Configuration and Use Manual 45
Required Transmitter Configuration
Required Configuration Optional ConfigurationUsing the TransmitterFlowmeter Startup
6.5.1 Configuring the process variable
You can configure the process variable to be reported through the mA output. Table 6-9 lists the
process variables that can be assigned to the mA output.
Note: The process variable assigned to the mA output is always the PV (primary variable) defined for
HART communications. You can specify this process variable either by configuring the mA output or
by configuring the PV (see Section 8.11.7). If you change the process variable assigned to the mA
output, the PV assignment is changed automatically, and vice versa.
6.5.2 Configuring the mA output range (LRV and URV)
The mA output uses a range of 4 to 20 mA to represent the assigned process variable. You must
specify:
• The lower range value (LRV) – the value of the process variable that will be indicated when
the mA output produces 4 mA
• The upper range value (URV) – the value of the process variable that will be indicated when
the mA output produces 20 mA
Enter values in the measurement units that are configured for the assigned process variable (see
Section 6.4).
Note: The URV can be set below the LRV; for example, the URV can be set to 0 and the LRV can be
set to 100.
6.5.3 Configuring the AO cutoff
The AO (analog output) cutoff specifies the lowest mass flow or volume flow value that will be
reported through the mA output. Any mass flow or volume flow values below the AO cutoff will be
reported as zero.
AO cutoff can be configured only if the process variable assigned to the mA output is mass flow or
volume flow. If an mA output has been configured for a process variable other than mass flow or
volume flow, the AO cutoff menu option is not displayed for that output.
Note: For most applications, the default AO cutoff is used. Contact Micro Motion customer support
before changing the AO cutoff.
Table 6-9 mA output process variable assignments
Process variable ProLink II code Communicator code Display code
Mass flow rate Mass Flow Mass flo MFLOW
Volume flow rate Vol Flow Vol flo VFLOW
Gas standard volume flow rate Gas Std Vol Flow Rate Gas vol flo GSV F
Temperature Temp Temp TEMP
External temperature External temperature External temperature EXT T
External pressure External pressure External pres EXT P
Density Density Dens DENS
Drive gain Drive Gain Drive gain DGAIN
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