|
|
 Itron Dattus succeeds. As a global leader in measurement systems, we offer over 100 years of experience in the resource measurement business. We use that experience to bring the right combination of people, resources, and technology to deliver results that track to your bottom line. Our drive to succeed has spawned innovations like the Dattus? FM2 & FM3 Gas Meters, the latest generation of electronic gas meters. With no moving parts, this meter offers numerous advantages over existing technologies. The Dattus FM2 & FM3 can replace current rotary and diaphragm meters (1,000 - 56,000 cfh capacity rated) in many situations, thereby reducing the number of different size meters needed in inventory.
The operation of the Dattus meter is based on the fluidic oscillation principle. The measurement unit is comprised of three functional elements: ? Flow conditioner ? Jet nozzle formation ? Fluidic oscillator chamber Gas enters (1) the meter and divides into two separate flow paths (2). These two flows recombine (3) as they exit the flow conditioner and enter the fluidic oscillation chamber through the nozzle. This process of dividing the flows eliminates upstream disturbances and creates a well-conditioned flow. In the fluidic oscillation chamber, a jet is formed (4) as the gas enters through the nozzle.
The jet then starts oscillating back and forth (5). Thermal sensors, located just after the nozzle, detect a temperature variance as the gas jet passes from one side to the other. The volume of gas passed through the meter is obtained by counting the number of oscillations detected by the sensors. metering based on the gas pressure and temperature in the meter.
The functions available are shown below: ? Gas volume totaling ? Fixed factor correction ? Non-volatile memory for storing values and data ? Optical communication port for reading/writing of values ? Eight item programmable display ? Magnetic switch to change display values Optional Features: In addition to the standard functionality of the basic configuration, the following options can be added: ? Temperature correction using a temperature probe mounted in the gas flow ? Volume and alarm pulse outputs ? Push button to change display values ? PTZL(EVC) & Compatible with Mercury EVC'S.
Pulse Outputs
• Form A type
• Selectable between Uncorrected Volume, Corrected
Volume (Fixed Factor Pressure), or Alarm Outpu
• Programmable volume pulse weights
• Programmable pulse width (0.010 seconds to 1.75 seconds)
or use 50% duty cycle
• Compatible with most AMR devices and volume correctors
Data Logging
• Data logging/Audit trail is an available option.
• 3100 records are available that can be allocated between
hourly, daily, and monthly logs.
• In addition, a high frequency logger is available (up to 500
records), with a selectable logging intervals between 30
seconds and 30 minut
• Items logged include Uncorrected Volume, Corrected
Volume (Fixed Factor Pressure), and maximum flow rate
during interval.
• Data accessible via the Dattus PC Link software and
exportable to Microsoft® Excel
Event Logging
• 512 event records in a circular log
• 62 items in a last occurrence log
• Records both user and system events
• User events - Records who, what, and when for
configurations changes, as well as the old and new values.
• System events – Time & Date stamp of alarms
• May be accessed via PC Link software and exported to
Microsoft® Excel.
Modbus Communications
• Dattus can communicate via Modbus RTU protocol. It is
designed to be compatible with SCADA and other
equipment that communicates via Modbus
LCD
• Uncorrected Volume or Fixed Pressure Corrected Volume
displayable.
• Programmable Display (4,5, or 6 Digits)
• Flow Indicator - rolling icons on the LCD that move
proportional to the flow rate through meter.
• Alarm Indications for battery, overflow, or sensor alarms.
Upgradeability
• The Dattus flow rate can be field converted to a larger flow
rate capacity within the same model size (i.e. fM2 or fM3).
• Conversion is accomplished with a simple software key (e.g.
For example a Dattus 2M could be field converted to a 5M
if customer load demands it).
• No shutting the customer down or putting on bypass, no repiping,
etc.
• Data logging can also be enabled via software key.
|
|
|