Apogee Instruments SIF-111 Скачать руководство пользователя страница 7 | Manualshive

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Apogee Instruments SIF-111 Скачать руководство пользователя страница 7

Spectral Response

Spectral response of SIF series
infrared radiometers. Spectral
response (green line) is determined
by the germanium filter and
corresponds closely to the
atmospheric window of 8 to 14 µm,
minimizing interference from
atmospheric absorption/emission
bands (blue line) below 8 µm and
above 14 µm. Typical terrestrial
surfaces have temperatures that
yield maximum radiation emission
within the atmospheric window, as
shown by the blackbody curve for a
radiator at 28 C (red line).

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Содержание SIF-111

Страница 1: ...721 WEST 1800 NORTH LOGAN UTAH 84321 USA TEL 435 792 4700 FAX 435 787 8268 WEB APOGEEINSTRUMENTS COM Copyright 2020 Apogee Instruments Inc OWNER S MANUAL INFRARED RADIOMETER Models SIF 111 SIF 121 and SIF 1H1 Rev 28 Oct 2020 ...

Страница 2: ...e of Compliance 3 Introduction 4 Sensor Models 5 Specifications 6 Deployment and Installation 8 Cable Connectors 10 Operation and Measurement 11 Maintenance and Recalibration 16 Troubleshooting and Customer Support 17 Return and Warranty Policy 18 ...

Страница 3: ...nd laboratory use EMC requirements EN 50581 2012 Technical documentation for the assessment of electrical and electronic products with respect to the restriction of hazardous substances Please be advised that based on the information available to Apogee Instruments from the raw material suppliers the products manufactured by Apogee Instruments do not contain as intentional additives any of the res...

Страница 4: ...of icing conditions and terrestrial surface soil vegetation water snow temperature measurement in energy balance studies Apogee Instruments SIF series infrared radiometers consist of a thermopile detector germanium filter precision thermistor for detector reference temperature measurement and signal processing circuitry mounted in an anodized aluminum housing and a cable to connect the sensor to a...

Страница 5: ...put SIF 100 Series Voltage SI 100 Series Voltage SI 400 Series SDI 12 SI 131 or SI 431 SIF 121 SIF 111 Sensor model number and serial number are located on a label near the pigtail leads on the sensor cable If you need the manufacturing date of your sensor please contact Apogee Instruments with the serial number of your sensor SIF 1H1 ...

Страница 6: ...ment 2500 mV excitation typical other voltages can be used Calibration Uncertainty 30 to 65 C when target and detector temperature are within 20 C 0 2 C Calibration Uncertainty 40 to 80 C when target and detector temperate are different by more than 20 C see Calibration Traceability below 0 5 C Measurement Repeatability Less than 0 05 C Stability Long term Drift Less than 2 change in slope per yea...

Страница 7: ... corresponds closely to the atmospheric window of 8 to 14 µm minimizing interference from atmospheric absorption emission bands blue line below 8 µm and above 14 µm Typical terrestrial surfaces have temperatures that yield maximum radiation emission within the atmospheric window as shown by the blackbody curve for a radiator at 28 C red line ...

Страница 8: ...nwanted surfaces objects in the field of view thereby averaging unwanted temperatures with the target temperature see Field of View below Once mounted the green cap must be removed The green cap can be used as a protective covering for the sensor when it is not in use An Apogee Instruments model AM 220 mounting bracket is recommended for mounting the sensor to a cross arm or pole The AM 220 allows...

Страница 9: ... and angle combinations produce different target shapes and areas as shown below CIRCULAR HORIZONTAL FOV Area m Half Angle FOV Area m Type Model Half Angle 0 Deg 45 Deg 60 Deg Type Model Horizontal Vertical 0 Deg 45 Deg 60 Deg Standard SI 111 22 2 069 7 627 45 211 Standard SI 1H1 32 13 2 276 7 148 45 512 Narrow SI 121 18 1 337 4 461 18 865 Narrow SI 4HR 16 5 0 403 1 15 3 341 Ultra Narrow SI 131 14...

Страница 10: ... datalogger end of the cable If you ever need a replacement cable please contact us directly to ensure ordering the proper pigtail configuration Alignment When reconnecting your sensor arrows on the connector jacket and an aligning notch ensure proper orientation Disconnection for extended periods When disconnecting the sensor for an extended period of time from a station protect the remaining hal...

Страница 11: ... electrically isolated bipolar polarity is dependent on temperature difference between sensor and target signal in the microvolt range and requires a high resolution differential measurement The voltage output from the thermistor can be measured with a single ended measurement In order to maximize measurement resolution and signal to noise ratio the input range of the measurement device should clo...

Страница 12: ...of the blackbody cone but are thermally insulated from the cone Detector and target temperature are controlled independently At each calibration set point detectors are held at a constant temperature while the blackbody cone is controlled at temperatures below 12 C above 18 C and equal to the detector temperature The range of detector temperatures is 15 C to 45 C set points at 10 C increments Data...

Страница 13: ...ivity Increasing the excitation voltage will increase thermistor measurement sensitivity but will also increase self heating and current drain The internal thermistor provides a temperature reference for calculation of target temperature Resistance of the thermistor changes with temperature Thermistor resistance RT in Ω is measured with a half bridge measurement requiring an excitation voltage inp...

Страница 14: ... 2 C m D 2 D 0 C T 1 C T 2 C b D 2 D Where C2 C1 and C0 are the custom calibration coefficients listed on the calibration certificate shown above that comes with each SIF 100 series radiometer there are two sets of polynomial coefficients one set for m and one set for b Note that TD is converted from Kelvin to Celsius temperature in C equals temperature in K minus 273 15 before m and b are plotted...

Страница 15: ...q 2 to solve for TTarget yields the equation used to calculate the actual target surface temperature i e measured brightness temperature corrected for emissivity effects 4 4 Background 4 Sensor et arg T T 1 T T Equations 1 3 assume an infinite waveband for radiation emission and constant ε at all wavelengths These assumptions are not valid because infrared radiometers do not have infinite waveband...

Страница 16: ...sually a larger problem in windy environments Dust and dirt are best removed with deionized water rubbing alcohol or in extreme cases acetone 4 Spiders insects and or nests in the aperture leading to the filter If spiders insects are a problem repellent should be applied around the aperture entrance not on the filter Clean inner threads of the aperture and the filter with a cotton swab dipped in t...

Страница 17: ...target and detector depending on specific model Thus a compatible measurement device e g datalogger or controller should have resolution of at least 0 75 µV 0 00075 mV in order to produce temperature resolution of 0 05 C Measurement of detector temperature from the internal thermistor requires an input excitation voltage where 2500 mV is recommended A compatible measurement device should have the ...

Страница 18: ...r factory The warranty does not cover equipment that has been damaged due to the following conditions 1 Improper installation or abuse 2 Operation of the instrument outside of its specified operating range 3 Natural occurrences such as lightning fire etc 4 Unauthorized modification 5 Improper or unauthorized repair Please note that nominal accuracy drift is normal over time Routine recalibration o...

Страница 19: ...anship Apogee Instruments will repair or replace the items free of charge If it is determined that your product is not covered under warranty you will be informed and given an estimated repair replacement cost PRODUCTS BEYOND THE WARRANTY PERIOD For issues with sensors beyond the warranty period please contact Apogee at techsupport apogeeinstruments com to discuss repair or replacement options OTH...

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