“Update on Software Development for the Thermal Tests” Ioannis Kossyvakis Computer Engineering & Informatics Department University of Patras Greece 12/12/2011

Contents Calibration of temperature sensors Tests at Test Module Requirements Equipment for the test measurements LabVIEW sub-program Tests at Test Module Cooling scheme for Test Module 0 Control Scheme Summary Table Future Tasks

Calibration of temperature sensors Part 1: Calibration of temperature sensors

Requirements a) Acquire values (Ohm) from the temperature sensors (PT100’s for resistance measurement) with reference to temperature from the reference thermometer. b) Based on these values – generation of polynomial coefficients for each PT100 using: f(x) = anxn + an-1xn-1+…+ a2x2 + a1x + a0 (Lagrange aproximation) c) Save polynomials to a database in order to be used in final tests for PT100 data re-calculations.

Equipment for the tests measurements -NI DAQ ( 8 slots ) -NI 9217 (Up to 4 channels for analog input) Temperature sensor Reference thermometer

LabVIEW subprogram (1 of 2)

LabVIEW subprogram (2 of 2) f(x) = a3x3 + a2x2 + a1x + a0

Part 2: Tests at Test Module

Requirements a) Control of the heaters. b) Using the calibration coefficients for polynomials for each PT100 (f(x) = anxn + an-1xn-1+…+ a2x2 + a1x + a0), we can precisely obtain temperatures at needed points of test module during long time tests with heating. All measurements will be logged in result files. c) Management of the control valves (CV1…CV6) according to the temperature sensors (PID algorithm). d) Possibility for manual valves control.

Cooling Scheme for Test Module 0

Data will be logged in result files. Control Scheme NI 9217 CDAQ (8 slots) Temperature from calibrated PT 100 TS SENSORS TS7, TS10, TS13, TS16, TS22, TS28 CDAQ (4 slots) NI 9265 PID CV1…CV6 Data will be logged in result files. Manual CV7 PWM NI 9201 NI 9472 Solid state relay of heaters 1 & 2 HEATERS FT

LabVIEW subprogram (1 of 2)

LabVIEW subprogram (2 of 2)

Summary Table Name Total Comments Picture 29 7 - 1 6 8 2 Temperature Sensors (TS) 29 PT 100  4 - wire resistance measurements Control Valves (CV) 7 - Pressure Regulating Valve (PRV) 1 Fluid Transducer (FT) Hand Valves (HV) 6 Safety Valves (SV) 8 Heaters (HT) 2 Heater control – solid state relay based

Part 3: Future Tasks Perform test measurements of the LabVIEW sub-program for the thermal tests. Possible modifications to the current LabVIEW sub-programs.