KEPmeter ES-759 Seasonal Utility Metering Flow Computer


KEPmeter ES-759 Seasonal Utility Metering Flow Computer satisfies the instrument requirements for a variety of flowmeter types in liquid, gas, steam, and heat applications. Multiple flow equations are available in a single instrument with many advanced features. The ES-759 offers a special feature that allows users to access Heating Total by pressing the TOTAL button, and Cooling Total by pressing the GRAND button when using Liquid Delta Heat Equation.

The alphanumeric display offers measured parameters in easy to understand format. Manual access to measurements and display scrolling is supported. The versatility of the Flow Computer permits a wide measure of versatility within the instrument package. The various hardware inputs and outputs can be “soft” assigned to meet a variety of common application needs. The user “soft selects” the usage of each input/output while configuring the instrument.

Applications Include

Steam Mass, Steam Heat, Natural Gas, Fuel 0il, CompressedmAir, Combination Chilled Water, and Heated Water including Low DeltaT.

The isolated analog output can be chosen to follow the volume flow, corrected volume flow, mass flow, heat flow, temperature, pressure, or density by means of a menu selection. Most hardware features are assignable by this method.

The user can assign the standard RS-232 Serial Port for external data logging, transaction printing, or for connection to a modem for a remote meter reading. A Service or Test mode is provided to assist the user during startup system checkout by monitoring inputs and exercising outputs. The system setup can also be printed.

KEPmeter ES-759 Seasonal Utility Feature

  • “EZ Setup”- Guided Setup for First-Time Users
  • Liquid, Gas, Steam and Heat Flow Equations
  • Utility Metering – Steam, Heating/Cooling, Chilled Water, Natural Gas, Compressed Air
  • Press the TOTAL button to view Heating Total, and Press, the GRAND button to view the Cooling Total (Liquid Delta Heat Equation)
  • Menu Selectable Hardware & Software Features
  • Internal Data Logger
  • Isolated Pulse and Analog Outputs Standard
  • RS-232 Port Standard, Provides Power for Modem
  • RS-485 with Modbus RTU (optional)
  • Internal Communication Card Option
    Supports: BACnet IP, BACnet MS/TP, Metasys N2, Modbus TCP, AB Ethernet IP, AB DF1, LonWorks*
  • Windows™ Setup Software
  • NX19 Gas Equations, Stacked DP Transmitters
  • DDE Server & HMI Software Available
  • Remote Metering by External Wireless or Modem

KEPmeter ES-759 Seasonal Utility Specification

Flow Meters and Computations

  • Meter Types: Vortex, Turbine, Positive Displacement, Magnetic, GilFlo, ILVA, Mass Flow, and others
  • Square Law: Orifice, Venturi, Nozzle, V-Cone, Wedge, Averaging Pitot, Target, Verabar, Accelabar, and others
  • Multi-Point Linearization: May be used with all flowmeter types. Including 16 points, UVC, and dynamic compensation.


  • Operating Temperature: 0°C to +50°C
  • Storage Temperature: -40°C to +85 C
  • Humidity : 0-95% Non-condensing
  • Materials: UL, CSA, VDE approved


  • Listing: CE Compliant, UL/C-UL Pending


  • Type: 2 lines of 20 characters
  • Types: Backlit LCD or OLED
  • Character Size: 0.2” nominal
  • User-programmable label descriptors and units of measure


  • Keypad Type: Membrane Keypad with 16 keys
  • Keypad Rating: Sealed to NEMA 4X / IP65


  • Enclosure Options: Panel & Wall Mounting Styles
  • Size: See Dimensions on the datasheet
  • Depth behind panel: 6.5” including mating connector
  • Type: DIN
  • Materials: Plastic, UL94V-0, Flame retardant
  • Bezel: Textured per matt finish

Real-Time Clock

  • The Flow Computer is equipped with a battery-backed real-time clock with a display of time and date.
    • Format:
      • 24-hour format for time
      • Day, Month, Year date display

Power Input

  • The factory-equipped power option is internally fused. An internal line-to-line filter capacitor and MOV are provided for added transient suppression.MOV protection for surge transient is also supported
  • Universal AC Power: 85 to 276 Vrms, 50/60 Hz
  • DC Power Option: 24 VDC (16 to 48 VDC)
  • Power Consumption:
    • AC: 6.5 V/A
    • DC: 300 mA max.
    • 24 VDC @ 100 mA (fault protected)

Flow Meter Types

  • Linear: Vortex, Turbine, Positive Displacement, Magnetic, GilFlo, ILVA, Mass Flow, and others
  • Square Law: Orifice, Venturi, Nozzle, V-Cone, Wedge, Averaging Pitot, Target, Verabar, Accelabar and
  • Multi-Point Linearization: May be used with all flowmeter types. Including 16-point, UVC, and dynamic

Flow Inputs:

  • Analog Input:
    • Accuracy: 0.02% FS at 20° C
    • Ranges
      • Voltage: 0-10 VDC, 0-5 VDC, 1-5 VDC
      • Current: 4-20 mA, 0-20 mA, 4-20 mA stacked, 0-20 mA stacked
    • Basic Measurement Resolution:16 bit
    • Update Rate: 4 updates/sec
    • Automatic Fault detection: Signal over/under-range, Current Loop Broken
    • Calibration: Operator-assisted learning mode
    • Extended calibration: Learns Zero and Full Scale of each range
    • Fault Protection:
      • Fast Transient: 500 V Protection (capacitive clamp)
      • Reverse Polarity: No ill effects
      • Over-Voltage Limit: 50 VDC Overvoltage protection
      • Over-Current Protection: Internally current limited protected to 24VDC

Pulse Inputs:

  • Number of Flow Inputs: one
  • Impedance: 10 KΩ nominal
  • Trigger Level: (menu selectable)
    • High-Level Input
      • Logic On: 2.5 to 30 VDC
      • Logic Off: 0 to 2 VDC
    • Low-Level Input (mag pickup)
      • Sensitivity: 10 mV or 100 mV
  • Minimum Count Speed: 0.25 Hz (to maintain rate display)
  • Maximum Count Speed: Selectable: 0 to 50 kHz
  • Overvoltage Protection: 50 VDC

Temperature, Pressure, and Density Inputs

The compensation inputs usage is menu selectable for temperature, temperature 2, pressure, density or not used.

  • Calibration: Operator-assisted learn mode
  • Operation: Ratiometric
  • Accuracy: 0.02% FS at 20° C
  • Basic Measurement Resolution: 16 bit
  • Update Rate: 2 updates/sec minimum
  • Automatic Fault detection:
    • Signal Over-range/under-range
    • Current Loop Broken
    • RTD short
    • RTD open
    • Reverse Polarity: No ill effects
    • Over-Current Limit (current input)Internally limited to protect input to 24 VDC)
  • Available Input Ranges
    • Current: 4-20 mA, 0-20 mA
    • Resistance: 100 Ohms DIN RTD
  • 100 Ohm DIN RTD (DIN 43-760, BS 1904):
    • Three Wire Lead Compensation
    • Internal RTD linearization learns ice point resistance 1 mA Excitation current with reverse polarity
    • Temperature Resolution: 0.1° C
    • Temperature Accuracy: ± 0.5° C
  • Stored Information (ROM)
    • Steam Tables (saturated & superheated), Fluid Properties: Water, Air, Natural Gas or Generic
  • User Entered Stored Information (EEPROM / Nonvolatile RAM)
    • Transmitter Ranges, Signal Types
    • Fluid Properties (specific gravity, expansion factor, specific heat, viscosity, isentropic exponent, combustion heating value, Z factor)
    • Units Selections (English/Metric) Language Translations (optional)
  • Excitation Voltage 24 VDC @ 100 mA (fault protected)

Relay Outputs

The relay outputs usage is menu assignable to (Individually for each relay) Hi/Lo Rate Alarm, Hi/Lo Temperature Alarm, Hi/Lo Pressure Alarm, Pulse Output (pulse options), Wet Steam, or General purpose warning (security).

  • Number of relays: 2 (3 optional)
  • Contact Style: Form C contacts
  • Contact Ratings: 240 V, 5 amp

Analog Outputs

  • The analog outputs are menu assignable to correspond to the Uncompensated Volume Rate, Corrected Volume Rate, Mass Rate, Heat Rate, Temperature, Density, or Pressure.
  • Number of Outputs: 2
  • Type: Isolated Current Sourcing (shared common)
  • Available Ranges: 0-20 mA, 4-20 mA (menu selectable)
  • Resolution: 16 bit
  • Accuracy: 0.05% FS at 20 Degrees C
  • Update Rate: 5 updates/sec
  • Temperature Drift: Less than 200 ppm/C
  • Maximum Load: 1000 ohms
  • Compliance Effect: Less than .05% Span
  • 60 Hz rejection: 40 dB minimum
  • EMI: No effect at 3 V/M
  • Calibration: Operator-assisted Learn Mode
  • Averaging: User entry of DSP Averaging constant to cause a smooth control action

Data Logging

The data logger captures print list information to internal storage for approximately 1000 transactions. This information can be used for later uploading or printing. The storage format is selectable for Comma-Carriage Return or Printer formats

Internal Multi-protocol Communication Card Option

  •  Internal communication card eliminates the need for external protocol converters.
  • Supports: BACnet IP, BACnet MS/TP, Metasys N2, Modbus TCP, AB Ethernet IP, AB DF1, LonWorks*
  • Easy to configure via the Web Interface.
  • Dedicated internal LonWorks is also available
  • A dedicated internal RS485 Modbus RTU is also available

More Info Check Data Sheet: KEP meter ES759


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