[Dsg-mvt] Question about MFC

[Brian Eng]

Hi Maxime,

While zeroing the MFC certainly wouldn't hurt anything it does involve closing the valves both up and down stream of it in order to do it, which generally isn't something that can be done during normal operations.

Also the Isobutane MFCs didn't seem to drift as much as the Argon ones.

----- Original Message -----
> From: "mdefurne" <mdefurne at jlab.org>
> To: dsg-mvt at jlab.org
> Sent: Thursday, December 7, 2017 9:24:32 AM
> Subject: [Dsg-mvt] Question about MFC

> Hello,
> 
> We were wondering if reseting the zero regularly (or when outside
> temperature is changing by more than 5°C) would solve our issue. In the
> manual of the MFC, they say that you should define the zero for the
> working temperature of the device.
> 
> They also say you are very sensitive to the zero drift at low flow...
> which is our case for isobutane.
> 
> Kind regards
> 
> Maxime