Probe Station

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IV and CV measurements in the Liverpool clean room.

Cold IV:

Setup to measure IV PCB's at temperatures below 0°C. This is done by placing the PCB on a holder with a fan in a commercial freezer. The issue with this system is that the freezer has a cooling cycle and the temperature varies a few degrees when not constantly running. The lowest possible temperature is approximately -23°C. To get to lower temperatures and also have a more stable temperature of the device, a new cold IV setup was designed which will be placed in the freezer. The PCB is cooled with a Peltier element. The hot side is connected with a chuck which allows cooling with a liquid (or gas). The PCB is covered with a Perspex box which will be flushed with Nitrogen to prevent condensation.

TCT PID controller: more information about the PID controller

For IV study: glued sensor on PCB, PT1000 glued on sensor, soldered to PCB

• PT1000:
  • Farnell: IST INNOVATIVE SENSOR TECHNOLOGY - P1K0.232.6W.A.010 - SENSOR, PT1000, 600°C, CLASS A £ 7.18 / each (04/11/2014) for IV study
    • Link for calculation

• PCB Connector:
  • RS: SOCKET, IDC, S/RELIEF, 2.54MM, 20WAY £ 0.73 / each (12/01/2015) {10 much cheaper}
  • New Amphenol T821 Series, 2.54mm Pitch 20 Way 2 Row Right Angle PCB Header, Solder Termination, 3A £ 0.68 / each (05/06/2015)

Drawings

Cold IV chuck

Peltier cooled cold IV chuck for PCB; Perspex cover to flush set-up with Nitrogen

Assembled Cold IV setup:

• Chuck.pdf: Cold IV Chuck
  • Chuck.ipt: Cold IV Chuck Autodesk Inventor files
• Cover.pdf: Cold IV Cover
• Plate.pdf: Cold IV Plate
  • Plate.ipt: Cold IV Chuck/Plate Autodesk Inventor files

Storage Box

Perspex storage box for PCB's

IV-Box assembled with PCB's:

• IV-Box.pdf: IV-PCB storage box

Additional equipment

nylon screw and screw insulator (also for TCT setup)

• RS:
  • RS Nylon Screw Insulator, M4, 3mm £ 2.75 / each (bag of 50) (09/01/2015)
  • Plain Nylon Cheese Head Machine Screw, M4 x 20mm £ 6.58 / each (bag of 100) (09/01/2015)
  • 112.7W Peltier Module, 6A, 29.8V £ 55.40 / each (27/11/2014); used by CERN TCT+
  • PWM Programmable PID Controller £ 236.00 / each (31/10/2015)
  • 160W 1 Output Digital Bench Power Supply, 0 to 42V, 0 to 10A £ 212.10 / each (12/01/2015)

Screw types

• • RS Straight Brass Hose Connector, 1/4 in G Male £ 1.565 / 2 (pack of 2) (12/01/2015) alternative for vacuum connector

apt labview vi for IV measurements to controll PID and read temperature

Software

IV/CV standard

V1.3:
standard version
Use LabView 7.1; for newer LabView use new version of programm
Location: C:\ICV_meas_7.1\V1.3_latest\
V1.3.zip: IV programm V1.3

V1.3.2:
fixed bug in programm flow; 'Abort' button in ICV run window; included switch which allows automatic ramp down at end of measurement; automatic save button opens save window after measurement
Location: C:\ICV_meas_11
V1.3.2.zip: IV programm V1.3.2

V1.3.3:
ramp down speed available; current limit now user defined number
Location: C:\ICV_meas_11
V1.3.3.zip: IV programm V1.3.3

Cold IV

Location: C:\ColdIV

V2.1:
fixed bug in programm flow; 'Abort' button in ICV run window; included switch which allows automatic ramp down at end of measurement; automatic save button opens save window after measurement; ramp down speed available for user; additional read Keithley 2000 multimeter (Ohm) to get resistance of PT1000
V2.1.zip: Cold IV V2.1

V2.2:
current limit now user defined number
V2.2.zip: Cold IV V2.2

-- SvenWonsak - 17 Sep 2014