<html><body><div style="font-family: tahoma,new york,times,serif; font-size: 14pt; color: #009900"><div>but it still begs the question, why didn't we go right off the bat for the lower scale gauge, which brian mentions in in the works.<br></div><div>is it because no one knew that the pressure in the cylinder was going to be a measly 200psi, or is it because it is really not necessary to measure the pressure on the high side, low side suffices.</div><div> which brings up: why isn't the low side reading good enough. This gauge per marc's foto should read down to 1 psi, (brian might argue its not accurate below 5 psi, so? once this pressure drops to 2psi mvt/hall b can swap the cylinder.)<br data-mce-bogus="1"></div><div>also, doesn't the mvt measure the flow. i read 7L/h being touted around, so won't this flow rate drop as the pressure drops?<br data-mce-bogus="1"></div><div>well, on this topic <em>we'll meet again</em> (vera lynn).<br data-mce-bogus="1"></div><div>does anybody round here remember vera lynn?<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div><br></div><hr id="zwchr" data-marker="__DIVIDER__"><div data-marker="__HEADERS__"><b>From: </b>"Brian Eng" <beng@jlab.org><br><b>To: </b>"Amrit Yegneswaran" <yeg@jlab.org><br><b>Cc: </b>"Franck Sabatie" <sabatie@jlab.org>, "guillaume christiaens" <guillaume.christiaens@cea.fr>, "Patrizia Rossi" <rossi@jlab.org>, "Maxime Defurne" <maxime.defurne@cea.fr>, "Nathan Baltzell" <baltzell@jlab.org>, "Wesley Moore" <wmoore@jlab.org>, "Burkert Volker" <burkert@jlab.org>, dsg-mvt@jlab.org<br><b>Sent: </b>Monday, June 12, 2017 1:35:29 PM<br><b>Subject: </b>Re: [Dsg-mvt] Request new manometer for Eel premix gas system + interlock<br></div><div><br></div><div data-marker="__QUOTED_TEXT__">Because of the fitting on the premix cylinders uses the same one as a hydrogen bottle, which can come with much higher pressure. I'm guessing the reverse thread fitting is common on flammable gas bottles?<br><br>Since the MVT is using a custom gas mixture that isn't a particular common one they don't really make regulators for it, at least not off the shelf like the ones we already have.<br><br>Hopefully after the lower scale high pressure side gauge is installed this matter will be put to rest.<br><br>> On Jun 12, 2017, at 1:28 PM, Amrit Yegneswaran <yeg@jlab.org> wrote:<br>> <br>> but why in the world would anyone install or agree to the installation of a 0psi to 4000 psi gauge to measure 200 psi max from the cylinder. might as well measure the volume of the mvt in pc**3 (parsec**3), and conclude it doesn't exist. problem solved.<br></div></div></body></html>