Batch Cycle Processing; Table 4-1 Actual Meter Update Period - Emerson Daniel 3410 Series Operation Manual

3410 Series Gas Ultrasonic Meters Operations Manual
3-9000-777 Rev E
4.2.3

Batch cycle processing

Batch update period
Calculation updates performed by the meter, for deriving volume and velocity, are based on
batches of data samples collected from sequences of transducer firings. The batch update
period is dependent upon the user specified batch update period (
stack size (
actual batch update period is readable via the

Table 4-1 Actual meter update period

Emission rates
The emission rate is the period between firing two different transducers. The stacked emission
rate is the period between consecutive firings of a single transducer when stacking is used (i.e.,
the stack size is not set to None).
The actual emission rates used (readable via the
points) are functions of the desired emission rates, meter type, firing sequence, stack size, and
pipe diameter.
The user specifies the desired emission rates via the
data points. If a desired emission rate is set to zero, the meter uses the fastest possible emission
rate which can be as short as is 2 milliseconds. Otherwise, the meter uses the fastest possible
emission rate that is not less than the desired value. We recommend setting the Filter to the OFF
position.
The
Signal Analyzer
RateDesired.
update.
Batch cycle processing
) as shown in Table
StackSize
Stacksize
1 (None)
Rapid 0.25 sec
(250 ms)
Standard 1 sec
(1000 ms)
(
Meter|Signal Analyzer
These values are set to zero to achieve the most transducer firings per batch
4-1. The Standard batch update period is the default. The
BatchUpdatePeriod
2 4
N/A N/A
1 sec 1.5 sec
and
EmRateActual
EmRateDesired
) is used to configure the
Section 4: Flow measurement
January 2018
) and the
SpecBatchUpdtPeriod
data point.
8 16
N/A N/A
3 sec 5 sec
data
StackEmRateActual
and
StackEmRateDesired
and
EmRateDesired StackEm-
21