High Voltage - Log - September 2006

09/01/2006

Measuring the current and voltage

Bulk 1:

Target Voltage (V)	Measured Voltage (V)	Bulk Current (uA)	Channel Current (uA)
100	99.5	1.9	0.20
200	199.9	3.3	0.40
300	300.2	4.9	0.60
400	400.5	6.7	0.80
500	499.8	7.5	1.00
600	600.1	9.1	1.21
800	800.6	13.2	1.61
1000	1000.1	14.4	2.02
1200	1200.5	19.0	2.42
1400	1399.9	23.1	2.83
1600	1600.2	26.2	3.24
1800	1799.5	28.8	3.68
1900	1900.5	31.3	3.85
1950	1950.0	32.5	4.02
1980	1978.0	32.5	4.13

• When rumping to 2000V, encountered HV ERROR. Restart the box.
• Continue to measue up to 1978. then error message:

***Error Shutdown***
Error# 221  WatchDog ->
WatchDog Update Timeout
 Start: 04/13/00 10:29:07
   End: 04/13/00 10:33:28

Connection closed by foreign host

Avoid rumping to 1900V.

Testing Bulk 2 (has issue)

Target Voltage (V)	Voltage (V)	Bulk Current (uA)	Channel Current (uA)
100	99.1	2.0	0.43
200	198.3	2.0	0.80
300	298.4	5.2	1.16
400	399.3	7.0	1.52
500	498.5	8.3	1.90
600	598.5	9.7	2.25
800	798.5	13.8	3.01
1000	999.5	16.1	3.72
1200	1199.4	19.6	4.48
1400	1398.5	23.6	5.21
1600	1599.3	26.0	5.97
1700	1699.3	28.2	6.33
1750	1749.2	29.2	6.50
1780	1779.2	29.2	6.59
1790	1789.2	29.2	6.63
1800	1799.2	29.2	6.66
1850	1849.2	30.5	6.88
1880	1880.0	30.5	6.96
1890	1890.0	31.7	7.01
1900	1900.0	31.7	7.03
1950	1949.1	31.7	7.24
1980	1979.4	32.9	7.31
2000	2000.0	32.9	7.38
2100	2099.9	34.3	7.90

• 1800V D400 HVError

It seems that the Bulk current can't exceed 33 uA. Although the Trip current is 2550 uA.

• 2200V D400 HVError Again.

Plot the Current vs. Voltage for bulk 1 and bulk 2

• Next Tuesday, Check the load cable down the pit. If not, make one.

09/06/2006

Change the BNC cable

Ji , Laurel and Xin changed the cable (HV Enable) linking from HVPitEast to HVPitWest. We also changed the TEE connector. After testing with CESR, the East and West are working now.

The left problem is the cable of RICH, which we plan to change next week.

e-log

09/09/2006

Update the detector Map in html

http://www.lns.cornell.edu/restricted/CLEO/RunMgmt/detectors/hv/HVDetectorMap.html

• Create table with all the needed columns

indexNumber DetectorName SubDetectorTag BoxName LogicalUnit Slot Subslot ChannelNumber

Subslot and ChannelNumber

• Get the current Map and ChannelProperties file:

HVConstants.py -a get_latest -o HVChannelProperties,HVNormal_RUN

Write file to: /home/xs32/work/CLEO/service/hv/dat/HVChannelProperties_206_HVNormal_RUN.asc

HVConstants.py -a get_latest -o HVDetectorMap

Write file to: /home/xs32/work/CLEO/service/hv/dat/HVDetectorMap_23_HVNormal.asc

There are two slots corresponding to the LogicalUnitNumber 17:

ChannelProperties.py -a 5

['S9S1', 'S8S1'] Need to understand ...

Translate the map to html first

HVConstants.py -a output_html -o HVDetectorMap_23_HVNormal

Writing to /home/xs32/work/CLEO/service/hv/dat/HVDetectorMap_23_HVNormal.html

The Map Link

Read the manual

Emails about the board diagnosis:

John:

Do you know if the problem is that the individual channel current is
actually increasing (i.e. some type of leakage) or there is an error
in the sense circuitry? I realize the two may be difficult to
distinguish.

Dan:

We're almost certain that the problem is in the sense
circuitry rather than there actually being an increase in the current
draw. Partly this is because there is at least one module where there
is actually a _decrease_ in the current draw per channel although the
total current drawn by the bulk remains the same.

That module is thus rather interesting in that is has one bulk whose
channels appear to be drawing high current and one whose channels
appear to be drawing low current. But the bulks as a whole are drawing
the same current and they're also drawing the same total current as
the third bulk in the module.

I think the first thing we're going to do is try to look over the
schematics and try to figure out where the ADC is that does the
current measurement for the channels and also try to give the board a
general cleaning to see if that does anything at all.

John:

In the Model 1469 High Voltage Module Operator Module the schematic
pages 1469-2N&P show the first part of the sense circuitry. The LM324A
produces a voltage out that is proportional to the current drawn. See
signals IMON0, IMON1, ...

These signals however are floating at high voltage. They go to a
multi-channel ADC (also floating) on sheet 4/4. The ADC has serial
communication through three opto-isolators.

How big are the drifts you are seeing?

• Cleaned the board.

09/12/2006

Look at the relay layout

During the shut down time today, Gary showed me the real layout about the relay circuit in the HVPitWest frame. We also replace the relay part due to a crack on the original one. I'll look at the schematics and ask him for more info if needed.

e-log

09/18/2006

Test the #8 board, bulk 2, still not working

Target Voltage (V)	Bulk Current (uA)/Normal	Channel Current (uA)/Normal
500	7.5 / 7.5	1.93 / 1.00
1000	16.3 / 14.4	3.80 / 2.02
1200	19.7 / 19.0	4.59 / 2.42
1600	25.8 /26.2	6.52 / 3.24

1800 -> Trip

Contact John Dobbins before sending out the board for cutting silgard

09/19/2006

Go through the board with John and have a plan

Measure the cable length of HVEnable for RICH

Update constants

HVTest

HVDetectorMap

• Get the constants

HVConstants.py -a get_latest -o HVDetectorMap,HVTest Write file to: /home/xs32/work/CLEO/service/hv/dat/HVDetectorMap_18_HVTest.asc

• Compare with HVTest_noES6, and HVNormal

HVConstants.py -a get_latest -o HVDetectorMap,HVTest_noES6 Write file to: /home/xs32/work/CLEO/service/hv/dat/HVDetectorMap_19_HVTest_noES6.asc

HVConstants.py -a get_latest -o HVDetectorMap,HVNormal Write file to: /home/xs32/work/CLEO/service/hv/dat/HVDetectorMap_23_HVNormal.asc

• Link Version 23 to tag HVTest

HVChannelProperties

OFF (192)

• Get the constants

HVConstants.py -a get_latest -o HVChannelProperties,HVTest_noES6_OFF Write file to: /home/xs32/work/CLEO/service/hv/dat/HVChannelProperties_192_HVTest_noES6_OFF.asc

• Compare with the Normal one

HVConstants.py -a get_latest -o HVChannelProperties,HVNormal_OFF Write file to: /home/xs32/work/CLEO/service/hv/dat/HVChannelProperties_192_HVNormal_OFF.asc

Same version, just link the 192 to tag HVTest_OFF

FILL (207)

• Get the constants

HVConstants.py -a get_latest -o HVChannelProperties,HVTest_noES6_FILL Write file to: /home/xs32/work/CLEO/service/hv/dat/HVChannelProperties_193_HVTest_noES6_FILL.asc

• Compare with the Normal one

HVConstants.py -a get_latest -o HVChannelProperties,HVNormal_FILL Write file to: /home/xs32/work/CLEO/service/hv/dat/HVChannelProperties_205_HVNormal_FILL.asc

Compare 193 with 205

Make changes:

1289 HVPitWest 1469P1 S4S0 8 1 DV 700 => 0

1301 HVPitWest 1469P1 S4S0 8 1 CE 1   => 0

1347 HVPitWest 1469P1 S4S1 9 8 CE 1   => 0
1348 HVPitWest 1469P1 S4S1 9 9 CE 1   => 0
1349 HVPitWest 1469P1 S4S1 9 10 CE 1  => 0
1350 HVPitWest 1469P1 S4S1 9 11 CE 1  => 0
1351 HVPitWest 1469P1 S4S1 9 12 CE 1  => 0
1352 HVPitWest 1469P1 S4S1 9 13 CE 1  => 0
1353 HVPitWest 1469P1 S4S1 9 14 CE 1  => 0

Save as: /home/xs32/work/CLEO/service/hv/dat/HVChannelProperties_193_new_HVTest_FILL.asc

• Upload with tags

/home/xs32/work/CLEO/service/hv/dat/HVChannelProperties_193_new_HVTest_FILL.asc

HVConstants.py -a upload -o HVChannelProperties,/home/xs32/work/CLEO/service/hv/dat/HVChannelProperties_193_new_HVTest_FILL.asc,xs32,HVTest_FILL

Version 207

RUN (208)

• Get the constants

HVConstants.py -a get_latest -o HVChannelProperties,HVTest_noES6_RUN Write file to: /home/xs32/work/CLEO/service/hv/dat/HVChannelProperties_195_HVTest_noES6_RUN.asc

• Compare with the Normal one

HVConstants.py -a get_latest -o HVChannelProperties,HVNormal_RUN Write file to: /home/xs32/work/CLEO/service/hv/dat/HVChannelProperties_206_HVNormal_RUN.asc

Compare 195 with 206 Make changes:

1289 HVPitWest 1469P1 S4S0 8 1 DV 1000   => 0

1301 HVPitWest 1469P1 S4S0 8 1 CE 1   => 0

1347 HVPitWest 1469P1 S4S1 9 8 CE 1   => 0
1348 HVPitWest 1469P1 S4S1 9 9 CE 1   => 0
1349 HVPitWest 1469P1 S4S1 9 10 CE 1  => 0
1350 HVPitWest 1469P1 S4S1 9 11 CE 1  => 0
1351 HVPitWest 1469P1 S4S1 9 12 CE 1  => 0
1352 HVPitWest 1469P1 S4S1 9 13 CE 1  => 0
1353 HVPitWest 1469P1 S4S1 9 14 CE 1  => 0

Save as: /home/xs32/work/CLEO/service/hv/dat/HVChannelProperties_195_new_HVTest_RUN.asc

• Upload with tags

/home/xs32/work/CLEO/service/hv/dat/HVChannelProperties_195_new_HVTest_RUN.asc

HVConstants.py -a upload -o HVChannelProperties,/home/xs32/work/CLEO/service/hv/dat/HVChannelProperties_195_new_HVTest_RUN.asc,xs32,HVTest_FILL

Version 208

HVStateSettings

• Get the latest one

HVConstants.py -a get_latest -o HVStateSettings,HVTest Write file to: /home/xs32/work/CLEO/service/hv/dat/HVStateSettings_104_HVTest.asc

• Change the StateSettings

1 1 208 1 207 1 192

Save as : /home/xs32/work/CLEO/service/hv/dat/HVStateSettings_104_new_HVTest.asc

• Upload file

HVConstants.py -a upload -o HVStateSettings,/home/xs32/work/CLEO/service/hv/dat/HVStateSettings_104_new_HVTest.asc,xs32,HVTest

Version 114

Done.

09/26/2006

Measure the PHASE3 and PHASE3* of the board

From John's message:

In the Schematic for the HV board, on the page entitled "1469-2N&P",
sheet 1 of 4, in the upper left corner is the circuitry that supplies
power to the channel current sense circuitry that floats at high
voltage.

This is powered by the circuitry shown on drawing entitled "1469-1",
sheet 3 of 10, on the left hand side. This driver can easily be
reproduced so that we can power the floating circuitry with the HV
board disassembled. The only unknown is the frequency of the the
signals named PHASE3 and PHASE3*. However it should be possible to
measure the frequency of these signals on the assembled board while it
is in the crate.

From the schematic Phase3 and phase3* leads to 5/10:

1469-1P -> 5/10 -> U2(MCT540):

_Y7(pin 12) -> PHASE3
_Y8(pin 11) -> PHASE3*

Looking at the real board, the U2 corresponds to 74HCT540N

The measurements are:

• PHASE3: (pin 12)

• PHASE3* (pin 11) has no signal

• I also noticed there are signals on pin-8, and pin-9, looks like this:

• By the way, during the testing, the extension board fried due to unkonwn reason. Probably need to make another one.