Markes International Unity 2 - Default Chapter; Table of Contents

QUI-1057
Page 2
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Contents
1. Preface ................................................................................................. 5
1.1 Notices ............................................................................................ 5
1.2 Warranty .......................................................................................... 5
1.3 Regulatory compliance .................................................................. 5
1.4 Important safety warnings ............................................................. 5
1.4.1 Labels/symbols ................................................................. 6
1.4.2 Mains voltages .................................................................. 6
1.4.3 High temperatures ............................................................ 6
1.4.4 Hydrogen gas safety ......................................................... 7
1.4.5 Cleaning and decontamination ........................................ 7
1.5 Environment operating conditions ................................................ 7
1.5.1 Temperature ...................................................................... 7
1.5.2 Humidity ............................................................................ 7
1.5.3 Altitude .............................................................................. 8
1.6 Technical Specifications ................................................................ 8
1.6.1 Physical properties ........................................................... 8
1.6.2 Electrical properties .......................................................... 8
1.7 Technical support contact details ................................................. 8
2. Instrument familiarisation .................................................................. 9
2.1 Hardware ........................................................................................ 10
2.1.1 Sample tubes .................................................................... 10
2.1.2 Tube desorption oven ....................................................... 10
2.1.3 Tube filters and seals ....................................................... 10
2.1.4 The cold trap ..................................................................... 10
2.1.5 Cold trap cooling and heating .......................................... 10
2.1.6 Trap filters and seals ........................................................ 11
2.1.7 Split filters ......................................................................... 11
2.2 Sequence of operation ................................................................... 12
2.2.1 Standby .............................................................................. 12
2.2.2 Leak test ............................................................................ 13
2.2.3 Prepurge ............................................................................ 14
2.2.4 Primary (tube) desorption ................................................ 15
2.2.5 Pre trap fire purge ............................................................. 16
2.2.6 Secondary (trap) desorption ............................................ 17
2.3 Insertion and removal of a sample tube in UNITY 2 .................... 18
2.3.1 Insertion............................................................................. 18
2.3.2 Removal ............................................................................. 18
2.4 Desorb and split flows .................................................................... 18
2.4.1 Gas flow through the cold trap ........................................ 18