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Message ID: 15     Entry time: Fri Feb 12 11:39:28 2010
Author: Aidan 
Type: Electronics 
Category: Ring Heater 
Subject: Ring heater transfer function 

I applied a step function to the silver WATLOW heater and measured the response with the photodiode. The power spectrum of the derivative of the PD response is attached. The voltage isn't calibrated, but that's okay because right now we're just interested in the shape of the transfer function. It looks like a single pole around 850uHz. The noise floor is too great above 4 or 5 mHz to say anything about the transfer function.



Attachment 1: watlow_heater_transfer_fn.jpg  112 kB  | Hide | Hide all
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