Oxford Instruments Cryojet - Table of Contents

Contents
1 Quick User Guide ...................................................................................................... 4
2 Description of the system......................................................................................... 7
2.1 Sample flow unit ........................................................................................ 8
2.2 Shield unit................................................................................................... 8
2.3 Stand ........................................................................................................... 8
2.4 Storage Dewar............................................................................................ 8
2.5 Controller.................................................................................................... 8
3 Unpacking and preparation..................................................................................... 9
3.1 Unpacking the system ................................................................................ 9
3.2 Preparing the system for operation .......................................................... 9
4 Controller ................................................................................................................ 13
4.1 Control of flow rates ................................................................................ 13
4.2 Control of jet temperature ...................................................................... 13
4.3 Default Conditions on Start-up ............................................................... 14
4.4 Low Nitrogen Level Cut-out..................................................................... 14
5 Operation ................................................................................................................ 15
5.1 Suggested operating conditions.............................................................. 15
5.2 Alignment of Nozzle and Use of Alignment Tip .................................... 15
5.3 Filling the dewar....................................................................................... 16
5.4 Using the dipstick to measure the level of liquid nitrogen ................... 16
5.5 Warming up the system ........................................................................... 17
5.6 Evacuating the Outer Vacuum Chamber (OVC)...................................... 18
5.7 Calibration of Sample Temperature........................................................ 19
5.8 Stability ..................................................................................................... 19
5.9 Icing of Crystal Support and Goniometer ............................................... 19
6 Control from a computer ....................................................................................... 20
6.1 RS232 Connection Hardware ................................................................... 20
6.2 GPIB (IEEE-488) Connection Hardware.................................................... 20
6.3 Control Using the Oxford Instruments ObjectBench software
package..................................................................................................... 21
6.3.1 Installation of Cryojet driver in ObjectBench........................ 21
6.3.2 Setting up the Cryojet driver ................................................. 22
6.3.3 Control of the Cryojet ............................................................ 22
6.4 Restoring Standard Calibration Parameters............................................ 23
7 Setting of P, I and D Control Terms ....................................................................... 24
8 Liquid Nitrogen Autofill System............................................................................. 26
8.1 Setting Up the Autofill System ................................................................ 27
8.2 The Solenoid Valve................................................................................... 28
9 Fault finding............................................................................................................ 29
10 Wiring Information................................................................................................. 32
10.1 Shield Unit ................................................................................................ 32