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<p class="MsoNormal">Danny,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We are awaiting confirmation from you about the changes made to the traveler L2HE-CAV-HELV-LKCHK-R1 (to be renamed L2HE-CLNRM-HELV-LEAK-R1).<o:p></o:p></p>
<p class="MsoNormal">I have attached your and Adam/Gary versions of the traveler.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The differences are notated below:<o:p></o:p></p>
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<p class="MsoNormal"><b>Danny Version<o:p></o:p></b></p>
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<p class="MsoNormal"><b>Adam G / Gary C Version<o:p></o:p></b></p>
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<p class="MsoNormal">Put a leak check bag around entire cavity and seal above 2 phase line explosion bonded joint.<o:p></o:p></p>
<p class="MsoNormal"><span style="color:red">Partially inflate bag with helium and stop flow.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:red">Allow the leak detector the appropriate warmup time.<o:p></o:p></span></p>
<p class="MsoNormal">Start the Labview tracing program to collect the leak check data.<o:p></o:p></p>
<p class="MsoNormal">Do NOT use the zeroing feature on the leak detector during the helium vessel leak check.<o:p></o:p></p>
<p class="MsoNormal">The helium vessel shall be pumped long enough to have a MDL of less than 2E-9 mbar l/s. Pump time will vary depending on how long it takes for the sensitivity to be low enough.<o:p></o:p></p>
<p class="MsoNormal"><span style="color:red">Once the leak rate is indicated below 2e-9 mbar l/s the bag can be filled with helium. Start helium flow into the bag and stop the flow when the bag starts to inflate.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:red">If any leak is indicated at all, the leak checked shall be considered to have failed.<o:p></o:p></span></p>
<p class="MsoNormal">Five minutes after filling the bag with helium, the calibrated leak shall be opened. Allow the trace to run long enough for the helium to settle to a flat line, indicating the leak rate of the calibrated leak.<o:p></o:p></p>
<p class="MsoNormal">Record the size of the leak with the calibrated leak open.<o:p></o:p></p>
<p class="MsoNormal">Record the size of the calibrated leak and the expiration date of the calibration.<o:p></o:p></p>
<p class="MsoNormal">Upload leak check data file and a saved picture of the trace with Cavity ID, total pressure, date, calibrated leak size, and time of helium spray indicated on the picture.
<o:p></o:p></p>
<p class="MsoNormal">Toggle the yes/no button to indicate if the leak rate is acceptable.<o:p></o:p></p>
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<p class="MsoNormal">Put a leak check bag around entire cavity and seal above 2 phase line explosion bonded joint.<o:p></o:p></p>
<p class="MsoNormal"><span style="color:red">Allow the leak detector the appropriate warmup time.<o:p></o:p></span></p>
<p class="MsoNormal">Start the Labview tracing program to collect the leak check data.<o:p></o:p></p>
<p class="MsoNormal">Do NOT use the zeroing feature on the leak detector during the helium vessel leak check.<o:p></o:p></p>
<p class="MsoNormal">The helium vessel shall be pumped long enough to have a MDL of less than 2E-9 mbar l/s. Pump time will vary depending on how long it takes for the sensitivity to be low enough.<o:p></o:p></p>
<p class="MsoNormal"><span style="color:red">Once the leak rate is indicated below 2e-9 mbar l/s flow helium into the bag and stop the flow when bag starts to inflate</span>.<o:p></o:p></p>
<p class="MsoNormal"><span style="color:red">Any detectable leak shall constitute test failure.<o:p></o:p></span></p>
<p class="MsoNormal">Five minutes after filling the bag with helium, the calibrated leak shall be opened. Allow the trace to run long enough for the helium to settle to a flat line, indicating the leak rate of the calibrated leak.<o:p></o:p></p>
<p class="MsoNormal">Record the size of the leak with the calibrated leak open.<o:p></o:p></p>
<p class="MsoNormal">Record the size of the calibrated leak and the expiration date of the calibration.<o:p></o:p></p>
<p class="MsoNormal">Upload leak check data file and a saved picture of the trace with Cavity ID, total pressure, date, calibrated leak size, and time of helium spray indicated on the picture.
<o:p></o:p></p>
<p class="MsoNormal">Toggle the yes/no button to indicate if the leak rate is acceptable.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If you accept the changes made by Adam/Gary, please let us know and we will send for approvals and process asap.<o:p></o:p></p>
<p class="MsoNormal">Thank you for your help.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:14.0pt;color:#201F1E;mso-ligatures:none">Valerie Bookwalter</span><span style="color:#201F1E;mso-ligatures:none"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:14.0pt;color:#201F1E;mso-ligatures:none">Jefferson Lab, SRF Department</span><span style="color:#201F1E;mso-ligatures:none"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:14.0pt;color:#201F1E;mso-ligatures:none">Pansophy Team</span><span style="color:#201F1E;mso-ligatures:none"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:white"><span style="font-size:14.0pt;color:#201F1E;mso-ligatures:none">1-757-269-5802 (OFFICE – currently working offsite)</span><span style="color:#201F1E;mso-ligatures:none"><o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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