This page last changed on Jul 11, 2008 by sjensen.

Add seawater sensors at bottom of each oil chamber
Sample tube in bag to ¾ depth
Upper/lower purge may need to wait until, or be moved to after sampling.
May need to add an RO water rinse fluid. (non-toxicant) Verify that air compliance is at right volume.
Also look at cast 17-4 for bell housings.
brent:  One could use a serial port or ethernet for communications to the ESP
brent:  Core must be work from 2C to 35C
gene:  Test urathane bags for oil compatibility
gene:  Pack toxicant bag in PVC or similar hard container
gene:  Don't servo on pressure, just monitor it during decompression
brent:  measure amplitude of sample pump's pressure impulses
brent:  Modify ESP scripts to purge into DWSM before starting sample processing
gene:  Add an external bag for DI Water to mix with toxicant
brent:  Add filter on raw water inhaled into bags when rinsing them
brent:  Measure compliance when filling bells with oil
jon, gene, et al.:  Invert bells when filling with oil
gene:  Dish out top plate to control air bubble size
gene:  consider stainless for casting bell housings
jon:   3 threads on HP oil pump motor housing is bare minimum
gene:  O-ring on HP oil pump motor housing may be damaged on assembly
mike:  put O-ring on inside wall to prevent this  
  Need fuses on power

  •     Yes I do need to add then and I will

Need to add fan for 600W

  •     See last comment in this paragraph

Consider indicator lights

  •      I will consider

Monitor input and output voltages

  •    I need to investigate how to do this within the current hardware

May need to mointor fan operation

  •    consider this

Also, size internal heat fins to hold heat of 1 decomp.  
  Pressure switches, use NC instead of NO since most tend to fail open as opposed to fail closed.

  •    good suggestion, CPLD allows for this change in logic state

Not much margin over 4000m on PT's, check the % over reading capacity.

  •   While we may not be able to read to the actual full depth ocean pressure this is not a big concern as we are mainly concerned that

       we have decompressed to a save level. Since we use a compensation chamber we do not pump to pressure.
Plan to test fault conditions  

Document generated by Confluence on Feb 03, 2026 14:16