AMI 1700 - Page 5

Rev. 2 iii
Table of Contents
3.10.1 Capacitance Sensor Contamination ..................................................... 34
3.10.2 Resetting the Instrument to Factory Defaults ...................................... 35
3.11 Shutting the Instrument Down .......................................................................... 36
Calibration.................................................................................................... 37
4.1 Setting the System Date and Time.................................................................... 37
4.2 Capacitance-based Level Calibration................................................................ 38
4.2.1 Understanding the Sensor Active Length ............................................ 38
4.2.2 Relationship between Calibration and Sensor Length ......................... 40
4.2.3 Variations in the Dielectric with Changing Density ............................ 40
4.2.4 Capacitance-based Sensor Calibration Methods.................................. 41
4.2.4.1 Selection of Capacitance Sensor Calibration Methods............. 42
4.2.5 Pre-Calibration Procedure.................................................................... 44
4.2.5.1 Enter Capacitance Sensor Information ..................................... 44
4.2.5.2 Performing Loss of Sensor Calibration .................................... 46
4.2.6 Performing an Open Dewar Calibration .............................................. 48
4.2.7 Approximate Calibration...................................................................... 49
4.2.8 Closed Dewar Calibration.................................................................... 53
4.2.8.1 Presetting the maximum and minimum calibration points ....... 53
4.2.8.2 Completing the closed dewar calibration procedure................. 55
Remote Interface Reference....................................................................... 61
5.1 SCPI Command Summary ................................................................................ 61
5.2 SCPI Ethernet Communication......................................................................... 61
5.3 SCPI Serial (RS-232) Communication ............................................................. 62
5.3.1 Serial port connector and cabling......................................................... 62
5.4 Command/return termination characters........................................................... 62
5.5 Command Set Reference................................................................................... 63
5.5.1 Commands for determining the instrument configuration................... 63
5.5.2 Commands for setting the units of measurement................................. 68
5.5.3 Commands for configuring setpoints................................................... 69
5.5.4 Commands for setting the channel identifiers...................................... 72
5.5.5 Commands for making liquid level measurements.............................. 73
5.5.6 Commands for calibrating level sensors .............................................. 74
5.5.7 System Commands............................................................................... 75
5.6 Error Codes ....................................................................................................... 76
Service and Repair ...................................................................................... 79
6.1 Cleaning ............................................................................................................ 79
6.2 User Replaceable Parts...................................................................................... 79