Emerson Rosemount 3812 Installation Manual page 79

Liquid ultrasonic flow meter for direct and remote mount meter electronics
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Installation manual
00825-0100-3812
Procedure
1. Disable the Write Protect switch in the CPU Module to write any of the
2. Click the Setup Units tab to configure the system units (U.S. Customary or
3. Click the Setup Outputs tab to configure the Device Variables Mapping,
4. After all of the data shown below is entered, click Apply to write the
5. Click Setup HART to configure the HART parameters (tag, date, descriptor,
Installation manual
following configuration parameters to your meter.
Metric units), Volume units, Flow rate time units, Velocity units, Pressure
units and Temperature units. Click Apply to write the parameters to the
meter.
Units, Frequency/Digital outputs, Frequency and Digital Outputs 1 and 2,
Analog outputs, Digital Input, Pressure and Temperature.
a. Analog output 1 (HART) - Content (Primary Variable) displays
Uncorrected Flow Rate and is a read only attribute. Configure
Direction (flow), Lower Range value, Upper range value and Alarm
Action and view the HART Parameters Tag, Date, Descriptor, Message,
Final Assembly Number Poll Address, Number of Response
Preambles.
b. Analog Output 2 - Content (Secondary Variable) displays Uncorrected
Flow Rate and has a read only attribute. Configure Direction (flow),
Lower Range value, Upper range value and Alarm Action. Map the
Third and Four variables using the Manual Setup wizard. Selections
include Uncorrected Volume Flow Rate, Pressure and Temperature.
parameters to the meter.
a) Click the Frequency/Digital Outputs tab to configure Frequency/
Digital Output 1, 2 and 3 Source and drive Mode. Select the Source for
each Frequency/Digital output and select the desired drive Mode. The
Mode options are Open Collector which requires an external
excitation voltage and pull-up resistor or TTL mode which outputs a
0-5 VDC signal (each Frequency output has an A and B output phase).
Note
If changes are made to any Source variable on this page, apply the
changes and navigate to the Guided Setup page. Navigate back to the
Manual Setup for the changes to be reflected in other Manual Setup
pages.
b) Click the Frequency and Digital Output 1 tab to configure the
Content, (flow) Direction, Channel B Phase frequency output, Lag
forward, Lead Reverse or Lead Forward, Lag Reverse (Phase B lags
Phase A while reporting forward flow and lead Phase A while
reporting reverse flow or the opposite), Digital Output 1 Channel A
Content and Polarity, Channel B Content and Polarity, Maximum
Frequency, and Lower and Upper Range Units of Measure.
c) Click the Frequency and Digital Output 2 tab and repeat
configure Frequency and Digital Output 2 parameters.
message text, Final Assembly number, Poll address and number of
Configuration
January 2023
Step 3
to
79

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