Emerson 8800A, Product Manual

Page: 49 / 160

Section
3-1
3 Operation
Review . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-1
Process Variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-1
Diagnostics/Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-3
Basic Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-5
Advanced Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-12
Detailed Set-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-12
The software configuration settings for the Model 8800C can be accessed
through a HART-based communicator or through a control system. The
software functions for the HART Communicator are described in detail
in this section of the manual. It provides an overview and summary of
communicator functions. For more complete instructions, see the
communicator manual.
Before operating the Model 8800C in an actual installation, you should
review all of the factory set configuration data to ensure that they
reflect the current application.
REVIEW
Review the flowmeter configuration parameters set at the factory to
ensure accuracy and compatibility with your particular application
of the flowmeter. Once you have activated the Review function,
scroll through the data list to check each variable in the configuration
data list.
The last step of start-up and commissioning is to check the flowmeter
output to ensure that the flowmeter is operating properly. Model 8800C
digital outputs include: flow rate, flow rate as a percent of range, analog
output, vortex shedding rate, pulse rate, and totalized flow.
PROCESS VARIABLES
The process variables for the Model 8800C provide the flowmeter
output. They measure flow in several ways that reflect your needs and
the configuration of your flowmeter. When commissioning a flowmeter,
review each process variable, its function and output, and take
corrective action if necessary before using the flowmeter in a process
application.
Flow – The actual measured flow rate in the line. On the bench, the PV
value should be zero. Check the units on the PV to make sure they are
configured correctly. If the units format is not correct, refer to PV Units
on page 3-14. Use the Process Variable Units function to select the
units for your application.
Percent of Range – The process variable as a percentage of range
provides a gauge as to where the current flow of the meter is within the
configured range of the flowmeter. For example, the range may be
defined as 0 gal/min to 20 gal/min. If the current flow is 10 gal/min, the
percent of range is 50 percent.
HART Comm. 1, 5
HART Comm. 1, 1