Provide Temperature Data For Concentration Measurement - Emerson Micro Motion 5700 Configuration And Use Manual

Configuration and Use Manual
MMI-20025166
Set reference temperature values for specific gravity using the Field
Communicator
When Derived Variable is set to any option based on specific gravity, you must set the reference temperature
for water, then verify the density of water at the configured reference temperature. These values affect
specific gravity measurement.
To check the setting of Derived Variable, choose Configure > Manual Setup > Measurements > Optional
Setup > Conc Measurement > CM Configuration.
Important
Do not change the setting of Derived Variable. If you change the setting of Derived Variable, all existing
concentration matrices will be deleted from transmitter memory.
Procedure
1. Choose Configure > Manual Setup > Measurements > Optional Setup > Concentration Measurement
> Configuration Matrix.
2. Set Matrix Being Configured to the matrix you want to modify.
3. Choose Reference Conditions, then perform the following actions:
a) Set Reference Temperature to the temperature to which line density will be corrected for use in
the specific gravity calculation.
b) Set Water Reference Temperature to the water temperature that will be used in the specific
gravity calculation.
c) Set Water Reference Density to the density of water at the specified reference temperature.
The transmitter automatically calculates the density of water at the specified temperature. The
new value will be displayed the next time that transmitter memory is read. You can enter a
different value if you want to.
Provide temperature data for concentration measurement using the Field
Communicator
The concentration measurement application uses line temperature data in its calculations. You must decide
how to provide this data, then perform the required configuration and setup. Temperature data from the on-
board temperature sensor (RTD) is always available. You can set up an external temperature device and use
external temperature data if you want to.
The temperature setup that you establish here will be used for all concentration measurement matrices on
this meter.
Procedure
1. Choose the method to be used to supply temperature data, and perform the required setup.
Method Description
Internal RTD Temperature data from the on-
temperature data board temperature sensor
(RTD) is used.
Configuration and Use Manual
Configure process measurement applications
Setup
a. Choose Configure > Manual Setup > Measurements >
Optional Setup > External Variables.
b. Set Temperature Compensation to Disable.
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