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P809 Fail-safe Time 
In the event of a fail-safe condition the fail-safe timer determines the time 
before fail-safe mode is activated. Default = 2mins 
If the timer activates, the unit goes into  fail-safe, as determined by P808, 
(Display),  P218,  228,  238  (Relays)  and  P840  (mA  Output).  When  this 
happens, you will see the message “Failed Safe!” on the display, along with 
a message explaining why (lost echo or transducer fault, for example) 
When  a  valid  measurement  is  obtained  then  the  display,  relays  and  mA 
output will be restored and the timer is reset. 
Auxiliary 
P810 Units 
This  parameter  determines  whether  the  Measurement  units  (P104)  are 
displayed on the auxiliary line of the display in run mode.  
Measurement units will not be displayed 
Measurement units will be displayed 
 
 
P811 Alarms Messages 
This parameter determines whether notification messages are displayed on 
the auxiliary line of the display in run mode when an alarm relay is switched 
on or off. The message is in the form “Alarm High ON”, where the ‘High’ is 
determined by the setting of the relay Alarm ID (P212, 222, 232). 
Alarm messages will not be displayed 
Alarm messages will be displayed 
 
 
P812 General Control or Pump Messages 
This parameter determines whether notification messages are displayed on 
the auxiliary line of the display in run mode when a pump relay is switched 
on or off. The  message is in the form  “General  1  ON”,  where the  number 
displayed is the number of the relay. 
Pump messages will not be displayed 
Pump messages will be displayed