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Entry  Wed Jan 24 13:55:04 2018, Kira, Summary, PEM, Seismometer can insulation test 6x
    Reply  Thu Jan 25 12:41:18 2018, Kira, Update, PEM, Seismometer can insulation test 
       Reply  Thu Jan 25 14:58:20 2018, Kira, Update, PEM, Seismometer can insulation test 
          Reply  Thu Jan 25 16:39:09 2018, Kira, Update, PEM, Seismometer can insulation test HeaterTest.png
             Reply  Thu Feb 1 16:09:13 2018, Kira, Update, PEM, Seismometer can insulation test cooling_fit.png
                Reply  Mon Feb 5 12:12:41 2018, Kira, Update, PEM, Seismometer can insulation test temp_data.py
                   Reply  Wed Feb 7 12:35:56 2018, Kira, Update, PEM, Seismometer can insulation test fit_1.png
                      Reply  Wed Feb 7 17:01:25 2018, gautam, Update, PEM, PID test plan ADC_EX.pngDAC_EX.pngIMG_20180207_170628.jpgdac_adc.jpgIMG_20180207_165833.jpg
                         Reply  Wed Feb 7 19:14:19 2018, rana, Update, PEM, PID test plan 
                            Reply  Thu Feb 8 12:24:37 2018, Kira, Update, PEM, PID test plan 
                               Reply  Thu Feb 8 17:32:44 2018, Kira, Update, PEM, PID test plan IMG_20180208_171423.jpgIMG_20180208_172107.jpgIMG_20180208_171853.jpgIMG_20180208_171932.jpg
                                  Reply  Fri Feb 9 15:29:32 2018, Kira, Update, PEM, PID test plan IMG_20180209_152158.jpg
                               Reply  Thu Feb 15 16:03:57 2018, Kira, Update, PEM, PID test plan 
                               Reply  Thu Feb 22 16:16:43 2018, Kira, Update, PEM, temp sensor input IMG_20180222_160602.jpg
                                  Reply  Mon Feb 26 16:22:10 2018, Kira, Update, PEM, temp sensor input 1.jpgIMG_20180226_154649.jpgIMG_20180226_154720.jpg
                                     Reply  Wed Feb 28 12:31:28 2018, Kira, Update, PEM, temp sensor input 
                                        Reply  Fri Mar 9 12:59:53 2018, Kira, Update, PEM, ADC noise measurement IMG_20180309_114345.jpgIMG_20180309_125153.jpg
                               Reply  Mon Mar 26 16:10:33 2018, Kira, Update, PEM, final setup sketch heater_1_new.pngheater_2_new.pngHeaterCircuit.pdftemp_sensor.png
                                  Reply  Wed Apr 18 12:18:39 2018, Kira, Update, PEM, final setup sketch 7x
                                     Reply  Wed Apr 18 16:59:35 2018, rana, Update, PEM, final setup sketch: EX Seis Screen_Shot_2018-04-18_at_5.20.53_PM.png
                                        Reply  Thu Apr 19 11:29:11 2018, rana, Update, PEM, PID tune Screen_Shot_2018-04-19_at_11.27.08_AM.png
                                           Reply  Mon Apr 23 20:06:35 2018, rana, Update, PEM, PID tune HeaterTest.png
                                              Reply  Thu Apr 26 19:46:26 2018, rana, Update, PEM, PID Quixote dv.pdf
                                                 Reply  Tue May 1 11:15:19 2018, Kira, Update, PEM, PID Quixote IMG_20180501_154826.jpg
                                                    Reply  Tue May 1 15:23:18 2018, Kira, Update, PEM, new ADC channel setup issue IMG_20180501_152014.jpg
                                        Reply  Thu Apr 19 12:23:30 2018, Kira, Update, PEM, final setup sketch update heater_1_new.pngheater_2_new.png
                                           Reply  Thu Apr 19 18:23:51 2018, Kira, Update, PEM, final setup sketch update 
                                              Reply  Fri Apr 20 15:07:45 2018, Kira, Update, PEM, final setup sketch update 
                                           Reply  Thu May 24 16:08:12 2018, Kira, Update, PEM, parts list front_panels.zip
                                              Reply  Tue May 29 16:22:43 2018, Kira, Update, PEM, parts list parts_list_-_Sheet1.pdf1U-panel-2.fpdEX-can-panel.fpd
                                                 Reply  Wed Jun 6 15:12:29 2018, Kira, Update, PEM, parts from lab IMG_20180606_141149.jpgIMG_20180606_141851.jpgIMG_20180606_141912.jpg
                                                    Reply  Mon Jun 18 11:12:23 2018, Kira, Summary, PEM, finishing up work at the lab IMG_20180618_101640.jpgIMG_20180618_093920.jpgIMG_20180618_093932.jpg
                                     Reply  Tue Apr 24 09:10:20 2018, Kira, Update, PEM, final setup sketch EX-can-panel_1.pdf
                                        Reply  Mon Apr 30 15:36:18 2018, Kira, Update, PEM, final setup sketch mount.png
                                           Reply  Tue May 8 10:24:10 2018, Kira, Summary, PEM, plan for this week 
                                              Reply  Fri May 11 11:47:33 2018, johannes, Summary, PEM, Acromag issues 
                                                 Reply  Tue May 15 15:13:23 2018, Kira, Summary, PEM, Acromag issues 
                         Reply  Thu Mar 15 17:33:56 2018, Kira, Update, PEM, test setup IMG_20180315_172512.jpg
                            Reply  Tue Mar 20 16:56:01 2018, Kira, Update, PEM, test setup IMG_20180320_154516.jpgIMG_20180320_145957.jpg
                               Reply  Tue Mar 20 19:48:10 2018, gautam, Update, PEM, test setup 
                               Reply  Fri Mar 23 12:00:20 2018, rana, Update, PEM, test setup 
                               Reply  Fri Mar 23 12:45:08 2018, Kira, Update, PEM, test setup seis_fit.png
                            Reply  Thu May 17 15:38:19 2018, Kira, Update, PEM, test setup with seismometer IMG_20180517_144420.jpgIMG_20180517_145754.jpgIMG_20180517_151956.jpgIMG_20180517_145121.jpg
                               Reply  Fri May 18 14:33:34 2018, Kira, Update, PEM, test setup with seismometer seis_temp_can_on.png
                                  Reply  Mon May 21 14:17:28 2018, Kira, Update, PEM, test setup with seismometer seis-temp.png
                                     Reply  Tue May 22 14:49:03 2018, Kira, Update, PEM, test setup with seismometer seis-temp-2.png
                                        Reply  Wed May 23 14:50:33 2018, Kira, Update, PEM, test setup with seismometer seis-temp-3.pngseis-temp-full-2.png
                                           Reply  Thu May 24 15:18:12 2018, Kira, Update, PEM, PID loop restarted 
                                           Reply  Thu May 31 15:48:16 2018, Kira, Update, PEM, running PID script with seismometer can-on-pid.png
                               Reply  Mon May 21 10:15:35 2018, gautam, Update, PEM, test setup with seismometer 
    Reply  Wed Feb 28 21:14:34 2018, gautam, Summary, PEM, Channel admin tempSensData.png
       Reply  Tue Mar 27 11:11:16 2018, Kira, Update, PEM, Channel setup 
          Reply  Thu Mar 29 17:14:42 2018, Kira, Update, PEM, PID test PID_test.png
             Reply  Fri Mar 30 06:16:45 2018, rana, Update, PEM, PID test 
                Reply  Fri Mar 30 16:10:46 2018, Kira, Update, PEM, PID test 
                   Reply  Wed Apr 4 16:23:10 2018, Kira, Update, PEM, PID test step_response.pngcapacitor.jpgIMG_20180412_120427.jpg
                      Reply  Fri Apr 6 16:17:20 2018, Kira, Update, PEM, PID tuning PID_tuning_progress.png
                         Reply  Fri Apr 6 18:28:57 2018, rana, Update, PEM, PID tuning HeaterTest.png
          Reply  Mon Apr 9 16:30:21 2018, Kira, Update, PEM, MEDM setup MEDM_screen.png
             Reply  Tue Apr 10 15:42:08 2018, Kira, Update, PEM, MEDM setup MEDM_2.png
                Reply  Thu Apr 12 10:15:33 2018, Kira, Update, PEM, MEDM setup MEDM_3.png
                   Reply  Fri Apr 13 00:20:46 2018, rana, Update, PEM, MEDM setup 
Message ID: 13691     Entry time: Tue Mar 20 16:56:01 2018     In reply to: 13684     Reply to this: 13692   13700   13701
Author: Kira 
Type: Update 
Category: PEM 
Subject: test setup 

The MOSFET was getting pretty hot, so I switched it out to a larger heat sink and it's fine now. I then used a function generator in place of the DAC to provide ~3.5V. I got the current in the circuit to 1.7A, which is as expected, since we have 24V input, the heater resistance is 12.5ohm and the resistor we are using is 1ohm, so 24V/(12.5+1)ohm = 1.7A. The temperature inside the can rose about 5 degrees in half an hour. The only issue now is the voltage regulators and OP amp inside the box get hot, though it doesn't seem to be dangerous. I switched the function generator input to a DAC and Gautam set it to 1.5V. If it works, then we'll leave this on overnight and work on the PID control tomorrow. I've attached images of the current heater circuit box when it is open and the new heat sink for the MOSFET.


gautam: we also tried incorporating the EPICS channels from the Acromag into the RTCDS so that we can implement PID control by using Foton. I tried doing this using the "EpicsIn" and "EpicsOut" blocks from CDS_PARTS. While the model recompiled smoothly, I saw no signals in the filter module i had connected in series with the EpicsIn block. So I just reverted c1pem to its original state and recompiled the model. Guess we will stick to python script PID reading EPICS channels to implement the PID servo.

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