ADS Environmental Services Model 3600 530002 A2 - Manual (Page 114)

Troubleshooting 7-7
Problem The raw depth of flow data has a value greater than the pipe diameter.
Possible Cause The pipe is surcharged; the sensor is dirty; or the sensor is faulty.
Solution Verify that the pipe diameter, physical offset, and electronic offset are correct in
QuadraScan’s location information file.
Clean the ultrasonic depth sensor.
If the problem is still unresolved, contact an ADS trained technician for further information
about replacing the ultrasonic sensor.
If the problem is still unresolved, replace the monitor and send the old one to ADS for
service.
Problem The data indicates a surcharged pipe, but the pipe is free flowing.
Possible Cause The sensor is dirty or faulty, or the ultrasonic depth board is faulty.
Solution First, clean the ultrasonic depth sensor.
If the problem is still unresolved, contact an ADS trained technician for further information
about replacing the ultrasonic sensor.
If the problem is still unresolved, replace the monitor and send the old one to ADS for
service.
Problem Readings from the ultrasonic depth subsystem are erratic.
Possible Cause There is noise in the sewer line; the sensor is dirty; the flow is choppy or foamy; the sensor
is not level; or the pulse parameters are set too low for the pipe.
Solution Clean the ultrasonic depth sensor.
Remount the sensor properly. (See Chapter 4, “Ring, Sensor, and Special Installations,” for
installation guidelines.)
Review and adjust the pulse and SP2 parameters.
Problem When the ultrasonic sensor is fired, less than six good readings are obtained.
Possible Cause The ultrasonic sensor may be dirty or faulty. The depth board may be faulty.
Solution Clean the ultrasonic sensor. Repeat the firing to determine if the number of good sensor
pair readings has improved.
If you have less than four good sensor pairs, contact an ADS trained technician for further
information about replacing the ultrasonic sensor.
If the problem persists, replace the monitor and send the old one to ADS for repair.
Problem The ultrasonic sensor reports two abnormal temperatures.
Possible Cause Both temperature sensors are faulty.
The ultrasonic sensor is faulty.
Solution If both temperature readings are abnormal, replace the sensor with a new one and send the
old one to ADS.
If the problem persists, replace the monitor and send the old one to ADS for repair.