Stringing 101 Chiho Wang Duke University 1 Technical

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Stringing 101 Chiho Wang Duke University 1 Technical Training May, 2001

Stringing 101 Chiho Wang Duke University 1 Technical Training May, 2001

Stringing Station · What does the tension program do? u u High voltage test

Stringing Station · What does the tension program do? u u High voltage test n All wire must hold 1700 V Measure wire tension n u 135 Hz (55. 5 g) < wire tension < 165 Hz (83 g) Write a wire history file n For future reference in case of problem · The following forms should be in binder during stringing. u u u Stringing rework. xls Straw-wise anomaly. xls Forms can be printed from construction room PC heppc 5 e: heplabforms Chiho Wang Duke University 2 Technical Training May, 2001

HV test · General u u u Both switches on HV power supply should

HV test · General u u u Both switches on HV power supply should be up for operation Current draw limit dial should be on 100 u. A Tension plate should be grounded (if can not ground tension plate, supervisor should be contacted) · When testing many wires (e. g. after stringing) u u Set HV duration to a long time (e. g. 3000 sec) Set straw number “ 0” Record failed channel on log book and rework sheet later for rework. Use <Abort> to turn off HV · When testing a single channel (e. g. during wire rework) u u u Set HV duration to 3 sec (default) Set straw number to the straw being tested Ground both ends of wire then run HV test Chiho Wang Duke University 3 Technical Training May, 2001

Stringing & Tension Measurement · Pulling wire out of spool should be slow and

Stringing & Tension Measurement · Pulling wire out of spool should be slow and eyes on wire. Always minimal handling/contact of wires · Tension plate should be grounded. · Always check that the straw number on screen is the actual straw being worked on. · If small or no peak, try “Low Scan” first · Wire history should be entered in the order of actions taken, and as complete as possible. u e. g. repin, wire broke, wire removed, restrung. . . · Do not hesitate to make a “Other” comment when you see something unusual. · When skipping a straw, also write down straw # and reason of skipping on rework sheet. u Don’t try too hard before skipping a wire during stringing process. Skip the wire before feeling frustrated (~3 tries). String along and keep yourself in good mood! · Use a new rework sheet in every run of rework Chiho Wang Duke University 4 Technical Training May, 2001

About the Log file · M#-*_String. Log_%. csv u u comma delimited (text/excel) file

About the Log file · M#-*_String. Log_%. csv u u comma delimited (text/excel) file in c: userstensiondata or d: … # = module type (usually 2 or 3) * = module number (01 - 35) % = 1 or 2 for station number Chiho Wang Duke University 5 Technical Training May, 2001

About the Log file · The final tension of a wire can be found

About the Log file · The final tension of a wire can be found in M#*_Accepted_%. csv or by finding last “Accepted” in comment in log file · In operation: make a “other” comment when finishing one phase and going into another phase e. g. u end of stringing, start HV test u rework after 16 ch tension test. . etc · Enter operator initial in Alphabetical order separated by “/” if >1 operator e. g. cw/eb · Set straw # = 0 for any log irrelevant tests Chiho Wang Duke University 6 Technical Training May, 2001

Tension program Chiho Wang Duke University 7 Technical Training May, 2001

Tension program Chiho Wang Duke University 7 Technical Training May, 2001