Emerson Mobrey MSP400RH and MSP900GH User Manual

IP2048/RM, Rev AA

February 2015

F.4.9

Echo success (D912)

This is a measure of the quality of the echo returned. It is a percentage indicating the success 
rate achieved from the last ten pulse transmissions.

The success rate may fall below 100% due to the effect of extreme surface turbulence or stirrers, 
which might return a surface echo that is then rejected by the transmitter.

A surface echo might be rejected because it is outside the allowed 'window', set-up to establish 
the true liquid level. This rejects invalid readings on the principle that liquid levels do not change 
very quickly (see “Lost Echo Delay” on 

). 

One rejected surface echo causes Echo Success to decrease by 10%, but a subsequent valid 
surface echo increases the percentage by 10%. The transmitter is biased to ignore sudden liquid 
level changes.

To view the echo success:

1.

From the Home screen, select 3: Service Tools.

2.

Select 1: Alerts.

3.

Select 2: Diagnostic Data.

4.

Select 1: Target Data.

5.

Select 3: Success Rate D912.

6.

When finished, press EXIT to exit to the previous menu.

To view the echo success:

1.

From the Main Menu screen, select MONITOR.

2.

Select the transmitter (e.g. “Tx1:MSP400RH”).

3.

Select DIAGNOSTICS

4.

Select Echo Success.

5.

When finished, press the ESC key to exit to the previous menu.

3, 1, 2, 1, 3

Success Rate D912
100 %

Echo Success   D912

           100%