FMCG/Magnetometer Array Troubleshooting: Difference between revisions
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(Created page with "Here are some tips to troubleshoot common issues with the magnetometer array. =4.5 Hz "square wave" magnetometer signal= This probably means the Tristan SQUID was left powere...") |
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=High 60 Hz noise= |
=High 60 Hz noise= |
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Oh, so, so many things it could be. |
Oh, so, so many things it could be. |
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# Make sure that the two +5 V power supplies (one for the heater fan and the other for the LCD screen) are not touching. I've seen this generate HUGE 60 Hz noise fields |
# Make sure that the cases of the two +5 V power supplies (one for the heater fan and the other for the LCD screen) are not touching. I've seen this generate HUGE 60 Hz noise magnetic fields. |
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# Make sure the Tristan computer (to the left of the desk), Tristan NI chassis (inside of the shielded room), and chassis fan (controlled with the red and black striped power cable plugged into the white surge protector just behind the laptop) are all turned off. If any one of these is still on, again ask Sarah or Bill if it's OK to turn it off. |
# Make sure the Tristan computer (to the left of the desk), Tristan NI chassis (inside of the shielded room), and chassis fan (controlled with the red and black striped power cable plugged into the white surge protector just behind the laptop) are all turned off. If any one of these is still on, again ask Sarah or Bill if it's OK to turn it off. |
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Revision as of 19:27, 25 August 2016
Here are some tips to troubleshoot common issues with the magnetometer array.
4.5 Hz "square wave" magnetometer signal
This probably means the Tristan SQUID was left powered on. That control box is in the setup room on the floor next to the BTi electronics rack. There's a simple on/off switch next to the power cord socket. Make sure to check with one of the SQUID people (Sarah or Bill, most likely) that it's OK to turn it off. Then hit the switch and unplug it for good measure.
High 60 Hz noise
Oh, so, so many things it could be.
- Make sure that the cases of the two +5 V power supplies (one for the heater fan and the other for the LCD screen) are not touching. I've seen this generate HUGE 60 Hz noise magnetic fields.
- Make sure the Tristan computer (to the left of the desk), Tristan NI chassis (inside of the shielded room), and chassis fan (controlled with the red and black striped power cable plugged into the white surge protector just behind the laptop) are all turned off. If any one of these is still on, again ask Sarah or Bill if it's OK to turn it off.