American Magnetics 187 Self-Compensating Liquid Level Controller - Manual (Page 4)

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Table of Contents
Foreword................................................................................... v
Purpose and Scope..................................................................... v
Contents of This Manual .......................................................... v
Applicable Hardware ............................................................... vi
General Precautions................................................................. vi
Cryogen Safety.............................................................. vi
Safety Summary ...................................................................... vii
Recommended Safety Equipment.............................. viii
Safety Legend ............................................................. viii
1 Introduction .............................................................................. 1
1.1 Model 187 Features................................................................... 1
1.1.1 Compensated capacitance-based level sensing ............ 1
1.1.2 Factory calibration ........................................................ 1
1.1.3 Convenient display and direct keypad entry ............... 2
1.1.4 Automatic level control ................................................. 2
1.1.5 Remote computer monitoring or controlled operation. 2
1.2 Front Panel Layout .................................................................. 3
1.3 Rear Panel Layout..................................................................... 4
1.4 System Diagram ....................................................................... 5
1.5 Model 187 Specifications @ 25 °C ............................................. 6
2 Installation ................................................................................ 7
2.1 Unpacking the Instrument ....................................................... 7
2.2 Rack Mounting the Instrument................................................ 8
2.3 Installing the Sensor ................................................................. 8
2.4 Connecting the Model 187 to the Sensor ................................. 9
2.5 Installing the Optional Solenoid-Operated Fill Valve .......... 10
2.6 Connecting the Instrument to Power ..................................... 11
3 Operation ................................................................................ 13
3.1 Operational Guidelines ........................................................... 13
3.1.1 Energizing the instrument.......................................... 13
3.1.2 Selecting the Appropriate Units ................................. 14
3.1.3 Configuring the Length Settings ................................ 14
3.1.4 Configuring the HI and LO Alarms............................ 15
3.1.5 Configuring the A and B Setpoints............................. 15
3.1.6 Selecting the Fill Mode................................................ 16
3.1.7 Configuring the Fill Timer.......................................... 16