Fisher Natural Gas – Instruments

Instruments
•    GridBoss System
•    RegFlo RF100 Series

 

The Gridboss System - Gas Pressure Control and Management

The GridBossTM Gas Pressure Control System uses a minimum of a GB601 District Regulator (DR) Controller at the district regulator station and a GB602 Low Pressure Point (LPP) Controller at the system low pressure point. The DR controller incorporates an adaptive/predictive computer algorithm that uses the pressure data to develop setpoint profiles based on the time of day and ambient temperature. The controller uses this information to adjust the setpoint of the district regulator, using an actuator or servo valve, in anticipation of the gas demand.

The two controllers work in tandem to maintain the low pressure point within a specified deadband, thereby reducing average system pressure. In a typical municipal installation, many district regulator controllers would be employed at regulator stations around a city to control gas pressure based on the time of day and temperature demand profiles derived from the low pressure point controller.

For more product information, refer to the following articles:

  • GridBoss: Maintaining Gas Distribution Pressure with Adaptive Predictive ControlTM - Article
  • GridBossTM System Receives R & D Magazine's Technology Award - Article
  • GridBoss: Yankee Gas Helps Develop Groundbreaking Natural Gas Technology - Article


Features

  • Reductions in lost gas
  • Fewer repair calls
  • Reduced meter under-registration
  • Reduced incident mitigation
  • Better manpower allocation
  • Reduced greenhouse emmisions

Types

  • GB601 District Regulator Controller
  • GB602 Low Pressure Point Controller

Software

  • GRIDLINK Configuration Software
  • GM1000 GridManager User Interface Software

Specification Sheets

  • GB601 District RegulatorController
  • GB602 Low Pressure PointController
  • GRIDLINK ConfigurationSoftware
  • GRIDLINK User Manual
  • GM1000 GridManager User InterfaceSoftware
  • GridManager User Manual

 

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RegFlo RF100 Series Pressure and Flow Instruments

RegFlo RF100 Series pressure and flow instruments are devices which measure and archive flow and pressure data. Other parameters such as battery voltage, and minimum and maximum values are also stored. Alarms may be configured to signal abnormal or emergency conditions. The Type RF110 instrument is used as a standalone pressure instrument. Mounted on a regulator, such as the Type EZR, the Type RF100 instrument measures pressure and also estimates flow rates based on valve plug travel.

RegFlo Facts
News Release
Photos
RegFlo: Fluid Handling and Fluid Power (Mechanical Engineering)


RF100 Flow Recorder
The RegFlo Type RF100 instrument measures valve plug travel, inlet pressure, and outlet pressure. A third pressure sensor is available as an option to measure an additional auxiliary pressure. An algorithm estimates the flow through the regulator and archives pressure, travel, and flow data in history. It also records other parameters such as battery voltage, minimums and maximum values, etc. Alarms may be configured to signal abnormal or emergency conditions.

RF110 Electronic Pressure Recorder (EPR)
The RegFlo Type RF110 Instrument is used as a standalone pressure recorder. It is the same as the Type RF100 except it is mounted remotely from the regulator and does not measure regulator travel or estimate flow rates. Pressures are piped to the unit and are measured and archived in history. Up to 3 pressure sensors may be installed. Other parameters such as battery output, and minimum and maximum values are also stored. Alarms may be configured to signal abnormal or emergency conditions

Features

  • Data Archive
  • Flow Estimation
  • Pressure Recorder
  • User Level Security
  • Economical Flow Data
  • Host Communications
  • Local Communications
  • Low Power Consumption
  • Type EZR Retrofit Capability

Security

  • 5 users with passwords and 3 levels of access

Alarms

  • Hi, Hi/Hi, Low, and Low/Low, on all analog inputs
  • Logic Alarms
  • 240 logs in alarm log

Flow Estimation Accuracy

  • +/- 20% of actual flow for flow between 10 and 20% of maximum
  • +/- 10% of actual flow for flow between 20 and 100% of maximum

Daily Log

  • 35 days of daily values (average, accum, min/max)

Sample Intervals

  • 10 and 30 seconds; 1, 2, 5, 10, and 30 minutes

Processor Memory

  • Flash: 128 Kbytes
  • EEProm: 32 Kbytes
  • Static RAM: 128 Kbytes

Power

  • Battery Input: 3.6 Vdc
  • Input Power: 10 to 28 Vdc

Real Time Clock

  • Hr : Min : Sec
  • Day : Month : Year
  • Battery Backed

Diagnostics

  • Board Temperature, Power Input, Logic/Battery Voltage

Communication Ports

  • Operator Interface: RS-232 (RX, TX, RTS); ROC protocol only
  • COM1: RS-485; ROC and ModBus protocol
  • COM2 (Optional): RS-232 or V-22 BIS Modem; ROC and ModBus protocol

Approvals

  • CSA Class 1, Division 1, Explosion-Proof, Gas Groups C and D; Class 1, Division 2, Nonincindive Groups C and D; Certified to Canadian and U.S. Standards

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