Emerson Micro Motion LNG Series, Руководство по конфигурации и использованию

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Base Time Unit is the existing time unit that the special unit will be based on.
3. Calculate Mass Flow Conversion Factor as follows:
a. x base units = y special units
b.
Mass Flow Conversion Factor
= x ÷ y
The original mass flow rate value is divided by this value.
4. Enter Mass Flow Conversion Factor .
5. Set
Mass Flow Label
to the name you want to use for the mass flow unit.
6. Set
Mass Total Label
to the name you want to use for the mass total and mass
inventory unit.
The special measurement unit is stored in the transmitter. You can configure the
transmitter to use the special measurement unit at any time. You must use ProLink III to
select the special measurement unit.
Example: Defining a special measurement unit for mass flow
You want to measure mass flow in ounces per second (oz/sec).
1. Set
Base Mass Unit
to
Pounds
(lb).
2. Set
Base Time Unit
to
Seconds
(sec).
3. Calculate Mass Flow Conversion Factor :
a. 1 lb/sec = 16 oz/sec
b.
Mass Flow Conversion Factor = 1 ÷ 16 = 0.0625
4. Set
Mass Flow Conversion Factor
to
0.0625
.
5. Set
Mass Flow Label
to
oz/sec
.
6. Set
Mass Total Label
to
oz
.
4.1.2 Configure Flow Damping
ProLink III
Device Tools
>
Configuration
>
Process Measurement
>
Flow
Overview
Damping is used to smooth out small, rapid fluctuations in process measurement.
Damping
Value
specifies the time period (in seconds) over which the transmitter will spread changes
in the process variable. At the end of the interval, the internal value will reflect 63% of the
change in the actual measured value.
Procedure
Set
Flow Damping
to the value you want to use.
The default value is 0.64 seconds. The range is 0 to 60 seconds.
Configure process measurement
Configuration and Use Manual 19