Справочник Пользователя для Emerson Process Management 3420

3-9000-743 Rev S

June 2013

6.1.17

AGA8 compressibility calculations

The Mark III meter utilizes AGA8 compressibility calculation results for profile-effect correction 
(for JuniorSonic

TM

 meters) and flow-condition-to-base-condition of the volumetric flow rate.

The Mark III meter provides for five AGA8 method selections via the 

HCH_Method data point:

•

external (0) with results specified to the meter (via the 

SpecRhoMixFlow, SpecZFlow, 

and 

SpecZBase data points)

•

internal via Gross Method 1 (1)

•

internal via Gross Method 2 (2)

•

internal via Detail Method (3)

•

None (4) (AGA8 calculations are not performed)

Refer to 

 for information on configuring the meter for AGA8 calculations via the 

Daniel MeterLink program.

The Mark III meter provides two pairs of individually configurable frequency outputs (FO1A, 
FO1B, FO2A, and FO2B), four individually configurable digital outputs (DO1A, DO1B, DO2A, and 
DO2B), and an optional analog output (AO1 via the Option Board). The frequency and digital 
outputs are divided into two groups as follows:

•

Group 1:FO1A, FO1B, DO1A, DO1B

•

Group 2:FO2A, FO2B, DO2A, DO2B

The two members of a frequency output pair are referred to as channel “A” and the channel “B”.

Each group has a separate ground (i.e., Group1Gnd and Group2Gnd) thus allowing each output 
group to be connected to a different flow computer. Refer to 

 for further 

information on the hardware configuration options for these outputs.

The frequency, digital, and analog outputs are updated at the batch update period.

6.2.1

Frequency outputs

The following paragraphs describe the frequency output pair options in detail. Since each 
frequency output pair is individually configurable, the data point names are identical except for 
the pair identifier (‘1’ or ‘2’). For example, the frequency pair content data points are 

Freq1Content and Freq2Content. For brevity, they are identified as FreqXContent where X 
represents 

1 or 2.

Refer to 

 for information on configuring these outputs using the Daniel MeterLink 

. The associated configuration data points can also be configured via the 

Daniel MeterLink 

 screen.