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Reference, Installation, and Operations Manual Section 6: Meter operation
3-9000-743 Rev S June 2013
AGA8 compressibility calculations 215
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 Section 5.6.14 for information on configuring the meter for AGA8 calculations via the
Daniel MeterLink program.
6.2 Frequency, digital, and analog outputs
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 Section 2.5.2 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 Section 5.6.7 for information on configuring these outputs using the Daniel MeterLink
Field Setup Wizard. The associated configuration data points can also be configured via the
Daniel MeterLink
Edit/Compare Configuration screen.