Aalborg DPC - Submenu Pulse Output

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A local maintenance push button is available to manually reset the Totalizer in the fi eld
for DPC controllers without the OLED/joystick option. The maintenance push button is
located on the left side of the instrument (see Section 6.5 “Multi-Functional Push-
Button Operation”).
NOTE: If the Totalizer “Lock Reset Function” is enabled, the Reset feature is not
functional and therefore the Totalizer cannot be reset. "Lock Reset Function”
parameter can only be changed manually using supplied "DPCM Confi guration
Utility" software from "Terminal" mode using ASCII "T" command with "L"
argument (see ASCII Command Set in Section 9.2). By default, the Totalizer
“Lock Reset Function” is disabled, but it can be enabled by the user if the
Totalizer reading in the user application must be preserved for the lifetime of
the instrument.
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h) Totalizer Reading Decimal Point (DP) Precision (Numerical Entry)
Sometimes it is convenient to have Totalizer reading decimal point precision much
lower than Flow Rate readings (for example, when the Totalizer accumulates readings
over a long period of time). The “Totalizer DP Precision” parameter allows the user
to decrease the number of digits after the decimal point for Totalizer readings from 0
to -5. For example, if the Flow Reading has precision of 3 digits after the decimal point,
setting the “Totalizer DP Precision” parameter to -2 will result in Totalizer reading
precision of 1 digit after the decimal point. Fewer digits after the decimal point allow
for more digits in front of it. Totalizer reading fi eld has 10 digits.
i) Totalizer Over Limit Action (Tabular entry)
In some applications it may be required to stop gas fl ow when the Totalizer reaches a
preset volume. In this case “Totalizer Over Limit Action” can be activated. This menu
selection has two available options: Disabled and Valve Close. When assigned to
“Valve Close” and he Totalizer reaches a preset volume the instrument control valve
will be de-energized (Closed).
6.4.14 Submenu “Pulse Output”
The fl ow Pulse Output operates independently from the Totalizers and is based on confi gura-
tion settings (see Figure 19) which can provide pulse frequency proportional to instanta-
neous fl uid mass fl ow rate.
The OLED/joystick interface and digital communication interface commands are
provided to:
 Enable/Disable Pulse Output
 Start Pulse Output at a preset fl ow rate (0.0 - 100.0% FS)
 Confi gure Unit/Pulse value (in current engineering units)
 Confi gure Pulse Active On Time (50 - 6553 ms)