Operation
Z33119_1_003 33
7.3 Manual Operation Modes BCU I
Rotary switch Operation Notes
The BCU I is controlled by the BSVT (see Remote Operation Modes on BSVT [}33] ) or BVT (see Remote Operation Modes on BVT [}34] )
Flush / 0 * No cooling power This setting is used when VT gas at room temperature has to be fed to the NMR probe or the
VT gas tubing of the BCU I has to be dried and purged. In this setting the compressor is not
running.
Purge with dry clean air or nitrogen gas at room temperature with a dew point temperature ≤
-50°C@1bar
1 * Medium cooling power In this mode, the VT gas is cooled only slightly with reference to room temperature T
RT
(T =
T
RT
0…20°C)
2 * Maximum cooling power In this maximum mode, the VT gas is cooled to the lowest specified temperature.
* ) The BCU I is in a manual mode and cannot be controlled with the BVT or BSVT. In manual mode the BCU I can be operated without a communication
cable to the B(S)VT.
7.4 Remote Operation Modes on BSVT
Rotary switch TopSpin EDTE Operation Notes
Remote Off No cooling power This setting is used when VT gas at room temperature has to be fed to the
NMR probe or the VT gas tubing of the BCU I has to be dried and purged.
In this setting the compressor is not running.
Purge with dry clean air or nitrogen gas at room temperature with a dew
point temperature ≤ -50°C@1bar
Remote Medium Medium cooling power In this mode, the VT gas is cooled only slightly with reference to room
temperature T
RT
(T = T
RT
0…20°C)
Remote Maximum Maximum cooling power In this maximum mode, the VT gas is cooled to the lowest specified
temperature.
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