SPB
156 / 234 H172203_1_001
Connectors
Label Description Note
HELIUM LEVEL Connector for helium level sensor
NITROGEN
LEVEL
Connector for analog nitrogen level sensor SPB-E only
SAMPLE
CHANGER
External sample lift control.
SAMPLE
CONTROL
Signals from BST (upper light barrier,
sample down sensor and tube version)
AUX Auxiliary bus connector for BSMS/2 VT
adapters, digital nitrogen level sensor or
future use of other accessories
SPB-E only
VPSB CTRL 2 Control signals for BSMS/2 Variable Power
Supply Board (VPSB)
Digital signalling is with LVDS at 10MBit/s
SPB-E only
VPSB CTRL 1 Control signals for BSMS/2 Variable Power
Supply Board (VPSB)
Digital signalling is with LVDS at 10MBit/s
Table14.3: Connectors
Connectors are protected against short-circuiting. Nevertheless, ensure correct wiring.
14.5 Function Description
14.5.1 Liquid Helium Level Measurement
For monitoring the He level, a He level sensor is inserted into the top of the helium dewar.
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General