March 2016
Reference Manual
00809-0100-4772, Rev FA
150
C.2
Electronics verification
Electronics verification is a means to verify the transmitter is operating properly. Using
either an internally generated sine wave signal or an externally supplied sine wave signal,
the transmitter flow measurement can be verified. Electronics verification can be
performed either while the device is online under normal operating conditions or while the
device is offline or on the bench.
The verification procedure requires a F
OUNDATION
Fieldbus-compliant host or Field
communicator. It is not required to physically disconnect the flow sensor during flow
simulation. While in simulation mode, the transmitter is capable of electrically isolating the
sensor signal from the simulation signal.
Note
The flow sensor is not used during flow simulation. It can be left connected to the
transmitter, or if a user chooses can be physically disconnected. To manually disconnect the
sensor for precautionary measures, see
“Replacing the sensor” on page 95
for details.
Electronics verification of the transmitter can be performed by two different methods.
1.
Flow simulation mode—internal signal generator
2.
Flow simulation mode—external signal generator
All flow simulation is controlled inside the transducer block. The control parameters are as
follows:
Simulation Control
Sim Disabled
Sim Internal Generator
Sim External Generator
Simulation Units
Percent Of Range
Engineering Units
Simulation Low Point
Simulation High Point
Simulation Ramp Period
When the transmitter is in flow simulation mode, the Host system will indicate the
following:
In the transducer block under the MODE_BLK parameter, BLOCK_ERR should
indicate SimulationActive.
In the AI block, the OUT parameter should have a STATUS of
Uncertain:SubstituteValue:Constant.
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