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Related Manuals for Apogee SIL-411
Summary of Contents for Apogee SIL-411
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Page 1: Owner's Manual
OWNER’S MANUAL COMMERCIAL INFRARED RADIOMETER Models SIL-411 Rev: 28-Oct-2020 APOGEE INSTRUMENTS, INC. | 721 WEST 1800 NORTH, LOGAN, UTAH 84321, USA TEL: (435) 792-4700 | FAX: (435) 787-8268 | WEB: APOGEEINSTRUMENTS.COM Copyright © 2020 Apogee Instruments, Inc. -
Page 2: Table Of Contents
TABLE OF CONTENTS Owner’s Manual ....................................1 Declaration of Conformity ............................... 3 Introduction ..................................... 4 Sensor Models ..................................5 Specifications ................................... 6 Deployment and Installation ..............................7 Operation and Measurement ..............................9 Maintenance and Recalibration ............................. 17 Troubleshooting and Customer Support ..........................18 Return and Warranty Policy .............................. -
Page 3: Declaration Of Conformity
RoHS 3 compliant using exemption 6c. Further note that Apogee Instruments does not specifically run any analysis on our raw materials or end products for the presence of these substances, but rely on the information provided to us by our material suppliers. -
Page 4: Introduction
(soil, vegetation, water, snow) temperature measurement in energy balance studies. Apogee Instruments SIL-111 infrared radiometers consist of a thermopile detector, germanium filter, precision thermistor (for detector reference temperature measurement), signal processing circuitry mounted in an anodized aluminum housing, and a cable to connect the sensor to a measurement device. -
Page 5: Sensor Models
Voltage 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. -
Page 6: Specifications
UV stability, flexibility in cold conditions); pigtail lead wires Calibration Traceability Apogee SI series infrared radiometers are calibrated to the temperature of a custom blackbody cone held at multiple fixed temperatures over a range of radiometer (detector/sensor body) temperatures. The temperature of the blackbody cone is measured with replicate precision thermistors thermally bonded to the cone surface. -
Page 7: Deployment And Installation
An Apogee Instruments model AM-250 mounting bracket is recommended for mounting the sensor to a cross arm or pole. The AM-250 allows adjustment of the angle of the sensor with respect to the target and accommodates... - Page 8 SIL-111 22° 0.51 1.90 11.26 SIL-111 22° 2.05 7.58 45.0 SIL-111 22° 4.62 17.1 101.3 A simple FOV calculator for determining target dimensions based on infrared radiometer model, mounting height, and mounting angle, is available on the Apogee website: https://www.apogeeinstruments.com/irr-calculators.
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Page 9: Operation And Measurement
OPERATION AND MEASUREMENT All SIL-411 radiometers have an SDI-12 output, where target and detector temperatures are returned in digital format. Measurement of SIL-411 series radiometers requires a measurement device with SDI-12 functionality that includes the M or C command. Wiring for SIL-411 White: SDI-12 Data Line Red: Power In (4.5-24 V DC) - Page 10 Sensor Calibration Apogee SIL-111 infrared radiometers are calibrated in a temperature-controlled chamber that houses a custom- built blackbody cone (target) for the radiation source. During calibration, infrared radiometers (detectors) are held in a fixture at the opening of the blackbody cone, but are thermally insulated from the cone. Detector and target temperature are controlled independently.
- Page 11 SDI-12 Interface The following is a brief explanation of the serial digital interface SDI-12 protocol instructions used in Apogee SIL- 411 infrared radiometers. For questions on the implementation of this protocol, please refer to the official version of the SDI-12 protocol: http://www.sdi-12.org/specification.php...
- Page 12 where a is the sensor address (“0-9”, “A-Z”, “a-z”) and M is an upper-case ASCII character. The target temperature and sensor body temperature are separated by the sign “+” or “-“, as in the following example (0 is the address): Command Sensor Response Sensor Response when data is ready...
- Page 13 Command Response Description aAb! b<cr><lf> Change the address of the sensor where a is the current (old) sensor address (“0-9”, “A-Z”), A is an upper-case ASCII character denoting the instruction for changing the address, b is the new sensor address to be programmed (“0-9”, “A-Z”), and ! is the standard character to execute the command.
- Page 14 The format of the response is the same as if the sensor is making a measurement. For the Verification Command and Measurement Commands, the response is atttn<CR><LF>. For the C Command, it is atttnn<CR><LF>. For the High Volume Commands, it is atttnnn<CR><LF>. The address is indicated by a, the time in seconds to make the measurement is indicated by ttt, and the number of measurements is indicated by n, nn, and nnn.
- Page 15 Target Temperature Measurement SIL-411 infrared radiometers have an SDI-12 output. The following equations and the custom calibration coefficients described in this section are programmed into the microcontroller. Target temperature is output directly in digital format. The detector output from SIL-411 radiometers follows the fundamental physics of the Stefan-Boltzmann Law, where radiation transfer is proportional to the fourth power of absolute temperature.
- Page 16 where E is radiance [W m ] detected by the radiometer, E is radiance [W m ] emitted by the Sensor Target target surface, E is radiance [W m ] emitted by the background (when the target surface is outdoors Background the background is generally the sky), and ε...
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Page 17: Maintenance And Recalibration
Use only gentle pressure when cleaning the filter with a cotton swab, to avoid scratching the outer surface. The solvent should be allowed to do the cleaning, not mechanical force. It is recommended that infrared radiometers be recalibrated every two years. See the Apogee webpage for details regarding return of sensors for recalibration (http://www.apogeeinstruments.com/tech-support-recalibration-... -
Page 18: Troubleshooting And Customer Support
SDI-12 protocol limits cable length to 60 meters. For multiple sensors connected to the same data line, the maximum is 600 meters of total cable (e.g., ten sensors with 60 meters of cable per sensor). See Apogee webpage for details on how to extend sensor cable length (http://www.apogeeinstruments.com/how-to-make-a-... -
Page 19: Return And Warranty Policy
RETURN AND WARRANTY POLICY RETURN POLICY Apogee Instruments will accept returns within 30 days of purchase as long as the product is in new condition (to be determined by Apogee). Returns are subject to a 10 % restocking fee. WARRANTY POLICY... - Page 20 84321, USA 5. Upon receipt, Apogee Instruments will determine the cause of failure. If the product is found to be defective in terms of operation to the published specifications due to a failure of product materials or craftsmanship, Apogee Instruments will repair or replace the items free of charge.
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