ULTRA 4 INSTRUCTION MANUAL 
 
188 
CHAPTER 10 TROUBLESHOOTING 
This section describes many common symptoms, with suggestions as to 
what to do.  If the issue persists, please contact your local Pulsar distributor. 
Display blank, transducer not firing. 
Check power supply, voltage selector 
switch and fuse. 
Check wiring to transducer. 
There is a fault with the transducer wiring, 
so check wiring to transducer. 
The transducer has not been able to lock 
on to a target.  Check transducer wiring, 
check P900 status.  Check to see if 
transducer is ‘clicking’, check for any 
obstructions in the application. 
Incorrect reading being displayed 
for current level. 
Measure actual distance from transducer 
head to surface of material. Enter Program 
Mode and directly access P21 (Set 
Distance) type in the measured distance, 
ENTER, ENTER again when prompted, wait 
until SET displayed and return to Run 
Mode, display should now update to 
correct reading.  
Material level is consistently 
incorrect by the same amount. 
Check empty level, (P105) display offset, 
(P802) and measurement offset (P851). 
LED’s change colour at relevant 
relay switch points but relays do 
not change state. 
Check supply to unit and ensure voltage 
selector set to correct position. 
 
If you experience any other issues that are not mentioned in the above 
troubleshooting guide, please contact your local Pulsar distributor for 
further assistance.