Bruker 600'54 Ascend ULH, User Manual, Page: 46 / 102

46 ZTKS0175 / Z31991 / 03
Troubleshooting
6.2.4 During Energizing and Shimming
Continued on next page
Indicator Possible reason Solution By
The current lead can
not be inserted
completely into the
connector. The connector is
covered with ice
(frozen moisture or
nitrogen ice). Carefully remove the ice with
warm helium gas.
Use the dipstick or the
precooling tube as tubing for
the warm helium gas to
remove small ice spots.
Bruker Service
The shorting plug
was not removed. Remove the shorting plug
with the shorting plug tool. Bruker Service
The orientation of
the current lead is
not correct. Turn the current lead carefully
until it can be inserted
correctly into the connector. Bruker Service
Main coil heater test
fails. Defective Power
Supply. Replace the Power Supply Bruker Service
Connector or cables
defective. Clean connectors or replace
cables if necessary. Bruker Service
Setting of sense
voltage fails. The main coil heater
switch is "OFF".
The main coil switch
is not opened. Switch the main coil heater to
"ON" and check the main coil
heater current to be adjusted
correctly. Bruker Service
The main coil heater
current is not
correct. The main
coil switch is not
opened. Adjust main coil heater
current correctly. Bruker Service
The auxiliary short-
ing plug is inserted in
the current lead
turret by mistake and
makes a short circuit
across the main coil. Remove the auxiliary shorting
plug and insert it in the helium
fill-in turret. Bruker Service
Current lead can not
be removed. The connector is
covered with ice
(frozen moisture or
nitrogen ice). Carefully remove the ice with
warm helium gas over the
helium flow system. Use the
dipstick or the precooling tube
as tubing for the warm helium
gas to remove small ice spots
from the connector. Bruker Service