Proc_Temp_Damp; Vel_Meas_Base; Tc_Failure_Mode; Lfc_Response - Emerson Rosemount 8800D Series Reference Manual

Reference Manual
00809-0100-4772, Rev FA
2.7.17

PROC_TEMP_DAMP

Process Temperature Damping. Only vortex meters with the MTA option measure process
temperature.
The units are seconds, default is 2 seconds. Valid range is 0.4 to 32 seconds.
2.7.18

VEL_MEAS_BASE

Velocity Measurement Base. The velocity calculation can be based on the Mating Pipe inside
diameter or the Meter body inside diameter. Default is the Mating pipe ID.
2.7.19

TC_FAILURE_MODE

Thermocouple Failure Mode. The MTA optioned meters measure process temperature with
a thermocouple. If the thermocouple fails, the transmitter will indicate the failed sensor
input. There are two options available for the transmitter operation after the sensor fails.
Sensor Failure; Status is BAD—Mass Flow measurement status is BAD.
Use Fixed Temp; Status is UNCERTAIN—Mass Flow calculation uses fixed temperature values
when calculating density and status of measurement is UNCERTAIN .
2.7.20

LFC_RESPONSE

Low Flow Cutoff Response. The flow measurement will be 0 when the measured flow is less
than the Low Flow Cutoff.
The transition from the flow measurement down to 0 flow can be Damped or Stepped.
Damped will transition to 0 flow based on the Damping setting.
Stepped will transition to 0 flow as soon as the Low Flow Cutoff activates.
2.7.21

CALC_PROC_DENSITY

Calculated Process Density. The MTA optioned transmitters calculate the density of
Saturated Steam based on the process temperature measurement.
The Calculated Process Density is used to determine the Mass Flow rate of saturated steam.
2.7.22

PROC_TEMP_RANGE

MTA option only. Process Temperature Range.
The process temperature range is the minimum and maximum temperature of the vortex
sensor.
The Units will match the XD_SCALE units of the AI Block assigned to Process Temperature
2.7.23

ELEC_TEMP_RANGE

MTA option only. Electronics Temperature Range.
The electronics temperature range is the minimum and maximum temperature rating for
the electronic components.
Configuration and Operation
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