KROHNE partner product
ERW 700
Flow computer for liquids, gases and steam
- Calculation unit for heat metering (MID MI-004) and cold water metering (PTB); logger function
- Calculates the energy, (standard) volume and mass from input variables (flow rate, pressure, etc.)
- Input: 2 x 0/4…20 mA, 2 x pulse or frequency, 2 x Pt100/500/1000
- Output: 2 x 0/4…20mA, 3 x pulse, MBus, Modbus (RS 232), etc.
KROHNE partner product
Overview
The ERW 700 is a flow computer for energy and flow rate calculation of gaseous, vaporous and liquid media. As a MI-004 approved calculation unit it can be used as part of a heat metering system in custody transfer applications. In addition, it is approved according to PTB for use in combination with a cooling meter. The flow computer calculates the (standard) volume, mass and energy of liquids, gases and steam from the input variables flow rate, (differential) pressure, temperature and density.
Features & Options
Product features and options depend on device configuration: Contact us to make sure that your preferred functionality can be combined in one device.
- Billing counter for district heating and local heating
- Numerous special functions such as for condensate/steam measurement, bidirectional measurement, heating/cooling switching, tariff or fault counters, etc.
- Can be combined with all common volume flowmeters (ultrasonic, electromagnetic, Vortex, differential pressure, Coriolis)
- High-precision calculations for density, enthalpy and compressibility
- Calculation as per IAPWS-IF97 standard (water steam table)
- Compensation input for density signal
- Logger functions for set day, monthly values, period memory, error memory, parameter memory and MIN/MAX memory
- Parameterization and operation via PC software and/or manually via display
- Remote LCD housing available (for control cabinet installation)
- Inputs and outputs modularly expandable: up to 6 x 4-20mA, 7 x digital, mbus, Modbus, Profibus
