Users Manual Part 1

Table 7-1: Echo Peak Types

Type Description

Surface Echo tracked as the current surface echo

Unknown Echo not recognized by the device, which might

interfere with measurement

Suppressed Echoes that are identified but suppressed by the

device

Suppressed (double bounce) Echo managed as a double bounce echo by the

Double Bounce function

Secondary surface Echo tracked as the current secondary surface (if

Double Surface Handling function is enabled)

Tank bottom echo Echo considered as an echo from the tank

bottom

Figure 7-16: Echo Curve with Typical Echo Peaks

meter

0 1 000 2 000 3 000 4 000 5 000 6 000 7 000 mV

0.5

1.0

1.5

2.0

2.5

3.0

3.5

A. Suppressed (dashed line indicates use of false echo suppression)

False echo suppression

C. Unknown

D. Amplitude threshold

E. Surface

Reference Manual Service and troubleshooting

00809-0100-4418

September 2022

Rosemount 3408 Level Transmitter 87