TODO

Check conditions (strip charts) for GMB
Measure distance for new gas lines, give estimate to Henry to buy tubing
Get scalars map to Nick (need file from David with even/odd strips per FEC)
HV error not propogated upward if cylinder HV is off
Put labels on gas lines (input and output with both chambers)
Check HVG 81:16 Chamber 30 it is always reading zero
Run new gas lines to new bubbler units

3-27-03 M. Simani Connected HV to chamber 35 (by mistake, should be unplugged) during access. Chamber 35 is Inner4=Sector 10, Layer 2, Module 3.

11-14-02 DMW  Contacted Ping to replce suspect GMB bad, connected to:
crate pod
  1   21 HVG 49  2.2 1.7 2.2 1.0 2.0 1.5   barrel HV 7600
  1   29 HVG 50  1.2 1.5 0   0   0   0     barrel HV 7600
  1   39 HVG 51  0   0   0   0   1.0 1.0   cyl    HV 6800


11-13-02 DMW, MCS: 

Labelled HV cables from iRPCs. Found label error, chamber 33
was labelled 3, fixed the label.
Found and fixed HV cable swap in HVG45 (ch13 and ch15 were swapped).
Checked GMBs are readout correctly. Find that all 6 channels of 
HVG51:12-17 are dead
Put mineral oil in output bubbler, now depth of less than 5mm, was
below top of bubbler hole. All output lines are bubbling.


4-4-01 Doug Wright
PEP having  ROD (Repair Opportunity Day)

Problem: BB01 black ground wire was pulled out (i.e. not connected to ground.)
Fixed:   Crimped terminal to loose wire (wire-nutted to bundle)
         connected to ground bus bar

BB01 HV connections did not match the list taped to the
inside of the box. I left the connections as they were (see below)

Checked HV connections, they are as follows
  BB07 BF05 BB01       BF11  BB11  BF01
          actual (map)
1  20   X    X   (26)   39    4      15
2  16   X   26   (12)    3    6       5
3   X   7   24   (24)    X   38      19
4   X  33   12    (X)   31   32       1*
5  22* 29*  30   (30)   21   18      17
6  34  27*   8    (8)    9   10      13
NC          36   (36)   35

(map) = order expected from map taped to the inside of the box
NC=Not connected
*=blue gunk (corrosion?) on female pins (plexy-box side)

9-20-00 Doug Wright

After doors closed:
1. checked bubblers, all OK
2. Checked plexy box in BF01 (for Chamber 17) connectors
   and box looked ok, could not remove plexy box from Al coffin

Checked bubbler output box
Both forward endcap doors open, only east door on backward was open.

1. No oil in top window, so no bubbles
2. Added 1/4 of oil, everything bubbles
3. Moved chamber 36 output from connector T to J (see bubblermap.txt)
4. All chambers bubbling
5. Measured flow on a few output channels:
   ch5-6     8  1/2 cc/min
   ch13-38   7  1/2 cc/min
   ch35-36  10  1/2 cc/min

6. Note the pressure caused by the height of the oil in the bubbler
results in stored energy in the RPC/tubing system. The flow meter has
almost no back-pressure, so when you first connect the chamber to the
flow meter, the chamber "exhale" with a high flow rate for a while and
eventually plateau to a low flow rate.
  

8-7-00 David Lange

bubbler measurements

Here are my measurements using Jim's device.  I have no clue
what the units are - but the error is certainly 1-2 counts.
The numbers are (and were expected to be) small.

Chamber #    Output flow      Input flow (I didn't measure all of these)
     
5-6 		7		5                       	
17-18		7		8
27-20		10		7
7-16		6
29-22		9
33-34		9
13-38		9
1-10		8
19-4		8
15-32		8
31-8		7
3-12		8
9-26		11
21-30		6
39-24		9
35-36		0		7

So - I conclude:
1- All flows are basically the same, except
2- the output flow from chambers 35 and 36 is 0 - I guess this
is why the chambers have never worked??  I would propose for the
next forward/backward door opening that we splice the gas lines
close to the input/output to the detector to confirm that the 
block in the flow is somewhere close to the chambers, or if it
is in the tubing outside the detector.  Given that neither 35 or
36 work, this could be either completely unrelated, or the
problem is on the input side.