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PM10 Set Up and Retrieval

By Jamie Long,2014-01-20 02:48
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PM10 Set Up and Retrieval

    Generously provided by Ethan Hinkley Southern Ute Tribe

    NOx, CO Analyzer Calibrations

    Standard Operating Procedure

1. Plug the Bios dry-cal unit in and turn it on, then let it warm up for about half an hour.

    2. Turn on the DAS. Go to configurations, then to configure data channels and then to mark

    channel offline ? Take NO, NO, NOx, CO offline. 2

    3. Write a note on the chart recorder listing the date, time, event (Gas Cal), and operator initials.

    4. Set up the tubing for your multi-gas calibrator (TE-146) zero-air flow calibration.

    a. For the Zero-air flow calibration: cap off the Gas inlet on the TE-146, also

    close the gas regulator on the gas cylinder.

    b. Use large flow calibrator cell in Bios.

     Zero Air = Open Z.Air in Gas in TE-146 = Closed

     Output

     Large cylinder

     Bios

    5. Go to configurations, select configure calibrations, then go to start a calibration program. 6. Run a Gas Zero event.

    a. Let this event run for a few minutes before starting.

    b. Your TE-146 Gas flow display should read 0.00 SCCM or below (ex. 0.5 or so). 7. Set the Zero air thumbwheel on the TE-146 to obtain a zero air display reading of 2.0 LPM.

    a. Record the reading in your logbook.

    b. Highlight run on the Bios screen and click enter. Then click burst. You will get

    10 bursts and the final S average. Record this number in your logbook. AVG

    c. Repeat 7, a, b and c for Zero Air display readings of 3, 3.5, 4 and 5 LPM.

    i. Plug these values into the Dry Cal spreadsheet (NOTE: DO NOT

    CHANGE OR DELETE ANY EQUATIONS).

    1. Display values (2,3,3.5,4 and 5) go under Display volts (really in

    LPM).

    2. The burst S averages corresponding to each display flow go AVG

    under flow SCCM (Note: multiply the S averages by 1000 to AVG

    convert to SCCM).

    3. The spreadsheet will automatically calculate the linear

    relationship for you. Record the m, b and r values in the logbook

    (Note: r should have ~ 4 9’s, ex. 0.9999xxx).

    a. You will use this equation later.

    d. If the event hasn’t ended, go to configure calibrations, then abort a calibration

    program and select the event which is running (ex. Gas Zero). 8. Set up the tubing for your multi-gas calibrator (TE-146) zero-air flow calibration.

    a. For the Gas flow calibration: cap off the zero air inlet on the TE-146, connect

    the zero air to the gas inlet on the TE-146 and keep the gas regulator off.

    i. Note: we use zero air to calibrate the TE-146 gas flow; this saves

    cylinder gas.

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    Generously provided by Ethan Hinkley Southern Ute Tribe

    b. Unplug the zero air unit from the Z.air switch unit and plug it directly into an

    outlet (when done with the gas calibration plug the Z.air unit back into the switch

    unit).

    i. Lower the output pressure to ~ 20psi (when done with the gas flow

    calibration return this to about 35psi).

    ii. Use the small flow calibrator cell in Bios.

     Zero Air = Open Z.Air in Gas in TE-146 = Closed

     Output

     Small cylinder

     Bios

9. Repeat steps 5-7 for the gas flow calibration setting the gas flow thumbwheel to obtain gas

    displays of 20.0, 30.0, 40.0, 50.0, and 60.0 (IMPORTANT: instead of running a Gas Zero

    event run a Gas span event from the DAS this will open up the gas solenoid for the flow

    calibration).

    a. Note: when repeating 7.c.2 for the gas calibration: gas flows are already in

    SCCM you will not need to multiply by 1000.

10. Return all tubing to original configurations.

     Not changed during TE-146 calibration Zero Air NOx analyzer

     Z.Air in Gas in TE-146 CO analyzer Gas Output Cylinder = Open O3 analyzer

     = Closed External O3 calibrator Solenoid

    *IMPORTANT: Purge the gas cylinder immediately after returning tubing to

    original configurations.

11. Make sure the m, b and r values for the Zero Air flow calibration and the m, b and r values

    for the gas flow calibration are correct in the upper right hand corner of the gas dilution

    calibration spreadsheet.

    a. Also, type the correct gas cylinder concentration (should be listed on the

    cylinder) into the correct cell on the spreadsheet.

    12. The spreadsheet provide flow meter settings for each point of your 5 point calibrations.

    13. Run a gas zero event and set the NOx and CO readings to 0.

    14. Run a gas Span event and set the thumbwheels to provide the correct gas and z.air display

    readings for the highest point (400ppb NOx, 40ppm CO).

    a. After stabilization, set the analyzers to 400ppb (NOx) and 40ppm (CO).

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    b. Then drop your thumbwheel settings to hit your next 4 points Do not calibrate

    Generously provided by Ethan Hinkley the analyzer to any of these points, just check them. Southern Ute Tribe 15. Make sure all data are recorded in the logbooks and site binders.

    16. Once everything is done, put all channels back online.

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