
Configuration and Use Manual
67
Optional Configuration
Req
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Con
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uration
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Using the
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Req
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Con
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uration
Opt
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Using the
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8.4
Configuring standard volume flow measurement for gas
Special functionality is provided for measuring the standard volume flow of gases.
ProLink II is required to access this functionality. Other tools provide only limited
support:
•
The Communicator cannot be used to configure volume flow meaurement
for gas or to select a standard gas volume flow measurement unit. If standard
gas volume flow measurement has been configured, the Communicator will
display the correct volume flow value, but will display “Unknown
Enumerator” for the units label.
•
The local display cannot be used to change the volume flow type. However,
after the transmitter has been configured for standard gas volume flow
measurement, the display can be used to select a standard gas volume flow
measurement unit.
Standard gas volume flow and liquid volume flow are mutually exclusive settings. When the Vol Flow
Type is set to Std Gas Volume, the units list contains the units that are most frequently used for gas
measurement. If Liquid Volume is configured, gas measurement units are not available.
To configure the transmitter to use gas standard volume flow:
1. Choose
ProLink > Configure > Flow
.
2. Set
Vol Flow Type
to
Std Gas Volume
.
3. Select the measurement unit you want to use from the
Std Gas Vol Flow Units
list. The
default is
SCFM
.
4. Configure the
Std Gas Vol Flow Cutoff
(see Section 8.7). The default is
0
.
You have two choices for entering the
standard density
of the gas you are going to measure (i.e., the
density of the gas at reference conditions):
•
If you know the standard density, you can enter that value in the
Std Gas Density
field. For
optimal standard volume measurement accuracy, be sure the standard density you enter is
correct and fluid composition is stable.
•
If you do
not
know the standard density of the gas, you can use the Gas Wizard (see
Section 8.4.1). The Gas Wizard can calculate the standard density of the gas that you are
measuring.
8.4.1
Using the Gas Wizard
The Gas Wizard is a tool provided in ProLink II for calculating the standard density of the gas that
you are measuring.
To use the Gas Wizard:
1. Choose
ProLink > Configure > Flow
.
2. Click
Gas Wizard
.
3. If your gas is listed in the
Choose Gas
list:
a.
Select the
Choose Gas
radio button.
b.
Select your gas.
• Model 1500 AN
• Model 1700 AN
• Model 1700 IS
• Model 2500 CIO
• Model 2700 AN
• Model 2700 IS
• Model 2700 CIO
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