VTA
H172203_1_001
181 / 234
16 VTA
16.1
Introduction
VTA is the abbreviation for Variable Temperature System Adapter.
For application specific needs a wide variety of temperature sensors and heater interfaces
must be supported. Some NMR probes need standard thermocouple sensors type-T, others
need PT100 thermistors, some need two sensors etc.
To obtain precise and accurate temperature measurement the analog sensor signal cannot
be carried over long distances or have many connector contacts between sensor and
electronics.
Many NMR users want to work with different NMR probes and therefore must change the
sensor adaptation conveniently.
For every temperature sensor and heater adaptation variant or other accessory device a
tailored VTA is available but only one type of cable connection is needed for probe to console
adaptation. This cable carries wires for digital signals, low-voltage power supply and the
heater power.
The VT Adapters for probe head temperature control:
• Adapt the specific sensor, convert the sensor signal to a digital temperature reading and
transmit this value to the BSMS/2 ELCB.
• Measure the environmental temperature, use this value to compensate the room
temperature dependencies of the specific sensor and transmit the room temperature value
to the BSMS for further elimination of room temperature artefacts.
Heater power and heater safety sensor signals are fed through the VTA for three reasons:
• The heater power and the corresponding regulation sensor are bundled, thus preventing
erroneous usage of a spare sensor for regulation.
• The heater over-temperature sensor can be evaluated.
• The heater current can be filtered close to the probe, suppressing RF noise picked up by
the long cable running from the console to the magnet.
To connect other temperature accessories like chillers, heat exchangers, nitrogen level
measurement, pressure measurement etc. there are dedicated VTAs available. These
accessory adapters are connected through a thinner cable that carries digital signals and low-
voltage power supply only.
16.2
Configurations
The various applications and related VTA variants are presented in the following chapters:
•
•
BSVT and HT Solids Probe (High Temperature) [
•
BSVT and VT Gas Cooling Accessory Adaptation [
•
Summary of Contents for NMR AV4 BSMS System
Page 1: ...BSMS System for AVANCE NEO User Manual Version 001 Innovation with Integrity NMR...
Page 10: ...Contents x H172203_1_001...
Page 22: ...Safety 22 234 H172203_1_001...
Page 26: ...Transport Packaging and Storage 26 234 H172203_1_001...
Page 42: ...Chassis Mainframe 42 234 H172203_1_001...
Page 46: ...Fan Tray 46 234 H172203_1_001...
Page 55: ...ELCB H172203_1_001 55 234 Figure 8 1 ELCB Front Panel with LED s and Connectors...
Page 69: ...ELCB H172203_1_001 69 234 Figure 8 13 Lock RF Boards Diagnostics...
Page 70: ...ELCB 70 234 H172203_1_001...
Page 120: ...L TRX L 19F 120 234 H172203_1_001...
Page 148: ...BSVT Concept 148 234 H172203_1_001...
Page 166: ...SPB 166 234 H172203_1_001...
Page 172: ...VPSB DC and VPSB DC E 172 234 H172203_1_001 Figure 15 3 Block Diagram of the VPSB DC E...
Page 180: ...VPSB DC and VPSB DC E 180 234 H172203_1_001...
Page 187: ...VTA H172203_1_001 187 234 Figure 16 1 VTA Cable Connectors...
Page 193: ...VTA H172203_1_001 193 234 16 7 Ordering Information See Basic BSVT Configuration 124...
Page 194: ...VTA 194 234 H172203_1_001...
Page 200: ...Nitrogen Level Sensor 200 234 H172203_1_001...
Page 204: ...Radiation Shield Temperature Monitoring MAG RS 204 234 H172203_1_001...
Page 208: ...Installation and Initial Commissioning 208 234 H172203_1_001...
Page 210: ...Operation 210 234 H172203_1_001...
Page 216: ...Replacement of Parts 216 234 H172203_1_001...
Page 222: ...Contact 222 234 H172203_1_001...
Page 226: ...List of Figures 226 234 H172203_1_001...
Page 229: ...Glossary H172203_1_001 229 234 Glossary...
Page 230: ...Glossary 230 234 H172203_1_001...
Page 232: ...Index 232 234 H172203_1_001...
Page 233: ...H172203_1_001 233 234...
Page 234: ...Bruker Corporation info bruker com www bruker com Order No H172203...