Proto DUNE SP Slow control temperature readout setup

Proto. DUNE SP – Slow control temperature readout setup test Giovanna Lehmann – Xavier Pons CERN 12/01/2017 1

CERN temperature readout test setup finished National Instruments USB to PC DAQ device PT 100 Interface and current source generator box 2

Lab. VIEW data acquisition software from the USB National Instruments module 3

Up to 4 PT 100 channels PT 100 signal to National Instruments module 4 wires connections to PT 100 220 Vac or 115 Vac to ± 15 VDC power supply PT 100 current source circuit x 4 Calibrated to 1000 µA with FLUKE 87 4

Start Program Temperatures. Units user defined Data is stored in *. txt excel file Temperature equation coefficient. By default DIN IEC 60751 Choose PT 100 or PT 1000 Choose units Celsius or Kelvin scale Excitation current source 1 m. A. Each temperature point = mean value of 200 samples Readout frequency By default 1000 msec Stop program 5

PT 100 connection Blue I+ White V+ Red of White V- Red of Blue I- 6

Setup repeatability results measuring always a fixed 50. 8 Ω resistor = ± 15 m. K Can be improved with better NI module (awaiting delivery) 150. 133 m. K 150. 106 m. K 7

Question • Where should we send the setup first? • Another option is during the collaboration week we can do the test here at CERN, just we have find a dewar with some cold liquid. But also we’ll need few precise PT 100 (from Lakeshore? ) 8

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Backup slides 10

Requirements - To measure one (maybe 2) temperature gradient monitor. - It means to measure 70 (maybe 140) temperature points per gradient monitor 11

Requirements - To measure one (maybe 2) temperature gradient monitor. - It means to measure 70 (maybe 140) temperature points per gradient monitor - Hawai University plans to use PT-102 / PT-103 high platinum RTD temperature sensors from Lakeshore company. 12

- Temperature readout: Lakeshore temperature monitor type 218 - One Lakeshore temperature monitor 2018 supports 8 RTD temperature sensor readout. - Integration to SC possible via RS-232 - For one temperature gradient (70 temperature sensors) 9 Lakeshore temperature monitor are required. (18 for 2 temperature gradient monitor) - 9 (18) RS-232 ports required to integrate them in the SC. - In addition to the temperature gradient monitor, in the overall detector there are many other temperature sensors, either PT 1000 to be integrated into the SC. 13

RTD PT 100 and PT 1000 temperature sensors readout system directly by SC. Lakeshore sensor are conformance to IEC 751 / DIN 43760 (α = 0. 00385) 14

Lakeshore 218 temperature monitor is conformance to IEC 751 / DIN 43760 (α = 0. 00385) Lakeshore accuracy at 77 K ~ ± 152 m. K 15

IEC 751 / DIN 43760 (α = 0. 00385) 16

CERN proposes to create the own PT 100 and PT 1000 readout electronics for better accuracy and cost. I The proposal consist in creating a individual precise current source for each temperature sensor. Based in the Texas Instruments technical note: http: //www. ti. com/lit/an/sbva 001. pdf http: //www. ti. com/lit/an/sboa 046. pdf This fixed and precise current source is used to excite the RTD PT 100 and PT 1000 The voltage sense of the sensor VM can be read by 16 channel NI 9205 module The readout accuracy is ± 174 µV. At 73 K PT 100 R =18. 52 Ω with 1 m. A current source the voltage VM=18. 52 m. V If include accuracy ± 174 µV → error range between 18. 694 m. V and 18. 346 mv → 18. 694 Ω and 18. 346 Ω → ± 0. 4 K 17

Using the 24 bits NI 9238 c. RIO module considering the ± 0. 07% error At 73 K PT 100 R =18. 52 Ω with 1 m. A current source the voltage VM=18. 52 m. V If include accuracy ± 0. 07% → error range between 18. 5329 m. V and 18. 50703 mv → 18. 5329 Ω and 18. 507 Ω → ± 0. 03 K 18

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