Troubleshooting the Bloodhound's Vacuum Sensor

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Troubleshooting the Bloodhound's Vacuum Sensor

This is a simple procedure that will recalibrate the Bloodhound's vacuum sensor.

1)  This is recomended when you are off bottom.  Make sure you are off bottom
     or tripping.

2)  Observe what the vacuum reading is before unplugging in the sample line.

3)  Pull the sample line from the Bloodhound and make sure that there is nothing
     connected to the outside of the Bloodhound's sample inlet (no fuel filter,
     hose segment etc. - Observe the following image for an example):

4)  Let the Bloodhound it sit and run on "open air" for no less than two (2) minutes
     in order to make sure it settles out properly.

5)  Observe the vacuum reading on the Bloodhound.  Under normal conditions, the
     the vacuum with no sample line connected should be between -6 and -10 (with
     potentialy slight variances outside of this range).  If it is excessively outside of
     this range on open air, you should attempt to re-calibrate the Bloodhound's
     vacuum sensor.  To do this, proceed to the next step.

6)  After the 2 or more minutes has elapsed, reboot the Bloodhound (with the sample
     line still disconnected).  To reboot the Bloodhound:
     a)  Pull the power cord from the Bloodhound 's power port as illustrated below:
     b)  Press the "Start/Stop" button as illustrated below.
     c)  Re-connect the power cord that you disconnected above and the Bloodhound
          will re-start.

7)  Let the rebooting process complete.  The process of rebooting with the sample line
     disconnected will automatically recalibrate the Bloodhound's vacuum sensor.

8)  Observe what the vacuum is after the reboot and re-calibration.  If it was too high
     or too low before, the issue should be resolved now.  If it is not, proceed to the
     next step.

9)  Check the inner-plumbing of the sample line:
     a)  Open the case of the Bloodhound by removing the four (4) Philips' head screws
          as illustrated below:

     b)  Lift the face of the Bloodhound out and tip it toward the front of the Bloodhound
          (toward the handle).
     c)  Observe the inlet's inner connections, and in particular the inner filter (as shown
          in the following photograph which depicts a filter after 1 year of use.):
     d)  If there are any obvious obstructions in the clear tubing remove them, and you
          can try disconnecting/reconnecting them in order to clear any unseen debris.
     e)  If the filter is clearly dirty, it can be replaced with a common G4164 plastic
          filter, available at most auto parts stores.

10)  After repairs to the inside of the Bloodhound's plumbing, you must again re-calibrate
       the vacuum sensor.  In order to do this, repeat steps 1 through 7 above.

12)  If you are still not able to stabilize the vacuum on open air to an acceptable range,
       the sensor must be repaired at the iBall Instruments shop.  You may choose to run
       a lighter test and/or a trap test, and/or a Chromatograph Lighter Test to determine
       if the Bloodhound is functioning well enough to complete the current logging job.


How to Perform a Basic Lighter Test on the Bloodhound:

How to Perform a Chromatograph Lighter Test on the Bloodhound:

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Last Modified:8/18/2013 4:03:43 PM

Last Modified By: syonker

Type: FIX

Level: Novice

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