Gaseous Fuel Distribution methane (CNG)

The EsiWelma TW1-M electronic fuel flow meters for combustible gases have LNE-15272 rev. 1 type examination certificate dated 26/08/2009 attesting to conformity with international directives OIML R117 and R139. In keeping with the aforesaid directives, the TW1-M fuel flow meters can be supplied in two versions:- Standard version with electromechanical relay command output. – Non-sparking version with solid state relay command output, compliant with ATEX 94/9/EC directive and with ATEX EX nA IIC T4 X protection mode.

The display on the TW1-M electronic volumetric fuel flow meters shows:- Price in local currency.- Dispensed fuel (volume/weight). – – Unit price. Our fuel flow meters also include the volume – temperature compensation function, which consists of maximising the fuel dispensed into the vehicle tank, taking into account the ambient temperature so as not to exceed the acceptable pressure.

The electronic fuel flow meters can be supplied with one display (one-sided meter) or two displays (two-sided meter). The electronic fuel flow meters include the preset function of both price and fuel dispensed; they also interface with a remote PC (host) to provide dispensing data conforming to the protocol in use.

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MisurFuel Electronic Computing Head Gaseous Methane (CNG) documentation

Methane two/one side

The single-product electronic fuel flow meters for methane (CNG), are defined as follows:

  • TW1-M-CB Standard, two-sided meter
  • TW1-M-CM Standard one-sided meter

TW1-M-CB

ELECTRONIC FUEL FLOW METER KIT TW1-M-CB two-sided for methane (CNG)

Formed of:

  • Power supply – CPU module, part no.: TW1-M-CPU
  • First DISPLAY module with totalizer, part no.: TW1-DCT
  • Second DISPLAY module, part no.: TW1-DCN
  • SETUP module, part no.: TW1-STP
  • 4-connection flat cable, part no.: TW1-FL2

Technical specifications:

  • Power supply 230 Vca
  • Passivated steel enclosures
  • Provision for pre-setting
  • Five relays (3A, 270 Vca , 810 VA), N.O. for solenoid valves and signal lights
  • One host communication line, three current loop cables
  • Signal input: pulsed or ModBus mass measuring device (Krohne, Micromotion, Endress Hauser)
  • Temperature compensation
  • Self-Service Operation Ready (Italy Decree of 11/09/2008)

Options:

  • Backlighting for every Display (230 Vca): LED (TW1-RCL)
  • Custom host communication card
  • Additional output for low flow predetermination

Accessories:

  • Preset keyboard, part no.:TW1-TPR
  • Extended Preset keypad, part no.: TW1-TEX
  • CNG Self-Service Control Interface, part no.: TW1-ISS
  • Repeater Alarm relay module 3A, part no.: TW1-MRE
  • Repeater Alarm solid state module 1A, part no.: TW1nA-MRS

TW1-M-CM

ELECTRONIC FUEL FLOW METER KIT: TW1-M-CM One-sided for methane (CNG)

Formed of:

  • Power supply – CPU module, part no.: TW1-M-CPU
  • First DISPLAY module with totalizer, part no.: TW1-DCT
  • SETUP module, part no.: TW1-STP
  • 3-connection flat cable, part no.: TW1-FL1

Technical specifications:

  • Power supply 230 Vca
  • Passivated steel enclosures
  • Provision for pre-setting
  • Five relays (3A, 270 Vca , 810 VA), N.O. for solenoid valves and signal lights
  • One host communication line, three current loop cables
  • Signal input: pulsed or ModBus mass measuring device (Krohne, Micromotion, Endress Hauser)
  • Temperature compensation
  • Self-Service Operation Ready (Italy Decree of 11/09/2008)

Options:

  • Backlighting for every Display (230 Vca) LED (TW1-RCL)
  • Custom host communication card

Accessories:

  • Preset keyboard, part no.:TW1-TPR
  • Extended Preset keypad, part no.: TW1-TEX
  • CNG Self-Service Control Interface, part no.: TW1-ISS
  • Repeater Alarm relay module 3A, part no.: TW1-MRE
  • Repeater Alarm solid state module 1A, part no.: TW1nA-MRS

Methane two/one side ATEX

Single-product electronic fuel flow meters for methane (CNG) installed in ATEX classified areas such as type two zones, are defined as follows:

  • TW1na-M-CM One-sided meter – ATEX
  • TW1na-M-CB Two-sided meter – ATEX

TW1nA-M-CB

ELECTRONIC FUEL FLOW METER KIT TW1nA-M-CB Two-sided for methane (CNG)

Formed of:

  • Power supply – CPU module, part no.: TW1nA-M-CPU
  • First DISPLAY module with totalizer, part no.: TW1-DCT
  • Second DISPLAY module, part no.: TW1-DCN
  • SETUP module, part no.: TW1-STP
  • 4-connection flat cable, part no.: TW1-FL2

Technical specifications:

  • Power supply 230 Vca
  • Passivated steel enclosures
  • Provision for pre-setting
  • 3+2 solid state relays (1A, 270 Vca , 270 VA), N.O. for solenoid valves and signal lights
  • One host communication line, three current loop cables
  • Signal input: pulsed or ModBus mass measuring device (Krohne, Micromotion, Endress Hauser)
  • Temperature compensation
  • Self-Service Operation Ready (Italy Decree of 11/09/2008)

Options:

  • Backlighting for every Display (230 Vca) LED part no.:TW1-RCL
  • Custom host communication card
  • Additional output for low flow predetermination

Accessories:

  • Preset keyboard part no.:TW1-TPR
  • Extended Preset keypad part no.: TW1-TEX
  • CNG Self-Service Control Interface part no.: TW1-ISS
  • Repeater Alarm relay module 3A part no.: TW1-MRE
  • Repeater Alarm solid state module 1A part no.: TW1nA-MRS

TW1nA-M-CM

ELECTRONIC FUEL FLOW METER KIT TW1nA-M-CM One-sided for Methane (CNG)

Formed of:

  • Power supply – CPU module, part no.: TW1nA-M-CPU
  • First DISPLAY module with totalizer, part no.: TW1-DCT
  • SETUP module, part no.: TW1-STP
  • 3-connection flat cable, part no.: TW1-FL1

Technical specifications:

  • Power supply 230 Vca
  • Passivated steel enclosures
  • Provision for pre-setting
  • 3+2 solid state relays (1A, 270 Vca , 270 VA), N.O. for solenoid valves and signal lights
  • One host communication line, three current loop cables
  • Signal input: pulsed or from MODBUS mass measuring device (Krohne, Micromotion, Endress Hauser)
  • Temperature compensation
  • Self-Service Operation Ready (Italy Decree of 11/09/2008)

Options:

  • Backlighting for every Display (230 Vca) LED, part no.: TW1-RCL
  • Custom host communication card
  • Additional output for low flow predetermination

Accessories:

  • Preset keyboard, part no.:TW1-TPR
  • Extended Preset keypad, part no.: TW1-TEX
  • CNG Self-Service Control Interface, part no.: TW1-ISS
  • Repeater Alarm relay module 3A, part no.: TW1-MRE
  • Repeater Alarm solid state module 1A, part no.: TW1nA-MRS