MANUAL M310 Blackbody Calibration Source
Confidential Information The material contained herein consists of information that is the property of LumaSense Technologies and intended solely for use by the purchaser of the equipment described in this manual. All specifications are subject to change without notice. Changes are made periodically to the information in this publication, and these changes will be incorporated in new editions.
Contents 1 General Information...................................................................................................... 5 1.1 Information about the user manual..................................................................... 5 1.1.1 Legend ................................................................................................................. 5 1.2 Safety ..................................................................................................................... 5 1.2.
6.6 Heater Element Replacement ............................................................................. 21 Index .................................................................................................................................. 23 Appendix A: Sample Communication Program ............................................................... 25 Appendix B: Calibration Methods ....................................................................................
1 General Information 1.1 Information about the user manual Congratulations on choosing the high quality and highly efficient Mikron blackbody. This manual provides important information about the instrument and can be used as a work of reference for installing, operating, and maintaining your blackbody. It is important that you carefully read the information contained in this manual and follow all safety procedures before you install or operate the instrument.
1.3 Limit of Liability and Warranty All general information and notes for handling, maintaining, and cleaning this instrument are offered according to the best of our knowledge and experience. All Mikron blackbodies from LumaSense Technologies have a regionally effective warranty period. Please check our website at http://info.LumaSenseinc.com/warranty for up-to-date warranty information.
Telephone +33 (0)3 88 98 98 01 Email: eusupport@LumaSenseinc.com 1.6 Shipments to LumaSense for Repair All RMA shipments of LumaSense Technologies instruments are to be prepaid and insured by LumaSense assigned shipper. For overseas customers, ship units air-freight, priority one. The instrument must be shipped in the original packing container or its equivalent. LumaSense Technologies is not responsible for freight damage to instruments that are improperly packed.
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2 Introduction 2.1 Description The M310 is a portable blackbody calibration source utilizing a digital indicating temperature controller that may be set to any temperature between ambient temperature to 350 °C (662 °F) [450 °C (842 °F) optional]. A precision RTD temperature sensor is embedded in the blackbody emitter providing high accuracy and repeatability. The temperature controller uses the industry standard PID algorithms to control the emitter temperature to within +/-0.1 °C.
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3 Installation 3.1 Location Select a stable location on which to place the M310. Since any blackbody source stability can be affected by moving air currents near the emitter, avoid locations where air currents are active such as near vents, walkways for people, etc. 3.2 Air Outlet Clearance The heating system requires constant air flow in the enclosure for proper operation. The air outlet (fan) on the rear panel must not be obstructed. Allow at least 3 inches clearance for the outlet region.
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4 Operation 4.1 Starting Up 1. Allow the M310 to warm-up to room temperature for at least two hours after unpacking and prior to applying power to remove any condensation. 2. Connect the power cable to a VAC service that matches the power requirement specification noted in the Technical Data section and on the Specification Label located on the rear of the M310. 3. Power the M310 by turning on the power switch on the front panel.
4.4 Changing Temperature Units (C-F, F-C) The controller has been locked out except for setpoint change to hinder tampering with important control settings. To unlock the controller: 1. Press SCROLL for 10 seconds. First CtrL will appear, then AcLu. 2. Press UP to display FACt on the lower display. 3. Press PAGE to exit. The controller is now unlocked. To change temperature units: 4. Press SCROLL and hold until InP appears. 5. Press SCROLL and hold until dSPL appears. 6.
8. Press UP to select according to chart below. 9. Press SCROLL and hold for 3 seconds to exit. Note: It is important to lock out the controller after making setting changes to prevent tempering. To lock out the controller: 1. Press SCROLL for 10 seconds to enter lockout set-up again. Display will show AcLu and FACt. 2. Press UP until USEr appears in lower display. 3. Press PAGE to exit- controller is locked out. 4.5.1 Available Communication Settings 4.
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5 Communications Port 5.1 RS232C This blackbody may have the option to communicate with the temperature controller via a PC or similar device. The DB-9 male connector is on the rear panel. Wiring is shown below. It is wired to operate with a standard through cable (not null modem). This method allows bi-directional data transfer via a three conductor cable consisting of signal ground, receive input and transmit output.
RS485 wiring The blackbody was shipped with the controller set at the following com port parameters: Baud: 1200 Data Bits: 7 Stop bits: 1 Parity: odd To alter these parameters, see Section 4.5. 5.3 Communication Command Set The complete command set is extensive. For the purpose of brevity, only a few important ones are shown here. For more information, the controller instruction manual may be requested from LumaSense.
Controller response: %0101R0902.000N8 Command line to change blackbody setpoint to 30C: $0101W0930.000F5 Controller response: %0101w100K2 Note that bold characters above represent the Checksum Actual characters may be different due to the calculation of checksum. Refer to the Appendices for a subroutine that calculates checksum for each writing string. Also note that checksum must be used in all communications.
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6 Maintenance 6.1 Cavity Life The life expectancy of the cavity depends on the time and temperature of operation. The higher the temperature, the shorter the life span. At temperatures near the upper end of the range, the life expectancy is shortened by approximately 30%. 6.2 Safety Interlocks Automatic shut-down will occur if the region near the cavity housing exceeds ~115°C. This thermal fuse must be replaced when over-temperature causes a shut down. The cooling fan will operate when power is on. 6.
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Index A Air Outlet Clearance 11 Apparent Emissivity 9 Appropriate use 9 M Maintenance 21 O B Operation 13 Background Influence 9 Baud Rate 14 P C Cavity life 21 Cleaning 21 Communication Command 18 Communication Settings 15 Communications Port 17 Packing 7 Parity 14 PID Tuning Constants 15 Push buttons 13 R D Repair 6, 7 RS-232C 11, 17 RS-485 17 Dimensions 10 Disposal 7 S F Fuse Locations 21 G General Information 5 H Safety 5 Safety Interlocks 21 Serial Communications 14 Service Request 6 S
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Appendix A: Sample Communication Program This is a typical QBASIC program that reads current temperature and increments setpoint at 10C intervals: This program is provided for example only for extraction of code lines for your use. It is not intended to be an attractive user interface program. It is, however, a working program.
PRINT USING "##.###"; getpval LOCATE 6, 40 PRINT "new setpoint in"; 10 - pvloop 'FOR x = 1 TO 20000: NEXT x NEXT pvloop NEXT setpoint PRINT #1, "$0101W0930.
Appendix B: Calibration Methods There are two distinctly different methods of calibration, each with its own application advantages. These methods are described as follows: Thermometric Method: In this method, the surface temperature of emitting surface is precisely measured and controlled. The sensor is an ultra precision platinum RTD that closely monitors the temperature of the emitting surface.
Emissivity (for M310, M315, M320, M316 series blackbodies) When measurements are required at wavelengths other than the one used for factory radiometric calibration, or if the calibration was done thermometrically (see above), the graph below provides emissivity vs. wavelength for this model. Integrating over the wavelength region of interest will provide the average emissivity for your measurement. If the blackbody was calibrated radiometrically, the apparent emissivity at 8-14µm was normalized to 1.0.
Infrablack 3 Coating on HT version (450C) mean emissivity=0.915 3-5um 1 8-14um e=0.970 0.99 0.98 0.97 emissivity 0.96 0.95 'emissivity' 8-12um e=0.969 0.94 0.93 0.92 0.91 0.9 0 5 10 15 20 25 30 Wavelength (um) When calibrating infrared sensors at wavelengths other than 8-14 µm region, the graph below displays the target effective emissivity vs. wavelength after factory radiance calibration is performed. Normalized emissivity for 350C version 1.02 1.01 1 effective emissivity 0.99 0.
Normalized emissivity after 8-14um radiance calibration on the HT (450C) version 1.02 1.01 1 0.99 0.98 0.97 e 0.96 0.95 0.94 0.93 0.92 0 5 10 15 20 25 30 Example 1: The HT (450 C) blackbody was factory calibrated to provide effective emissivity = 1.0 at 8-14 µm. You wish to use this source for a narrow band pyrometer at 7.5µm. At this wavelength from the graph above, the blackbody exit radiance will be approximately equivalent to a blackbody that has emissivity = 1.011.
Example 2: The standard (350 C) blackbody was factory calibrated to provide effective emissivity = 1.0 at 8-14 µm. You wish to use this source for an imager that has spectral response of 3-5 µm. The mean value between 3-5 µm from the graph above = 0.953. The blackbody exit radiance at 3-5 µm will be approximately equivalent to a blackbody that has emissivity = 0.953. This will cause your imager to receive 4.7% less infrared energy causing it to read a lower temperature.
Example 3: The HT (450 C) blackbody was factory calibrated to provide effective emissivity = 1.0 at 8-14 µm. You wish to use this source for an imager that has spectral response of 3-5 µm. The mean value between 3-5µm from the graph above = 0.943. The blackbody exit radiance at 3-5 µm will be approximately equivalent to a blackbody that has emissivity = 0.943. This will cause your imager to receive 5.7% less infrared energy causing it to read a lower temperature.
Using the M310 to calibrate “fixed emissivity” pyrometers For convenience, the table below shows what setpoint to use when calibrating pyrometers (infrared thermometers) that have fixed emissivity at 0.95 (and operate at 8-14 µm wavelength). This table assµmes the ambient and background are at 23 °C. If your pyrometer has adjustable emissivity, do not use this table and set your pyrometer emissivity to 1.0.
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Appendix C: CE Certification M310 Manual Appendix C: CE Certification 35
