Emerson Process Management 3420 ユーザーズマニュアル

June 2013

3-9000-743 Rev S

The purpose of this section is to give a brief overview of the gas property data read from a GC. 
Refer to 

 for information on configuring the Daniel Mark III Ultrasonic Gas Flow Meter 

(using the Daniel MeterLink program) for communicating with a Daniel GC. Refer to 

for detailed information on interfacing the Daniel Mark III Ultrasonic Gas Flow Meter meter with 
a Daniel GC.

If the gas components are read from the GC, then the GC-reported heating value is readable via 
the 

HeatingValueGC data point. Note that type of heating value to be read from the GC must 

be specified via the 

GCHeatingValueType data point as either Btu-Dry, Btu-Saturated, or 

Btu-Actual.so that the correct GC register is read. Also, the heating value unit must be specified 
via the 

GCHeatingValueUnit data point as either Btu/ft

3

, kJ/m

3

, kJ/dm

3

, MJ/m

3

, kCal/m

3

, or 

kWh/m

3

. The GC-reported gas composition is readable via the data points listed in 

 

below:

N2GC

CO2GC

H2GC

COGC

MethaneGC

EthaneGC

PropaneGC

IsoButaneGC

NButaneGC

IsoPentaneGC

NPentaneGC

NHexaneGC

NHeptaneGC

NOctaneGC

NNonaneGC

NDecaneGC

H2SGC

Heeling

WaterGC

OxygenGC

ArgonGC

C6PlusGC
(C6PlusGCComponentID)

NeoPentaneGC