Testing Procedures

The following steps are used to test the critical current of the MSP-3 probe

A. Remove probe from holder

B. Use Lead 10-60/40 solder with a rosin core to secure samples in respective positions

C. Record data needed as File Data for each sample

D. Place probe vertically in dewar

- Caution – Allow for 1 Kelvin/second cool down rate.

- The probe has to be cooled from 289 K to 4.2 K

E. Place recorded data in corresponding File Data folder of LabView

F. Connect voltage with quick-connect set-up

G. Choose Power On in LabView

- The power button should be green

H. Switch current from off to on position

I. Wait approximately five seconds

J. Choose Run in LabVIEW

K. A graph of volts/cm vs. current will be displayed.

L. Once the graph shows a voltage reading the sample is finished.

M. Select Stop in LabVIEW

N. Repeat procedures C-K for all eight samples

O. After testing of final sample select Power off in LabVIEW

P. Remove probe from dewar

- Caution – Allow for 1 Kelvin/Second heating rate.

- The probe has to be heated from 4.2 K to 289 K.

Q. Remove samples from probe

R. Replace probe to respective holding position.