[Dsg-hallb_magnets] Torus Strain Gauge Check

[Nicholas Sandoval]

Thanks Tyler,

It also looks like resetting also fixed another pegged strain gauge that went out at  2:30AM this morning.    (US S4 VS HB3 )  

The noisy SG's also appear to behave now as well.  

Best Regards,
Nick

----- Original Message -----
From: "Tyler Lemon" <tlemon at jlab.org>
To: "Nicholas Sandoval" <sandoval at jlab.org>, "dsg-hallb magnets" <dsg-hallb_magnets at jlab.org>
Sent: Monday, March 27, 2017 11:00:27 AM
Subject: Re: Torus Strain Gauge Check

Hi Nick, 

I checked the strain gauges you mentioned below before resetting the LV cRIO for the 325 K error. My findings are below. 

SG_From_cRIO[60] (SG817D1HB4) : Before the LV cRIO reset, the strain gauge reading was stuck at 43860.7. The high value could be what is causing the DINT value to be maxed out on the PLC. After resetting the LV cRIO, the strain gauge reading changed to 0.0087, which is similar to other SGs in the same LV Chassis. It would be good to watch the strain gauge readings to see if this happens again as it is similar to the Cerenox 325 K error we have. 

SG_From_cRIO[50] (SG817D4HB2) : Could not see anything wrong with data on cRIO. 

SG_From_cRIO[52] (SG817D5HB2): Could not see anything wrong with data on cRIO. 

Even though I could not see anything for the two strain gauges at indexes SG_From_cRIO[50] and SG_From_cRIO[52], resetting the LV cRIO may have also fixed those noise issues. 

Best regards, 
Tyler 




From: "Nicholas Sandoval" <sandoval at jlab.org> 
To: "Tyler Lemon" <tlemon at jlab.org> 
Sent: Friday, March 24, 2017 10:39:19 AM 
Subject: Torus Strain Gauge Check 

Hi Tyler, 

Can you please check out a few strain gauges in the Torus LV cRIO: 

SG_From_cRIO[60] - Maxed out DINT value being sent to PLC, I checked terminal blocks and chassis wiring, found no change. Dropped out on 3/06 @ 3:37AM. 

SG_From_cRIO[50] - Very noisy, I checked terminal blocks and chassis wiring, found no change. Dropped out on 3/08 @ 1:59AM 

SG_From_cRIO[52] - Very noisy, I checked terminal blocks and chassis wiring, found no change. Dropped out on 3/10 @ 7:48AM 

Once you can confirm everything looks OK to/from LV chassis then I will perform some resistance checks of the gauges. 

Thanks and Best Regards, 

Nick