Model SMM 770 Scanning Magnetic Microscope System
TRISTAN TECHNOLOGIES --Page
62
7. Appendices
7.1 Thermometry and Cooldown
Table 4
Pt thermometer calibration
Cryocon Model 62 Calibration for SMM 770 Naples
Voltage
Bias Channel
Room
Temperature
(K)
Liquid
Nitrogen (K)
Liquid
Nitrogen (
Ω)
Sensor
Installed Location
10
µ
V
A
293.883
77.46 (+/- 0.005)
19.79 (+/− 0.005)
Pt100/385
Wire Bundle base
10
µ
V
B
293.874
77.51 (+/- 0.03)
19.81 (+/− 0.02)
Pt100/385 Probe
Tip
33
µ
V A
77.406
(+/- 0.001)
19.773 (+/− 0.002)
Pt100/385
Wire Bundle base
33
µ
V
B
77.42 (+/- 0.01)
19.78 (+/− 0.005)
Pt100/385 Probe
Tip
SMM770 Cooldown
75.00
80.00
85.00
90.00
95.00
0:00
1:12
2:24
3:36
4:48
Time (Hours)
Temperature (K)
SQUID Tip
Cu bundle
Figure 7-1
Elapsed time for SQUID tip coldwon to operating temperatures
