TSI Instruments 3760 Скачать руководство пользователя страница 19 | Manualshive

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TSI Instruments 3760 Скачать руководство пользователя страница 19

3–2

Model 3760 Condensation Nucleus Counter

detector; its flow is controlled with a critical orifice and maintained by an external
vacuum source.

The heatsink, which makes up the entire back panel of the CNC, dissipates heat by
natural convection. Fans are not used because they could contaminate the
surrounding area. Operate the CNC so that the heatsink is exposed to the cooling
ambient; avoid using the CNC in a tightly-closed space.

The cabinet purse airflow (0.05 cfm) helps to cool the electronics within the
cabinet and creates a slight negative pressure within the instrument. Particles that
may be generated inside the cabinet are quickly carried out through the vacuum
line and do not contaminate the surrounding area.

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Содержание 3760

Страница 1: ...l service in house repair center WE BUY USED EQUIPMENT Sell your excess underutilized and idle used equipment We also offer credit for buy backs and trade ins www artisantg com WeBuyEquipment REMOTE INSPECTION Remotely inspect equipment before purchasing with our interactive website at www instraview com LOOKING FOR MORE INFORMATION Visit us on the web at www artisantg com for more information on ...

Страница 2: ...Instruction Manual Model 3760 Condensation Nucleus Counter This manual is printed on cleanroom compatible paper ...

Страница 3: ...TIONS stated herein No other express or implied warranty of fitness for particular purpose or merchantability is made THE EXCLUSIVE REMEDY OF THE USER OR PURCHASER AND THE LIMIT OF THE LIABILITY OF SELLER OR ANY OTHER SELLER FOR ANY AND ALL LOSSES INJURIES OR DAMAGE IN CONNECTION WITH THIS PRODUCT INCLUDING CLAIMS BASED ON CONTRACT NEGLIGENCE STRICT LIABILITY OTHER TORT OR OTHERWISE SHALL BE THE R...

Страница 4: ...ng Analog Pulses 2 Correcting for Coincidence 2 Calibrating the CNC 2 3 Description of the CNC 3 1 4 Specifications and Electrical Schematics 4 1 Specifications 4 Electrical Schematics 4 Figures 1 1 Back Panel of the CNC 1 2 Advisory Labels 2 1 Front Panel of the CNC 2 2 Inside View of the CNC 2 3 Front Panel s Main Circuit Board for the CNC 2 4 Analog Pulse Trace of the Photodetector Signal 3 1 S...

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Страница 6: ... many features of the CNC Chapter 2 Setup and Operation Explains how to set up and operate the Condensation Nucleus Counter Chapter 3 Description of the CNC Explains the Basic Operation of the CNC Chapter 4 Specifications and Electrical Schematics Gives the primary specifications of the CNC and provides two electrical schematics Help To obtain assistance with this hardware or simply to submit sugg...

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Страница 8: ...r Particle Counter applies to the CNC as well Figure 1 1 TSI Model 3760 Condensation Nucleus Counter Important Information Laser Warnings The CPC is a laser based instrument As such certain precautions must be taken when using and servicing it Do not remove any parts unless instructed to do so in this instruction manual otherwise you may expose yourself to hazardous optical radiation WARNING The u...

Страница 9: ...760 Condensation Nucleus Counter Figure 1 2 Advisory Labels a identification label on the underside b power requirements label on heatsink c warning label on the optics housing d compliance label on the underside ...

Страница 10: ...roper line voltage figure 2 1 4 Plug the enclosed power cord into the CNC connector on the back panel and then into an AC source The cord contains a special line filter to reduce both line noise and the potential for false particle counts 5 Connect a BNC cable to the back panel connectors so both the CNC and Multiplexer Processor or other counter The Multiplexer Processor M P applies the proper mu...

Страница 11: ...area before returning The alcohol will not drain from the connector unless it is connected to the mating part of the CNC Loosen the bottle cap to provide an air vent then connect the fitting to the CNC mating fitting as shown in figure 2 1 Hold the bottle above the CNC to allow liquid to flow into the CNC and observe the liquid level through the window on the front panel When the liquid level reac...

Страница 12: ...wrate of 0 1 scfm Only 0 05 cfm makes up the sample flowstream The remaining airflow is purge air for the cabinet To measure the instrument s flowrate connect a low pressure drop flowmeter to the CNC s inlet A bubble meter or thermal flowmeter such as TSI s Model 2011B works best The flowrate should be 0 05 cfm 1 415 L min 10 percent If the flowrate is too low the orifice may be plugged the vacuum...

Страница 13: ...ether the flow is correct TSI ALCOHOL LEVEL FILL TO LINE DO NOT OVERFILL INLET MODEL 3760 PARTICLE STATUS PRESENT WHEN LIT ON WHEN GREEN CONDENSATION NUCLEUS COUNTER Figure 2 2 Front Panel of the CNC Draining the CNC of Butanol Draining the CNC is essentially the same as filling it Follow these three steps 1 Connect the drain tube that runs to the lower connector on the back panel of the CNC figur...

Страница 14: ...aturator block and out through the drain With about 5 psig of air pressure the saturator will dry out in a few hours Vent the air from the drain tube into a hood or other ventilator You can also dry the saturator block by draining the liquid and then drawing dry air through the instrument with the vacuum source for 24 to 48 hours If you plan to leave the CNC power off for more than two days drain ...

Страница 15: ...wing Analog Pulses You can observe the analog electrical pulses from the photodetector on an oscilloscope Connect the two test pins with a jumper TP1 and TP2 as shown in figure 2 4 The minimum pulse amplitude is about 200 millivolts and the pulse width is about 0 25 microsecond The pulse amplitudes may range as high as 600 millivolts The electrical noise level is about 10 millivolts giving an over...

Страница 16: ...ncentration particles cm3 Ni the indicated concentration particles cm3 Q 46 7 cm3 s t 0 25 microsecond is the effective time each particle resides in the viewing volume The Na in the exponent can be approximated by Ni Calibrating the CNC Apart from the optics alignment the initial factory checkout of the electronics and the periodic flow verification the CNC requires no calibration The flow is con...

Страница 17: ...lse height measurement Particle detection is unaffected by slight degradation in laser power or dirty optics Finally since the CNC is a single particle counter there is no photometric calibration for concentration Figure 2 5 Analog Pulse Trace of the Photodetector Signal While the CNC Samples Ambient Laboratory Room Air The bottom trace is a 100x expansion of one of the pulses from the top trace T...

Страница 18: ...System Figure 3 1 Schematic Diagram of the Cleanroom CNC The sample flow is drawn into a saturator where n butyl alcohol butanol evaporates into the sample stream Although the saturator portion is not heated it tends to be several degrees above room temperature The sample then cools by thermal diffusion in a cooled condenser tube The butanol vapor becomes supersaturated and condenses on the partic...

Страница 19: ...ed because they could contaminate the surrounding area Operate the CNC so that the heatsink is exposed to the cooling ambient avoid using the CNC in a tightly closed space The cabinet purse airflow 0 05 cfm helps to cool the electronics within the cabinet and creates a slight negative pressure within the instrument Particles that may be generated inside the cabinet are quickly carried out through ...

Страница 20: ...luid n butyl alcohol Light source laser diode Analog pulse signal typical 200 mV 0 25 µs Signal to noise ratio 20 1 minimum Digital output square pulse M P 3701 square pulse single channel processor or other counter 15 V 6 5 µs 15 V 0 25 µs Concentration M P 3701 single channel processor or external counter 0 to 10 million ft3 0 to 2 8 x 108 ft3 Size HLW 140 x 155 x 220 mm 5 5 x 6 x 8 5 in Weight ...

Страница 21: ...4 2 Model 3760 Condensation Nucleus Counter ...

Страница 22: ...l service in house repair center WE BUY USED EQUIPMENT Sell your excess underutilized and idle used equipment We also offer credit for buy backs and trade ins www artisantg com WeBuyEquipment REMOTE INSPECTION Remotely inspect equipment before purchasing with our interactive website at www instraview com LOOKING FOR MORE INFORMATION Visit us on the web at www artisantg com for more information on ...

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