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Summary of Contents for Hukseflux IHF02
- Page 1 Hukseflux Thermal Sensors USER MANUAL IHF02 Ultra sensitive industrial heat flux sensor Copyright by Hukseflux | manual v1907 | www.hukseflux.com | info@hukseflux.com...
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Page 2: Warning Statements
Do not apply a point load on the sensor. Twisting the metal sheathed cable might damage it. Only for supply with the optional CE type examination (ATEX) certificate: ask the supplier for ATEX rated operating conditions. IHF02 manual v1907 2/35... -
Page 3: Table Of Contents
Introduction Ordering and checking at delivery Ordering IHF02 Included items Quick instrument check Instrument principle and theory Specifications of IHF02 Specifications of IHF02 Dimensions of IHF02 Standards and recommended practices for use Heat flux measurement in industry Installation of IHF02... -
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 the object on which IHF02 is mounted heatsink maximum allowed value maximum IHF02 manual v1907 4/35... -
Page 5: Introduction
It is suitable for long-term use at one location as well as surveys at multiple locations. IHF02 measures heat flux through the object on which it is mounted, in W/m as well as the temperature in °C. An optional magnet frame is offered for easy mounting on magnetic surfaces. - Page 6 500 °C. The low-temperature extension cable has a jacket of PTFE type plastic. Operation Using IHF02 is easy. It can be connected directly to commonly used data logging systems. The heat flux, Φ, in W/m , is calculated by dividing the IHF02 output, a small voltage U, by the sensitivity S.
- Page 7 Figure 0.2 IHF02 industrial heat flux sensor mounted on an object using spring-loaded bolts (on the left), and with IHF02’s easy-to-use optional magnet frame (on the right). The instrument is suitable for long-term use at one location as well as for survey purposes at multiple locations, also outdoor.
- Page 8 • our complete range of heat flux sensors • industrial heat flux sensors (PDF) Figure 0.3 IHF02 with its optional magnet frame for easy mounting on magnetic surfaces IHF02 manual v1907 8/35...
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Page 9: Ordering And Checking At Delivery
Ordering and checking at delivery Ordering IHF02 The standard configuration of IHF02 is with 1 metre high-temperature cable and 3 metres low-temperature extension cable. Common options are: magnet frame for easy mounting on magnetic surfaces, suitable for survey purposes •... -
Page 10: Quick Instrument Check
Also look at the reaction of the thermocouple to heat. 3. Inspect the instrument for any damage. 4. Check the sensor serial number engraved on the transition piece against the certificate provided with the sensor. IHF02 manual v1907 10/35... -
Page 11: Instrument Principle And Theory
U, to a heat flux Φ, the voltage must be divided by the sensitivity S, a constant that is supplied with each individual sensor. The temperature sensor inside IHF02 is a type K thermocouple located at the side of the sensor flush with the flanges. - Page 12 The user should analyse his own experiment and make his own uncertainty evaluation. Figure 2.2 IHF02: the heat flux sensor consists of a stainless steel body (1) which is connected via a rigid stainless steel coupler (3) to a flexible high-temperature metal sheathed cable with interlocked spiral stainless steel armour (6).
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Page 13: Specifications Of Ihf02
Specifications of IHF02 Specifications of IHF02 IHF02 measures the heat flux density through the surface of the sensor. This quantity, expressed in W/m , is called heat flux. It also measures the instrument body temperature. IHF02 is passive, using thermopile and thermocouple sensors. The thermopile generates a small output voltage proportional to the heat flux. - Page 14 Table 3.1 Specifications of IHF02 (started on previous page) Rated operating pressure 10 bar (clamping on transition piece or low temperature extension cable) In case of higher process pressure, contact Hukseflux Maximum load on sensor 1000 kg (homogeneously distributed) Sensor diameter...
- Page 15 Table 3.1 Specifications of IHF02 (started on previous 2 pages) Recommended recalibration interval 2 years Calibration reference conditions 25 °C, heat flux of 6 x 10³ W/m , mounted on a water- cooled aluminium heat sink, thermal conductivity of the surrounding environment 0.0 W/(m·K)
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Page 16: Dimensions Of Ihf02
Dimensions of IHF02 Figure 3.2.1 IHF02 industrial heat flux sensor dimensions in x 10 m. T marks the location of the temperature measurement See the chapter on installation of IHF02 for dimensions of the optional magnet frame. IHF02 manual v1907 16/35... -
Page 17: Standards And Recommended Practices For Use
In such cases reproducibility is more important than absolute measurement accuracy. Figure 4.1.1 Example of an IHF02 industrial heat flux sensor mounted on an object to be measured using spring-loaded bolts. The sensor is mounted on a well prepared flat surface. -
Page 18: Installation Of Ihf02
M6 thread to the surface on which IHF02 is mounted at a centre-to-centre distance of 55 x 10 m and fix the sensor with a nut. - Page 19 Figure 5.1.1 IHF02 showing its two flanges allowing installation on tack-welded M6 threads or with spring-loaded bolts (not included with IHF02). IHF02 should be mounted on a well-prepared flat surface Following the recommendations for installation of IHF02 heat flux sensors, there are three ways to mount the sensor on the object to be measured.
- Page 20 Figure 5.1.3 Installation of IHF02 using spring-loaded bolts spring-loaded M6 bolt spring IHF02 side of object to be measured, flush with flanges heat flux generating positive signal for long-term installation, apply high-temperature thread paste or a graphite packing material mounting flange...
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Page 21: Use Of The Magnet Frame
IHF02 comes with an optional magnet frame for easy mounting on magnetic surfaces. The frame is suitable for survey purposes as well as for permanent mounting. Figure 5.2.1. IHF02 industrial heat flux sensor mounted on an object using its optional magnet frame Figure 5.2.2 IHF02 with its optional magnet frame... - Page 22 Figure 5.2.3 IHF02 with optional magnet frame. The magnet frame’s two magnets (1), spring-loaded bolts and housing (3) ensure the IHF02 sensor (2) can be positioned easily and firmly on the object to be measured. The interlocked spiral stainless steel armoured high-temperature cable (4) is held in place by the cable strain relief (5).
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Page 23: Electrical Connection
A heat flux sensor should be connected to a measurement system, typically a so-called datalogger. IHF02 is a passive sensor that does not need any power, neither for the heat flux sensor, nor for the temperature sensor. Cables may act as a source of distortion, by picking up capacitive noise. -
Page 24: Requirements For Data Acquisition / Amplification
IHF02 are available. Table 5.4.1 Requirements for data acquisition and amplification equipment for IHF02 in the standard configuration Capability to measure small voltage preferably: <... -
Page 25: 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 IHF02. If possible the data analysis is done on a daily basis... -
Page 26: Trouble Shooting
Inspect the connection of the shield (typically connected at the datalogger side). Check the datalogger program in particular if the right sensitivity is entered. IHF02 serial number is engraved on the side of the sensor body. The sensitivity can be found on the product certificate. -
Page 27: 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 2) to connect both to the same electronics, so that electronics errors (also offsets) are eliminated. - Page 28 IHF02 manual v1907 28/35...
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Page 29: Appendices
IHF02 is equipped with a high temperature cable and a low temperature extension cable. The standard configuration of IHF02 is with 1 m high temperature cable and 3 m low temperature extension cable. Cable length of both cable types can be specified when ordering. -
Page 30: Appendix On Calibration Hierarchy
0.9. IHF02 can be delivered with the black coating on the top side of the sensor as an option. In that case, add -BC to the IHF02 order code. The temperature range of the sensor is reduced to -30 to +650 °C. -
Page 31: Appendix On Correction For Temperature Dependence
Φ = U/(S∙(1 - 0.0003∙(T – 25))) (Formula 7.5.1) with Φ the heat flux in W/m², U the IHF02 voltage output in V, S the sensitivity in V/(W/m²) at 25 °C and T the IHF02 temperature. S is shown on the product certificate. -
Page 32: Appendix On Measurement Range For Different Temperatures
Appendix on measurement range for different temperatures The measurement range of IHF02 is specified as (-100 to +100) x 10³ W/m² at 20 °C heatsink temperature. This is a very conservative specification. In reality, the maximum temperature of +900 °C is the limiting specification. The sensor temperature T in °C in a specific situation depends on the heatsink temperature T... -
Page 33: Appendix On Use In (Potentially Explosive) Environments
Appendix on use in (potentially explosive) environments IHF02 is optionally supplied with a product certificate specifying the ATEX rating as II 2 G EEx d IIC T6. The formal equipment model names of the IHF02 is LEX35A. The final letter specifies the... -
Page 34: Eu Declaration Of Conformity
EU declaration of conformity Hukseflux Thermal Sensors B.V. Delftechpark 31 2628 XJ Delft The Netherlands in accordance with the requirements of the following directive: 2011/65/EU The Restriction of Hazardous Substances Directive hereby declare under our sole responsibility that: Product model:... - Page 35 © 2019, Hukseflux Thermal Sensors B.V. www.hukseflux.com Hukseflux Thermal Sensors B.V. reserves the right to change specifications without notice.
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