5400 Inlet Flow Check & Automatic Leak Check

Purpose:  Follow the steps below to check the inlet flow and automatic leak check on the 5400 instrument.

Required Equipment:  BIOS flow measuring kit.

                                           Inline flow adapter.

Reference:  SOPMAN

Follow these steps to perform an inlet flow check.

1. Down OC, TC, and CO2 Purge channels with "set flag" button located on the right side of the site manager screen.

2. Press the RUN/STOP button once.

3. Select F1 (Immed).  This action stops the collection of data.

4. Allow 10 minutes for the instrument to cool down.

5. Obtain the Bios with the high cell and the inline flow adapter used with the Dichot and FRM.

6. Remove the PM10 inlet from the 5400 inlet tripod stand.

7. Connect the Bios tubing from the "Outlet" side of the cell to the inlet using the inlet flow adapter.  Ensure the tubing does not crimp and restrict the flow through the Bios.

8. Turn on the Bios and wait until main menu appears, the press the enter key.

9. Press and hold simultaneously the "select" and "enter" buttons on the BIOS for 2-3 seconds and release to begin recording flow.

10. Record V Ave at 10 cycles from Bios.  Complete this three times.

11. Record the ColFlow from the 5400 instrument display while the BIOS are connected.

12. Record ambient pressure from DAS (BP) and temperature from the psychrometer.

13. Return the PM10 inlet back to the inlet pipe of the 5400 stand.

14. Enter data into electronic flow audit form under 5400 inlet.  The flow audit form is found in the flow check menu on the top toolbar of the site manager.

15. Enter this audit data also into the site log:  Bios flows, temperature and barometric pressure from DAS, 5400 flow from display on instrument and percent difference as calculated from the flow audit form.

16. When complete return the instrument to run mode.

Follow these steps to perform an automatic leak check.

1. Starting at the main screen enter the Service Mode.  Press <MENU> and select “System

Maintenance Menu” from the available choices.  Once in the System Maintenance Screen, select “Leak Tests” to enter the Leak Test Screen.

2. Press F1 to start leak test.

3. Once the instrument performs the analysis loop leak test, it informs the user whether it passed or failed.