance and Troubleshooting Appendixes and Index Manual History The following is a history of the Model 3786 Ultrafine Water based Condensation Particle Counter UWCPC Operation and Service Manual P N 1930072 Revision Date A January 2005 B April 2005 Part Number Copyright Address Fax No E mail Address Limitation of Warranty and Liability effective March 2003 Service Policy 1930072 Revision B April 2005 OTSI Incorporated 2005 All rights reserved TSI Incorporated 500 Cardigan Road Shoreview MN 55126 USA 651 490 3824 particleOtsi com Seller warrants the goods sold hereunder under normal use and service as described in the operator s manual shall be free from defects in workmanship and material for twelve 12 months or the length of time specified in the operator s manual from the date of shipment to the customer This warranty period is inclusive of any statutory warranty This limited warranty is subject to the following exclusions a Hot wire or hot film sensors used with research anemometers and certain other
17. RESPONSIBLE FOR INSTALLATION DISMANTLING OR REINSTALLATION COSTS OR CHARGES No Action regardless of form may be brought against Seller more than 12 months after a cause of action has accrued The goods returned under warranty to Seller s factory shall be at Buyer s risk of loss and will be returned if at all at Seller s risk of loss Buyer and all users are deemed to have accepted this LIMITATION OF WARRANTY AND LIABILITY which contains the complete and exclusive limited warranty of Seller This LIMITATION OF WARRANTY AND LIABILITY may not be amended modified or its terms waived except by writing signed by an Officer of Seller Knowing that inoperative or defective instruments are as detrimental to TSI as they are to our customers our service policy is designed to give prompt attention to any problems If any malfunction is discovered please contact your nearest sales office or representative or call TSI Customer Service at 1 800 861 7919 USA or 651 490 3838 For Technical Support call 1 800 861 7032 USA or 651 765 3797 Safety This section provides instructions to ensure safe and proper handling of the Model 3786 Ultrafine Water based Condensation Particle Counter UWCPC There are no user serviceable parts inside the instrument Refer all repair and maintenance to a qualified technician All maintenance and repair information in this manual is included for use by a qualified technician Take the following precautions
18. When issued with a parameter this command uses that parameter as a control point with which to control pump The differential orifice pressure is compared to the control point and adjustments are made to the pump drive to maintain a match between the two The actual control point is compensated by the current value of the Absolute Pressure sensor to compensate for inlet pressure Command SHS xxxx Command to set flow control set point x 0 to 4095 Response OK Example SHS 2990 Command to set current flow control values OK Response SHS Command to read back the current settings 2990 Response provides set point Set Injection Prime This command initiates a sequence to prime the instrument with injections of water The supplied parameter indicates the number of injections to perform Injections are performed at the rate of one every half second until all the injections are completed Providing the SIP command with no parameter or with a parameter of O will halt the injection sequence See also the SIT command Command SIP xxx Set Injection Prime command xxx ranges 0 to 500 Response OK Example SIP 50 Command initials 50 water injections OK Response SIP Command cancels the injection sequence OK Response Model 3786 Ultrafine Water based Condensation Particle Counter SIT SL SLM Set Injection Time This command sets the water injection rate in seconds between injections The factory default setting is 12 seconds Command
19. actor Set Dryer on off Set Dead time Correction value Set Drain Mode Set Detector Offset Set Detector Threshold Set Flow Set point Set Flow Zero value Set Growth heater on off Set Growth tube temperature Set point Set sHeath flow Set point Set Injection Prime Set Injection Time interval Set Laser on off Set Live time Minimum value Set Laser Set point Set Mode x mode t sample time Set Optics heater on off Set Optics temperature Set point Set Pump on off Set Saturator temperature controller on off Set Saturator temperature Set point Set analog Voltage output Set analog Voltage Span value Set analog Voltage Zero value Set auto Zero function B 1 Read Commands B 2 RD RL RRA RRC RRD RRS Read Display Concentration This command returns the primary concentration display value Command RD Response c c One second display concentration value Example RD Read Display Concentration 6 34E4 Concentration value in paricles cm Read Laser This command returns the current laser power in percent of the laser setting and the laser current in milliamps Command RL Response p c p laser power in percent 0 to 150 c laser current in milliamps 0 to 300 Example RL Read Laser command 97 45 Laser Power at 97 laser current at 45 milliamps Read Record Analog This command returns the current raw analog values in the A record format see below This command is intended for diagnostic use only
20. annels the Serial USB source and the Internal Com between the microcontroller and the SBC Commands received and executed on one Channel are responded to on that same channel Likewise the data records reported as the result of an SM firmware command are returned on whatever channel that instigated it Data Collection 4 7 CHAPTER 5 Maintenance and Troubleshooting This chapter provides maintenance and troubleshooting information for the Model 3786 Ultrafine Water based Condensation Particle Counter UWCPC Replacing Wick It is recommended that a new wick be installed in the UWCPC a minimum of every six months Refer to Chapter 2 Unpacking and Setting Up the UWCPC for steps involved in removing the old wick Once the inlet assembly has been removed simply slip off the old wick from the assembly and slide on the new one Reinstall the inlet assembly and tighten the thumbscrews Once the unit is returned to service prime the new wick with 5 cc water 100 injections When replacing the wick it is a good time to also clean any accumulated material from the drain reservoir See the section on drying the UWCPC in Chapter 2 Unpacking and Setting Up the UWCPC for instructions on removing the reservoir cover from the bottom of the instrument Wipe out any residue from the reservoir with a wet cloth Reinstall the reservoir cover making sure the O rings are properly seated Flow Calibration The inlet and sheath flows of
21. ating power A slow blinking of the light 1 second is displayed when the operating temperatures are not within normal operating values The indicator blinks fast 3 sec when the internal laser is either turned off or otherwise not able to operate at its required power output setting Flow The flow indicator displays a steady glow when the current aerosol flow rate is within ten percent of its nominal value of 300 cm minute The light will rapidly flash when the flow exceeds 110 of its nominal flow and it will flash slowly if the flow rate drops below 90 The light will be turned off if the pump is switched off Liquid The liquid indicator will be lit during normal operation when the drain reservoir is not full and the growth tube is not dry The indicator will flash slowly when the drain reservoir is full and will be turned off if the full drain condition persists for more than ten minutes at which time water injection will cease see Water Handling The indicator will flash rapidly if a dry growth tube wick is detected Model 3786 Ultrafine Water based Condensation Particle Counter Table 3 1 Front Panel Indicator Conditions Indicator Particle Status Flow Liquid Drain reservoir full No particles Instrument off Pump off and water injections stopped Particles Instrument not Drain Slow Flashing at operating Low flow rate y detected temperatures reservoir full j Laser off or not Fast Flashing Particles at requi
22. ct Overview 1 3 1 4 OPTICAL PARTICLE DETECTOR FLOW ORIFICE POROUS MEDIA SATURATOR AEROSOL INLET Figure 1 2 UWCPC Flow Diagram Model 3786 Ultrafine Water based Condensation Particle Counter PUMP EXHAUST DRAIN BOTTLE Concentration Calculations The UWCPC can report particle concentration values in three different ways These are the primary concentration display the totalizer display and the concentration values reported using the data communications ports In operation the UWCPC internally measures two parameters related to the particle concentration These are the number of particle pulses counted and the sample time Another important parameter relating to concentration is the aerosol flow rate which is always assumed to be 0 3 L min The flow rate is actually the difference between the total or inlet flow rate which is 0 6 L min and the sheath flow rate of 0 3 L min The basic calculation for the number of particles per volume of air is Np TXQ C is the particle concentration in particles cm N is the number of particles counted T is the sample time Q is the aerosol flow rate in cm second The Totalizer uses the elapse time for the sample time in the above calculation to provide a useful way to acquire low particle concentration information on the display The number of particles in the measured sample is one of the limiting factors of how low a particle concentration can be precisely
23. data collection modes and water handling modes When set commands are issued without a parameter the return response is the current setting of the parameter or mode The Set commands will cause interruptions in data reporting so execution of these commands during the data collection process is not recommended The primary Set command intended for user control of data collection is SM Set Mode command The use of Set commands other than the SM can adversely affect the calibration of the instrument and possible damage Use extreme care when executing Set commands SAS Set Absolute Pressure Scale Factor This command is used to calibrate the absolute pressure sensor The supplied parameter is stored internally as a gain factor The nominal value for the parameter is 1000 Command SAS x Response oK Example SAS 1020 OK SAS 1020 SD Set Dryer Set Absolute pressure sensor scale factor 500 to 1500 Command Response Command Response echoing current value of 40 millivolts This command allows the dryer to be turned on or off The dryer is on by default upon power up Command SD x Response oK Example SD 0 OK SD 0 Command to set dryer on or off x 0 turns dryer off x 1 turns dryer on Response Command turns dryer off Response Command to read back the current setting Response indicates dryer is off B 4 Model 3786 Ultrafine Water based Condensation Particle Counter SDC SDM Set Dead time Corr
24. data is reported and if in a continuous mode the data is cleared internally and the next sample is started Command SM n ttt Command to set data collection mode n mode ranging 0 4 7 8 ttt sample interval in tenths of a second 1 to 36000 Response oK Response Examples SM 2 60 Command to set data continuous data collection with a six second sample time D records reported at end of each interval oK Response six seconds pass D record reported see D record in Data Reporting Records section in this Appendix SM Command to read back the current setting 2 60 Response mode 2 and a 6 second sample time For scanning modes 5 and 6 four additional parameters are included These are a starting voltage V in microvolts 1000 to 10 000 000 a scanning constant number 1 in milliseconds 100 to 1 000 000 a front porch time in seconds 0 to 600 and a back porch time in seconds 0 to 600 The scanning mode provides a ramped analog output voltage in synchronous with particle data collection During a scanning sample Z records are reported every second that includes ten particle count values for each tenth second interval during the one second record The analog output voltage during scanning mode operation ramps according to t V t T Vin where Vw Starting voltage in volts t time into the scanning ramp in seconds t Scanning constant in seconds The voltage values during the front and back porch time periods a
25. determined The formula for this statistical precision is N Oy X100 N where 0 is the relative standard deviation in percent N isthe number of particle counts in the sample For a sample of 10 000 particles the statistical precision is 1 which is much better than the accuracy of the instrument At 100 particles the statistical uncertainty increases to 10 and becomes a significant factor in determining the aerosol concentration The Product Overview 1 5 1 6 Totalizer allows for increased statistical precision at low particle concentrations through the use of longer sample times When a particle enters the optical viewing volume and is being detected no other particles can be counted As the particle concentration increases the amount of time blocked by the presence of particles becomes significant If the particle concentration were computed using elapsed time the value would be under reported The actual sample time needs to be corrected for this blocked or dead time To adjust for this particle coincidence effect the UWCPC measures the dead time resulting from the presence of particles in the viewing volume and subtracts it from the sample time This sample live time value is used in place of the sample time for the concentration calculations for the primary display when not using the totalizer At very high concentrations the dead time value grows and the adjustment becomes large Single particle events may not even
26. e Do not remove any parts from the instrument unless you are specifically told to do so in this manual e Do not remove the instrument housing or covers while power is supplied to the instrument Description of Caution Symbol The following symbol and an appropriate caution statement are used throughout the manual and on the UWCPC to draw attention to any steps that require cautionary measures when working with the Model 3786 Caution Caution means be careful lt means if you do not follow the procedures prescribed in this manual you may do something that might result in equipment damage lt also indicates that important information about the operation and maintenance of this instrument is included Warning Warning means that unsafe use of the instrument could result in serious injury to you or cause irrevocable damage to the instrument Follow the procedures prescribed in this manual to use the instrument safely vi Caution or Warning Symbols The following symbols may accompany cautions and warnings to indicate the nature and consequences of hazards Warns you that uninsulated voltage within the instrument may have sufficient magnitude to cause electric shock Therefore itis dangerous to make contact with any part inside the instrument Warns of hazardous laser radiation if the optical LASER RADIATION assembly is opened and the instrument is WHEN OPE A 7 euss usenmowwer powered The optical assembly is
27. e instrument will stop sourcing water to avoid flooding the instrument sample flow path The instrument will remain in this shutdown condition until the reservoir is drained There are three drain modes Manual Automatic and Continuous which are provided to handle removal of excess water from the reservoir The recycle mode along with the drain modes can be selected through the Drain Prime button on the front panel of the WCPC as described in the Drain Modes section Model 3786 Ultrafine Water based Condensation Particle Counter Drain Modes At any time during operation a drain cycle can be initiated manually by pressing the Drain Prime button on the front panel and then pressing it a second time and holding it for at least one second During a drain cycle the pump will be turned off and a drain valve will be opened allowing the reservoir to be drained The cycle duration is one minute but it can be terminated early by pressing the Display button on the front panel The Drain connector on the back panel is closed if disconnected This avoids spillage of water but it will also keep the reservoir from draining if nothing is connected to the Drain connector To select the recycle mode and the drain modes press the Drain Prime button to access the Drain Prime menu Press the button two more times to select the Set Drain Mode option Press and hold the button for at least a second to access the Set Drain Mode menu One of four drain mod
28. eased A typical symptom of water in the optical system flooded optics is a very high photometric baseline value High background light can be confirmed by turning off the laser and observing the resulting baseline value The laser can be turned off using a computer connected to the UWCPC that is running a terminal emulation program The command SL O will Set Laser to off and a SL 1 command will turn the laser on Powering up the instrument will also turn on the laser When the laser is turned off there is no background light so if the baseline photometric value returns to a normal range it is likely that water or other contaminates are present in the optical system Apply the following steps as the first approach to drying a flooded optical system 1 Drain the UWCPC reservoir Remove the wick Disconnect the fill bottle Disconnect any sample source from the sample inlet e ID Operate unit with pump on in a dry environment for at least 10 hours Drying the optics should return the baseline photometric value to its normal range Flooding of the optical system will likely leave residues on the optical surfaces which may affect the photometric calibration Reinstall the wick connect the Fill Bottle and reprime the unit with water before returning it to operation For cleaning and recalibration contact TSI and arrange for factory service 5 6 Model 3786 Ultrafine Water based Condensation Particle Counter Rapidly Flashing Stat
29. ection This command controls the amount of correction that is applied to the instrument s measured dead time The UWCPC measures the dead time by measuring the time a particle signal exceeds a preset threshold This value is slightly under reported since the particle signal is of Gaussian shape and the digitized threshold value is less than the time to which the next particle could actually be detected The actual dead time value used in the UWCPC is the measured dead time value multiplied by this factor in percent Command SDC x Command to set dead time correction x 0 to 200 in units of percentage Response OK Example SDC 110 Command sets dead time correction to 110 OK Response spc Command 110 Response Set Drain Mode This command sets the reservoir drain recycling mode of the instrument There are 5 drain modes which are described as follows Mode Description Oor 1 Manual Drain Setting the drain mode to 1 will initiate a drain cycle Once the one minute cycle is complete the drain mode will automatically be switched back to the previous setting Setting the drain mode to O will cancel any current drain cycle In this mode the reservoir can be drained when initiated by the front panel drain button or setting the drain mode to a non zero value 2 Recycle Mode Setting the drain mode to 2 allows the WCPC to recycle water from the reservoir back into the WCPC When the reservoir is full the drain flag will be set along with a fr
30. en 3 2 C calibration interval A 2 caution symbols vi Class 1 laser vi commands firmware B 1 comments submitting xiv communications A 1 communications parameters 4 4 concentration calculations 1 5 condensing liquid A 1 connecting power 2 4 copyright iii D data collection 4 1 data communications diagram 4 2 data reporting records B 16 A record B 17 C record B 17 D record B 16 S record B 17 Z record B 17 dimensions A 2 display 3 1 A 2 drain bottle connecting 2 6 drain cycle troubleshooting 5 4 drain modes 3 7 drain UWCPC 2 7 drain prime button 2 4 2 7 draining reservoir 2 8 E environmental conditions A 2 F false background counts A 1 fax number iii fill bottle connection 2 4 firmware commands B 1 quick reference B 1 flow A 1 flow calibration 5 1 flow control A 1 flow indicator light 3 4 flow source A 1 front panel A 2 front panel indicator conditions 3 5 G growth tube wick 2 3 H high photometric reading 5 6 history manual ii HyperTerminal 4 4 I J K important 2 2 inlet pressure A 1 installation of wick 2 3 installing growth tube wick 2 3 instrument priming 2 4 L labels vii LED indicator A 2 light source A 1 Linux 4 4 liquid indicator light 3 4 literature manuals xiii location of purge flow line 5 2 location of wick 2 3 low photometric reading 5 6 M N O pump exhaust troubleshooting 5 5 main
31. en the instrument has been warmed up and running for at least 15 minutes Also the instrument must be fully primed to ensure the internal water trap is filled Remember to reconnect the sheath flow back to the tube connecting it to the UWCPC engine assembly High voltage is accessible in several locations within this instrument j Purge y ios T 2 Flow Line Sheath gt yellow wie oe U green Figure 5 1 Location of Sheath and Purge Flow Lines Model 3786 Ultrafine Water based Condensation Particle Counter To change the flow calibration the internally stored calibration set point must be changed A computer running a terminal emulation program as described in Chapter 4 must be connected to the UWCPC Entering the command SFS Set Flow Set Point will echo the current set point value to the terminal screen The flow set point value can be changed by entering a new value using the same command followed by a comma and the value Increasing the set point value will increase the flow Changes to the value of 10 or more may be necessary to see changes in the flow meter reading depending on its sensitivity The sheath flow calibration set point value can be queried and changed in a like manner using the SHS Set sHeath Set point command For example Command Response SFS 1250 UWCPC returns current flow set point value SFS 1260 OK UWCPC accepts new set point and increases flow rate SFS 1260 UWCPC returns new
32. es can be selected through this menu Recycle Manual Recycle Auto Drain Auto Drain and Continuous Drain These modes can also be selected through firmware commands In Manual drain mode the UWCPC will only perform a drain cycle when initiated through the front panel Drain Prime menu or by command through a data port When operating in Automatic drain mode the UWCPC will begin a drain cycle when the level sensor detects that the reservoir is full During the Continuous drain mode the drain value is left open and water entering the reservoir immediately drains to the externally connected Drain bottle The Drain bottle must be tightly sealed and vented to the Vent connector on the back panel For all drain modes it is important that the air pressure at the Sample Inlet be equal or higher than the pressure at the drain bottle If the pressure at the Sample Inlet is lower than the drain bottle the reservoir will not drain into the bottle but can potentially flow up and out of the Sample Inlet The sample pump is turned off during the drain cycle to assist in ensuring that any pressure at the inlet is minimized In cases where the sample inlet pressure is reduced by external sources the second port on the Instrument Operation 3 7 drain bottle must be connected back to the Vent connector on the back panel Sample Inlet Connection 3 8 The Sample Inlet is located on the back of the UWCPC Turn off the pump before connecting or disc
33. f the display provides information about liquid handing The usual display is Liquid Norma indicating that the instrument has water and the drain reservoir is not full Other conditions reported on this status line are covered in the section on Water Handling Liquid Normal Optc 75 0 Photo 225 GT 75 0 Abs 983 Sat 12 0 Flow 300 The left column under the liquid status line provides the operating temperatures of the Optics Optc Growth Tube GT and the Saturator Sat The temperatures are reported in degrees Centigrade The value indicated next to the Photo label is the Model 3786 Ultrafine Water based Condensation Particle Counter Totalizer current raw photometric reading which is typically between 150 and 280 for when no particle are detected This value increases with particle concentration and provides an indication of the amount of light incident on the photo detector The label Abs refers to the absolute inlet pressure and is reported in millibar The final indicator labeled Flow provides the current aerosol flow rate measured by the instrument in units of cm minute This screen displays a running total of particle counts elapse time and calculated concentration Operation of the Totalizer is controlled using the Totalizer button Pressing the Totalizer button will start data collection Once started the Totalizer accumulates particle counts and elapsed time Pressing the button a
34. flow set point The set point value should be adjusted until a flow meter reading of 0 6 L min is obtained Troubleshooting This section provides information on troubleshooting the following e Water in the sample inlet e Little or no water flows during drain cycle e Water spurts out of pump exhaust e High or low photometric readings e Rapidly flashing status indicator laser Maintenance and Troubleshooting 5 3 Water in the Sample Inlet 5 4 Water flowing out of the sample inlet or gurgling inside the inlet may result from several situations including e Tipping of the UWCPC beyond ten degrees e Awarm humid aerosol sample is condensing within the cooled inlet e The drain reservoir is overfilled Water in the inlet can be cleared by removing the inlet assembly slipping off the wick and drying the sample path with a cotton swab The reservoir should be drained Some inlet conditioning should be provided to lower the dew point of the aerosol sample if the cause of water in the inlet is due to condensation Little or No Water Flows During Drain Cycle The lack of water flow from the drain port during a drain cycle is an indication that some reduced pressure exists on the sample inlet or little or no water is in the reservoir Water in the drain tube connecting the UWCPC to the drain bottle can also impede draining The Drain bottle must be positioned below the instrument level to allow proper draining Rem
35. g and Setting Up the UWCPC Use the information in this chapter to unpack your Model 3786 Ultrafine Water based Condensation Particle Counter UWCPC and set it up Table 2 1 lists the components shipped with the UWCPC Table 2 1 Components of the Ultrafine Water based Condensation Particle Counter Qty Description Part Number 1 Ultrafine Water based Condensation Particle 3786 or Counter 3786 PC 1 Model 3786 Accessory Kit with the following parts 1 UWCPC Wick 1608070 1 Model 3786 UWCPC Operation and Service 1930072 Manual 1 Serial Cable RS 232 9 pin M F 962002 1 USB Cable I O A B 1303740 1 Fill Bottle Assembly 1210365 1 Drain Bottle Assembly 1210366 2 Drain Vent Tubes with Mating Connectors N A 1 Power Cord N A The 3786 PC is shipped with the PC 104 Single Board Computer installed in the UWCPC cabinet The UWCPC is shipped with a dry wick installed and one spare wick is included with the accessories Table 2 2 Replacement Parts for the Ultrafine Water based Condensation Particle Counter Qty Description Part Number 1 Drain Reservoir O Rings Small 2501161 1 Drain Reservoir O Rings Large 2501162 2 1 Unpacking Setting Up 2 2 Carefully unpack the Model 3786 Ultrafine Water based Condensation Particle Counter UWCPC from the shipping container Use the packing list Table 2 1 to make certain that there are no missing components Save your original packaging materials for future use
36. icle totalizer aerosol flow rate and operating parameters Particle Status Flow and Liquid Display Totalizer Pump Drain Prime Back Panel Connections PC 104 Ethernet Connector PC 104 Coml Connector USB connector Com Port connector Power Connector Water Source connector Vent connector normally closed Water Drain connector Pump Exhaust connector Aerosol Inlet Y4 OD SS tube Analog Output BNC Calibration Interval Recommended Annually Power requirements 100 230 VAC 50 60 Hz 125 VA Dimensions HWD 31 cm x 16 cm x 28 cm 12 in x 6 in x 11 in not including fill bottle or bracket Weight dry 5 5 kg 12 Ibs Environmental Conditions Indoor use Altitude Up to 3000 m 10 000 ft Ambient Temperature 10 to 35 C Ambient Humidity O to 90 RH non condensing Over voltage Category II Pollution Degree II Model 3786 Ultrafine Water based Condensation Particle Counter APPENDIX B Firmware Commands This appendix provides a quick reference and description of firmware commands Commands Quick Reference RD RL RRA RRC RRD RRS RTO RV SAS SD SDC SDM SDO SDT SFS SFZ SG SGS SHS SIP SIT SL SLM SLS SM x t SOS SP SS SSS SV SVS SVZ SZ Read Display concentration Read Laser Read Record raw Analog Read Record Control Read Record Data Read Record Status Read Time On Read Version Set Absolute pressure Scale f
37. in tenths of a degree Celsius This parameter is not stored and will revert to the default values on the next power up cycle The factory default setting of this value is 750 75 0 degrees C Command SOS xxx Command to set the optics temperature control set point xxx 0 to 800 Response OK Response Example sos 750 Command to set Growth Tube temperature to 75 0 deg OK Response sos Command to read back the current setting 750 Response indicates the set point value B 12 Model 3786 Ultrafine Water based Condensation Particle Counter SP ss SSS Set Pump The set pump command enables or disables the pump providing airflow through the instrument This action is the same as the action provided by the front panel Pump button Command SP x Command to set pump on or off x 0 turns pump off x 1 turns pump on Response OK Example SP 0 Command turns pump off OK Response SP Command to read back the current setting 0 Response indicates pump is off Set Saturator Controller The set saturator controller command switches the saturator temperature controller on or off The controller is always in the on condition when the instrument is first powered up Command SS x Command to set saturator controller on or off x O turns controller x 1 turns controller on Response oK Example ss 0 Command turns controller off oK Response ss Command to read back the current setting 0 Response indicates controller is off Set Sa
38. is manual Please use the comment sheet on the last page of this manual to send us your opinion on the manual s usability to suggest specific improvements or to report any technical errors If the comment sheet has already been used please mail fax or email your comments on another sheet of paper to TSI Incorporated 500 Cardigan Road Shoreview MN 55126 USA Fax 651 490 3824 Email particle tsi com xiv Model 3786 Ultrafine Water based Condensation Particle Counter CHAPTER 1 Product Overview This chapter contains an introduction to the Model 3786 Ultrafine Water based Condensation Particle Counter UWCPC and provides a brief explanation of how the system operates Product Description The Model 3786 UWCPC is a continuous sheathed laminar flow instrument using water as its working fluid The UWCPC provides rapid measurement of ultrafine particles in air Features include Uses water as a working fluid Detects particles down to 2 5 nm at a high aerosol flow rate of 0 3 L min Fast response to change in aerosol concentration T lt 2 seconds Sheath air flow design minimizes diffusion losses and produces a sharp lower cut point Single particle counting with continuous live time coincidence correction for maximum accuracy Display provides output of particle concentration total counts or plots of concentration vs time Built in Scanning Mobility Particle Sizer SMPS Spectrometer compatibility
39. lt in the O S kernel so no downloads are necessary Once the USB driver is loaded the operating systems recognizes the UWCPC as a new serial device In MS Windows this is a new port such as COM2 or COME It may not be obvious which Com Port the UWCPC is on and some trial and error selecting various ports may be necessary to identify the correct port Owindows is a registered trademark of Microsoft Corporation Data Collection 4 3 Communications Parameters All serial communications with the UWCPC are accomplished using the following communications parameters Baud Rate 115 200 Bits Character 8 Stop DIS ita 1 PATY een None All data communication is preformed through ASCII based character codes All multi field responses are comma separated values CSV All input commands and output responses are terminated with a carriage return CR All input Line feeds LF codes are ignored Terminal Communications Once the Serial or USB connection is made between the UWCPC and a host computer a terminal program may be used to communicate with the instrument Terminal emulation software that can be used includes e Tera Term a free software terminal emulator for MS Windows available at http hp vector co jp authors VA002416 teraterm html e HyperTerminal which is included with most MS Windows operating systems e The programs minicom and xminicom are included with most Linux distributio
40. n to the Ethernet port must be made with a shielded twisted pair 10 BaseT network cable The Ethernet configuration may be changed to provide a static IP address using the start up configuration routine provided The terminal emulation program minicom has been configured to use one of serial ports dev ttyS1 to communicate with the UWCPC through an internal connection This program may be used to test operation with the UWCPC and even to capture data It should be noted that the SBC is setup with a read only file system This ensures that when the UWCPC is turned off and the SBC is brought down hard the SBC will boot cleanly on the next power up This also means that for data to be saved to the SBC it must be either written to the var directory which is mounted read write in RAM or the file system must be mounted read write during the moments when data is to be written A demonstration program has been included named WCPCLog and is located in the directory home WCPC The program written in C initiates a SM 2 60 command captures the data D records returned by the UWCPC timestamps them stores them and creates a new data file each day A link to the home WCPC Model 3786 Ultrafine Water based Condensation Particle Counter directory is included in home www directory so files created by the program can be accessed via the internal web server The UWCPC can receive and send data from two different ch
41. nd SDT xxx Set Detector Threshold command xxx ranges 0 to 120 Response OK Example SDT 50 Command OK Response SDT Command 50 Response echoing current value of 40 millivolts Model 3786 Ultrafine Water based Condensation Particle Counter SFS SFZ SG Set Flow Set Point This command is used to set the inlet flow control set point which represents 0 6 L min aerosol flow for the flow control system When issued with a parameter this command uses that parameter as a control point with which to control pump The differential orifice pressure is compared to the control point and adjustments are made to the pump drive to maintain a match between the two The actual control point is compensated by the current value of the Absolute Pressure sensor to compensate for inlet pressure Command SFS xxxx Command to set flow control set point x 0 to 4095 Response OK Example SFS 2312 Command to set current flow control values OK Response SFS Command to read back the current settings 2312 Response provides set point Set Flow Zero This command is used to set the flow control zero value When issued with a parameter this command uses that parameter as the zero value for the flow system When issued without a parameter the command echoes the current flow zero value The flow zero value is normally set using the SZ command so this command is seldom needed to actually set the flow zero point value Command SFZ xxx Command to set flow ze
42. ng wick installation instructions only need to be followed if the wick is not already installed Loosen the two thumbscrews located at the Sample Inlet Remove Sample Inlet assembly c Slip growth tube wick over exit end of the Sample Inlet assembly d Slide growth tube wick into the UWCPC and press to seat the O ring seal e Tighten the thumbscrews securing the Sample Inlet assembly Figure 2 1 Location of UWCPC Wick on Sample Inlet Assembly Figure 2 2 Installation of UWCPC Wick on Sample Inlet Assembly 3 Attach the water source a Fill water source bottle with distilled water Tap water is not recommended b Place water source bottle into bottle bracket on the back of the UWCPC c Insert connector from the source bottle into the Fill connector on the back of the UWCPC Unpacking and Setting Up the UWCPC 2 3 2 4 Figure 2 3 Fill Bottle Connection 4 Connect the power a Attach power cord to the AC power inlet on the back of the UWCPC and to an AC power source Turn on the AC power switch located just over the power connector 5 Prime the instrument a Make sure the pump is off The pump can be turned off by pressing the Pump button Press the Drain Prime button on the UWCPC front panel Press the Drain Prime button a second time to select the Prime Growth Tube function Press and hold the Drain Prime button for at least one second to activate the water priming f
43. nnections to the Sample Inlet Turn on the UWCPC Drain the UWCPC a Connect a Drain bottle to the Drain connector on the back panel of the UWCPC Press the Drain Prime button on the front panel of the UWCPC to bring up the drain menu Press and hold the Drain Prime button to active the drain cycle Let the water drain from the reservoir for the one minute drain cycle Little or no water may drain if the reservoir is nearly empty Unpacking and Setting Up the UWCPC 2 5 2 6 d Remove the drain bottle connector e Switch off the instrument and remove the power cord 4 The UWCPC is ready for local transporting Figure 2 4 Drain Bottle Connection Shipping and Storage The following procedure must be used in cases where the UWCPC must be shipped stored or subjected to freezing temperatures The instrument must be dried using the following procedure 1 Disconnect any connections to the Sample Inlet 2 Remove the source water bottle and dry completely 3 Turn on the UWCPC and let it complete its warm up cycle Model 3786 Ultrafine Water based Condensation Particle Counter 4 Purge the UWCPC water source tubes Press the Drain Prime button on the UWCPC front panel Press the Drain Prime button a second time to select the Prime Growth Tube function Press and hold the Drain Prime button for at least one second to activate the water priming function Press the Drain Prime button several m
44. not user serviceable Indicates the connection is connected to earth ground and cabinet ground This device is a Class I laser product as defined by U S Department of Health and Human Services standards under the Radiation Control for Health and Safety Act of 1968 when operated according to the manufacturer s instruction A certification and identification label like the one shown below is presented on the back panel of each instrument CLASS 1 LASER PRODUCT THIS PRODUCT IS IN COMPLETE COMPLIANCE WITH 21 CFR 1040 10 AND 1040 1 CAUTION ONLY QUALIFIED PERSONNEL MAY SERVICE THIS INSTRUMENT Model 3786 Ultrafine Water based Condensation Particle Counter Labels The Model 3786 Ultrafine Water based C ondensation Particle Counter has labels on the back of the instrument and on interior components Labels are described below 1 Serial Number Label back panel TSI Label with Model 3786 Monal Esc Saa gt 1 O 500 Cardigan Road St Paul Minnesota 55126 e 1 800 861 7032 651 765 3797 Made in USA 2 Customer Service Label back panel For Service and Information Call Customer Servica TSI Particle Instruments 651 765 3797 1 800 861 7032 500 Cardigan Road Shoreview MN 55126 U S A le 3 Laser Radiation Symbol Label located internally on the optical detector assembly 4 Class 1 Laser Label back panel LASER RADIATION WHEN OPEN CLASS 1 LASER
45. ns HyperTerminal is a trademark of Hilgraeve Inc 4 4 Model 3786 Ultrafine Water based Condensation Particle Counter PC 104 Single It is recommended that the terminal software be set up to translate incoming carriage returns CR to carriage return line feed CR LF sequences so the data returned from the UWCPC does overwrite the previous written line piling all the data on a single line on the screen It is also convenient to enable local echoing of characters so data typed on the keyboard is shown on the screen as well Once connected and running pressing the Enter key within the terminal software will elicit a response of ERROR from the UWCPC This indicates that the UWCPC and computer are in communication but it didn t know what you were asking Data records beginning with the character D will also be displayed every six seconds as the UWCPC reports from its power up default condition Appendix B Firmware Commands contains a large list of commands that control the operation and data reporting options of the UWCPC The most immediately useful command is the SM Set Mode command which controls what data is reported and its frequency The power up default mode is SM 2 60 which implies sending a data D record continuously at the rate of once every sixty tenths of a second Once data is being reported to the screen of the terminal software it is quite straightforward to cut and paste or turn on the sof
46. onnecting sample sources Keep sample lines as short as possible Use of metallic or conductive sample lines is recommended to reduce particle losses due to electrostatics Avoid larger pressure restrictions gt 25 cm water at 0 6 L min or sample sources with pulsating pressure Model 3786 Ultrafine Water based Condensation Particle Counter CHAPTER 4 Data Collection This chapter contains information related to the UWCPC s data interfaces and optional embedded PC 104 single board computer for data collection Data Interfaces The UWCPC provides several data interfaces allowing for flexible data collection and instrument control There are four connectors on the back panel Two connectors provide direct access to the UWCPC and the remaining two provide access to the optional PC 104 single board computer SBC The connectors are Serial Standard RS 232 type serial communications This interface is provided through the 9 pin D Sub connector on the back panel of the UWCPC The connector pin out is given in Table 4 1 USB Universal Serial Bus communications This interface provides an alternate path for the serial interface mentioned above To a host computer this interface acts like an additional serial port to the computer PC 104 Serial Serial communications to the optional internal PC 104 SBC PC 104 Coml PC 104 Ethernet Ethernet connection to the optional internal PC 104 SBC PC 104 ethO Table 4 1 Serial Connector Signal
47. ont panel indication that the reservoir is full If the reservoir remains full for one hour the instrument will halt both water and air flow pumps waiting for the reservoir to be emptied 3 Recycle Auto Drain Mode Setting the drain mode to 3 allows the WCPC to recycle water from the reservoir back into the WCPC This mode is similar to mode 2 except that when the reservoir is detected as full a drain cycle is automatically initiated 4 Auto Drain Mode Setting the drain mode to 4 causes the WCPC to automatically initiate a drain cycle once a full condition is sensed in the reservoir 5 Continuous Drain Mode Firmware Commands B 5 B 6 SDO SDT Command SDM n Command to set drain mode n mode ranging 0 to 5 Response OK Response Example SDM 2 Command to set drain mode to Recycling OK Response Set Detector Offset This command sets the detector offset control Typically the autozero function SZ command is used to automatically set this value This command can be used to manually set the offset or to read its current value Command SDO xxxx Set Detector Offset command xxxx ranges 0 to 4095 2048 is nominal Response OK Example SDO 2200 Command OK Response SDO Command 2200 Response echoing current offset control value of 2200 Set Detector Threshold This command sets the threshold value in millivolts for particle pulse detection or returns the value of the current setting if no parameter is supplied Comma
48. ore times to increase the number of injections from the initial 20 up to at least 400 This will purge the water source tubing Note that the water injection pump makes more noise when operated dry this is normal 5 Drain the UWCPC a Connect a drain bottle to the Drain connector on the back panel of the UWCPC Press the Drain Prime button on the front panel of the UWCPC to bring up the drain menu Press and hold the Drain Prime button to active the drain cycle Let the water drain from the reservoir for the one minute drain cycle Tipping the UWCPC toward the side will allow for more complete draining of the unit Tip only to the side and not to the back as shown in Figure 2 5 Little or no water may drain if the reservoir is nearly empty Remove the drain bottle connector Remove the drain bottle and dry completely Unpacking and Setting Up the UWCPC 2 7 Figure 2 5 Tipping the UWCPC During Drain Cycle for More Complete Drain of the Reservoir 6 Turn the UWCPC off and remove the power cord Remove the Wick a Loosen the Sample Inlet thumbscrews and remove the Sample Inlet assembly by pulling downward and out Do this near the edge of the table so the growth tube wick can be removed by sliding it down over the table edge Remove the wick from the Inlet assembly Allow the wick to air dry and store in a plastic bag with the UWCPC accessories Reinstall the Sample Inlet assembly without the wick and tighten
49. osol Medium Use with air only 10 C to 35 C Light Source 3 mw 655 nm laser diode Flow Aerosol flow rate Sheath flow rate Inlet flow rate Flow control Flow source Absolute Pressure Operating Range Inlet Pressure Gauge 0 3 L min nominal 0 3 0 03 L min 0 6 0 03 L min Two internal pumps controlled to calibrated pressure drop across orifice with inlet pressure correction Two internal diaphragm pumps 50 to 110 kPa 0 5 to 1 1 atm 2 5 kPa 10 in of water Condensing Liquid Filling system Water distilled water recommended Internal liquid injection valve with water recycling capability Source water container located externally Optional Auxiliary Single Board Computer SBC An internally mounted PC 104 SBC provides externally available Serial and Ethernet ports and internal serial connection to UWCPC The SBC is provided with Linux OS Web server FTP and Telnet services Communications UWCPC control and data can be accessed digitally directly using USB or Serial interfaces Serial and Ethernet interfaces are available to the internal SBC which has an internal serial interface to the UWCPC Analog Output 0 10 volt controlled via communications from PC 104 or serial interface Front Panel Display LED Indicators Buttons 140 x 32 pixel VF Display provides output of particle concentration bar graph history of particle concentration part
50. ove any connection to the sample inlet and reinitiate the drain cycle Alternatively connect the Vent connection to the Drain bottle to equalize the pressure The reservoir will not drain completely during a drain cycle but draining can be assisted by tipping the UWCPC to the side toward the drain port Do not tip the UWCPC toward the sample inlet as the internal drain port connection to the reservoir is on the side To prepare the UWCPC for shipment refer to the Transporting section in Chapter 2 Unpacking and Setting Up the UWCPC for details on how to completely dry the UWCPC Model 3786 Ultrafine Water based Condensation Particle Counter Water Spurts Out of Pump Exhaust Water emitted from the pump exhaust is typically symptomatic of e Insufficient priming during initial startup When the UWCPC is first started after being dried the unit must be primed with approximately 400 priming injections before the internal reservoir trap is filled If the pump is started before trap is filled the trap will bubble causing water bubble into the pump flow system and out of the pump exhaust Other possible causes of water in the pump exhaust are e Pressure surges on the sample inlet e Excessive tipping of the unit during operation e An obstruction of the sample nozzle orifice e Failure of the temperature control on the water separator All of these situations will cause water to enter the air flow system downstream of the water
51. re V 0 and V t sample interval respectively Note If the combination of sample time t and v result in a calculated V t sample interval that is greater than 10 000 volts an error will be returned and the current operating mode will not be changed Firmware Commands B 11 Command SM n ttt Vmin tau tfp tbp Scanning command N mode 5 6 ttt sample interval in seconds 1 to 600 Vmin starting voltage in microvolts tau scanning constant in milliseconds 100 1000000 tfp front porch dwell time in seconds 0 600 tbp back porch dwell time in seconds 0 600 Response oK Examples SM 5 60 10000 8686 3 1 Command to begin a scanning sample oK Response Sixty Z records reported see Z record in Data Reporting Records section in this Appendix SM Command to read back the current setting 5 60 10000 8686 3 1 Response sent between Z records SO Set Optics Heater The set optics heater command switches the optics heater on or off The heater is always in the on condition when the instrument is first powered up Command SO x Command to set optics tube heater on or off x 0 turns heater off x 1 turns heater on Response OK Example so 0 Command turns heater off oK Response so Command to read back the current setting 0 Response indicates heater is off SOS Set Optics Temperature Set point This command sets the control temperature set point for the optics section of the UWCPC The set point temperature is provided
52. red High flow rate Growin tube detected wick is dry power Particle concentration Normal Normal flow Normal is over about operation rate operation 5 0 cm Air Flow System A pair of pumps draw aerosol into the UWCPC and provide the sheath flow These pumps can be turned on or off by pressing the Pump button on the front panel The UWCPC saves this on or off condition so when the instrument is turned on it will resume that state after the warm up cycle The Flow indicator light on the front panel provides an indication of the pump and flow status When operating a flashing Flow indicator results from the inability of the pumping system to maintain the calibrated flow This may be the result of excessive pressure variations at the sample inlet Inlet flow is feedback controlled to maintain a steady calibrated value of 0 6 L min volumetric flow rate The sheath flow is feedback controlled to a value of 0 3 L min and the difference between these flows is the aerosol flow rate which is nominally 0 3 L min The feedback controls includes a measure of the inlet absolute pressure to continuously compensate for pressure changes There is an internal purge flow 10 of sheath that draws air out of the sheath flow loop to minimize any reentrainment of particles into the sample stream during changes in inlet pressure This maintains the instruments response time and zero count performance The Instrument Operation 3 5 Water System 3
53. ro set point Xxx 1 to 350 Response OK Example SFZ 164 Command to set current flow zero value OK Response indicates acceptance SFZ Command to read current flow zero value 164 Response Set Growth Heater The set growth heater command switches the growth tube heater on or off The heater is always in the on condition when the instrument is first powered up Command SG x Command to set growth tube heater on or off x 0 turns heater off x 1 turns heater on Response OK Example SG 0 Command turns heater off OK Response SG Command to read back the current setting 0 Response indicates heater is off Firmware Commands B 7 B 8 SGS SHS SIP Set Growth Tube Temperature Set point This command sets the control temperature set point for the growth tube section of the UWCPC The set point temperature is provided in tenths of a degree Celsius This parameter is not stored and will revert to the default values on the next power up cycle The factory default setting of this value is 750 75 0 degrees C Command SGS xxx Command to set Growth Tube temperature set point xxx 0 to 800 Response OK Response Example SGS 750 Command to set Growth Tube temperature to 75 0 deg OK Response SGS Command to read back the current setting 750 Response indicates the set point value Set SHeath Flow Set Point This command is used to set the sheath flow control set point which represents 0 3 L min for the sheath flow control system
54. s ce ee ass 3 4 Pareles an el a dede deseas 3 4 Status are in eine 3 4 POW ne hac akg a ee ae eee dads 3 4 LAGUIG nasse ansehe teens 3 4 ASA A ON 3 5 Water System in een een ne 3 6 Drain M des r un rei 3 7 Sample Inlet C nneetion uren seien 3 8 4 Data Collection nee cti 4 1 DataAnterf cesz ne RR ae E E abate 4 1 USB Driver Sofware mida 4 3 Communications Parameters oocoocncnconcnncnconcncnnnnnancnncnnnnnnnnnns 4 4 Terminal Communications occocccccnoconcnncnncnncnnncnnrnncancnncnnrnnnes 4 4 PC 104 Single Board Computer Option ooccoccnnccnnocnnicnnincnnnins 4 5 5 Maintenance and Troubleshooting 5 1 Replacing Wick ooomccnccooonncnnnnooonnnnnnnonnnnnnencnnnnnoncnnnnnnncnnnnnnnos 5 1 Flow Calibration err oee OTTE RR E O 5 1 Troubleshooting ita di e E eher 5 3 Water in the Sample Inlet ooocccnccnccnnncnnncnnnocnnacnnacanccnacanoss 5 4 Little or No Water Flows During Drain Cycle 5 4 Water Spurts Out of Pump ExXhaust cccooccncncccnnnncnnnccnnnnncnnnnss 5 5 High or Low Photometric Readings coocccccccncconoconioconicanicinanes 5 6 Rapidly Flashing Status Indicator LasSeT oocccoccnoccnocnnicinines 5 7 Technical Contacts vs u a ea aa 5 7 Returning the UWCPC for Service uunsssennssennssnnnnennnnnenn trees 5 8 Appendixes A Specifications iii in alt A 1 B Firmware Commands oooocooonnnnnnnnocnnnnnnncccononnnncnnnnnnnocnnnnininos
55. s B 1 Commands Quick Reference ooccocnocnccnnonnnnnncnncnncnncnnnnnncnnos B 1 Rea d Commands ns ee rin B 2 Set COMAS diia tae B 4 Data Reporting Records cocccncccnocnnoconaconiconaconacinacinaninnncnn B 16 Index ING EX A O OO 1 1 x Model 3786 Ultrafine Water based Condensation Particle Counter Figures Tables 1 1 1 2 2 1 2 2 2 3 2 4 2 5 2 6 4 1 5 1 2 2 3 1 4 1 Model 3786 Ultrafine Water based Condensation Particle Counter UWCPC oococcncncncncncocononcncncncananononononno UWCPE Flow Diagram anne nenn Location of UWCPC Wick on Sample Inlet Assembly Installation of UWCPC Wick on Sample Inlet Assembly FiUl Bottle Connection rt a Drain Bottle Connection 42444444snnennnne nennen nennen nen Tipping the UWCPC During Drain Cycle for More Complete Drain of the Reservoir u 2ussssenneeeennee een Location and Removal of Reservoir Cover nscnssenssenssen eres UWCPC Data Communications Diagram ur seneennennen Location of Purge Flow Line ooccooccnnccnoncnnncnnaconaconaronanononos Components of the Ultrafine Water based Condensation Particle COUNTER seis cess ta Replacement Parts for the Ultrafine Water based Condensation Particle Counter oonccoccnnccnnocnnocnncnnnccnunanaso Front Panel Indicator Conditions oocococccccncnccncnncnnnncnncnrono Serial Connector Signal ConnectioN cooccncccnoconiocnnicanicnninos
56. s the analog output zero levels Command SVZ hhh 111 Command to set high and low analog output zero level hhh 0 to 4095 111 0 to 4095 Response OK Response Example SVZ 200 300 Command to set analog output zero values OK Response SVZ Command to read back the current settings 200 300 Response Set Auto Zero Function This command executes an auto zero function that calibrates the photo detector offset the dead time measuring circuit and the flow transducer zero value This command will affect the instrument s calibration Model 3786 Ultrafine Water based Condensation Particle Counter Command Response Example SZ 1 Command to set execute an auto zero function c d 1 h Response c change in offset bits d current detector offset bits dead time zero value bits h dead time span value bits SZ 1 Command to run auto zero function 100 2900 23 3370 Response SZ Command to read back the current values 0 2900 23 3370 Response Firmware Commands Data Reporting Records B 16 D Record data D Mode Flags CN ST LT CNT PM RP D Mode Flags CN ST LT CNT PM RP Record Identifier Current Operating mode Status Flags Weighting Description 1 Live time was less than minimum set by SLM command for at least a portion of the sample 2 Overflow of data in one of the data record fields 4 The flow was out of range for some portion of the sample 8 Absolute pressure out of range for some portion
57. seconds of the real time This indicates that the particle concentration reported is over the specified range of the instrument 3 1 3 2 Bar Graph Screen The Bar Graph screen displays measured particle concentrations over history The graph rolls right to left with new data being added on the right for each update The vertical scale is in units of the log of the particle concentration The scale is automatically updated to include the highest recorded concentration over the history Three decades of particle concentrations are displayed The horizontal time scale is determined by the sample reporting time set by the communications interface On power up the sample reporting time is set to six seconds The Bar Graph display then updates every six seconds with new concentration data The graph contains a total of 120 time points so twelve minutes of concentration will be displayed If the sample reporting time is changed see the SM command in the Communications section the time associated with each horizontal bar will changed to match the new setting If the data collection mode is turned off SM 0 command no data will be available to graph and the Bar Graph screen will not be available for viewing The Bar Graph display also allows a convenient means to monitor data being reported over the communications interface Status Screen The Status screen provides information about the operating condition of the instrument The top line o
58. separator Water in these lines needs to be removed before a controlled sample flow can be maintained Performing the following steps will generally clear the lines and restore normal operation 1 Turn off the pump and disconnect any connections to the Sample Inlet Remove the wick and disconnect the Fill Bottle Connect Drain Bottle and perform a manual Drain cycle Operate unit with the Pump on for a period of at least eight hours to dry the flow lines 5 Connect a flow meter to the Sample Inlet and check for proper flow rate Low flow values may indicate an obstruction in the sample nozzle or other portions of the flow system Replace the wick and reconnect the Fill Bottle 7 The unit can now be reprimed with water and returned to service Reoccurrence of symptoms may indicate a failure of the water separator or an obstruction in the flow system Contact TSI for service Maintenance and Troubleshooting 5 5 High or Low Photometric Readings A good check of the instrument s optical health is the raw Photo value displayed on the status screen The baseline value should be between about 150 and 280 when the instrument is warmed up and the pump is off no flow Lower values than this should only occur during warm up when the photo detector has not reached its operating temperature Values higher than this range may occur before the instrument has reached operating temperature or the optical background light has incr
59. ser drive setting 600 600 Response provides current reading and current set point SLS 2000 Command to set laser control value to 2000 Value exceeds laser set point maximum Response indicates value exceeds maximum allowed maximum set point may not be 2000 it is instrument specific Set Mode This command sets the data collection mode for the instrument along with the sample interval There are six data collection modes as follows Mode Description 0 Idle No data collection The D record holds the last data taken Collect one sample interval of data and report D record at completion Continuously collect data and report data at end of every sample interval Like mode 1 but also includes an S record report at end of sample interval Ae U N e e Like mode 2 but also includes an S record report at end of each sample interval 5 Collect one sample interval of scanning data and report appropriate number of Z records 6 Continuously collect scanning data and report Z records as data is collected Modes 5 and 6 may not be implemented T Like mode 3 but also includes A amp C record reports at the end of each sample interval 8 Like mode 4 but also includes A amp C record reports at the end of each sample interval Modes 7 and 8 are intended for diagnostics only Model 3786 Ultrafine Water based Condensation Particle Counter The second parameter provides a sample collection time At the end of each sample time the
60. stem This instrument utilizes a new patented technology Aerosol Dynamics Inc Berkeley CA that allows water to be used as the working fluid without the requirement of mixing or adiabatic expansion techniques The aerosol sample is uninterrupted and follows a laminar flow path from the sample inlet to the optical detector Refer to Figure 1 2 for a diagram of the UWCPC flow system The aerosol enters the sample inlet and immediately half of the inlet flow is extracted filtered and then combined with the remaining sample flow as clean sheath air This combined flow enters a region surrounded with wetted media The aerosol stream is saturated with water vapor and is temperature equilibrated The sample then passes to a growth section where the wetted walls are heated to produce an elevated vapor pressure The high diffusivity of water vapor allows the vapor to reach the center of the sample stream at a faster rate than the thermal diffusivity of the vapor can equilibrate to the higher temperatures near the walls This results in a supersaturated condition along the radius of the flow stream Particles in the flow stream act as nuclei for condensation Water continues to condense on the particles as it passes up the growth tube and the enlarged particles are then detected by the optical detector The clean sheath air is used in this system to keep the aerosol sample flow in the center of the growth tube where super saturation is the highest Produ
61. tenance 5 1 purge flow line manual location 5 2 copyright iii history ii R part number iii purpose xiii read commands B 2 related product xiii read displayed concentration B 2 minicom 4 4 read laser B 2 Model 3007 manual xiii read record analog B 2 Model 3010 manual xiii read record control B 2 Model 3022A manual xiii read record data B 2 Model 3025A manual xiii read record status B 2 Model 3760A 3762 manual xiii read time on B 3 Model 3782 manual xiii read version B 3 Model 3785 manual xiii reader s comments B 1 Model 3786 removing protective cap on sample inlet 2 2 components 2 1 removing wick 2 8 concentration calculations 1 5 replacing wick 5 1 connecting power 2 4 reservoir draining 2 7 removing cover 2 9 flow diagram 1 4 response time A 1 how it works 1 3 returning the UWCPC for service 5 8 maintenance 5 1 overview 1 1 S priming 2 4 replacement parts 2 1 safety v setting up 2 2 sample inlet 2 2 shipping 2 6 connection 3 8 storage 2 6 water 5 4 transporting 2 5 Scanning Mobility Particle Sizer spectrometer 1 1 troubleshooting 5 1 5 3 schematic 1 4 unpacking 2 1 service 5 8 set commands B 4 P Q set absolute pressure scale factor B 4 set analog output voltage B 14 packing list 2 1 set analog voltage span B 14 particle concentration A 1 set analog voltage zero B 14 particle concentration accuracy A 1 set auto zero function B 14 particle indicator light 3 4 set dead time
62. the UWCPC are feedback controlled to set point values stored in non volatile memory The inlet flow can be readily checked by connecting a volumetric flow meter to the sample inlet and turning on the pump The indicated flow value should be 0 6 L min plus or minus about 5 The actual aerosol flow rate is the difference between the inlet flow rate and the sheath flow rate To check this value the instrument cover must be removed and a flow meter connected to the sheath flow tube The sheath air flows through a tube marked with a green marking tag refer to Figure 5 1 The tube connected to the UWCPC engine assembly should be separated from the stainless steel fitting marked with the green tag Once separated the open end of the stainless steel fitting can be connected to a flow meter with a short length of flexible tubing The air flow out of this fitting contains both the sheath flow and the 5 1 purge flow To measure the sheath flow without the influence of the purge flow pinch off the purge flow using a hemostat or thin nosed pliers on the tube marked with a yellow indicator tag The value of the flow in the sheath flow line should be 0 3 L min plus or minus about 5 Restoring the purge flow should add about 10 to the sheath flow value The actual value of purge flow is not critical but the change in flow measured by pinching off the purge line indicates that the line is working and is unobstructed The flow measurement should be made only wh
63. the thumbscrews 8 Drain and dry the reservoir a Make sure the UWCPC is turned off and the power cord is removed Lay the UWCPC on its side over some paper towel The Fill and Drain connectors must be down toward the work surface Model 3786 Ultrafine Water based Condensation Particle Counter Figure 2 6 Location and Removal of the Reservoir Cover Caution Do not turn the UWCPC upside down Flooding of the optical system could result if the unit is inverted with water present in the system c DO NOT TURN THE UWCPC UPSIDE DOWN Remove the reservoir cover from the bottom of the WCPC using the eight screws indicated in Figure 2 6 e Tip the UWCPC up on its feet and lay it down on its opposite side to allow the water in the drain lines to purge f Dry the reservoir and the cover completely g Reinstall the reservoir cover being careful to fit the O ring in place h Set the instrument back in its upright position 9 Final drying a Connect power cord and turn on UWCPC b Once warm up cycle is complete make sure pump is turned on c Let instrument run for at least two hours d Turn off the UWCPC and remove the power cord Unpacking and Setting Up the UWCPC 2 9 The Display CHAPTER 3 Instrument Operation This chapter contains operating information for the Model 3786 Ultrafine Water based Condensation Particle Counter UWCPC The Display button on the front panel selects what data or stat
64. turator Temperature Set Point This command sets the control temperature set point for the saturator section of the UWCPC The set point temperature is provided in tenths of a degree Celsius This parameter is not stored and will revert to the default values on the next power up cycle The factory default setting of this value is 120 12 0 degrees C Command SSS xxx Command to set saturator temperature control set point xxx 0 to 800 Response OK Response Example sss 120 Response sss Command to read back the current setting 120 Response indicates the set point value Firmware Commands B 13 sv SVS SVZ SZ Set Analog Output Voltage This command sets the voltage on the analog output connector on the back panel of the UWCPC This command will return an ERROR if the UWCPC is operating in scanning mode SM 5 or SM 6 see SM command Command SV xxx Command to set analog output voltage xxx 0 to 10000 mv Response OK Response Example SV 2000 Command to set analog output voltage to 2 0 volts OK Response SV Command to read back the current setting 2000 Response Set Analog Voltage Span This command sets the span value used for the analog output voltage Command SVS xxx Command to set analog voltage span value Xxx 1 to 65535 Response OK Response Example SVS 3276 Command to set analog voltage span to 3276 OK Response SVS Command to read back the current setting 3276 Response Set Analog Voltage Zero This command set
65. tware s logging capability to capture the data Data in this comma delimited form is easy to import to other programs such as Microsoft Excel for analysis and graphing Board Computer Option The UWCPC with the PC option is assembled with an internal PC 104 style single board computer SBC The SBC used within the UWCPC at the time this manual was written is a PCM 3347 3348 manufactured by EMAC Inc http www emacinc com The SBC is loaded with the Linux operating system It is expected that the user have a working knowledge of Linux and some programming experience in order to use this option Data Collection 4 5 4 6 The SBC is setup to provide the PC 104 Serial port to be a terminal server A terminal or computer running terminal emulation software can access the SBC through this port A Null Modem crossover cable is needed to connect a computer to this port The default serial settings for the PC 104 terminal server are Baud Rate 9600 Bits Character 8 SlOPiDItS sic cece es 1 P rity eiin eves None A login prompt is provided The user name and password for the default configuration of the SBC are User Name root Password emac_inc The SBC Ethernet port ethO is configured to gather an IP address from an external DHCP server For the SBC to actually acquire an IP address it must be connected to a network with an active DHCP server BEFORE powering up the UWCPC The connectio
66. unction which will begin a sequence of twenty water injections Each further press of the Drain Prime button adds to the number of injections that will be performed Press the Drain Prime button several more times to increase the number of injections from the initial 20 up to at least 400 Keep the pump off during this initial priming Repeated or excess priming will not harm the instrument and will only pass excess water to the drain reservoir 6 Warm up the instrument Model 3786 Ultrafine Water based Condensation Particle Counter Transporting Wait for the UWCPC to warm up and reach operating temperatures When the UWCPC is ready the status indicator will be a steady green 7 Connect the aerosol source a Turn on the pump by pressing the Pump button The UWCPC remembers the state on or off of the sample pump when it is powered off Connect the Sample Inlet to an aerosol source to be measured to begin measurement of the aerosol sample This section describes the proper procedure for transporting the UWCPC short distances and how to prepare the instrument for shipping and storage Local Transporting The following procedure may be used to transport the UWCPC over short distances such as across a lab down the hall on a cart and even a short drive in a vehicle as long as the instrument is not subjected to tipping of more than 45 degrees or prolonged freezing temperatures 1 2 3 Disconnect any co
67. ur on line RMA form at www tsi com Customer Service will need the following information when you call or use the on line form e The instrument model number e The instrument serial number e A purchase order number unless under warranty e A billing address e A shipping address Use the original packing material to return the instrument to TSI If you no longer have the original packing material seal off any ports to prevent debris from entering the instrument and ensure that the indicator lights and the connectors on the instrument front and back panels are protected when shipping If you have any concerns regarding shipping the instrument contact TSI for assistance Model 3786 Ultrafine Water based Condensation Particle Counter APPENDIX A Specifications Model 3786 Ultrafine Water based Condensation Particle Counter UWCPC specifications are as follows specifications are subject to change Particle Size Range Minimum detectable particle D Maximum detectable particle 2 5 nm wettable aerosols gt 3 micrometers Particle Concentration Single particle counting live time corrected O to 1 x 10 particles cm Particle Concentration Accuracy 12 at lt 10 particles cm does not include error due to counting statistics False Background Counts lt 0 001 particle cm one hour average Response Time lt 2 seconds for 95 response to concentration step change Aer
68. us information is shown on the graphics display During the warm up period the Display button allows selection between the Warm up screen and the Status screen Once warm up is complete pressing the Display Button switches the information shown on the graphics display Up to four different screens of information can be displayed These screens are the Primary Concentration Bar Graph Totalizer and the Status screen The content of each of these screens is given below Primary Concentration Screen 1 34e4 cm The Primary Concentration screen is updated each second with an indication of the particle concentration Displayed values range from 0 00 particles cm to 9 99e particles cm For concentrations of 20 0 particles cm or higher the display value is calculated on data measured over the previous second For concentrations less than 20 0 particles cm six seconds of particle count data is used in the calculation of particle concentration At this level of concentration a single particle represents 0 03 particles cm so there will be significant variation in displayed values from one display update to the next because of the statistical nature of the arrival of particle at the detector For a more statistically accurate measure of particle concentrations consider using the Totalizer function The OVER is displayed in the upper right hand corner of the screen when the measured live time is less than 40 0 4
69. us Indicator Laser A rapidly flashing Status indicator occurs whenever the laser is not operating at its set point value This will happen under the following conditions e The laser has been turned off using a SL O command through one of the serial data interfaces e On power up the UWCPC detected that the laser set point value exceeded the maximum allowed laser power This is also accompanied by a message on the display during start up The UWCPC leaves the laser off when this condition is detected e The laser is no longer able to provide the power necessary for proper operations and needs to be replaced The laser diode is not a user replaceable part contact TSI Customer Service for repair Technical Contacts e Ifyou have difficulty setting up or operating the Model 3786 UWCPC or if you have technical or application questions contact an applications engineer at 1 800 861 7032 USA or 001 651 765 3797 e Ifthe UWCPC does not operate properly or if you are returning the UWCPC for service contact TSI at TSI Incorporated 500 Cardigan Road Shoreview MN 55126 USA Phone 1 800 861 7919 USA or 001 651 490 3838 E mail technical service tsi com Website http service tsi com Maintenance and Troubleshooting 5 7 Returning the UWCPC for Service 5 8 Before returning the UWCPC to TSI for service call TSI at 1 800 861 7919 USA or 001 651 490 3838 for specific return instructions Or you can fill out o
70. us improve our manuals by completing and returning this questionnaire to the address listed in the About This Manual section Feel free to attach a separate sheet of comments Manual Title Model 3786 Ultrafine Water based Condensation Particle Counter P N 1930072 Rev B 1 Was the manual easy to understand and use U Yes A No Please identify any problem area s 2 Was there any incorrect or missing information please explain 3 Please rate the manual according to the following features Good Adequate Poor Readability Q a Q Accuracy a a m Completeness is everything there a a m Organization finding what you need a a a Quality and number of illustrations a a a Quality and number of examples a a a Comments 4 Which part s of this manual did you find most helpful 5 Rate your level of experience with the product Beginning U Intermediate U Expert 6 Please provide us with the following information Name Address Title Company TSI TSI Incorporated 500 Cardigan Road Shoreview MN 55126 U S A Web www tsi com P N 1930072 Rev B Copyright 2005 by TSI Incorporated For current information www tsi com All rights reserved

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