Difference between revisions of "Cryogen Liquid Level Monitors"
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The liquid nitrogen level meter probe is a Magnex Scientific E5031. The probe is a continuous analog readout of the liquid nitrogen level. The active sensor area of the probe is approximately 1 meter. Read-out of the probe is done via a "hockey-puck" like attachment that screws into the top of the ~1m long probe rod. The probe is calibrated using a combination of a Zero offset adjustment on the hockey-puck and Gain adjustment on the back of the analog read-out. Typically the meter is calibrated using a known liquid level. The ammonia sample dewar is a good place to calibrate the liquid level if you think it is off. We usually only use the meter as a rough estimate of the liquid level so the calibration doesn't have to be super precise. | The liquid nitrogen level meter probe is a Magnex Scientific E5031. The probe is a continuous analog readout of the liquid nitrogen level. The active sensor area of the probe is approximately 1 meter. Read-out of the probe is done via a "hockey-puck" like attachment that screws into the top of the ~1m long probe rod. The probe is calibrated using a combination of a Zero offset adjustment on the hockey-puck and Gain adjustment on the back of the analog read-out. Typically the meter is calibrated using a known liquid level. The ammonia sample dewar is a good place to calibrate the liquid level if you think it is off. We usually only use the meter as a rough estimate of the liquid level so the calibration doesn't have to be super precise. | ||
| + | Description of images (starting top left and working clockwise): | ||
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| + | Front of the Magnex Scientific LN2 Liquid Level and AMI Model 135 Liquid Helium Level Monitor. We currently do not use the Magnex E5011 Monitor. | ||
[[Image:FrontofLevelMeters.jpg|400px]] [[Image:BackofLevelMeters.jpg|400px]] [[Image:HockeyPuck.jpg|400px]] | [[Image:FrontofLevelMeters.jpg|400px]] [[Image:BackofLevelMeters.jpg|400px]] [[Image:HockeyPuck.jpg|400px]] | ||
Revision as of 15:41, 27 January 2017
LN2 Level Meter:
The liquid nitrogen level meter probe is a Magnex Scientific E5031. The probe is a continuous analog readout of the liquid nitrogen level. The active sensor area of the probe is approximately 1 meter. Read-out of the probe is done via a "hockey-puck" like attachment that screws into the top of the ~1m long probe rod. The probe is calibrated using a combination of a Zero offset adjustment on the hockey-puck and Gain adjustment on the back of the analog read-out. Typically the meter is calibrated using a known liquid level. The ammonia sample dewar is a good place to calibrate the liquid level if you think it is off. We usually only use the meter as a rough estimate of the liquid level so the calibration doesn't have to be super precise.
Description of images (starting top left and working clockwise):
Front of the Magnex Scientific LN2 Liquid Level and AMI Model 135 Liquid Helium Level Monitor. We currently do not use the Magnex E5011 Monitor.
