EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: mimmus78 on October 10, 2016, 10:29:00 pm
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I'm doing some experiments with warm-up times of some measurement instruments I have.
Thought it was nice to share with you some results.
First instrument is a TE9823 multifunction calibrator. This calibrator was a bit a surprise to me, I never expected this almost first class calibrator (10ppm maybe/wannabe) to take 3 hours to warm-up. This calibrator do not use ovenized references so it take a lot of time for the reference to get to temperature. Still to be proven that is the reference "drifting" and not the DAC or maybe a combination of the two.
Next instrument is a K2001, this takes just 30 minutes to be ready ... this meter is using an LM399 an ovenized reference that go to temperature in a couple of minutes. It should be something else in the reference buffering circuit causing this drift (or some thermal emf?).
In next days I will than test a K2000 too and a old and venerable Solartron 7150.
Here first two shots.
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K2000 warm-up temperature was constant to all warm-up period.
Also source voltage was measured constant according to mi K2001.
This is the fastest meter to warm-up, it settle to -2ppm than it final value in just few minutes.
Simple is better!
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Neat. Thanks for sharing these, mimmus.