Emerson Daniel 3415 Operation Manual page 88

Configurations
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Set Baseline parameters
Select the direction to baseline and what data to use to perform the baseline. The wizard
will step you through setting a baseline in one direction.
It is necessary to baseline the meter in both directions if the meter will be operating in a
bi-directional application. For meters only operating in a uni-directional application, the
meter only needs one baseline. The status message displayed on the Meter monitor screen
about the baseline not being set can simply be acknowledged to clear the alarm for a flow
direction you do not want to baseline
Setting baselines in two directions is only necessary if the meter is installed in a bi-
directional application. Flow through the meter in one direction can be quite different
from flow through a meter in the opposite direction. This could be because of flow
conditioners, thermowells, or elbows.
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Configure the local display
Configure the parameters for the local display. Use the drop-down arrow in the Display
Items list box and select or modify the parameters that will be displayed; the Display items,
the Display units and the Scroll delay.
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Flow limits - low and high flow velocity limits.
SOS comparison (requires AGA 8 Detail method to be used) - compares the meter
average speed of sound to the AGA 10 calculated speed of sound.
Liquid detection - identifies when liquids may be present in the bottom of the meter
run base on the meter's flow characteristics.
Abnormal profile - identifies if the meter flow profile has shifted from the original
baseline profile of the meter.
Blockage - identifies a possible blockage of an upstream flow conditioner.
Internal bore buildup - indicates that the flow characteristics have changed
indicating a build up on the internal bore of the meter.
Select baseline flow direction - forward or reverse
Select baseline data source
- 1-minute averages from the meter - the preferred option when setting the
baseline for a new meter. The meter must be under typical flowing conditions
when the baseline is set.
- Maintenance log - if the meter has already been installed in the field for a period
of time and a Daniel MeterLink maintenance log is available from the initial
startup that was taken during normal flowing conditions.
- Manual entry - manually enter data for each of the parameters. This could be
used to modify a single parameter for a baseline already set or it could be to
enter data from a historical record from when the meter was first put into
service.
3410 Series Gas Ultrasonic Flow meters