Troubleshooting guide

92
Reference Manual
00809-0100-4308, Rev BA
Section 6: Service and Troubleshooting
December 2014
Service and Troubleshooting
To set the Peak Detection Method to Threshold Intersection, do the following:
1. From the Home Screen, go to Service Tools > Echo Tuning > Advanced.
2. Under Peak Detection Method, select Threshold Intersection and then click Send.
3. Run Verify Level to compensate for any offset error (see Figure 6-12) introduced by the
Threshold Intersection method. See “Verify Level” on page 59 for further instructions.
Figure 6-12. Thin Oil Layer on Top of Water, Peak Detection Method Set to Threshold
Intersection
6.5.2 Handling disturbances at the top of the tank
Adjusting the Near Zone Threshold
The Near Zone Threshold is used to filter out disturbing echoes and noises at the top of the tank.
By default, this threshold is automatically calculated by the device, and is sufficient in most
conditions.
However, in the case of unfavorable conditions, you might need to manually set the Near Zone
Threshold. This may for example be the case if a Single Lead probe is mounted in a narrow
nozzle, if the end of the nozzle protrudes into the tank, or if there are disturbing obstacles in the
Near Zone (referred to as the region between 0-3.3 ft (0-1 m) below the Upper Reference Point.
Surface detected at first intersection with
Surface Threshold, even when there is an
oil peak
Surface Threshold
Actual product surface
is ignored
Offset error