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GC Write Override Tab

The GC Write tab allows users to configure which TLPs are written to upon gas chromatograph write events.

Configuring GC Write override is optional. If you do not configure GC Write overrides here, the ROC protocol will default to the following TLPs:

Component

ROC 800 Gas Meters

ROC800 Liquid Meters

All other Gas Meters

METHANE

112.28

203.105

7.28

ETHANE

112.29

203.106

7.29

PROPANE

112.30

203.107

7.30

IBUTANE

112.32

203.109

7.32

NBUTANE

112.31

203.108

7.31

IPENTANE

112.34

203.111

7.34

NPENTANE

112.33

203.110

7.33

NEOPENTANE

N/A

203.104

N/A

NHEXANE

112.35

203.112

7.35

NHEPTANE

112.36

203.113

7.36

NOCTANE

112.37

203.104

7.37

NDECANE

112.39

203.126

7.39

C6PLUS

112.47

N/A

N/A

H2

112.45

N/A

7.42

H2O

112.41

203.128

7.26

H2S

112.40

203.120

7.25

O2

112.43

203.118

7.40

CO

112.44

N/A

7.41

CO2

112.27

203.119

7.24

N2

112.26

203.117

7.23

HELIUM

112.42

203.127

7.27

ARGON

N/A

N/A

N/A

BTU

112.22

N/A

7.6

SPECIFICGRAVITY

112.23

N/A

7.5

USERDEFINEDSTRING1

N/A

N/A

N/A

USERDEFINEDSTRING2

N/A

N/A

N/A

USERDEFINEDDOUBLE1

N/A

201.8

N/A

USERDEFINEDDOUBLE2

N/A

N/A

N/A

USERSTRING

N/A

N/A

N/A

If you do link a Gas Chromatograph object for a specific meter and you wish to override the default TLP that is written to for a specific component, you must be explicit which TLP you would like to write to. In the example below, for the meter in question, when the user or system sends a USERDEFINEDDOUBLE1 value, that value will be written to the soft point 98.3:4. Since all the other component entries in that Gas Chromatograph object example are empty, they will default to the TLP as defined in the table above.