TABLE OF CONTENTS
1.0 Introduction............................................................................................................................... 1
2.0 Factory Calibrations, Installed Options and Certification.......................................................... 3
3.0 Setup ........................................................................................................................................ 5
3.1 Line Voltage and Fuse .......................................................................................................... 5
3.2 Connecting Sensors.............................................................................................................. 6
3.3 LHe Sensor Calibration......................................................................................................... 8
3.4 LN2Sensor Calibration......................................................................................................... 9
3.5 Factory Calibration .............................................................................................................. 10
3.5.1 Factory Calibration of a Liquid Helium Channel........................................................... 11
3.5.2 Factory Calibration of a Liquid Nitrogen Channel ........................................................ 12
3.5.3 Factory Calibration of the Analog Output Option ......................................................... 13
4.0 Operation and Menus ............................................................................................................. 15
4.1 Liquid Helium Level Monitor Menu Options ........................................................................ 16
4.1.1 Mode............................................................................................................................ 16
4.1.2 Limits............................................................................................................................ 16
4.1.3 Fill ................................................................................................................................ 17
4.1.4 Interval ......................................................................................................................... 17
4.1.5 Units............................................................................................................................. 17
4.1.6 Boost............................................................................................................................ 17
4.1.7 Ports............................................................................................................................. 18
4.1.8 Calibrate....................................................................................................................... 18
4.2 Liquid Nitrogen Level Monitor Menu Options: ..................................................................... 19
4.2.1 Limits............................................................................................................................ 19
4.2.2 Fill ................................................................................................................................ 19
4.2.3 Units............................................................................................................................. 20
4.2.4 Ports............................................................................................................................. 20
4.2.5 Calibrate....................................................................................................................... 20
5.0 Interfacing................................................................................................................................... 21
5.1 RS-232 Computer Interface.................................................................................................... 21
5.2 IEEE-488.2 Computer Interface.......................................................................................... 22
5.3 Analog Output ..................................................................................................................... 22
5.4 Audible Alarm...................................................................................................................... 22
5.5 Automatic Refill ................................................................................................................... 23
