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Open Thermocouple Detector

 
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daqmaster
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Joined: 27 Jun 2005
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PostPosted: Mon Sep 15, 2008 6:59 am    Post subject: Open Thermocouple Detector Reply with quote
The thermocouple provides a short-circuit path for dc around the capacitor, preventing it from charging through the resistors. When the thermo couple opens, due to rough handling or vibration, the capacitor charges and drives the input amplifier to the power supply rails, signaling a failure.

Topic: THERMOCOUPLE MEASUREMENT MISTAKES: How to Combat Noise
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