Endress+Hauser Proline Prowirl 73 - Gas Mixture Functions

Proline Prowirl 73 Description of device functions
Endress+Hauser 159
11.17 GAS MIXTURE
Function description, GAS MIXTURE group
Prerequisite
The function is only available if GAS MIXTURE was selected in the SELECT FLUID function (ä 143).
Description
• Use this function to program a gas mixture consisting of a maximum of 8 individual gas constituents.
• General rules:
– At the start, select the number of constituents.
– The constituents entered for the gas mixture must have 100.00 Mol-% (=Vol-%) altogether.
– A gas and its corresponding Vol-% value can be entered in any order.
– If a certain gas is not listed, you can do either of the following:
– Program the gas using the real gas equation
– Enter the Vol.-% part with the gas type OTHER as well as the following functions: 
OPERATING-Z-FACTOR (OTHER) (ä 151), REFERENCE-Z-FACTOR (OTHER) (ä 153) and
REFERENCE DENSITY (OTHER) (ä 152). Thereby the gas calculator with preset gases and the real gas
equation can be combined.
– The current gas mixture can be checked in the GAS MIXTURE function.
• Programming examples
a. Number of gas constituents: 1
Gas type 1: AIR
Mole-% Gas 1: 100.00%
b. Number of gas constituents: 3
Gas type 1: ARGON
Mole-% Gas 1: 004.00%
Gas type 2: OXYGEN
Mole-% Gas 2: 093.00%
Gas type 3: NITROGEN
Mole-% Gas 3: 003.00%
c. Number of gas constituents: 5
Gas type 1: CARBON DIOXIDE
Mole-% Gas 1: 036.00%
Gas type 2: METHANE
Mole-% Gas 2: 060.00%
Gas type 3: NITROGEN
Mole-% Gas 3: 002.00%
Gas type 4: CARBON MONOXIDE
Mole-% Gas 4: 001.00%
Gas type 5: OTHER
Mole-% Gas 5: 001.00%
OPERATING-Z-FACTOR
1.0000
REFERENCE-Z-FACTOR
1.0000
REFERENCE DENSITY
1.293 kg/m3
NUMBER OF GASES Description
Use this function to enter the number of gases that are used in the gas mixture.
User input
1 to 8
Factory setting
• As per the parameter printout supplied with the device if Prowirl 73 was ordered with
a preprogrammed mixture.
• Otherwise "1" is the factory setting.