IMP+ INSTRUCTION MANUAL 
 
18 
CHAPTER 3 HOW TO USE YOUR IMP+ 
Operating the Controls 
Display 
Whilst in the Run Mode, the 4-digit LCD, by default, will display the current 
level reading in metres, the display will also alternate between the reading 
and “LOE” when a fault condition (Loss of Echo) is detected.  When in the 
Program Mode the display is used to read information on the Menu Options 
and the values entered.  
 
There are two operating modes for your IMP Lite, Run Mode and Program 
Mode.  
Run Mode 
This mode is used once the IMP+ has been set up in program mode. It is 
also the default mode that the unit reverts to when it resumes operation 
after a power failure. When the IMP+ is switched on for the first time, it will 
display, in P104 Measurement Units, the distance from the transducer face 
to the target.  
Program Mode 
This mode is used to set up the IMP+ or change information already set, this 
is achieved by using the 4 push buttons located below the display.  
Entering a value for each of the menu options that are relevant to your 
application provides all the programming information.