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6-2-4 Maintenance of Pirani gauge sensor head
(1) Check
item
1)
Pirani gauge sensor head
There is continuity between one pin of A group and one pin of B group in the
figure below (approx. 13 ohms in air).
(2)
How to check
1)
Remove the front panel.
2)
The Pirani gauge sensor head comes in sight. Remove the connector.
3)
Turn the clamp ring to remove it.
4) Pull out the Pirani gauge sensor head. The clamp ring, O-ring seat and O-ring
come out together.
5)
Check and replace the sensor head with a new one.
(The sensor head cannot be reused.)
6)
Reassemble the sensor head by reversing the disassembling procedure.
A GROUP
B GROUP
Summary of Contents for HELIOT 301
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