155
Reference Manual
IP2048/RM, Rev AA
Appendix F: Configuring Using HART
January 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
page 128
).
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.
Field Communicator
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.
Mobrey MCU900 Series control unit
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.
Fast Keys
3, 1, 2, 1, 3
Success Rate D912
100 %
EXIT
HELP
(Field Communicator Screen)
Echo Success D912
100%
(Mobrey MCU901 Screen)
Summary of Contents for MSP400RH
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Page 16: ...6 Reference Manual IP2048 RM Rev AA Section 2 Transmitter Overview January 2015 ...
Page 54: ...44 Reference Manual IP2048 RM Rev AA Section 4 Starting up January 2015 ...
Page 80: ...70 Reference Manual IP2048 RM Rev AA Appendix A Reference Data January 2015 ...
Page 84: ...74 Reference Manual IP2048 RM Rev AA Appendix B Product Certifications January 2015 ...
Page 87: ...77 Reference Manual IP2048 RM Rev AA Appendix C Integrated Display Menus January 2015 ...
Page 90: ...80 Reference Manual IP2048 RM Rev AA Appendix C Integrated Display Menus January 2015 ...
Page 98: ...88 Reference Manual IP2048 RM Rev AA Appendix E Field Communicator January 2015 ...