The CALDON LEFM 340Ci Ultrasonic Flow Meter integrates advanced signal processing technology and transducer design, ensuring exceptional performance, reliability, and safety. Specifically engineered for critical natural gas measurement applications, this four-path flow meter features transducer isolation behind a pressure boundary, a unique feature exclusive to CALDON Ultrasonic Flow Meter products. This design offers several advantages:

1. Elimination of transducer failure due to erosions, chemicals, sudden pressures, or temperature changes.
2. Ability to safely remove transducer elements from behind the pressure boundary without special tools, simplifying operation.

Furthermore, the CALDON LEFM 340Ci Flow Meter is equipped with the CALDON USM Measurement Advisor condition-based monitoring and configuration software. This software provides continuous and remote access to real-time diagnostic data, historical data, and event logs. The data is stored within the flowmeter transmitter and in a local database structure, empowering operators to monitor and analyze critical diagnostics, thereby helping to prevent unplanned downtime.

Notably, the flowmeter body is designed and manufactured in compliance with national and international codes, regulations, and standards, making it suitable for the global natural gas market.

• Step through the ultrasonic path cycles 
• Provide gain control for each ultrasonic path
• Compute flow
• Generate pulse outputs and analog outputs

• Standard volume pulse output
• The K-factors used to configure transmitters at the factory are listed in Table 1.1. The user may 
• configure the K-factor as needed.
• Analog Inputs (up to 3)
  • Product temperature 
  • Product pressure 
• Analog Outputs (up to 2)
  • Flow (forward or reverse)
  • Temperature
  • Pressure
• Communications
  • RS-485 ports (half duplex; up to 3) – Modbus RTU
  • Ethernet port (via Copper or Fiber) with Modbus TCPIP
  • Optional HART channel (operates on second analog output)
• Digital Outputs (4)
  • Status 
  • Standard volume pulse outputs

Specification:

• Four-path configuration
• Fully isolated transducer design
• Proprietary coating
• CALDON USM Measurement Advisor

• Step through the ultrasonic path cycles 
• Provide gain control for each ultrasonic path
• Compute flow
• Generate pulse outputs and analog outputs

• Standard volume pulse output
• The K-factors used to configure transmitters at the factory are listed in Table 1.1. The user may 
• configure the K-factor as needed.
• Analog Inputs (up to 3)
  • Product temperature 
  • Product pressure 
• Analog Outputs (up to 2)
  • Flow (forward or reverse)
  • Temperature
  • Pressure
• Communications
  • RS-485 ports (half duplex; up to 3) – Modbus RTU
  • Ethernet port (via Copper or Fiber) with Modbus TCPIP
  • Optional HART channel (operates on second analog output)
• Digital Outputs (4)
  • Status 
  • Standard volume pulse outputs

• Eight-path, dual-plane configuration
• Sealed transducer housing design
• Proprietary coating
• CALDON LEFM SystemLink user interface software program eCheck software
• Compact installation footprint reduces the length of upstream pipe and eliminates the need for a flow conditioner
• Design that is configurable to accept various end connections requirements

• Step through the ultrasonic path cycles 
• Provide gain control for each ultrasonic path
• Compute flow
• Generate pulse outputs and analog outputs

• Standard volume pulse output
• The K-factors used to configure transmitters at the factory are listed in Table 1.1. The user may 
• configure the K-factor as needed.
• Analog Inputs (up to 3)
  • Product temperature 
  • Product pressure 
• Analog Outputs (up to 2)
  • Flow (forward or reverse)
  • Temperature
  • Pressure
• Communications
  • RS-485 ports (half duplex; up to 3) – Modbus RTU
  • Ethernet port (via Copper or Fiber) with Modbus TCPIP
  • Optional HART channel (operates on second analog output)
• Digital Outputs (4)
  • Status 
  • Standard volume pulse outputs

• Eight-path, dual-plane configuration
• Sealed transducer housing design
• Proprietary coating
• CALDON LEFM SystemLink user interface software program eCheck software
• Compact installation footprint reduces the length of upstream pipe and eliminates the need for a flow conditioner
• Design that is configurable to accept various end connections requirements

• Step through the ultrasonic path cycles 
• Measure meter body temperature (for thermal expansion correction – see Section 4: Understanding 
• Flow Calculations)
• Compute flow
• Communicate with external devices
• Generate pulse outputs and analog outputs

• Optional 4-20 mA analog inputs; choose from the following:
  • Product temperature 
  • Product pressure 
• Two optional 4-20 mA analog outputs; choose from the following:
  • Flow 
  • Product temperature 
  • Product pressure 
• Communications
  • Up to three RS485 ports (half duplex) – Modbus RTU
  • Ethernet port (via copper or fiber) with Modbus TCPIP
  • Optional HART channel (operates on second analog output)
• Four digital outputs
  • Status outputs
  • Standard volume pulse outputs 

Fetures:

• Quantitative evaluation of meter performance along with a continuous and instantaneous output of uncertainty in velocity, flowrate and % units.
• Internal uncertainty totalisers that report uncertainty as a volumetric total.
• Insensitivity to swirl
• Proprietary corrosion and adhesion resistant coating
• Sizes from 12” to 48” (Larger sizes available on request)
• Average error (Linearized, relative to calibration facility), < +/- 0.1% Qmin to Qmax
• Metrology Certification: OIML R137; Accuracy Class 0.5 and Measurement Instruments Directive (MID) Accuracy Class 1.0
• Compliant with AGA-9, BSI 7965 and ISO 17089
• Independent Technology Qualification: DNV Gas Fiscal Metering Class I-AAA Measurement