Tsi nephelometer 3563 manual

Select the Setup button from the Print display to set up the printer. Using the Config Menu The Config menu commands let you configure the Nephelometer and select the communications port that the Nephelometer is connected to.

Note: Setup is not the same as calibration. Select the Calibration command from the Run menu to calibrate or recalibrate the Nephelometer. Select the Set button after assigning a data type to each channel. Channel No. Note: When you start data collection, the Data Display window is automatically opened and minimized.

You can double-click on the Data Display icon to open its window instead of selecting it from the View menu. Page 76 Graph Display icon to open its window instead of selecting it from the View menu.

The default graph options show the scattering coefficients over time in the top graph and status parameters in the lower graph. The parameters you can select are described in Table To print the graph, select Print from the File menu.

You can double-click on the Photon Frequency icon to open its window instead of selecting it from the View menu. Page Photon Frequency Display Figure Photon Frequency Display The Photon Frequency display shows the raw photon frequency calculated by the software from the raw photon counts collected by the Nephelometer.

The raw photon frequency is displayed for each section of the calibrate shutter calibrate, measure, dark , at each wavelength blue, green, red.

DAT, which is the default config file used by the software. You can display current configuration parameters or read a configuration file from disk when the Use Default Config File option is selected. It is also useful because you can store, then easily retrieve, different configurations if the current Nephelometer configuration should become lost or corrupted.

Large files can take a long time to process and load. Watch the bottom of the screen to verify the file is being processed. Select the appropriate type of graph and press OK. Figures through shows the type of information shown in each graph.

Page Photon Counts Measure Graph only the record types marked will be copied , the delimiter that will be used between fields, and the destination of the data clipboard or disk file. This allows you to select a lower averaging time to Model Integrating Nephelometer Page Calibration Parameters Setup Screen have a better response time in viewing the low span gas being purged and replaced by the high span gas.

Note: If the averaging time is changed to a low number such as 5 sec to view purging, be sure to change the averaging time back to a higher number default is sec.

Page 90 CO C a u t i o n Use calibration gases only in a well-ventilated area or exhaust the gases outside. Many gases used for calibration can cause asphyxiation if used in a confined area. Page 91 Note: If you are using air as the low span gas and CO as the high span gas, perform the calibration steps in the order given.

If you are using a gas other than air as the low span gas like helium , refer to calibration process given at the end of this procedure. Page Performing Select to write an identifying label for the calibration performed.

The label can include the serial number of the Nephelometer, the calibration date, the low span and high span gases used, and the initials of the person performing the calibration. Page 93 Step Explanation After selecting step 14, 1. Remove the high span gas and the inlet and outlet plugs from the Nephelometer. To verify that data collection is underway, look in the lower right corner of the display. It should indicate Polled. Data files can become quite large if you have a short averaging time and allow data to accumulate over a long period of time.

As a rule or thumb, do not allow files to get much larger than kbytes. Data collection then continues and data is logged to the same log file as before. This help function is patterned after Windows Help, so if you are familiar with Help in Windows, you should find this function easy to use. If you are unfamiliar with Windows Help, review your Windows documentation. Page Baud Rate Set commands, which set all the operating parameters for the Nephelometer Action commands, which control mechanical components of the Nephelometer Read polled commands, in which the Nephelometer sends data in response to a specific request from the computer Model Integrating Nephelometer Page Unpolled commands, in which the Nephelometer automatically outputs data records at specific intervals.

No line feed characters are transmitted. Either the requested data or an "OK" is returned if the command is understood. Page Set Commands Set commands allow you to set up operating parameters for the Nephelometer.

If a set command is sent with no parameter, the current parameter is echoed. Note: Some of the commands directly affect or are affected by other commands. Page Set Calibration points SC allows you to calibrate the four internal sensors by entering low and high calibration points. Examples To set the output delimiter to a comma character: To echo the delimiter: Model Integrating Nephelometer Page Set K calibration constants SK allows you to enter calibration constants for each of the detection colors blue, green, and red.

Page "v" measured autozero baselines are averaged together. Examples To set the autozero mode to air-chop, with a baseline zero value based on the average of the last twelve readings: SMZ12 To echo the autozero mode: Model Integrating Nephelometer Unpolled response of data taken between times 1 and 2.

Beginning of zero baseline measurement cycle. Measurement data is suspended and valve is rotated to filtered air position to begin purging the Nephelometer. STA also affects the time between unpolled reports. See Figure STTyyyy,mm,dd,hh,nn,ss where: yyyy is the year - mm is the month 1 - 12 dd is the date 1 - 31 hh is the hour 0 - 23 nn is the minute 0 - 59 ss is the second 0 - 59 Examples Page To set the external host analog value to 2.

Page Set Zero baseline background SZ allows you to externally set zero baseline background values, normally measured during an autozero measurement. SZ also also clears previous zero data taken in air-chop mode.

In air-chop mode, the supplied values are first in the running average of zero baseline values. Page 0 turns the heater control off. When the PD command is given, this sequence occurs: 1. Lamp power off. Heater power off if on. Chopper and shutter motors stop.

Valve switched to filtered air position zero. Page Zero command Z causes the Nephelometer to perform a zero baseline measurement. In air-chop mode, the zero baseline measurement is also averaged with the previous baseline data as defined in the SMZ command. Page Read Commands Polled Read Commands Polled Read commands are polled, which means the Nephelometer sends data in response to a specific request from the computer Note: Some of the commands directly affect or are affected by other commands.

Refer to other commands where indicated. Read raw Analog bit values RA allows the reading of pressure, sample temperature, inlet temperature, and relative humidity in analog bit value format. Page Read Noise sensitivity levels Read noise levels based on photon counting statistics. Example Response????. Read accumulated On time of Nephelometer not including power down time Example Response Page Unpolled Commands Unpolled Commands Use unpolled commands to cause the Nephelometer to automatically output data records at specific intervals.

In unpolled mode, 0 disables a record and 1 enables the record. During unpolled operation, records that have been enabled are sent at the end of each averaging time. Page Unpolled Record Formats Delimiters other than a space, cause the record to be packed with no added white space. P TTT. Page Nephelometer Schematic The reflector focuses the light onto one end of an optical pipe where the light is carried into the internal cavity of the instrument.

The optical pipe is used to thermally isolate the lamp from the sensing volume. Page Reference Chopper Zones The output end of the optical light pipe is an opal glass diffuser that acts as a cosine Lambertian light source. Page S i g n a l P r o c e s s i n g This section describes the microprocessors and equations used in the Nephelometer firmware to calculate various scattering coefficients from the raw scatter data and calibration data.

Two microprocessors are used to control all functions. A Motorola 68HCD3 microprocessor is used to control the brushless DC motors used to spin the reference chopper and optional backscatter shutter. Page Counts Normalize To Photon Frequency Hz When the numbers from the Table are run through equation and equation , the results are shown in Table Scattering is only from the wallscatter and the Rayleigh scatter of the gas.

Page We have two equations, two unknowns K and W wall. Page e. Page Maintenance Overview P e r f o r m i n g M a i n t e n a n c e Use the procedures in this chapter to maintain the Model Integrating Nephelometer.

Most maintenance procedures do not have specific time guidelines, but should be performed based on Remove power from the Nephelometer and from any instruments connected to the Nephelometer. Loosen the four screws fastening the Nephelometer cover and remove the cover Figure Wear a grounded, static-discharging wrist strap. Page C a u t i o n To avoid damage to the electronic circuitry, use electrostatic discharge ESD precautions when removing the Nephelometer cover: Use only a table top with a grounded conducting surface.

Page Pmt Cover Figure PMT Cover C a l i b r a t i n g t h e N e p h e l o m e t e r Calibrate the Nephelometer before an intensive experiment, calibrate periodically to verify no drift has occurred, calibrate if the reference chopper is dirty or scratched, or if you clean the chopper as part of periodic maintenance. Replace the foam inserts in the fan covers and snap the fan covers back in place. Page Top Cover Screws Nephelometer and make sure the chip is seated correctly. Remove power from the Nephelometer, and replace the top cover, attaching the cover with the four screws.

Apply power to the Nephelometer and start the Nephelometer software. Page Select Neph Config. Data from the View Menu. After data is read from the file, select Write data to Neph. Remove power from the Nephelometer, and replace the top cover, securing the cover with the four screws. Page Top Cover Screws R e p l a c i n g t h e L a m p The lamp is a projector-type halogen bulb with a built-in elliptical dichroic mirror.

The lamp is rated at 75 watts with a recommended maximum of 12 volts. The lamp has an estimated life of hours of continuous operation at the maximum power 75 watts. Page Lamp Shield 8. Reattach the end plate using the three screws. Replace the two bottom cover screws. Remove the in. ID silicone tubing from both ends of the blue filter Figure Making sure the arrow of the new filter is pointing away from the inlet block, install the new DQ filter, reattaching the silicone tubing.

Page Top Cover Screws 1. Loosen the four screws fastening the top cover of the Nephelometer and remove the cover Figure Page Lamp Shield 3. Unscrew the two screws attaching the lamp shield Figure Remove the shield, supporting the shield so that it does not hang by the sensor wires. Figure Lamp Shield 4. Allow the lamp to cool and push up the lamp lever to force the lamp from the socket.

Page C h e c k i n g f o r L e a k s This section describes procedures for checking the vacuum integrity of the Nephelometer. Tools needed A vacuum pump capable of 18 in. Unscrew the four bottom cover screws Figure Carefully remove Model Integrating Nephelometer Page the bottom cover, working alternately at both ends. Pry the edges of the cover apart, and ease the cover away from the body of the Nephelometer.

The easier method takes more time. Page Circuit Board Mounting Screws 6. Disconnect the J25 connector attaching a wide ribbon cable from the PMT box to the digital circuit board. Remove the three screws attaching the PMT end plate to the outlet section of the Nephelometer Figure Using one hand to hold the PMT box, use the other hand to slide the aperture assembly from the outlet section of the Nephelometer. Note: Be careful not to let the inner tube drag inside the outer tube and scrape the paint.

Page Aperture Assembly Remove the three screws and washers attaching the circuit board and plate 1 to plate 2 Figure Separate plate 1 and circuit board from plate 2 and turn plate 1 so that the shutter is facing you Figure Use a cotton swab and alcohol to clean only the frosted or reflective aluminum surfaces of the reference chopper.

Note: Although TSI recommends isopropyl alcohol to clean the chopper, alcohol will remove black paint from components. Replace the top cover of the Nephelometer and attach with the four screws. Recalibrate the Nephelometer after you clean the reference chopper. Page Lamp Shield Unscrew the three screws securing the end plate to the inlet section of the instrument and remove the end plate. Page Disconnect Connectors And Tubing d.

Unscrew the four bottom cover screws, and carefully slide the cover off the end of the instrument. Using Figure as a reference: a. Remove the connector for the lamp on the analog board. Remove the ribbon cable connector from the inlet block.

To clean the light pipe outlet: a. Unscrew the four screws, one on each corner, on the aluminum lamp base. Two of the screws are recessed Figure Page Lamp Base b.

Check to make sure the backscatter shutter is located underneath the light pipe. If not, rotate the shutter with your fingers. Figure Lamp Base Performing Maintenance Use a cotton swab and alcohol to clean the outlet, making sure the swab does not touch black components. Note: Although TSI recommends isopropyl alcohol to clean the outlet, alcohol removes black paint from components. Use a soft dry cloth to clean the backscatter shutter.

If necessary, use a soft cloth and a mild detergent solution followed by a soft dry cloth. Attach the connector for the lamp to the analog board. Attach the ribbon cable connector to the inlet block.

Attach the motor controller ribbon cable connector to the lamp block. Page d. Connect these sensor connectors as marked : 1 lamp temperature , 2 valve position , 3 valve motor , 4 heater , and 6 fan. Connect the blue DQ filter silicone tubing at the elbow connector on the backbone and at the elbow connector on the inlet.

If the Nephelometer is resting on its feet, support the underside of the instrument. Page Disconnect Connectors And Tubing 5. Remove the motor controller ribbon cable connector from the lamp block. Pull the flocked paper from the outlet section Figure Figure Flocked Paper Outside the Nephelometer 8. To clean the flocked paper, use a vacuum to take up or a compressed air source to blow away the dirt. Note: If the paper has bald patches, it should be replaced. Page PC board, and O-ring grease.

Disconnect the ribbon cable from the appropriate sensor Figure Remove the four screws from the appropriate PC board and remove the sensor assembly. Page Light sensitive components. Exposing the photomultiplier tubes to direct light may affect tube performance.

Page Pmt Cover 1. Each PMT fits inside a magnetic shield Figure Therefore, it produces accurate measurements, even when positioned inside pressurized aircraft cabins or smoke-filled environments. This three-color nephelometer allows you to measure both total and backscatter signals, and it operates under complete computer control. Software and a separate power supply not pictured are also included with the instrument. This website uses cookies. The web site is now storing only essential cookies on your computer.

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