2-82
1010PVNFM-3A
Section 2
NOTE: If you receive a Detection Fault message, it is strongly recommended that you
contact Technical Service for further orientation.
Using the “F4” Reset Sequence
You may encounter an operating problem that blocks access to the Diagnostics Menu, or
the meter may operate erratically after exposure to a power transient or some other trau-
matic event. These cases may require use of the F4-reset sequence to restore operation.
The F4-reset sequence operates on two levels. The first F4-reset deletes all the data cur-
rently in Active Memory, but leaves Datalogger data and all stored Site Setups intact.
This is the most desirable method since all you have to do to restore operation is reload a
saved Site Setup. If this fails then you have to resort to the second level of the F4 sequence,
which allows you to clear ALL Dynamic Memory. Be aware that this erases all saved Site
Setups (
including flow calibrated sites). Datalogger Data and user-defined pipe and trans-
site setup and transducer installation choices; particularly
data entered for the pipe and liquid.
• In Reflect Mode, the flow computer detects that the pipe wall
signal may infringe upon the liquid signal. Use Direct Mode
instead.
Press <ENT>, <UP Arrow>, <DOWN Arrow>, or <LEFT Arrow> to
abort install routine. Continue programming other site data in antici-
pation of resolving the difficulty later. Call technical support for help if
necessary.
Low Signal- During the Initial Makeup, the meter decides that the level of the
Press [ENT] receive signal is insufficient for proper operation. Some reasons
forlow signal are:
• Invoking [Install Completed?] on an empty pipe.
• Coupling compound insufficient, not applied, or evaporated.
• A disconnected or broken transducer cable.
• You need to condition the pipe at the mounting location.
• Flush out Large air bubbles.
• The Xdcr cables are defective or not connected to the correct
channel.
• The Set Empty routine performed when pipe was NOT
actually empty.
Detection Fault If you locate and correct the improper condition immediately, press
<ENT> to resume the installation procedure. Otherwise, press the
<LEFT Arrow> to abort the installation and conduct a thorough inves-
tigation.
Appears if the meter cannot complete an Initial Makeup. It means that
the pipe and/or liquid conditions do not permit a receive signal that
meets the flow detection standards. The system will not be able to op-
erate. Attempt to improve operating conditions by reinstalling the trans-
ducers at a different spacing offset, or even at a different location on
the pipe. In addition, switching from Reflect to Direct Mount may solve
the problem. However, operation may not be possible if there is poor
liquid or pipe wall sonic conductivity or extreme liquid aeration.
MESSAGE DESCRIPTION
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