Troubleshooting guide

88
Reference Manual
00809-0100-4308, Rev BA
Section 6: Service and Troubleshooting
December 2014
Service and Troubleshooting
By adjusting the Surface Threshold the product surface is properly detected as illustrated in
Figure 6-6:
Figure 6-6. Echo Curve Plot after Surface Threshold Was Adjusted
Example 2: Interface Peak not found
In interface applications where the bottom product has a relatively low dielectric constant
(<40), or if the signal is attenuated in the upper product, the amplitude of the reflected signal
from the interface is relatively low and difficult for the transmitter to detect. In such a case it
may be possible to detect the reflected signal from the interface if the Interface Threshold is
adjusted.
Figure 6-7 illustrates a situation where the Interface Threshold is too high. The signal amplitude
peak at the interface between the upper and lower products is not detected in this case.
Figure 6-7. Echo Curve Plot Indicating that the Interface Threshold for the Interface Peak Is
Too High
100
80
60
-60
40
-40
20
-20
0
100
50
0
150
200
250
After Surface Threshold is
adjusted the product surface is
correctly detected
AMPLITUDE
DISTANCE
The Interface Threshold is
above the Interface Peak
AMPLITUDE
DISTANCE
Surface Threshold
Product Surface Peak