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Reference Manual
IP2048/RM, Rev AA
Section 5: Service and Troubleshooting
February 2015
To change the lost echo time
1. After entering the “Eng” menu (see the note above), press the green button
repeatedly until “LE” is indicated.
2. Press the blue button
to enter the menu for “LE”. The display indicates the present
lost echo time value.
3. If this lost echo time is correct, press the red button
to exit to the menu.
(The menu option “LE” re-appears. To get to the next menu, press
.)
4. Press the blue button
to start the editing mode. The first digit flashes to indicate it
can now be edited.
5. Press the green button
repeatedly to edit the flashing digit.
6. Press the blue button
to move to the next digit. The digit flashes to indicate it can be
edited.
7. Repeat steps (5) and (6) until the last digit is flashing, and edited as required.
8. Press the blue button
to confirm the new value. (The flashing stops).
9. If the new value is correct, press the red button
to save. The display changes to the
next menu option.
10. If the new value is incorrect, press the blue button
to exit to the menu.
11. The menu “LE” re-appears to re-start at step (2) or press
for the next menu.
5.4.4 Setting the dead band
Screen display: dEAd
Factory default value: 0.3 (m)
The dead band is a region below the transmitter face in where no measurements can be made.
This is also known as the Blanking or Blocking zone, and is a feature common to all ultrasonic
level transmitters, with a value dependent upon certain intrinsic properties of the transmitter.
The dead band should not be lower than the factory default minimum value unless advised by
the manufacturer. A higher value may be entered to stop the processing of echoes from false
targets, but real echoes in the dead band will also now be ignored.
Note
This menu option is in the engineering menu “Eng”. See “Accessing the engineering
menu” on page 49 or see Figure C-3 on page 79 for a map of the menu structure.