ADS Environmental Services Model 4000 530017 A0 - Manual (Page 101)

Maintenance and Troubleshooting 5-15
Problem Range from the ultrasonic depth subsystem is too short
(but not zero).
Possible
Causes
Electronic or physical offset(s) may be incorrect.
Pipe height may be incorrect.
Ultrasonic depth sensor may be dirty.
Pulse Command and Spare 2 Delay parameters may not
be adjusted properly.
Ultrasonic depth sensor may be faulty.
Possible
Solutions
Verify the electronic and physical offsets.
Verify the pipe height.
Clean the ultrasonic depth sensor.
Verify the pulse command and spare 2 delay
parameters. The pulse command should be 4 for
ultrasonic and 8 for smart depth, and the spare 2 delay
should be 1 for both devices.
Contact a trained ADS technician.
Replace the ultrasonic depth sensor.
Contact your regional ADS representative.