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The 515-HC02 application measures the volume, mass and energy content of fluid in a heating or cooling systems by using analog volume flow input in conjunction with a analog feed and return temperature inputs.
A selection of fluid types and modes makes it suitable for many heating/cooling applications. The Flowmeter input signal can be selected as either 0-5V, 1-5V or 4-20mA. Minimum and maximum points are programmed and non-linear correction points can be used to better reflect the flowmeters behaviour.
The instrument calculates the mass flow and energy according to the IAPWS Industrial Formulation (1997) when the fluid type is water, while internal enthalpy and density tables are used for the selection of other industry fluids.
Calculations
The instrument can calculate the mass and energy for the following common industry fluids:
• Water
• Glycol (35% Solution)
• Brine (27% CaC2)
• TYFOXIT F20
• TYFOXIT F40
• Essotherm 500/Thermaloil
• THERMINOL 55
• User Custom Fluid
Formulas:
• Mass flow = volume flow x ρflow
• power = mass flow x hTF – hTR
Where:
• ρflow = density at flow 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
Selection of common industry fluids using internal tables
Facility for user defined Enthalpy and Density table
Tailored for volumetric analog flow input such as vortex flowmeters
Allows for stacked flow inputs
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 ports including 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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