Heat Calculators

CONTREC is global leaders of high precision quality flow instrumentation, combining nearly 40 years of engineering excellence with cutting edge technology.

Manufactured in the UK and accredited to ISO 9001:2015, they deliver reliable and accurate flow-based solutions into industries such as Oil and Gas, Chemical and Petrochemical, Food and Beverage, Energy, Water and Waste water.

Designed for precision and reliability, Contrec's flow computers are suited for diverse applications, including custody transfer, process control, and water management. They also provide instruments capable of data logging for tracking flow parameters over time, which is essential for analysis and reporting.

Overall, Contrec stands out in the flow computer sector by offering robust, innovative solutions catering to the changing needs of its diverse clientele while maintaining a commitment to accuracy, reliability, and customer satisfaction.

Products include:

• Flow Rate/Totalisers

• Heat Calculator

• Gas/Steam Flow Computers

• Loading Computers

• Flow/ Level/ Process Indicators

• Truck Registers

• Enclosures and Accessories

CONTREC 515 – HC01 – Heat Calculator - Frequency Flow (Volume)

CONTREC 515 – HC02 – Heat Calculator - Analogue Flow (Volume)

CONTREC 515 – HC03 – Heat Calculator - DP Meter (Mass Span)

CONTREC 515 – HC04 – Heat Calculator for stacked DP meters (ISO 5167 and V-Cones)

CONTREC 515 – HC06 – Heat Calculator - DP Meter (Volumetric Span)

CONTREC 515 – HC12 – Heat Calculator - Heat Calculator - Analogue Flow (Mass)

CONTREC 212 – Heat Calculator

CONTREC 515 – HC01 – Heat Calculator - Frequency Flow (Volume)

The 515 HC01 application, which seems to be a versatile tool for measuring volume, mass, and energy content of fluid in heating or cooling systems. It's great that it offers compatibility with various flowmeter frequency outputs and supports different fluid types and modes, making it suitable for a wide range of applications.

The use of the IAPWS Industrial Formulation for water and internal enthalpy and density tables for other industry fluids indicates a robust approach to calculating mass flow and energy based on the specific characteristics of different fluids.

Data Sheet CONTREC 515 HC01

Manual CONTREC 515 HC01

The Contrec 515 HC01 application pack is designed for comprehensive measurement of flow and energy content in heating and cooling systems.

Measurement Capabilities:
- Volume
- Mass flow
- Energy content (heat flow)
Inputs:
- Frequency volume flow input (from a flowmeter)
- Analog feed temperature sensor input
- Analog return temperature sensor input
Flowmeter Compatibility:
- Wide range of frequency outputs:
  - Millivolt signals
  - Reed switches
  - Namur proximity switches
  - Pulse trains
- User-friendly selection via the front panel.
Fluid Types and Modes:
- Supports various fluids like water, glycol solutions, brines, thermal oils, and user-defined options.
- Selection of fluid type optimizes calculation accuracy.
Calculations:
- Mass Flow: Calculated using the formula: mass flow = volume flow x ρflow (where ρflow is the density at flow conditions).
- Energy Flow (Heat Flow): Calculated using the formula: power = Mass flow x (hTF – hTR) (where hTF is the specific enthalpy at feed temperature and hTR is the specific enthalpy at return temperature).
- For water calculations, the IAPWS Industrial Formulation (1997) is used.
- For other fluids, internal enthalpy and density tables are employed.

Benefits

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
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

More details

CONTREC 515 – HC02 – Heat Calculator - Analogue Flow (Volume)

The 515 HC02 application shares similar functionalities with the 515 HC01 in terms of measuring volume, mass, and energy content of fluid in heating or cooling systems. The flexibility in selecting different fluid types and modes makes it suitable for various applications.

The ability to accommodate different flowmeter input signals such as 0-5V, 1-5V, or 4-20mA, along with the option to program minimum and maximum points and use non-linear correction points, reflects a high level of customization and adaptability to different flowmeter behaviors.

Just like the 515 HC01, the use of the IAPWS Industrial Formulation for water and internal enthalpy and density tables for other industry fluids indicates a robust approach to calculating mass flow and energy based on the specific characteristics of different fluids.

Data Sheet CONTREC 515 HC02

Manual CONTREC 515 HC02

The Contrec 515 HC02 application pack closely resembles the 515 HC01, but with an analog volume flow input instead of a frequency input. Here's a breakdown of its functionalities and key features:

Measurement Capabilities:
- Volume
- Mass flow
- Energy content (heat flow)
Inputs:
- Analog volume flow input (selectable as 0-5V, 1-5V, or 4-20mA)
- Analog feed temperature sensor input
- Analog return temperature sensor input
Flowmeter Compatibility:
- Designed for flowmeters with compatible analog voltage or current outputs.
Flow Input Configuration:
- User-programmable minimum and maximum points for the flowmeter signal.
- Ability to implement non-linear correction points to compensate for flowmeter behavior.
Fluid Types and Modes:
- Supports various fluids like water, glycol solutions, brines, thermal oils, and user-defined options.
- Selection of fluid type optimizes calculation accuracy.
Calculations:
- Mass Flow: Calculated using the formula: mass flow = volume flow x ρflow (where ρflow is the density at flow conditions).
- Energy Flow (Heat Flow): Calculated using the formula: power = Mass flow x (hTF – hTR) (where hTF is the specific enthalpy at feed temperature and hTR is the specific enthalpy at return temperature).
- For water calculations, the IAPWS Industrial Formulation (1997) is used.
- For other fluids, internal enthalpy and density tables are employed.
Key Points:
- Ideal for monitoring heating/cooling system performance using analog flowmeter outputs.
- User-selectable fluid types ensure accurate calculations based on specific fluid properties.
- Flexible flowmeter input configuration for wider compatibility.
Similarities and Differences with 515 HC01:
- Similar functionalities for flow, energy measurement, and fluid type selection.
Key Difference: 515 HC02 uses analog volume flow input, while 515 HC01 uses frequency volume flow input.
- 515 HC02 offers more configuration options for the analog flowmeter input signal.

Benefits

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

More details

CONTREC 515 – HC03 – Heat Calculator - DP Meter (Mass Span)

The 515 HC03 application is designed to measure the volume, mass, and energy content of fluid in heating or cooling systems using single or stacked differential pressure mass flow inputs in combination with feed and return temperature inputs.

Similar to the other applications, this one also offers a selection of fluid types and modes, making it suitable for diverse heating and cooling applications. The calculation of mass flow and energy is carried out according to the IAPWS Industrial Formulation for water, while internal enthalpy and density tables are utilized for other industry fluids, showcasing its adaptability to different fluid types.

The incorporation of specific conditions at which the flowmeter was calibrated ensures accurate measurements and reflects a commitment to precision in its operation.

Data Sheet CONTREC 515 HC03

Manual CONTREC 515 HC03

The Contrec 515 HC03 application pack offers a robust solution for advanced flow, energy content, and fluid property analysis in heating and cooling systems. Here's a breakdown of its key features:

Measurement Capabilities:
- Volume
- Mass flow
- Energy content (heat flow)
Inputs:
- Single or stacked differential pressure mass flow inputs
- Analog feed temperature sensor input
- Analog return temperature sensor input
Flow Calculations:
- Utilizes generic differential pressure equations for flow rate calculations.
- Integrates flowmeter calibration conditions for accurate results.
Fluid Types and Modes:
- Supports various fluids such as water, glycol solutions, brines, thermal oils, and user-defined options.
- Selection of fluid type optimizes calculation accuracy based on specific properties.
Energy Flow (Heat Flow) Calculations:
- Calculated using the formula: power = mass flow (This information seems incomplete in the provided description. The formula typically includes the difference in specific enthalpies at feed and return temperatures (hTF - hTR) but it's missing here).
- For water calculations, the IAPWS Industrial Formulation (1997) is used.
- For other fluids, internal enthalpy and density tables are employed.
Key Points:
- Ideal for comprehensive analysis of heating/cooling system performance using differential pressure flowmeters.
- User-selectable fluid types ensure accurate calculations for various fluids.
- Offers advanced flow calculations considering calibration conditions.
Additional Notes:
- The provided formula for energy flow seems incomplete. It likely should include the difference in specific enthalpies at feed and return temperatures (hTF - hTR) to determine the heat flow.

Benefits

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 differential pressure mass meters with single or stacked transmitters
Generic differential pressure flow calculations
Flow meter can be located in feed or return line
Allows for square law and 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

More details

CONTREC 515 – HC04 – Heat Calculator for stacked DP meters (ISO 5167 and V-Cones)

The 515 HC04 application is designed to measure the volume, mass, and energy content of fluid in heating or cooling systems using single or stacked differential pressure flow inputs in combination with feed and return temperature inputs.

Similar to the other applications, this one also offers a selection of fluid types and modes, making it suitable for diverse heating and cooling applications. Notably, the flow calculation method is based on equations for ISO 5167 or V-Cone meters, ensuring accurate measurements and accounting for thermal expansion.

Moreover, the instrument's calculations are based on the IAPWS Industrial Formulation for the thermodynamic properties of steam, with temperature values used to determine density and specific enthalpy. Additionally, the instrument calculates the isentropic exponent and absolute viscosity, which are essential for the differential pressure calculations, showcasing its comprehensive approach to fluid measurement.

Data Sheet CONTREC 515 HC04

Manual CONTREC 515 HC04

The Contrec 515 HC04 application pack is designed for high-accuracy measurement of flow, energy content, and fluid properties in heating and cooling systems, particularly when using ISO 5167 or V-Cone meters. Here's a breakdown of its key features:

Measurement Capabilities:
- Volume
- Mass flow
- Energy content (heat flow)
Inputs:
- Single or stacked differential pressure flow inputs (ISO 5167 or V-Cone meters)
- Analog feed temperature sensor input
- Analog return temperature sensor input
Flow Calculations:
- Utilizes specific differential pressure equations designed for ISO 5167 or V-Cone meters, ensuring accurate flow measurement.
- Integrates flowmeter calibration conditions for precise results.
- Accounts for thermal expansion effects for reliable measurement.
Fluid Types and Modes:
- Supports various fluids like water, glycol solutions, brines, thermal oils, and user-defined options (depending on the chosen fluid type).
- Selection of fluid type optimizes calculation accuracy based on specific properties.
- Energy Flow (Heat Flow) Calculations:
- Calculated using the formula: Power = mass flow x (hTF – hTR) (where hTF is the specific enthalpy at feed temperature and hTR is the specific enthalpy at return temperature).
- The IAPWS Industrial Formulation (1997) is used for these calculations.
Additional Calculations:
- Determines density and specific enthalpy based on temperature values.
- Calculates isentropic exponent and absolute viscosity (required for differential pressure calculations).
Key Points:
- Ideal for precise flow and energy analysis in heating/cooling systems using ISO 5167 or V-Cone meters.
- Leverages specialized flow calculations for these meter types.
- Offers advanced property calculations like density, enthalpy, isentropic exponent, and viscosity.

Benefits

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

More details

CONTREC 515 – HC06 – Heat Calculator - DP Meter (Volumetric Span)

The 515 HC06 application is designed to measure the volume, mass, and energy content of fluid in heating or cooling systems using single or stacked differential pressure volumetric flow inputs along with feed and return temperature inputs.

Similar to the other applications, this one also provides a selection of fluid types and modes, making it suitable for various heating and cooling applications. The calculation of flow is performed according to generic differential pressure equations, while considering the conditions at which the flowmeter was calibrated, ensuring accuracy in its measurements.

Furthermore, when the fluid type is water, the instrument calculates the mass flow and energy according to the IAPWS Industrial Formulation (1997), whereas internal enthalpy and density tables are utilized for other industry fluids, demonstrating its versatility in handling different fluid types.

Data Sheet CONTREC 515 HC06

Manual CONTREC 515 HC06

The Contrec 515 HC06 application pack offers a well-rounded solution for flow, energy content, and fluid property measurement in heating and cooling systems using differential pressure flowmeters. Here's a breakdown of its key features:

Measurement Capabilities:
- Volume
- Mass flow
- Energy content (heat flow)
Inputs:
- Single or stacked differential pressure volumetric flow inputs
- Analog feed temperature sensor input
- Analog return temperature sensor input
Flow Calculations:
- Utilizes generic differential pressure equations for flow rate calculations.
- Integrates flowmeter calibration conditions for accurate results.
Fluid Types and Modes:
- Supports various fluids like water, glycol solutions, brines, thermal oils, and user-defined options.
- Selection of fluid type optimizes calculation accuracy based on specific properties.
Energy Flow (Heat Flow) Calculations:
- Calculated using the formula: Power = Mass flow x (hTF – hTR) (where hTF is the specific enthalpy at feed temperature and hTR is the specific enthalpy at return temperature).
- The IAPWS Industrial Formulation (1997) is used for water calculations.
- For other fluids, internal enthalpy and density tables are employed.
Similarities with 515 HC03 and Differences from 515 HC01/HC02:
- Similar to 515 HC03, the 515 HC06 uses differential pressure flowmeters and offers fluid type selection for accurate calculations.
- Unlike 515 HC01 (frequency input) and HC02 (analog volume flow input), the 515 HC06 utilizes differential pressure volumetric flowmeters.
Key Points:
- Ideal for general flow and energy analysis in heating/cooling systems using differential pressure flowmeters.
- User-selectable fluid types ensure calculations are tailored to specific fluid properties.
- Provides robust flow calculations with consideration for calibration conditions

Benefits

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 differential pressure mass meters with single or stacked transmitters
Generic differential pressure flow calculations
Flow meter can be located in feed or return line
Allows for square law and 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.

More details

CONTREC 515 – HC12 – Heat Calculator - Heat Calculator - Analogue Flow (Mass)

The 515 HC12 application, which is used to measure the volume, mass, and energy content of fluid in heating or cooling systems. It utilizes an analog mass flow input along with analog feed and return temperature inputs. The flexibility to select from a range of fluid types and modes makes it suitable for various heating and cooling applications.

Additionally, the flowmeter input signal can be chosen as 0-5V, 1-5V, or 4-20mA. The device allows for programming minimum and maximum points, and it can utilize non-linear correction points to better represent the flowmeter's behavior.

When the fluid type is water, the instrument calculates mass flow and energy according to the IAPWS Industrial Formulation (1997).

Data Sheet CONTREC 515 HC12

Manual CONTREC 515 HC12

The Contrec 515 HC12 application pack offers a simplified approach to flow, energy content, and fluid property measurement in heating and cooling systems. Here's a breakdown of its key features:

Measurement Capabilities:
- Volume
- Mass flow
- Energy content (heat flow)
Inputs:
- Analog mass flow input (selectable as 0-5V, 1-5V, or 4-20mA)
- Analog feed temperature sensor input
- Analog return temperature sensor input
Flowmeter Compatibility:
- Designed for flowmeters with compatible analog voltage or current mass flow outputs.
Flow Input Configuration:
- User-programmable minimum and maximum points for the flowmeter signal.
- Ability to implement non-linear correction points to compensate for flowmeter behavior.
Fluid Types and Modes:
- Supports various fluids such as water, glycol solutions, brines, thermal oils, and user-defined options.
- Selection of fluid type optimizes calculation accuracy based on specific properties.
Energy Flow (Heat Flow) Calculations:
- Calculated using the formula: power = mass flow x (hTF – hTR) (where hTF is the specific enthalpy at feed temperature and hTR is the specific enthalpy at return temperature).
- The IAPWS Industrial Formulation (1997) is used for water calculations.
- For other fluids, internal enthalpy and density tables are employed.
Key Points:
- Ideal for applications where a direct mass flow input is available and a simpler approach to flow and energy analysis is sufficient.
- User-selectable fluid types ensure calculations are tailored to specific fluid properties.
- Flexible flowmeter input configuration for wider compatibility.
Similarities and Differences with 515 HC02:
- Similar functionalities for flow, energy measurement, fluid type selection, and temperature-based property calculations (like 515 HC02).
Key Differences:
- 515 HC12 uses an analog mass flow input, while 515 HC02 uses an analog volume flow input.
- 515 HC12 directly measures mass flow, eliminating the need for density calculations in the flow rate determination.

Benefits

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 mass 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

More details

CONTREC 212 – Heat Calculator

The 212 is quite versatile as it comes complete with temperature probes and is designed to interface with a variety of flowmeters. These include positive displacement and inferential water meters, magnetic flowmeters with pulse outputs, as well as turbine and paddle wheel flowmeters. This flexibility makes it suitable for a wide range of applications

Data Sheet CONTREC 212

Manual CONTREC 212

The Contrec 212 Heat Calculator is a robust instrument designed to accurately measure energy consumption in hot water heating and chilled water cooling systems. Here's a breakdown of its key features and capabilities:

Measurement Applications:
- Hot water heating systems
- Chilled water cooling systems
Sensor Compatibility:
- Supplied with temperature probes (Pt100 RTDs)
- Interfaces with various flowmeters:
  - Positive displacement and inferential water meters
  - Magnetic flowmeters with pulse outputs
  - Turbine and paddle wheel flowmeters
Operational Flexibility:
- Multilingual capability for international use
- Datalogging for historical data analysis
- Peak/off-peak operation for energy consumption monitoring during different periods
- Four operation modes (covering heating and cooling) for diverse applications
High Accuracy:
- Meets European and International approvals for heat calculators (OIML R75 Class 4 and EN1434)
- High-precision temperature sensors (Pt100 RTDs) with built-in non-linearity correction
- Zero offset correction for chilled water measurements with small temperature differences
Rugged Construction:
- Watertight IP66 (NEMA 4X) rated polycarbonate enclosure for harsh environments
- Wall or panel mounting options
Communication and Integration:
- Meter-bus interface for integration with energy management systems using IEC 870-5 protocol
- RS485 communication port for connection to computers and DCS systems
Datalogging and Data Retrieval:
- Stores energy totals by hour, day, week, or month for up to 31 periods
- Downloaded to a computer via Meter-bus or RS485 communication ports

In essence, the Contrec 212 Heat Calculator is a comprehensive solution for building owners, facility managers, and energy professionals seeking to accurately measure and monitor energy consumption in hot water heating and chilled water cooling systems.

Benefits

Complies with OIML R75 and EN1434 Standards
Multilingual Capability
Heating, Cooling and Air Conditioning
Built-in Density and Enthalpy Tables
Meter-Bus Interface or RS485 Communications
Metric or US Units
4-Wire PT100 RTD Temperature Inputs
Fully Programmable
Calculates and Displays Volume, Energy, Temperatures and Peak Energy
Watertight to IP66 (Nema 4X)
High Accuracy
CE Compliant
4-20mA Output Option

More details

Brands

Product Types

Industries We Serve

Heat Calculators

CONTREC 515 – HC01 – Heat Calculator - Frequency Flow (Volume)

CONTREC 515 – HC02 – Heat Calculator - Analogue Flow (Volume)

CONTREC 515 – HC03 – Heat Calculator - DP Meter (Mass Span)

CONTREC 515 – HC04 – Heat Calculator for stacked DP meters (ISO 5167 and V-Cones)

CONTREC 515 – HC06 – Heat Calculator - DP Meter (Volumetric Span)

CONTREC 515 – HC12 – Heat Calculator - Heat Calculator - Analogue Flow (Mass)

CONTREC 212 – Heat Calculator

CONTREC 515 – HC01 – Heat Calculator - Frequency Flow (Volume)

Benefits

CONTREC 515 – HC02 – Heat Calculator - Analogue Flow (Volume)

Benefits

CONTREC 515 – HC03 – Heat Calculator - DP Meter (Mass Span)

Benefits

CONTREC 515 – HC04 – Heat Calculator for stacked DP meters (ISO 5167 and V-Cones)

Benefits

CONTREC 515 – HC06 – Heat Calculator - DP Meter (Volumetric Span)

Benefits

CONTREC 515 – HC12 – Heat Calculator - Heat Calculator - Analogue Flow (Mass)

Benefits

CONTREC 212 – Heat Calculator

Benefits