Contents 
Chapter 1  Start Here….........................................................................................................................................1 
About this Manual........................................................................................................................................... 1 
About the IMP+ Level Monitoring System ......................................................................................................2 
Functional Description ............................................................................................................................ 2 
Product Specification.......................................................................................................................................4 
Physical .................................................................................................................................................... 4 
Environmental.......................................................................................................................................... 4 
Performance............................................................................................................................................. 4 
Standard features......................................................................................................................................4 
Additional features - 3wires. ...................................................................................................................4 
PC interface.............................................................................................................................................. 4 
Chapter 2  Installation............................................................................................................................................5 
Power Supply Requirements........................................................................................................................... 5 
Terminal Connections...................................................................................................................................11 
2 Wire.....................................................................................................................................................11 
Loop Resistance.....................................................................................................................................11 
3 Wire.....................................................................................................................................................12 
Preparation for Operation..............................................................................................................................12 
Maintenance...................................................................................................................................................13 
Chapter 3  How To Use Your IMP+ Level Monitoring System.........................................................................14 
Operating the Controls..................................................................................................................................14 
Display...................................................................................................................................................14 
Run Mode ..............................................................................................................................................14 
Program Mode.......................................................................................................................................15 
Button Functions....................................................................................................................................15 
How to Access Program Mode.....................................................................................................................16 
Parameter Defaults ........................................................................................................................................17 
Factory Defaults.....................................................................................................................................17 
Chapter 4  Getting Results With Your IMP+ .......................................................................................................18 
Setting up Your Application .........................................................................................................................18 
Empty Distance......................................................................................................................................18 
Span........................................................................................................................................................18 
Near and Far Blanking ..........................................................................................................................18 
Using the 4-20 mA Output............................................................................................................................18 
Using the Relays............................................................................................................................................19 
Alarm Relay Set-up...............................................................................................................................20 
Control Relay Set-up.............................................................................................................................21 
Loss of Echo Set-up...............................................................................................................................21 
Other Relay Parameters.........................................................................................................................22 
Setting Security Passcodes............................................................................................................................22 
Using A Passcode..................................................................................................................................22 
Changing The Passcode ........................................................................................................................23 
Resetting Factory Defaults............................................................................................................................23 
Checking the Information Specific to your IMP+ ..........................................................................................23 
Checking the Software Revision and Serial Number ..........................................................................23 
Using the RS232 Serial Interface..................................................................................................................23 
Chapter 5  Parameter Guide................................................................................................................................25 
Parameter Listing...........................................................................................................................................25 
Application (APP) Menu ..............................................................................................................................25