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
- 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 OptionSupports: 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
- Attractive Wall Mount Enclosure Available
The ES-749 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 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, Compressed Air, Chilled Water Only, and Heated Water Only including Low DeltaT Cutout. 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 start-up system checkout by monitoring inputs and exercising outputs. The system setup can also be printed.
Specifications:
Environmental :
Operating Temperature: 0 to +50 C
Storage Temperature: -40 to +85 C
Humidity : 0-95% Non-condensing
Materials: UL, CSA, VDE approved
Display :
Type: 2 lines of 20 characters
Types: Backlit LCD, OLED, and VFD ordering options
Character Size: 0.2” nominal
User-selectable label descriptors and units of measure
Keypad :
Keypad Type: Membrane Keypad with 16 keys
Keypad Rating: Sealed to NEMA 4X / IP65
Enclosure :
Enclosure Options: Panel, Wall, Explosion Proof
Size: See Dimensions
Depth behind panel: 6.5” including mating connector
Type: DIN
Materials: Plastic, UL94V-0, Flame retardant
Bezel: Textured per matt finish
Power Input :
The factory-equipped power option is internally fused. An internal line-to-line filter capacitor is 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 Power: 6.5 V/A
DC Power: 300 mA max.
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 others
Multi-Point Linearization: May be used with all flowmeter types.
Including 16 points, UVC, and dynamic
compensation.
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 Over-voltage protection
Over-Current Protection: Internally current limited protected to 24VDC
Pulse Inputs :
Number of Flow Inputs: one Input
Impedance: 10 k Ω 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) Selectable sensitivity:
10 mV and 100 mV
Minimum Count Speed: 0.25 Hz (to maintain rate display)
Maximum Count Speed: Selectable: 0 to 50 kHz
Overvoltage Protection: 50 VDC
Data Sheet: ES749-utility-metering-flow-computer
Reference: https://kepmeters.com
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