Operation 
34  Rev. D7 Jul 2017  Marathon MM 
7 Operation 
Once  you  have  the  sensor  positioned  and  connected  properly,  the  system  is  ready  for  continuous 
operation. 
The operation of the sensor can be done by means of the built-in control panel in the sensor’s housing 
or by means of the software that came with your sensor. 
7.1 Control Panel 
The  sensor  is  equipped  with  a  control  panel  in  the  sensor’s  housing,  which  has  setting/controlling 
buttons and an LCD display. The panel is used primarily for setting up the instrument and is sealed 
during operation. The buttons and the display are defined in the following sections. 
 
Figure 12: Control Panel 
The sensor has a user interface lockout feature that keeps the unit from being accidentally changed from 
the control panel  (locked by default in multidrop  mode). This lockout mode denies  access to  all the 
adjustable parameters on the control panel. Access to the display modes of the panel while in a locked 
condition is provided. 
7.2 Operation Modes 
When you first turn the unit on, the display shows the current temperature. Pushing the keys of the 
control panel will change the figures on the display as shown in the menu tree below.