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The 515-HC04 application measures the volume, mass and energy content of fluid in a heating or cooling system by using single or stacked differential pressure flow inputs in conjunction with feed and return temperature inputs.
A selection of fluid types and modes makes it suitable for many heating/cooling applications. Flow is calculated according to equations for ISO 5167 or V-Cone meters and accurately accounts for thermal expansion.
The instrument calculations are based on the IAPWS Industrial Formulation (1997) for the thermodynamic properties of steam. The temperature values are used to determine the density and specific enthalpy. The instrument also calculates the isentropic exponent and absolute viscosity which are required for the differential pressure calculations.
Calculations
The energy calculations are based on the IAPWS Industrial Formulation (1997). The temperature limits are dependent on the system pressure:
• 0 c at system pressure
• 32 at system pressure
Formulas:
• volume flow = Mass flow/ρflow
• Power = mass flow x (hTF – hTR)
Where:
• ρflow = density at flow x conditions
• hTF = specific enthalpy at feed temperature
• hTR = specific enthalpy at return temperature
Features
Suited for heating and/or cooling operation
Uses IAPWS-IF97 to determine water properties
Tailored for differential pressure meters with single or stacked transmitters
ISO 5167 (2003) DP flow calculations, 9 meter types
V-Cone DP flow calculation, 2 cone types
Flow meter can be located in feed or return line
Allows for non-linear correction
Selection of second language and user tags
RTC logging with over 1000 entries
Infra-red communications port on front panel
Pulse width and scaling of pulse output
4-20mA retransmission
Selectable protocols on serial portsincluding Modbus RTU and printer output
Front panel adjustment of 8-24V DC output voltage
Backlit Display
LCD Backup Typical plant diagram
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