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ZTKS0243 / Z31993 / 03
Troubleshooting
Continued from page before
Indicator Possible reason Solution By
The zero reading of
the Helium Level
Sensor can not be
adjusted at the
beginning of cooling
down with liquid
helium.
The Helium Level
Sensor is not
connected correctly
with the connector in
the helium flow
system.
Check the connection in the
helium fill-in turret between
Helium Level Sensor and
connector.
Bruker Service
The Helium Level
Sensor is defective.
Check the Helium Level
Sensor with the
0% calibration plug.
Bruker Service
The helium level
does not reach
100% after cooling
down.
Empty transpor-
tation dewar, helium
transfer stopped.
Refill or replace transportation
dewar.
Bruker Service
The Helium Level
Sensor is disturbed
by the transfer line’s
extension piece.
1. Stop the liquid helium
transfer.
2. Remove the transfer line.
3. Measure the helium level
after some minutes
without the transfer line.
Bruker Service
After cooling down
the helium boil off is
higher than specified
(up to 5 times).
Usual behavior.
A few days are
necessary for the
radiation shields and
the insulation to
reach scheduled
temperatures.
Wait a few days and check
helium boil off.
The presence of the current
lead in the current lead turret
during energizing and
shimming helps to cool down
the radiation shield due to
higher helium flow.
Bruker Service
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