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Entry  Mon Dec 17 22:13:03 2018, anchal, DailyProgress, TempCtrl, Proposed circuit for cavity temperature sensor Part 2 Cavity_Temperature_Sensor_Calculations.zipCavTempSensorAcromagChannels.pdf
    Reply  Wed Dec 19 11:01:00 2018, awade, DailyProgress, TempCtrl, Proposed circuit for cavity temperature sensor Part 2 
       Reply  Wed Dec 19 14:00:55 2018, anchal, DailyProgress, TempCtrl, Proposed circuit for cavity temperature sensor Part 2 
Message ID: 2265     Entry time: Mon Dec 17 22:13:03 2018     Reply to this: 2266
Author: anchal 
Type: DailyProgress 
Category: TempCtrl 
Subject: Proposed circuit for cavity temperature sensor Part 2 

The second stage of the amplifier for temperature sensor would be subtractor circuits using OP27G.

  • PFA the circuit schematic consisting of the instrumentation amplifier and different circuits for acromag channels.
  • There would be 1 low-resolution channel with a range from about 15 ^\circ C to 95 ^\circ C with a response: 0.238053435115*T - 13.167938931297705
  • Rest would high-resolution channels with a smaller range. These channels would give us about 1mV/mK slope so that we can read with mK precision with 16 bit \pm 10 V range.
  • Channel 1: From 15 ^\circ C to 35 ^\circ C with a response: 0.952875*T - 22.5
  • Channel 2: From 35  ^\circ C to 55 ^\circ C with a response: 0.943758551683*T - 43.329447115384596
  • Channel 3: From 55  ^\circ C to 75 ^\circ C with a response: 0.955040625*T - 61.9375
  • Channel 4: From 75  ^\circ C to 95 ^\circ C with a response: 0.9429496875*T - 79.74466991341995

I'm attaching calculations done in the jupyter notebook as zip file.


Wed Dec 19 17:13:14 2018

There is an error in this schematic. This is not the final schematic.

Refer this only for the calculations. Use the updated schematic at DCC.

Attachment 1: Cavity_Temperature_Sensor_Calculations.zip  3 kB
Attachment 2: CavTempSensorAcromagChannels.pdf  387 kB  Uploaded Wed Dec 19 17:18:54 2018  | Hide | Hide all
CavTempSensorAcromagChannels.pdf CavTempSensorAcromagChannels.pdf
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