Reference Manual
00809-0100-4004, Rev BA
August 2010
4-11
Rosemount 8800D
For example:
1 pulse = 10 ft. Enter 10 for the distance.
Scaled Mass
This mode allows you to configure the pulse output based on a mass Flow
Rate. If Process Fluid = Tcomp Sat Steam, this is a temperature compensated
mass flow.
Pulse Scaling Rate
Allows the user to set a certain mass Flow Rate to a desired Frequency.
For example:
1000 lbs/hr = 1000HZ
1. Enter a Flow rate of 1000 lbs/hr.
2. Enter a Frequency of 1000HZ.
Pulse Scaling Unit
Allows the user to set one pulse equal to a desired mass.
For example:
1 pulse = 1000lbs.
Enter 1000 for the mass.
Pulse Output Test Pulse Output Test is a fixed frequency mode test that checks the integrity of
the pulse loop. It tests that all connections are good and that pulse output is
running on the loop.
HART Output
Multidrop configuration refers to the connection of several flowmeters to a
single communications transmission line. Communication occurs digitally
between a HART-based communicator or control system and the flowmeters.
Multidrop mode automatically deactivates the analog output of the
flowmeters. Using the HART communications protocol, up to 15 transmitters
can be connected on a single twisted pair of wires or over leased phone lines.
The use of a multidrop installation requires consideration of the update rate
necessary from each transmitter, the combination of transmitter models, and
the length of the transmission line. Multidrop installations are not
recommended where intrinsic safety is a requirement. Communication with
the transmitters can be accomplished with commercially available Bell 202
modems and a host implementing the HART protocol. Each transmitter is
identified by a unique address (1-15) and responds to the commands defined
in the HART protocol.
Field Comm. 1, 4, 2, 2, 1, 5
Field Comm. 1, 4, 2, 2, 1, 5, 1
Field Comm. 1, 4, 2, 2, 1, 5, 2
Field Comm. 1, 4, 2, 2, 2
Field Comm. 1, 4, 2, 3
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