Showed Brad results of rejection ratio test when tuned at 65Hz. He thought the RR was too high at the higher frequencies, and suggested I use an oscilloscope that can compute FFTs to tune the circuit. So, I input the signal in the oscilloscope and set it up to do an FFT, and put a cursor at 65Hz. I then adjusted the circuit until the amplitude of the FFT at 65Hz was at a minimum. I then retook the RR and got a great looking curve. It wasn't as good at low frequencies as the curves I had gotten before, but it was darn good at the higher frequencies.
The 4000A-002 accels arrived back from repairs today. I took a noise floor test with them and got a noise floor of 430uV. The spec says 500uV so these are working great now.
I set up a little for the temperature test on the 4000As and 4002M1s.
Talked to Will Meenan about the Kaman probes. He found out that the Kaman probes with CSAIDs 2001 and 2002 came calibrated from the factory with a +/-5V span, which is not how they typically are made. Usually they only have a +/-2.5V span. This interesting tidbit aside, he told me to try swapping the broken capacitor for the one that is in the demo electronics he sent. I did this and it still does not work.
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