- #1
triden
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I have been working on a small project involving temperature measurement in a geothermal installation. I am using constant current sensors (AD592) that will be placed about 100 feet down the holes. I have the circuit designed and the PCB drawn up but I haven't printed it yet. I want to ask you guys about a few final details before I hook it all up.
I'm going to hook the sensors up to cat5 which will run to my measurement board adc to read the temps. The sensors will be encapsulated in a small copper pipe and then filled with potting compound to make them water proof. On the adc input I have a low pass rc filter and +/- rail voltage clamps. I am thinking of maybe putting a TVS on it too for extra protection. Since I don't want my circuit to blow up in the first lightning storm, I was thinking of using shielded cat5 cable for the run to the sensors. If I do this, what would be the best way to terminate the shield? Should I ground it on both ends? This is all kind of new to me and I want to make sure I am not missing anything.
Christan
I'm going to hook the sensors up to cat5 which will run to my measurement board adc to read the temps. The sensors will be encapsulated in a small copper pipe and then filled with potting compound to make them water proof. On the adc input I have a low pass rc filter and +/- rail voltage clamps. I am thinking of maybe putting a TVS on it too for extra protection. Since I don't want my circuit to blow up in the first lightning storm, I was thinking of using shielded cat5 cable for the run to the sensors. If I do this, what would be the best way to terminate the shield? Should I ground it on both ends? This is all kind of new to me and I want to make sure I am not missing anything.
Christan
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