900612 ESP -- SURF Center : 25Jun2009

This page last changed on Jun 26, 2009 by jbirch.

Present: Wayne, Cheri, Kevin, Jim, Doug, Scott, Chris S

CBV/AIV line length is incorrect and must be changed on Betty and Gordon. Was changed on Moe, but core function never checked afterward. This issue still needs to be checked on NEO.
Currently:
- Gordon--has MFB attached but MFB running as a stand-alone. Easy to merge when ready but currently Monika using MFB and core can be run seperately.
- Betty--needs thermal calibration. Much discussion about appropriate cold test to do, and idea is to go to -5C, after blowing all fluid out of Burkerts with dry N2. Idea is to test hand, carosel, clamps, elevator, but NOT run vlaves or syringes.
- Eventually Betty needs extended chemistry tests at 2C. To do this we need to build larger box (rectangle) to accomodate MFB on the core. This box must have access door.
- MOE--needs rectangle box, because Julie is ready for cold testing of PCR. Moe also needs temp calibration.

John Dzenitis (LLNL) is on vacation until 6-30. After that they will deliver 5 modules (7-6). Must confirm with them our total order of 12 modules with 8 spare heater elements.

Wayne taking a class at UC-B and has small class project. He is developing a Dwarf replacement; worried about power consumption, but looks like it may be only 20-30% higher than current dwarf, but with much more memory space. Wayne will talk to Scott and Brent about specifics, but class project is a go.
Brent going to move the GUI branch onto the main branch, and then put the GUI code onto Gordon for exercise.
Some concern as to why AIV calibration always seems to be 180degrees off. Brent wants to understand this and is on his to-do list.
Syringe/sign inversion
- very difficult to duplicate in the lab so it's hard to study. One idea is that a bit gets set wrong that determines polarity. We currently don't have a way to query bit-state. We could take existing dwarf code and add debug ability, and it may let us see what's going on. Much discussion about what re-writing CPLD code and/or dwarf code might entail. Could be a time-sink; Scott/Brent/Wayne will get together on it.
- Discussion on whether we can have an error check/recovery that fixes this when it happens. Difficult, but Scott/Brent/Wayne to discuss.

Benthos modem issue. Boards ordered to replicate Hans Thomas' junction box will not work with the newer Benthos Universal Deck box. Jim working with Hans and Benthos to see if there is an electronic solution to problem.
GG is going into ball to allow DWSM testing.
Drop Wt--finished designing mechanism, and will wait on manufacture/mounting.
Acoustic modem--not needed on MARS
Toxicant bag--low on priority list for MARS deployment
DWSM
- pressure transducers
  - a few will do simultaneous analog and serial output
  - must work to 2C, but most are not super cold-rated
  - Doug needs to know how we will read them. Talk to Scott
  - pricey ($2500/ea)
  - still getting lead times
- PISSER
  - schematic has been revised. Doug wants it reviewed before starts building.
- Overpressure valves
  - how will we read the contacts from the these valves?
  - will change current overpressure valves to larger ones we have on-hand.