4-75
1010GCNFM-3C
Section 4
NOTICE: 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 traumatic 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 currently 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 transducer tables. This will require you to completely re-install the system and repeat all
desired default settings, custom pipe tables, etc.
ally. If a problem seems unsolvable, call our Technical Service Department or your local Siemens Repre-
sentative for expert help.
Flow Computer Messages
Certain actions or conditions invoke messages that may appear as a pop-up window, in the right-hand
column of a given menu cell, or the highlighted prompt line at the top of the display screen. The following
is a list of messages that you may encounter along with explanations, and in some cases, a recom-
mended action.
Memory Full! Response to an attempt to save site data, when data memory is full.
Delete an obsolete site or clear Datalogger memory to make room
for the new site setup.
Memory Corrupted! Memory read error occurred while accessing the active site data.
Chan Not Setup Response to an attempt to invoke an operation that requires a chan-
nel to be enabled. Enable the channel:
[Channel SetupÎChannel EnableÎYes]. Note that a channel can-
not be enabled until its transducers are operating.
Clr Active Memory? Response to pressing the F4 key. Use the F4 function to restore op-
eration if a severe event (e.g., a violent power surge) disrupts system
operation.
Clr Saved Data? Response to pressing the F4 key, then selecting [No] for Clr Saved
Data?
<EOT> Response to a request to output datalogger data to the printer or the
Graphics screen when no datalogger data exists. Set up the Datalog-
ger.
No Sites Response to an attempt to recall or delete a site setup when no Sites
are stored.
Not Installed Response to an attempt to access a menu function that is not included.
Detection Fault Press<ENT> Appears if the meter cannot complete an Initial Makeup. It means that
the pipe and/or gas conditions do not permit a receive signal that meets
the flow detection standards. The system will not be able to operate.
Attempt to improve operating conditions by reinstalling the transduc-
ers at a different letter index, 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 gas
or pipe wall sonic conductivity or extreme gas turbulence.
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