Product Description; Functionality - Emerson Fisher FLOBOSS 407 Instruction Manual

FloBoss 407 Instruction Manual
2.2 PRODUCT DESCRI PTION
This section describes the functionality of the FloBoss 407, as well as its processor and termination
boards. The processor board has the microprocessor, memory components, the keypad, display
interfaces, and the connectors for mounting the communications board. The termination board has the
power supply circuitry, the communications ports, I/O ports, and the on-board monitoring circuitry.

2.2.1 Functionality

This section describes the functions of the FloBoss 407, most of which are determined by its firmware,
programmed by the factory into flash memory (see Section 2.2.2). The features and applications
provided by the firmware, which must be configured by using ROCLINK Configuration Software, are:
♦ Either 1985 or 1992 AGA3 flow calculations for an orifice meter, plus AGA7 flow
calculations for a turbine meter.
♦ Archival of data for up to 50 history points.
♦ Memory logging of 240 alarms and 240 events (plus audit log events for the Measurement
Canada version).
♦ Logic and sequencing control using a user-defined FST program.
♦ Closed loop control (PID) capability.
♦ Power cycling control for a radio (not available in Measurement Canada version).
♦ Report-by-exception (RBX) alarming capability (Version 1.05 and greater).
♦ Capability to load and run user programs, such as the Modbus Protocol Emulation Program.
2.2.1.1 Flow Measurement
One of the primary functions of the FloBoss 407 is to measure the flow of natural gas in accordance
with the 1985 or 1992 American Petroleum Institute (API) and American Gas Association (AGA)
standards. The FloBoss performs either 1985 or 1992 AGA3 orifice calculations, depending on which
was ordered (firmware Version 1.04 and earlier contains both). In addition, all versions of FloBoss 407
firmware contain the AGA7 turbine meter flow calculation function.
The primary inputs used for the orifice metering flow measurement function are differential pressure,
static pressure, and temperature. These inputs typically come from the Multi-Variable Sensor (MVS).
The temperature input typically comes from an RTD probe, whether connected to the MVS or not.
The 1985 flow calculation is in accordance with AGA Report No. 3 1985 and AGA Report No. 8 1985
(ANSI/API 2530-85 and API Chapter 14.2), and API Chapter 21.1. The 1985 flow calculation may be
configured for either Metric or English units.
The 1992 flow calculation is in accordance with AGA Report No. 3 1992 (ANSI/API 2530-92), AGA
Report No. 8 1992 2nd printing 1994 (API Chapter 14.2), and API Chapter 21.1. The 1992 flow
calculation may be configured for either Metric or English units.
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