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Rosemount 3095FC
Reference Manual
00809-0100-4832, Rev AA
October 2004
Firmware The firmware contained in flash ROM on the termination board, determines
the functionality of the 3095FC and includes:
• 1992 AGA-3 flow calculations (with user-selectable AGA8
compressibility Detail, Gross I, or Gross II) for a single meter run
• Memory logging of 240 alarms and 240 events
• Archival of minute data from the last 60 minutes for 15 points
• Archival of 60 days of 10-minute data for 4 points
• Archival of 35 days of hourly data for 15 points
• Archival of 35 days of daily data for 15 points
• Archival of Min / Max historical data for today and yesterday
• Communications based on Modbus slave, (ASCII or RTU) protocol for
use with EFM applications
• User level security
Accessories The 3095FC supports the following options and accessories:
• Local Operator Interface (LOI) cable
• Liquid Crystal Display (LCD) with two-line alphanumeric viewing. The
LCD automatically displays information at 3-second intervals.
• Solar panel mast assembly (installed to recharge the backup battery)
Automatic Tests The 3095FC performs the following self-tests on a periodic basis:
• Battery low and high
• Software and hardware watchdog
• RTD automatic temperature compensation
• Sensor operation
• Memory validity
The 3095FC will operate with its internal batteries down to 5.4 VDC. The LCD
becomes active when input power with the proper polarity and startup voltage
(typically set greater than 8.0 Volts) is applied to the CHG+ connector
(provided the power input fusing/protection is operational). The battery and
logical voltage tests ensure that the 3095FC is operating in the optimum
mode.
The software watchdog is controlled by the central processor unit (CPU). The
software will arm the watchdog timer every second. If the watchdog timer is
not armed for a period of 6 seconds, then the watchdog timer forces the
3095FC unit to reset. If necessary, the software automatically resets. The
hardware watchdog is controlled by the CPU and monitors the power to the
hardware. If the battery voltage drops below 5.4 volts, the 3095FC
automatically shuts down.
The Rosemount 3095FC monitors its orifice-metering measurement for
accurate and continuous operation.