HF03 / LI19 manual v1215 - Hukseflux - Thermal Sensors
Contents
1. 0 Figure 3 4 LI19 sensor settings screen Press Select Sensor and select HF03 Select the appropriate calibration figure for the HF03 that is used This will be around 95 resulting in a multiplier of 2000 and a divider of around 1900 The LI19 is now ready for use It is suggested to make a sticker on the LI19 stating that the calibration is 95 HF03 LI19 manual v1215 page 11 16 Hukseflux Thermal Sensors 4 Putting HFO3 LI19 into use It is recommended to test if the sensor works according to the following table estimated time needed 5 minutes Remove cap on the HF03 so that the black surface of HF03 shows up Switch LI19 on The on off button is located on top of the LI19 It needs to be pressed to reach a level below the plastic surface to remain on Connect LI19 to a PC using the USB The program does not connection block Make contact connect to the LI19 if through the LI19 software the LI19 is switched off Check the sensor settings in the LI19 LI9 is now ready for use software against the HF03 calibration value see HF03 certificate and sticker on the sensor Disconnect the USB connection block and the PC Connect the HF03 wire is white The HF03 LI19 is now white wire should be connected to the ready for use red plug the black wire to the black plug Darken the sensor for instance by putting the sensor upside down on a table The reading should be anywhere between 50 and 50 W m2. 0 1 L119 connected to HF03 Heat flux sensor surface 11 metal heat sink 10 plastic grip 9 polyurethane cable 7 Operation 1 switch on LI19 connect HF03 2 connect LI19 to PC using USB connection box and LI19 software 3 check sensor settings 4 disconnect from PC 5 optional mark settings on LI19 6 remove HF03 cap 7 start measurement 8 switch off LI19 Delivery HF03 LI19 2 spare batteries Transport casing USB connection box cap HF03 Software should be downloaded from http www leiderdorpinstruments nl HF03 LI19 manual v1215 page 6 16 Hukseflux Thermal Sensors 1 Specifications of HF03 LI19 The HF03 is a heat flux sensor that can be used in mobile applications It is combined with LI19 a high accuracy hand held read out unit that can be used both for mobile measurements and as an amplifier directly connected to a PC It is supplied with a transport case HFO3 LI19 GENERAL SPECIFICATIONS Heat flux range for up to 10 kW m HFO3 Exposure time for 10 minutes max HFO3 Heat flux range for up to 2 kW m LI19 Exposure time for indefinite LI19 Cable length 5m response time 1 s nominal value Temperature range 30 to 80 C A D resolution 1 or 10 uV or 0 1 kW m Software To be downloaded from http www leiderdorpinstruments nl Display functions actual values Weight LI19 plus HF03 1 kg Including transport ca
3. applications It is combined with LI19 a high accuracy hand held read out unit that can be used both for mobile measurements and as an amplifier directly connected to a PC The combination HF03 LI19 is typically used to study heat flux levels around flares and fires and to calibrate flare radiation monitors flare heat flux sensors The HF03 is a heat flux sensor of the type that is commonly used in fire testing The HF03 housing and sensor are designed to be suitable for short 10 minute observation of high flux environments up to 10 kW m LI19 is suitable for normal exposure only up to 2 kW m LI19 is used to display the measured flux level for attaining that the sensitivity of HF03 is entered into the LI19 by programming it using a PC USB connection is part of the delivery Software should be downloaded via internet this is to ensure that the latest version is applied The applied site is http www leiderdorpinstruments nl The LI19 is battery powered using 2 AA type batteries These are included in the delivery Batteries allow 50 days of operation HF03 LI19 is not rated for EEx environments nevertheless it is admitted in many cases because the instrument operates on 3VDC only HF03 LI19 manual v1215 page 5 16 Hukseflux Thermal Sensors 50 0749 E E KO ME LI 19 Figure
4. 2 reading proportional to temperature difference table sensor with 50 W m2 around 10 degrees difference Check if the sensor reacts to heat flux The thermopile should Expose the sensor to radiation of lamp react by generating a on desk or to solar radiation millivolt output signal Preferably in indoor environment no wind The reading should reach a stable value direct solar beam radiation is typically 700 W m2 on a clear day direct plus diffuse max 1300 W m2 lamp radiation at a level that feels warm with the hand around 1000 W m2 Table 4 1 Checking the functionality of the sensor The procedure offers a simple test to get a better feeling how HF03 LI19 works and a check if the sensor is OK HF03 LI19 manual v1215 page 12 16 Hukseflux Thermal Sensors 5 Maintenance of HF03 HF03 and LI19 are virtually maintenance free In case this is necessary HF03 can be cleaned with water or mild alcohol LI19 consumes power Batteries must be replaced on a regular basis At regular intervals the quality of the cables can be checked On a 2 yearly interval the calibration can be checked in an indoor facility Figure 5 1 Battery replacement of LI19 HF03 LI19 manual v1215 page 13 16 Hukseflux Thermal Sensors 6 Electrical connection of HF03 Wire Colour Measurement system LI19 Sensor output White Red connector Sensor output Black Black co
5. HFOS LI19 PORTABLE HEAT FLUX SENSOR WITH READ OUT UNIT USER MANUAL HF03 LI19 manual v1215 Edited amp Copyright by Hukseflux Thermal Sensors http www hukseflux com e mail info hukseflux com Hukseflux Thermal Sensors Hukseflux Thermal Sensors Warnings and safety issues HF03 LI19 is NOT certified for EEx environments HF03 is designed for fluxes up to 10 kW m LI19 is suitable for normal exposure only up to 2 kW m Make sure that LI19 is switched off whenever it is not used Make sure to have spare batteries available whenever using LI19 Make sure to have read the LI19 manual before using LT19 LI19 software is not supplied with the instrument It should be downloaded from http www leiderdorpinstruments nl HF03 LI19 manual v1215 page 2 16 Hukseflux Thermal Sensors Contents List of symbols Introduction Specifications of HF03 LI19 General Theory Short user guide Putting HF03 LI19 into use Maintenance of HF03 Electrical connection of HF03 Appendices 7 1 Appendix on trouble shooting 7 2 Allowable levels N A UI D W N Ha 4 ja ja ja ANnVUAWNOUO ON UA HF03 LI19 manual v1215 page 3 16 Hukseflux Thermal Sensors List of symbols Heat flux o Wm Voltage output Vsen V HF03 sensitivity Esen UV Wm HFO3 LI19 manual v1215 page 4 16 Hukseflux Thermal Sensors Introduction The HFO3 is a heat flux sensor that can be used in mobile
6. f a measurement with HF03 depends on many factors but most of all on 1 the intensity of the radiation 2 wind effects HF03 is calibrated with a radiant source under conditions of natural convection i e no wind The wind can play a large role in determining the end result of the heat flux measurement and also in discrepancies between measurement results of one sensor type and another because surface temperatures on different sensors will deviate from each other The guantification of this effect is strongly dependent on the circumstances However deviations of up to 20 have been reported for different sensor designs although these were calibrated under the same conditions HF03 LI19 manual v1215 page 8 16 Hukseflux Thermal Sensors 3 Short user guide 0 unpack 0 1 in case this is not done before download software from http www leiderdorpinstruments nl products LI19 more downloads 0 2 in case this was not done before take the plastic units strip and cut off the units that are required The small strip can be placed on the LI19 front below that display 1 switch on LI19 connect HF03 2 connect LI19 to PC using USB connection box and LI19 software 3 check sensor settings 4 disconnect from PC 5 optional mark settings on LI19 6 remove HF03 cap 7 start measurement 8 switch off LI19 Figure 3 1 L119 screen at startup Typically the front of the LI19 should have the sensor information copied po
7. nnector Shield steel Not conected Table 6 1 The electrical connection of HF03 to LI19 Figure 6 1 Connectors on LI19 and on off switch HF03 LI19 manual v1215 page 14 16 Hukseflux Thermal Sensors 7 Appendices 7 1 Appendix on troubleshooting This paragraph contains information that can be used to make a diagnosis whenever the sensor does not function The sensor 1 check functionality according to table 4 1 does not give 2 if the sensor does not work measure sensor any signal impedance across the black and white wires using a multimeter in a situation that the sensor is not exposed to radiation The value should not be zero this indicated a broken circuit The value also should not read infinite Report the resistance value back to Hukseflux 2 Check if the sensor reacts to an enforced heat flux A 100 Watt lamp mounted at 10 cm distance should give a definite reaction 3 Check the data acquisition apply a mV source to the LI19 in the 1 mV range The sensor 1 Check if the right calibration factor is entered signal is un into the algorithm Please note that each sensor realistically has its own individual calibration factor high or low 2 Check the condition of the leads at the logger 3 Check the cabling condition looking for cable breaks 4 Check the data acquisition by applying a mV source to it in the 1 mV range The sensor 1 Check the presence of strong sources of signal shows electromagne
8. sing 2 5 kg Transport casing dimensions 30 x 40 x 12 cm approximately power supply Two AA Type batteries Alkaline Transport casing supplied with the instrument Sensor sensitivity 0 1 MV kW m At 1000 W m 100 uV At 100 kW m 10 mV Sensor field of view Around 180 degrees Sensor protection Removable cap CALIBRATION Calibration NIST traceability Recalibration interval Every 2 years Table 1 1 List of HF03 LI19 specifications HF03 LI19 manual v1215 page 7 16 Hukseflux Thermal Sensors 2 General Theory The HF03 s main component is a heat flux sensor The sensor is located under the black surface on the front of the HF03 It is mounted on a metal heat sink which is in turn protected by a plastic housing The heat flux sensor generates a small voltage signal that is a linear function of the incoming radiant and convective heat flux Using HF03 is easy For readout one only needs an accurate voltmeter that works in the millivolt range To convert the measured voltage Vsen to a heat flux o the voltage must be divided by the sensitivity Esen a constant that is supplied with each individual sensor p Vsen Esen 2 1 The sensitivity of HF03 is supplied with each individual instrument and can be found on its calibration certificate HF03 is read out by LI19 which essentially is a voltmeter in which a calibration factor can be entered to show watt per meter sguare Expected accuracy The expected accuracy o
9. ssibly on a sticker HF03 LI19 manual v1215 page 9 16 Hukseflux Thermal Sensors Figure 3 2 LI19 connected to the USB connection box Installation of the LI19 program will typically be done automatically by the windows installer In case older program versions are present one might need to uninstall earlier versions If the LI19 program is opened the LI19 must be connected using the USB connection box The control untilities will automatically recognise the LI19 and the window as shown in figure 3 3 will open giving the message that the unit is connected HF03 LI19 manual v1215 page 10 16 Hukseflux Thermal Sensors 400000145 connected Sensor settings 1 Datalogger View datalogger status Status Remaining interval Data logger programming Minimum Integral Maximum Wu e Delay logging until 13 57 Read the data from the datalogger Erase and start the datalogger W Figure 3 3 LI19 software screen Press sensor settings 400000145 connected Sensor settings Datalogger Multiplier Divider Input amplifier 2000 1900 C 1x range 200mV in 20 000 counts E a C 2x range 100mV in 10 000 counts Decimal dot position C gena 9888 C 4x range 50m in 5 000 counts C 8888 C 8 888 8x range 25mV in 25 000 counts 16x range 12 5mV in 12 500 counts 32x range B 25mV in 5 250 counts Negative values IV Allowed Program
10. tic radiation radar radio etc unexpected 2 Check the condition of the sensor cable variations Table 7 1 1 Troubleshooting for HF03 LI19 HF03 LI19 manual v1215 page 15 16 Hukseflux Thermal Sensors 7 2 Allowable levels An indication of allowable heat flux levels for personel and eguipment can be found below static Btu Hr Ft kW m Eguipment 3000 9 5 Human Run 2000 6 3 Human Walk 1500 4 7 Human Work 500 1 6 Figure 7 2 1 Allowable heat flux levels 7 3 Datalogging LI19 can also be used as a datalogger In case you need this capability the LI19 manual can be obtained from http www leiderdorpinstruments nl HF03 LI19 manual v1215 page 16 16
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