Reference Manual
00809-0100-4841, Rev. AA
May 2007
Rosemount 3490 Series
4-64
About Totalising on
Model 3492
Model 3492 has two independent, internal, 8-digit, totalisers - Totaliser 1 and
Totaliser 2 - which are updated several times per second.
Totaliser 1 is dedicated to totalising the PV value (D800). When the PV value
is a volumetric flow rate (e.g. m3/hour), the totaliser can accumulate this flow,
therefore giving the total volume throughput.
Totaliser 2 operates in the same way as Totaliser 1, but counts the parameter
selected by P536. Parameter P536 offers a choice of PV, SV, TV, and FV.
A Totaliser relay can be configured to output a pulse for each increment (by
one) to the Totaliser 1 or 2 Count parameter. For information on setting up a
relay to output 'totaliser' pulses, see Sections “Relays“ on page 4-40 and
“Totalising examples“ on page 4-68.
NOTE:
For totalising examples, see “Totalising examples“ on page 4-68.
Menu: MAIN MENU / SETUP / [CONTROL UNIT /] OUTPUT / TOTALISER
P530 Total 1 factor (Factor default is 0.0)
One count is added to the Totaliser Count (D828) for a quantity of flow as
defined by this parameter. The unit of measurement for D828 is defined by
parameter P531.
P531 Total 1 units (Factory default is "None")
This parameter defines the units for the Totaliser 1 Count (D828)
When using units of gal (US gallons), an 8-digit totaliser increments rapidly
and rolls over too frequently. To help with this, alternative totaliser units of
galx10, galx100, and galx1000 are available for selection. When these
special units are selected after selecting gal units, the totaliser factor (P530)
is automatically re-scaled by x10, x100, or x1000 depending on the selection.
NOTE:
If requiring Pumped Volume Totalising, see page 4-59.
P532 Total 2 factor (Factor default is 0.0)
One count is added to the Totaliser 2 Count (D829) for a quantity of liquid as
defined by this parameter. The units for D829 is defined by P533.
P533 Total 2 units (Factory default is "None")
This parameter defines the units for the Totaliser 2 Count (D829).
When using units of gal (US gallons), an 8-digit totaliser increments rapidly
and rolls over too frequently. To help with this, alternative totaliser units of
galx10, galx100, and galx1000 are available for selection. When these
special units are selected after selecting gal units, the totaliser factor (P530)
is automatically re-scaled by x10, x100, or x1000 depending on the selection.
NOTE:
If requiring Pumped Volume Totalising, see page 4-59.
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