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Reference Manual
00809-0100-4860, Rev BC
Appendix C: Electronics verification
January 2013
Electronics verification
C.2 Electronics verification
Electronics functionality can be verified via two different verification methods:
Flow Simulation Mode
Using an External Frequency Generator
Both methods require the use of a Field Communicator or AMS. It is not required to disconnect
the sensor to perform the electronics verification since the transmitter is capable of
disconnecting the sensor signal at the input to the electronics. Should the user choose to
physically disconnect the sensor from the electronics, refer to Replacing the electronics housing
on page 79.
C.2.1 Electronics verification using flow simulation mode
Electronics verification can be done by utilizing the internal flow simulation functionality. This
functionality is available as model option code DS1 at the time of order. The Rosemount 8600D
is capable of simulating either a fixed flow rate or a varying flow rate. The amplitude of the
simulated flow signal is based on the minimum required process density for the given line size
and service type. Either type of simulation (fixed or varying) will effectively disconnect the
Rosemount 8600D sensor from the electronics charge amplifier input (see Figure 5-2 on page
72) and replace it with the simulated flow signal.
C.2.2 Fixed flow rate simulation
The fixed flow simulation signal can be entered in either percent of range or flow rate in the
current engineering units. The resulting flow rate and/or shedding frequency can be
continuously monitored via a Field Communicator or AMS.
C.2.3 Varying flow rate simulation
The profile of the varying flow simulation signal is a repetitive triangular waveform as illustrated
in Figure C-1. The minimum and maximum flowrate can be entered in either percent of range or
entered as a flow rate in the current engineering units. The ramp time can be entered in seconds
from a minimum of 0.6 seconds to a maximum of 34951 seconds. The resulting flow rate and/or
shedding frequency can be continuously monitored via a Field Communicator or AMS.
Note
To manually disconnect the sensor for precautionary measures, see Replacing the electronics
housing on page 79 for details.
Field Comm. 1, 2, 4, 3, 1
Field Comm. 1, 2, 4, 3, 1, 1
Field Comm. 1, 2, 4, 3, 1, 2