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NT UF 811 CO GB (c) / March 2014
5.5 NORMAL configuration mode
Comment: This section will be restricted to an explanation of the additional functions of "normal
configuration" compared to "simple configuration". The entire common base already explained in the "simple
configuration" section is not repeated in this section.
5.5.1 "Pipe/fluid settings" menu
1) Memory
The memory is the time, given in seconds, for which the measurement is stored in memory when a
measurement is lost (echo loss).
This storage is used in particular to avoid inopportune actions from the instrumentation and control part of
the installation.
Two situations may arise:
Situation 1: Measurement loss duration less than the
storage time. In this case, the flow meter keeps the last
measurement until a new measurement is valid.
Situation 2: Measurement loss duration greater than the
storage time. The flow meter extends the last
measurement until the time that has passed is longer than
the storage time. The flow measurement is then given as
faulty if there is still no new valid flow measurement.
Flow
Flow storage
Duration of the
measurement loss
Time
Configured
storage time
Flow storage
Flow
Duration of the
measurement
loss
Time
Configured
storage time