ROC800-Series Instruction Manual
Revised July-2017 General Information 1-17
The AGA 7 calculations conform to methods described in American
Gas Association Report No. 7, Measurement of Gas by Turbine Meters,
and use the AGA 8 method for determining the compressibility factor.
The AGA 8 method calculates the compressibility factor based on the
physical chemistry of the component gasses at specified temperatures
and pressures.
The firmware supports liquid calculation methods ISO 5167 and API
12. You must supply factors for API 12 correction through a Function
Sequence Table (FST) or user program. For more information, refer to
the Function Sequence Table (FST) User Manual (part D301058X012).
Note: For a complete and current listing of all supported liquid and/gas
calculations on the ROC800, refer to the technical specifications
ROC800-Series Operating System Firmware (ROC800:FW1).
1.5.4 ROC800L Flow Calculations
For the ROC800L, liquid calculation methods include:
▪ API 2450 (1980)
▪ ASTM-D1250-04, IP200/04 (same as MPMS Chapter 11)
▪ API Manual of Petroleum Measurement Standards (MPMS):
o Chapter 4.6 Pulse Interpolation (small volume proving)
o Chapter 5.5 Double Pulse Integrity (ISO 6551, IP252)
o Chapter 11.1 Volume Correction for Temperature and Pressure
o Chapter 11.2.1, 11.2.1M Pressure Correction (M is for metrics)
o Chapter 11.2.4 Light Hydrocarbons – GPA TP-27 (2007)
o Chapter 12.2 Resolution for Displays and Printed Reports
o Chapter 21.2 Electronic Flow Measurement for Liquids
▪ NIST Handbook 44
▪ IP-2 (now EI) (1980) Pressure Effects on Density
▪ IP-3 (now EI) (1988) Corrects Temp to 20C
▪ IEEE Standard 754 (1985) and API 11.1 (2004) Double Precision
Floating Point Math (64 Bit)
Note: For a complete and current listing of the supported liquid
calculations on the ROC800L, refer to the technical
specifications ROC800L Liquid Application Software
(ROC800:SW1).
1.5.5 Automatic Self Tests
The operating system firmware supports diagnostic tests on the ROC800
hardware, such as RAM integrity, Real-Time Clock operation, input
power voltage, board temperature, and watchdog timer.
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