Hukseflux FHF05 Series User Manual

Hukseflux FHF05 Series User Manual

Foil heat flux sensor

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USER MANUAL
FHF05 series
Foil heat flux sensors with thermal spreaders, flexible,
5 different dimensions and sensitivities, with temperature
sensor
Copyright by Hukseflux Thermal Sensors B.V. |
www.huksefluxusa.com
|
info@huksefluxusa.com

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Summary of Contents for Hukseflux FHF05 Series

  • Page 1 USER MANUAL FHF05 series Foil heat flux sensors with thermal spreaders, flexible, 5 different dimensions and sensitivities, with temperature sensor Copyright by Hukseflux Thermal Sensors B.V. | www.huksefluxusa.com info@huksefluxusa.com...
  • Page 2: Cautionary Statements

    Failure to comply with a caution statement may lead to risk of minor or moderate physical injuries. NOTICE Failure to comply with a notice may lead to damage to equipment or may compromise reliable operation of the instrument. FHF05 series manual v2204 2/43...
  • Page 3: Table Of Contents

    Appendices Appendix on cable and wire extension Appendix on installation of FHF05 sensor foil Appendix on using FHF05 series with BLK – GLD sticker series Appendix on standards for calibration Appendix on calibration hierarchy Appendix on correction for temperature dependence...
  • Page 4: List Of Symbols

    List of symbols Quantities Symbol Unit Heat flux Φ W/m² Voltage output Sensitivity V/(W/m Temperature °C Thermal resistance per unit area K/(W/m²) thermal,A subscripts property of heatsink heatsink maximum value, specification limit maximum FHF05 series manual v2204 4/43...
  • Page 5: Introduction

    Figure 0.1 Model FHF05-50X50 foil heat flux sensor with thermal spreaders: thin, flexible and versatile Using FHF05 series is easy. It can be connected directly to commonly used data logging systems. The heat flux in W/m is calculated by dividing the FHF05 output, a small voltage, by the sensitivity.
  • Page 6 ASTM C1130 - 21. When used under conditions that differ from the calibration reference conditions, the sensitivity of the FHF05 series to heat flux may be different than stated on its certificate. See Chapter 2 in this manual for best practices.
  • Page 7 • BLK - GLD sticker series for every sensor dimension to separate radiative and convective heat fluxes • Hukseflux offers a complete range of heat flux sensors with the highest quality for any budget FHF05 series manual v2204 7/43...
  • Page 8: Ordering And Checking At Delivery

    Ordering and checking at delivery 1.1 Ordering FHF05 The standard configuration of FHF05 series is FHF05-50X05-02, model 50X50 with 2 metres of cable. Common options are: • model FHF05-10X10 • model FHF05-15X30 • model FHF05-15X85 • model FHF05-85X85 • change -02 to -05 or -10 metres for the respective cable length •...
  • Page 9: Quick Instrument Check

    Typical resistance should be the nominal thermocouple resistance of 2.5 Ω plus 6.8 Ω for the total resistance of the two wires of each metre (back and forth). Infinite resistance indicates a broken circuit; zero or a lower than 1 Ω resistance indicates a short circuit. FHF05 series manual v2204 9/43...
  • Page 10 Exposing the back side (the side without the dot) to heat should generate a positive signal between the red [+] and black [-] wires. Doing the same at the front side (the side with the dot), reverses the sign of the output. FHF05 series manual v2204 10/43...
  • Page 11: Instrument Principle And Theory

    (3). The thermopile generates a voltage output proportional to the heat flux through the sensor. The exact sensitivity of the sensor is determined at the manufacturer by calibration, and can be found on the product certificate that is supplied with each sensor. FHF05 series manual v2204 11/43...
  • Page 12 All FHF05’s are designed such that heat flux from the back side to the front side generates a positive voltage output signal. The dot on the foil indicates the front side. Unique features of the FHF05 series include flexibility (bending radius ≥ 7.5 x 10 m), low...
  • Page 13 The FHF05 rated temperature range for continuous use is -70 to +120 °C, for short intervals, peak temperatures -160 to +150 °C are allowed. Please contact Hukseflux when measuring at -160 °C. Prolonged exposure to temperatures near +150 °C will accelerate the ageing process.
  • Page 14: Specifications Of Fhf05 Series

    , is called heat flux. Working completely passive, using a thermopile sensor, FHF05 generates a small output voltage proportional to this flux. It can only be used in combination with a suitable measurement system. Table 3.1.1 Specifications of FHF05 series (continued on next pages) FHF05 SERIES SPECIFICATIONS Sensor type...
  • Page 15 Table 3.1.1 Specifications of FHF05 series (started on previous pages) Sensing area FHF05-10X10 0.64 x 10 FHF05-15X30 2.70 x 10 FHF05-50X50 12.96 x 10 FHF05-15X85 7.10 x 10 FHF05-85X85 47.70 x 10 Sensing area length and width FHF05-10X10 (8 x 8) x 10...
  • Page 16 Table 3.1.1 Specifications of FHF05 series (started on previous pages) INSTALLATION AND USE Typical conditions of use in experiments, in measurements in laboratory and industrial environments. Exposed to heat fluxes for periods of several minutes to several years. Connected to user-supplied data acquisition equipment. Regular inspection of the sensor.
  • Page 17 2, 5 or 10 m length Separate black stickers BLK sticker to absorb radiation, to be applied by the user Separate gold sticker GLD sticker to reflect radiation, to be applied by the user FHF05 series manual v2204 17/43...
  • Page 18: Dimensions Of Fhf05 Series

    3.2 Dimensions of FHF05 series Figure 3.2.1 Models FHF05 15X30 and 15X85; Y = 27 or 70, dimensions in x 10 sensing area with thermal spreaders passive guard type T thermocouple dot indicating front side connection block for strain relief...
  • Page 19 Figure 3.2.2 Models FHF05 10X10, 50X50 and 85X85 heat flux sensor; Y = 8, 36 or 70, dimensions in x 10 sensing area with thermal spreaders passive guard type T thermocouple dot indicating front side connection block for strain relief cable, standard length C = 2 m FHF05 series manual v2204 19/43...
  • Page 20: Standards And Recommended Practices For Use

    Standards and recommended practices for use FHF05 series should be used in accordance with recommended practices. 4.1 Heat flux measurement in industry FHF05 sensors are often used to measure on industrial walls and metal surfaces, estimating the installation’s energy balance and the thermal transmission of walls.
  • Page 21: Installation Of Fhf05 Series

    Installation of FHF05 series 5.1 Site selection and installation Table 5.1.1 Recommendations for installation of FHF05 heat flux sensors Location choose a location that is representative of the process that is analysed if possible, avoid exposure to sun, rain, etc.
  • Page 22 Chapter See also our application note on how to install a heat flux sensor. FHF05 series manual v2204 22/43...
  • Page 23: Installation On Curved Surfaces

    Use sufficient tape to make sure the sensor remains fixed and in good thermal contact with curved surface. Avoid air gaps. Tape can be used over the sensing area when necessary. Table 5.2.1 Extra recommendations for installation of FHF05 series foil heat flux sensors on curved surfaces Bending...
  • Page 24: Electrical Connection

    [+] White thermocouple type T [−] thermocouple input [−] The sensor serial number and sensitivity are shown on the FHF05 series product certificate and on the end of FHF05’s cable. NOTICE Putting more than 24 Volt across the sensor wiring can lead to permanent damage to the sensor.
  • Page 25 [‒] or ground Brown thermocouple type T [+] White thermocouple type T [‒] The serial number and sensitivity of the individual sensors are shown on the FHF05 product certificate and at the end of FHF05’s cable. FHF05 series manual v2204 25/43...
  • Page 26 Table 5.3.3.3 The electrical connection of FHF05 for right 50 % signal WIRE MEASUREMENT SYSTEM heat flux signal [+] Black heat flux signal [−] voltage input [−] or ground Brown thermocouple type T [+] voltage input [+] White thermocouple type T [−] FHF05 series manual v2204 26/43...
  • Page 27: Requirements For Data Acquisition / Amplification

    Thermopile sensors are sensitive to the current that is used during open circuit detection. The current will generate heat, which is measured and will appear as a temporary offset. FHF05 series manual v2204 27/43...
  • Page 28: Maintenance And Trouble Shooting

    The preferred way to obtain a reliable measurement is a regular critical review of the measured data, preferably checking against other measurements. Table 6.1.1 Recommended maintenance of FHF05 series. If possible the data analysis is done on a daily basis MINIMUM RECOMMENDED HEAT FLUX SENSOR MAINTENANCE...
  • Page 29: Trouble Shooting

    6.2 Trouble shooting Table 6.2.1 Trouble shooting for FHF05 series General Inspect the sensor for any damage. Inspect the quality of mounting / installation. Inspect if the wires are properly attached to the data logger. Check the condition of the cable and wires.
  • Page 30: Calibration And Checks In The Field

    On-site field calibration is possible by comparison to a calibration reference sensor. Usually mounted side by side, alternatively mounted on top of the field sensor. Hukseflux main recommendations for field calibrations are: 1) to compare to a calibration reference of the same brand and type as the field sensor...
  • Page 31 FHF05 series manual v2204 31/43...
  • Page 32: Appendices

    Appendices 7.1 Appendix on cable and wire extension FHF05 series is equipped with one cable containing four wires. Standard cable length is 2 m. It is possible to order FHF05 with longer cable lengths or without any cable. A separate cable is available in 2, 5 or 10 m length.
  • Page 33: Appendix On Installation Of Fhf05 Sensor Foil

    7.2 Appendix on installation of FHF05 sensor foil FHF05 series can optionally be ordered without cable and without connection block. It is possible to order a separate cable. The user should ensure a good connection to the sensor by either soldering wires or alternatively, using a FFC / FPC ZIF connector. See Table 7.2.1 and 7.2.2 for recommendations.
  • Page 34 Table 7.2.1 recommendations for soldering FHF05 series sensor foils Wire use insulated wires of preferably at least AWG28 it is possible to orde a separate cable see Figure 7.2.1 for which material to use on which contact Preparation clean soldering pad before soldering with isopropyl alcohol (IPA)
  • Page 35 ZIF (Zero Insertion Force) Number of contacts 8 contacts, where only position 1, 3, 6 and 8 are used Pitch 1 x 10 External environment use FHF05 sensor foils with connector in a dry and stable environment FHF05 series manual v2204 35/43...
  • Page 36: Appendix On Using Fhf05 Series With Blk - Gld Sticker Series

    7.3 Appendix on using FHF05 series with BLK – GLD sticker series BLK black and GLD gold stickers are accessories to the FHF05 and FHF05SC heat flux sensors. A sensor equipped with a BLK black sticker is sensitive to both radiative and convective heat flux.
  • Page 37: Appendix On Standards For Calibration

    Table 7.3.1 Recommendations for use of FHF05 series heat flux sensors with BLK – GLD stickers Mounting when mounting an FHF05 with a BLK or GLD sticker, keep the directional sensitivity in mind heat flux from the back side to the front side (side with dot) generates a positive voltage output signal.
  • Page 38: Appendix On Calibration Hierarchy

    The Hukseflux HFPC method follows the recommended practice of ASTM C1130 - 21. It relies on a thin heater apparatus according to principles as described in Paragraph 4 of ASTM C1114 - 06, in the single sided mode of operation described in Paragraph 8.2 and...
  • Page 39: Appendix On Measurement Range For Different Temperatures

    MEASUREMENT RANGE HEATSINK TEMPERATURE (In 20 °C 46 x 10 W/m² 40 °C 39 x 10 W/m² 60 °C 32 x 10 W/m² 80 °C 25 x 10 W/m² 100 °C 18 x 10 W/m² FHF05 series manual v2204 39/43...
  • Page 40: Appendix On Temperature Measurement Accuracy

    Typically this is ± 1 °C. Thermocoupe measurement uncertainty The FHF05 series has a cable with thermocouple extension wires specified as a type T thermocouple, IEC 60584-1:2013 class 2. They consists of a brown positive copper (Cu) wire and a negative white constantan (Cu ) wire.
  • Page 41 Figure 7.8.1 model FHF05-50X50 with it’s thermocouple junctions. To minimise uncertainty, please make sure that ∆T is close to zero. FHF05 series manual v2204 41/43...
  • Page 42: Eu Declaration Of Conformity

    7.9 EU declaration of conformity Hukseflux Thermal Sensors B.V., Delftechpark 31, Delft, The Netherlands hereby declare under our sole responsibility that: Product model FHF05 series, all models* Product type Heat flux sensors is in conformity with the following directives: 2011/65/EU...
  • Page 43 © 2022, Hukseflux Thermal Sensors B.V. www.huksefluxusa.com Hukseflux Thermal Sensors B.V. reserves the right to change specifications without notice.

This manual is also suitable for:

Fhf05-10x10Fhf05-15x30Fhf05-15x85Fhf05-85x85

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