ULTRA 4 INSTRUCTION MANUAL 
 
46 
Parameter Defaults 
 
When you first switch the Ultra 4 on, it will be reading the distance from the 
face of the transducer to the surface. It will be indicating in metres, as 
shown on the display. All relays are set OFF. 
The date (P931) and time (P932) in the Ultra 4 were set at the factory, but 
may need checking, and amending if, for example the application is in a time 
zone other than GMT, see relevant parameter listing for full details.  
In some applications, it is easier to empty the vessel, take a reading from 
the Ultra 4 for distance and then setup the empty level to this figure. 
 
Once you are satisfied with the installation, and Ultra 4 is reading what you 
would expect in terms of distance from the face of the transducer to the 
material level, then you can proceed with programming, for the intended 
application. It is sensible to program all the required parameters at the same 
time. The system will be then set-up.  
 
The span is automatically calculated from the empty level, so the empty 
level should be entered first. 
   
Factory Defaults 
When first installing the Ultra 4, or subsequently moving or using the unit 
on  a  new  application,  before  proceeding  to  program  the  unit  for  its 
intended  application  it  is  recommended  that  you  ensure  that  all 
parameters are  at  their default  values  by completing  a Factory  Default 
P930, as described in the relevant unit type parameter guide.