IMP+ INSTRUCTION MANUAL 
 
32 
P213 (Relay 1), P223 (Relay 2) - Relay “ON” Setpoint  
This parameter determines the “ON” point for the alarm and should be set 
as follows, in Measurement Units P104  
 
 
 
P214 (Relay 1), P224 (Relay 2) - Relay “OFF” Setpoint  
This parameter determines the “OFF” point for the alarm and should be set 
as follows, in Measurement Units P104  
 
 
 
LOE (Loss Of Echo)) 
No setpoints are required when relays are used as LOE (Loss Of Echo) 
Control 
P210 (Relay 1), P220 (Relay 2) =2 (Control) 
P211 (Relay 1), P221 (Relay 2) - Relay Function 
This parameter defines whether the general control relay function is 
currently “ON” or “OFF”. 
Control is based on the level in the vessel. All 
general controls are used to assist each other (run 
at the same time) and each general control has its 
own “ON” and “OFF” setpoints.