Handbook
November 2011 / 59-UMC0071 / Issue 01
Mercury iTC
Page 8 Original Instructions
14.2 Installing a heater board ................................................................................................ 129
14.2.1 Fitting the board ........................................................................................................... 129
14.2.2 Connecting the heater .................................................................................................. 130
14.2.3 Configuring the heater board ........................................................................................ 130
14.2.4 Configuring the control loop. ........................................................................................ 130
15 AUXILIARY I/O DAUGHTER BOARD ............................................................................. 131
15.1 Description of the auxiliary I/O board ........................................................................... 131
15.1.1 Auxiliary I/O board functions ........................................................................................ 131
15.1.2 Gas-flow control using a motorised needle-valve ......................................................... 131
15.2 Installing an auxiliary I/O board ..................................................................................... 132
15.2.1 Fitting the board ........................................................................................................... 132
15.2.2 Connecting to the auxiliary I/O board ........................................................................... 133
16 LEVEL-METER DAUGHTER BOARD ............................................................................. 135
16.1 Description of the level-meter board ............................................................................ 135
16.1.1 Principles of operation ..................................................................................................135
16.1.1.1 Operation of the board with a helium-level probe..................................................... 135
16.1.1.2 Operation of the board with a nitrogen-level probe .................................................. 136
16.1.1.3 Explanation why different methods are used for the two liquids............................... 136
16.2 Installing the level-meter board ..................................................................................... 136
16.2.1 Fitting the board ........................................................................................................... 136
16.2.2 Connecting the sensor ................................................................................................. 137
16.3 Configuring the level-meter board ................................................................................ 138
16.3.1 Configuring a liquid-helium sensor ............................................................................... 138
16.3.2 Configuring a liquid-nitrogen sensor ............................................................................. 139
16.4 Specification of the level-meter board .......................................................................... 140
17 GPIB DAUGHTER BOARD .............................................................................................. 141
17.1 Description of the GPIB daughter board ...................................................................... 141
17.2 Installing a GPIB board .................................................................................................. 141
17.2.1 Fitting the board ........................................................................................................... 141
17.2.2 Connecting to a GPIB board ........................................................................................ 142
GLOSSARY ....................................................................................................................................... 143
Acronyms and abbreviations.......................................................................................................... 144
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