Sumitomo Marathon CP-8 - SENSOR CONNECTORS AND ALTERNATE DATA; COMPRESSOR AND REFRIGERANT QUALITY

Specifications
12
Standard Single Temperature Sensor Connector
The receptacle is a 4 pin, bayonet connector, shell size 10. See Figure 14 for terminal
polarities.
Accuracy: ±2.0 K for 4 K to 25 K, ±5.0 K for 25 K to 450 K
Optional Dual Temperature Sensor Connector (for MCC)
The receptacle is a 10 pin, bayonet connector, shell size 12. See Figure 17 for terminal
polarities.
Accuracy: ±1.0 K for 2 K to 25 K, ±2.0 K for 25 K to 450 K
Alternate Single Silicon Diode Temperature Sensor
With a 10 µA DC current excitation, this alternate encapsulated silicon diode supplied with the
cryopump has the following voltage/temperature characteristics:
Temperature
(K)
Output
(Volts)
Temperature
(K)
Output
(Volts)
10 1.392 24 1.099
12 1.355 40 1.061
14 1.299 60 1.007
16 1.226 80 0.952
18 1.114 100 0.898
20 1.110 200 0.626
22 1.104 300 0.352
Accuracy: ±2.0 K for 16 K to 26 K, ±4.0 K for 26 K to 120 K, ±5.0 K for 120 K to 300 K
Compressor
For Electrical Characteristics, Cooling Requirements, Helium Gas Pressures and other
Compressor characteristics, refer to the Compressor technical manual.
Refrigerant Quality
Refrigerant is 99.995% pure helium gas with a dew point less than -50° C (-58° F) at 2070 kPa
(300 psig).
PRESERVE YOUR WARRANTY. Specifications require the use of 99.995%
pure helium gas. Using a lesser quality of helium can damage the system and
void the warranty.