User`s manual

Lake Shore MTD Series Cryotest System User’s Manual
H-2 Model MTD-260 Cryotest Workstation
H3.0 SPECIFICTIONS
The following are specifications for the Model MTD-260B Cryotest Workstation:
• Lateral displacement when the refrigerator is operating is <0.001 inch with 2 millisecond pulse
width. The expander piston frequency is 2.78 Hertz.
• The cooling capacity is as follows:
At 10 K, the cooling capacity is ≈1.5 watts
At 15 K, the cooling capacity is ≈5.2 watts
At 20 K, the cooling capacity is ≈7.8 watts
.
300
250
200
150
100
50
0
0 30 60 90 120 150 180
Second Stage (DUT)
First Stage (Radiation Shield)
Time (minutes)
Temperature (kelvin)
8 K
C-MTD-H-1.eps
Figure H-1. Typical Model MTD-260B Cool Down Rate (with 68-pin Test Set Installed)