OPERATION MANUAL Sumitomo Heavy Industries, Ltd.
SRDK Series CRYOCOOLER 7
INSPECTION
INSPECTION
“IMPORTANT”
If any irrecoverable damage is found by a test at the time of reception of the equipment described in this
service manual, please contact Sumitomo Heavy Industries.
The Cryocooler Model SRDK Series should be thoroughly inspected for evidence of damage upon receipt.
Proceed as follows to unpack and check the shipping damages as soon as you receive it.
1） Inspect the outside of each shipping container for visible damage. If you will be making a damage
claim, keep the shipping container, packing materials.
2） Carefully unpack the Cold Head, Compressor Unit, Flex Lines and Cables and inspect them for
damage.
COLD HEAD
Inspect the exterior of the Cold Head for evidence of damage.
(a) Overall exterior.
(b) Bent or dent of cylinder.
(c) Mounting flange and its sealing surfaces.
COMPRESSOR UNIT
The compressor should not be tilted by more than 30 degree at any time. Tilting the Compressor Unit
upside down causes damage of compressor capsule or oil contamination of the Helium gas line.
Inspect the exterior of the Compressor Unit for evidence of damage.
(a) Overall exterior.
(b) Oil leakage.
(c) Filling pressure.
The pressure gauge will be indicated 1.60 - 1.65 MPa (16.3 - 16.8 kgf/cm
2
G, 232 -239 psig) minimum at
20 deg.C (68 deg.F). If the gauge indicates less than 1.60 MPa (16.3 kgf/cm
2
G, 232 psig), refill Helium
gas as described in “TECHNICAL INSTRUCTION” of Compressor Unit used. If the gauge indicates 0
MPa (0 kgf/cm
2
G, 0 psig), there is a risk of helium contamination and Compressor Unit must be
replaced.
FLEX LINES AND ELECTRICAL CABLES
Inspect the Flex Lines for evidence of damage. Do not bend the Flex Line to less than a 300 mm (11.81
inch) radius or damage may occur. Also, avoid twisting the Flex Line when making final connections.
Inspect the Cold Head Power Cable and Input Power Cable for evidence of damage.
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