Emerson Rosemount 3490 Series Reference Manual page 126

Getting started
January 2021
Set-up totalizing on the Rosemount 3492
Menu
The Rosemount 3492 has two independent, internal 8-digit totalizers, Totalizer 1 and
Totalizer 2, which are updated several times every second.
Set-up Totalizer 1
Note
The totalizer operates with an input of control unit PV (D800) in units per second. If the PV
is a volumetric flow rate (e.g. m
give the total volume throughput.
Table 4-33: Totalizer 1 Parameters
Parameter
P530
P531
P534
D828
126
SETUP → [CONTROLLER] → OUTPUT → TOTALIZER and
MONITOR → [CONTROLLER] → READINGS → TOTALIZER
3
/hour), the totalizer can accumulate this flow volume and
Description
Total 1 factor One count is added to the Totalizer count (D828) for
a quantity of flow as defined by this parameter. The
unit of measurement for D828 is defined by
parameter P531.
Total 1 units This parameter defines the units for the Totalizer 1
Count (D828).
When using totalizer units of gal, an 8-digit totalizer
increments rapidly and rolls over too frequently. To
help, alternative totalizer units of galx10, galx100,
galx1000, and Mgal are available for selection. When
these special units are selected after selecting gal
units, the totalizer factor (P530) is automatically re-
scaled by x10, x100, x1000, or x1000000 depending
on the selection. Similarly, re-scaling is automatic for
ltrx10, ltrx100, etc. after selecting ltr as totalizer
units.
See Using the App Wizard to set-up a flow
application
x 100 totalizer units are needed.
Pulse Width A Totalizer mode relay is energized for a
programmed duration (P534) each time the
Totalizer count (D828 or D829) is incremented.
P534 controls the pulse width (i.e. the pulse 'on'
time) and is between 10 ms and 2.5 s, changeable in
steps of 10 ms.
Parameter P534 also defines the pulse width for a
Sampler mode relay (see
Totalizer 1 This read-only parameter displays the Totalizer 1
Count. To add this to the Full PV display, see
configuration
for a flow application example where gal
Set-up the relays).
options.
Reference Manual
00809-0100-4841
Factory default
0.0
None
100 ms
N/A
Display
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