Emerson 8800A, Product Manual

Page: 51 / 160

3-3
Operation
DIAGNOSTICS/SERVICE
Use the following functions to verify that the flowmeter is functioning
properly, or when you suspect component failure or a problem with loop
performance, or when instructed to do so as part of a troubleshooting
procedure. Initiate each test with the HART Communicator or other
HART-based communications device.
Test/Status
Under Test/Status choose from View Status or Self Test.
View Status
View Status allows you to view any error messages that may
have occurred.
Self Test
Although the Model 8800C performs continuous self-diagnostics, you
can initiate an immediate diagnostic to check for possible electronics
failure.
Self Test checks proper communications with the transmitter and
provides diagnostic capabilities for transmitter problems. Follow
on-screen instructions if problems are detected, or check the
appropriate appendix for error messages relating to your
communicator.
Loop Test
Loop Test verifies the output of the flowmeter, the integrity of the loop,
and the operation of any recorders or similar devices. Conduct the loop
test after the flowmeter is installed in the field.
If the meter is located in a loop with a control system, the loop will have
to be set to manual control before the loop test is performed.
Verify that the ammeter in the test loop reads 4 mA. If the output is
4 mA, end the loop test. If the output is not 4 mA, the flowmeter may
require a digital trim. If the digital trim does not set the 4 mA output,
the electronics may be malfunctioning.
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.
Flow Simulation
Flow Simulation enables you to check the electronics functionality.
This can be verified with either the Flow Simulation Internal or Flow
Simulation External method.
Flow
Shows the flow value in current engineering units for the flow
simulation.
HART Comm. 1, 2
HART Comm. 1, 2, 1
HART Comm. 1, 2, 1, 1
HART Comm. 1, 2, 1, 2
HART Comm. 1, 2, 2
HART Comm. 1, 2, 3
HART Comm. 1, 2, 4
HART Comm. 1, 2, 4, 1