MODEL M67/M67S SERIES INFRARED TEMPERATURE TRANSMITTER MANUAL FOR OPERATION AND MAINTENANCE SPECIAL FEATURES OR MODIFICATIONS M67 M67S M67LR LASER AIMING VERSION (Laser output: 630 to 650nm at <1mW, CDRH Class II) Your Infrared Thermometer may have special features or modifications to suit it for your particular application. If so, the box below will be checked. Your Infrared Thermometer has special features or modifications. Drawing Number Approved: 11180-16 Rev.
M67, M67S Manual 1. LIMITED WARRANTY .....................................................................................................................5 2. UNPACKING AND INSPECTION ....................................................................................................5 2.1 3. STORAGE ..........................................................................................................................................5 DESCRIPTION .....................................................
M67, M67S Manual 10.1.5 Checking for background radiation/reflections .................................................................35 10.1.6 Set emissivity ......................................................................................................................35 10.1.7 Stabilization .......................................................................................................................36 10.2 CURRENT/TEMPERATURE RELATIONSHIPS FOR LINEAR OUTPUT ...............................
M67, M67S Manual 1. Limited warranty /XPD6HQVH 7HFKQRORJLHV ,QF will repair or replace at its plant any parts or materials found defective, due to flaws in design or manufacture, when reported in writing within one year from date of shipment. Instruments to be repaired under this warranty are to be returned to the factory, freight pre-paid by the user, who assumes all risk and cost of shipping to and from the plant.
M67, M67S Manual Depending on the physical distance between the object and the INFRADUCER, and on the physical environment in which the INFRADUCER is located, a variety of designs and accessories are available to meet even the most stringent requirements. 3.3 The M67 product family The M67 product line has two, configurations, the M67 and the M67S. The M67 is the basic infrared thermometer, operating from the industry standard, 2 wire, 4-20 milliampere current loop.
M67, M67S Manual Figure 2 - Transmission, Absorption, and Reflection of Infrared Energy. Figure 2 shows the three modes by which the radiant energy striking an object may be dissipated: a= absorption t= transmission r= reflection The fractions of the total radiant energy, which are associated with each of the above modes of dissipation, are referred to as the absorptivity (a) transmissivity (t) and the reflectivity (r) of the body. According to the theory of conservation of energy.
M67, M67S Manual It should be noted that every hot object transmits radiant energy over a spectrum of wavelength. This radiation is of maximum intensity at a particular wavelength depending on the temperature of the object. In general, the hotter the object, the shorter the wavelength at which the radiation intensity is highest. This phenomenon is explained by the following law, which is shown graphically in Figure 3.
M67, M67S Manual 4.2 Application to temperature measurement Only, thermal radiation from the object being measured should enter the INFRADUCER. Otherwise, the electrical current generated by the infrared detector will no longer be dependent strictly on the temperature of the object in question. Thus, it is important to shield the instrument if necessary from extraneous sources of thermal radiation.
M67, M67S Manual 5. Explanation of basic model and options The complete model number of your INFRADUCER is written on the first page of this manual and also on the specification label attached to the body of the INFRADUCER. (see Figure 1, page 6). The key to each block is as follows: (refer to Figure 4, page 10).
M67, M67S Manual Block (4) OUTPUT TYPE: The electrical output from the INFRADUCER is classified according to whether or not it is linear or according to the thermocouple type as follows: L: Linear 4-20 mA output. U Any non-standard output (must be specified in writing). Output typically is proportional to infrared radiation curves. When this type of output is supplied, the appropriate table showing the output as a function of temperature of the source will be provided.
M67, M67S Manual 6. Pre-installation guide This section describes briefly, various concepts, which govern the successful application of the INFRADUCER. It is worthwhile studying this section carefully to ensure that you will obtain the most accurate readings from the instrument. 6.1 Focus To ensure that the radiation received by the INFRADUCER comes from the desired target and nowhere else, an optical focusing system has been employed in the design.
M67, M67S Manual 6.3 Background radiation influence It is assumed that 98% of the area seen by the INFRADUCER corresponds to the target at the stated minimum target diameter. The remaining 2% is assumed to be background. To eliminate the possibility of any background radiation entering the INFRADUCER, the diameter of the target should be at least 50% greater than the minimum target diameter.
M67, M67S Manual Figure 6 - Use Of Infraducer At Distances Other Than The Factory Focused Distance Figure 7 - Removing Interference From Reflection 14
M67, M67S Manual Figure 8 - Using Sight Tubes To Eliminate Background Radiation Figure 9 - Eliminating Background Radiation Behind Semi-Transparent Target 15
M67, M67S Manual Figure 10 - Overcoming Problems Caused By Small Targets Figure 11 - Selecting Proper Spectral Response For Semi-Transparent Targets 16
M67, M67S Manual 6.5 Important information about cooling and purging your infrared thermometer Just as a thermocouple measures temperature in relation to its reference junction, an infrared thermometer measures temperature in relation to the internal temperature of the infrared thermometer (IRT) its self. An ambient temperature compensation circuit is built into the IRT to maintain calibration accuracy.
M67, M67S Manual The best cooling and purging system will only be effective if it operates all the time the process is running. It is therefore good practice to include some safeguards. The best protection for cooling and purging systems is a flow switch. This is more effective than a pressure switch and faster than a thermostat in the case of cooling protection. Additional protection can be derived from the provision of a rotameter flow meter and regulator.
M67, M67S Manual Figure 12 - Moisture Proofing Of Protective Jacket 19
M67, M67S Manual 7. Installation The following installation instructions are provided to ensure a reliable and safe operation of the INFRADUCER. Follow directions of those sections relevant to the options purchased. 7.1 Without protective jacket The INFRADUCER must be installed using the mounting bracket, Part No. 11878. This is a light duty bracket designed IRU indoor, low vibration applications. Refer to Figure 13 below for information and installation instructions.
M67, M67S Manual 7.3 Jacket with coolant circulation It is also possible to purchase a protective jacket with provisions for circulation or coolant to control the temperature around the INFRADUCER. Coolant at the prescribed inlet temperature ensures that the instrument remains at a safe, constant temperature. As noted in section 6.5, page 17, the coolant temperature must be above dew point of the air around the INFRADUCER to avoid the possibility of erroneous readings caused by moisture condensation.
M67, M67S Manual Figure 15 - Protective Jacket With Screw On End Cover 7.4 PROTECTIVE JACKET WITH OPTIONAL COOLING CAPABILITY The coolant may be connected to the INFRADUCER jacket using a 1/4" O.D. tubing. Connections are made using two 1/8" NPT x 1/4" O.D. tube fittings. See Figure 16. (If /XPD6HQVH’s type “N” Air Purge Assembly is included, see Figure 17). The coolant may be tap water or, preferably, recycled water suitably treated to prevent corrosion.
M67, M67S Manual Figure 16 - Cooling Jacket Showing Tube Fittings For Coolant Circulation 23
M67, M67S Manual Figure 17 - Suggested Piping When Using Air Purge Assembly 7.5 Air purge assembly This assembly performs three very important functions: purging, aiming and localized cooling. Air purging of the optical devices located within the INFRADUCER is extremely important if airborne contaminants are likely to deposit gradually on the lens, eventually “blinding” the instrument. A flow of 25 to 150 ft3/hr of dry, oil-free air will normally be required to ensure a clean lens.
M67, M67S Manual 7.6 Aiming flange assembly This assembly provides a firm mounting for the INFRADUCER while allowing adjustment of the optical path to a maximum of 5° in any direction perpendicular to the flange. When this has been ordered, /XPD6HQVH will assemble the spring loaded flange RQto the Air Purge Assembly. Care must be taken to avoid backing out any of the three screws beyond the thread. Figure 14 displays the flange mounting dimension.
M67, M67S Manual 8. Wiring 8.1 Wiring the M67/M67S The INFRADUCER requires a D.C. power supply that provides a minimum of 18 volts, and a maximum of 40 volts. The supply voltage is dependent on the circuit resistance. See Table 2 for required voltages. DO NOT EXCEED 40 VDC across the terminals of the INFRADUCER. shows the connections. They are plus (+), minus (-) and ground as marked on the rear panel. When the cooling jacket is used, remove the rear cap to expose the INFRADUCER.
M67, M67S Manual Figure 19 - Connection Terminals For The Infraducer. 8.2 Grounding The rear panel on the INFRADUCER also has a connection for ground. The method of grounding depends on the method used to mount the INFRADUCER. 1. If the INFRADUCER is mounted so that it is electrically insulated from the structure, connect the cable shield to the ground terminal on the INFRADUCER and connect the other end of shield to ground at the power supply at the receiver end. 2.
M67, M67S Manual Figure 20 - Loop Wiring Diagram For Grounded Infraducer Figure 21 - Loop Wiring Diagram For Ungrounded Infraducer 28
M67, M67S Manual Figure 22 - Typical wiring method for data acquisition systems 29
M67, M67S Manual 8.3 M67 PEAK/VALLEY PICKER The M67 with optional built-in peak/valley picker circuitry allows a fast response to temperature rise and adjustable slow decay of output when temperature falls. This feature is invaluable in applications where wide temperature variation are encountered. Figure 23 - M67 Peak/Valley Picker.
M67, M67S Manual 8.4 M67 LASER AIMING OPTION M67LR LASER AIMING VERSION (Laser output: 630 to 650nm at <1mW, CDRH Class II) This model incorporates the Laser Aiming option. The laser is manually activated using the push (and turn)-button on the M67 rear panel. The switch is a Push-and-Turn with a red LED indicator nearby.. The laser is on when the LED is lit. For momentary use, simply push the button in; release to turn laser off.
M67, M67S Manual 8.4.
M67, M67S Manual 9. Emissivity The emissivity of an object is the ratio of the total thermal radiant energy intensity emitted by an object corresponding to the value from a blackbody at the same temperature. The emissivity of real objects is always higher that 0 and less than 1. Typical values at room temperatures are shown below: MATERIAL TOTAL EMISSIVITY Aluminum 0.05 Carbon 0.81 Cotton Cloth 0.77 Gold 0.02 Paper 0.75 Plaster 0.92 Sand 0.76 Silver 0.02 Wood 0.
M67, M67S Manual 9.2 Emissivity compensation when using auxiliary windows Auxiliary viewing windows are required in many situations to shield the INFRADUCER from very hot or hostile environments. Such windows can be made from a variety of materials, which are consistent with spectral response codes as shown below: USEFUL WITH SPECTRAL WINDOW MATERIAL THICKNESS TRANSMITANCE RESPONSE CODE Pyrex Glass H, P, Q 1.5 mm 0.89 Quartz H, P, Q 1.5 mm 0.94 Calcium Fluoride E, P, Q 1.5 mm 0.
M67, M67S Manual 10. Operation 10.1 Startup The basic steps in the startup procedure for the INFRADUCER are as follows: Check circuit integrity. Check horizontal alignment Check vertical alignment Check for background radiation/reflection. Set emissivity. Stabilization with ambient temperature Each of these steps is explained below. 10.1.1 Checking circuit integrity When the INFRADUCER loop is powered up, at least 4mA should flow.
M67, M67S Manual 10.1.7 Stabilization If coolant is used, it should be allowed to circulate for at least one hour before readings are taken. Coolant temperature leaving the jacket should be kept below 105°F (41°C) and above the dew point at all times, and always within the normal ambient compensation range of the INFRADUCER. Also, the electrical circuits should be connected for at least half an hour to allow amplifiers to stabilize. 10.
M67, M67S Manual 10.4 Response time The response time may be changed by simply resetting a “dip” switch inside the INFRADUCER. Remove the three Phillips Head screws on the rear panel (and loosen the set-screw near the front lens on some models) and pull the electronic assembly out of the housing. Rotate the assembly so that the 4 pole “dip” switch is facing you. Remove the protective cover from the switch. Reset the switches according to the table (figure 24). Replace protective cover on switch.
M67, M67S Manual 10.5 M67 peak/valley picker 10.5.1 Description The peak picker allows the M67 to react immediately to increasing target temperature and decay in a linear form until the output equals the present target temperature. This is useful when the target is moving such as bottles on a conveyor belt. Without the peak picker, the M67 output would be a series of pulses.
1. 2. 3. 4. 5. 6. 7. 8. 9. M67, M67S Manual Mount the INFRADUCER on a tripod or bracket to ensure proper alignment. (Aiming by hand during the steps below will alter results). Allow instrument to stabilize for at least 1 hour. DO NOT HANDLE at any time during warm-up and calibration. Set emissivity to 99%. Aim the instrument at a target 2 times larger than minimum target size required and of known temperature that is near the beginning of the instrument's range. The target emissivity should be nearly 1.
M67, M67S Manual 12. Troubleshooting SYMPTOM No output, (Not even 4mA) Less than 4mA, greater than 0 mA. Low temperature readings or always reads 4 mA regardless of target. POSSIBLE CAUSES Reversed leads to Infraducer. Reversed leads to other instruments in current loop. Insufficient supply, voltage. See wiring section. Too many instruments on current loop for capacity of supply. Target size too small. COMMENTS M67S indicator light is off. Dirty window or lens. Optical path obstructed. See Section 11.
M67, M67S Manual Target moves partially out of field of view. Conveyor type applications will cause fluctuations as target passes by the field of view. Target may be changing temperature rapidly (Thermocouple does not respond as fast as the Infraducer). Loose connection in wiring. Electrical noise in lead wires caused by intense magnetic fields. Improper selection of inter-connecting cable. Cable run in same conduit as AC power lines.
M67, M67S Manual 13. Procedure for factory repair and return Do not disassemble any LumaSense instrument unless authorized by the factory. Unauthorized disassembly will void the warranty. If the instrument malfunctions, notify your local LumaSense representative (or call or fax the LumaSense Service Department at the number below). If necessary, they will authorize the return of your instrument. Pack the instrument in its original packing, or a carton with sufficient padding to prevent further damage.
M67, M67S Manual 14. Appendix 14.1 Accessories (electrical) 14.1.1 FM approved model The model M67 “Infraducer” has been approved by Factory Mutual (FM) for usage in hazardous environments. When used in conjunction with the optional barriers, the entire system will be rated intrinsically safe. Approvals are for Class I. II or III, Division 1, Group A, B, C, D, E, F and G. At the time of order please specify that the FM approved version is required. See Figure 26 for wiring. Figure 26 - M67FM Wiring.
M67, M67S Manual 44
M67, M67S Manual 14.1.2 M67EM electronic module The M67EM is a basic electronic module designed to support the M67 “Infraducer” on those installations where a remote peak/valley picker is the dominant electronic requirement. The M67EM operates from 115 VAC current (220 VAC Optional) and provides a 24 VDC voltage for a loop current. See Figure 28 for wiring. Figure 27 - M67EM Electronic Module.
M67, M67S Manual Figure 28 - M67EM Processor Wiring. 14.1.3 M67EM specifications Input Signal Requirements: Response Time Adjust: Peak/Valley Picker Decay Rate: Peak Picker Controls: Standard Outputs (linear): Output Supply Voltage: Ambient Temperature range: Size: Panel Cutout 4-20 mA linear from M67 output 10mS to 10 sec. Field adjustable (Valley Picker optional) Continuously adjustable between 0.01 and 10% of full scale/sound (Valley Picker optional) On, Cancel and Reset from front panel.
M67, M67S Manual 14.1.4 Precision digital process meter (MIKRON M60TS) The M60TS is a 1/8 DIN digital process meter with front panel keyboard programmability. The M60TS is available in both 3 1/2 digit (for temperature below 2000 deg) and 4 digit (for temperatures above 2000 deg) versions. It provides monitoring and display of the minimum and maximum process value input with keypad reset as a standard feature. The M60TS contains a builtin 20 VDC power supply which simplifies connection to the “Infraducer”.
M67, M67S Manual 14.1.6 POWER SUPPLIES These power supplies provide either a 24 or 40 V current to power the sensor head. The low profile, sealed and rugged package is designed for chassis mounting. The front mounted terminal barrier strip is perfect for isolation between input and output voltages. A current limiting feature protects the power supply when short circuit occurs. Four taped holes are provided for mounting. Available in both 115 and 230 VAC version. See Figure 30 for mounting dimensions.
M67, M67S Manual 14.2 M67/67S "Infraducer" specifications General Specifications Accuracy:** ±0.50% of full scale or 1.0°C (1.8°F) whichever is greater. Resolution: ±0.1% of full scale span (FSS) Repeatability: ±0.2% of full scale span (FSS) Emissivity: Digital setting 0.10 to 0.99 with 0.01 step Optical System: M67S: Non-parralex refractive optics focusable from rear panel. Field of View: M67S: Visual sighting 4°. Infrared measurement definition MTS see FOV diagram for M67 and optical resolution for M67S.
M67, M67S Manual 14.3 Temperature errors caused by a 1% emissivity error LUMASENSE’S V H Q M D L E F B SPECTRAL CODE EFFECTIVE 0.65 m 0.9 m 1.3 m 3.43 m 3.86 m 4.5 m 5.0 m 7.9 m 10.6 m WAVELENGTH TARGET TEMPERATURE ERRORS (C) (C) -50.0 1.8 1.3 -40.0 1.3 1.0 -30.0 1.0 0.8 -20.0 0.7 0.6 -10.0 0.5 0.4 0.0 0.3 0.3 10.0 0.2 0.2 20.0 0.0 0.0 30.0 0.0 0.0 0.0 0.0 0.0 0.0 40.0 0.1 0.1 0.1 0.1 0.1 0.1 50.0 0.2 0.2 0.2 0.2 0.2 0.2 60.0 0.2 0.2 0.2 0.2 0.3 0.3 70.0 0.2 0.3 0.3 0.3 0.4 0.4 80.0 0.3 0.3 0.
M67, M67S Manual 1000.0 0.7 1.1 1.5 3.7 4.1 4.6 5.0 6.7 7.4 1100.0 0.9 1.3 1.8 4.3 4.7 5.3 5.7 7.5 8.2 1200.0 1.0 1.4 2.0 4.9 5.4 6.0 6.4 8.4 9.1 1300.0 1.1 1.6 2.3 5.5 6.0 6.7 7.2 9.2 10.0 1400.0 1.3 1.8 2.6 6.2 6.7 7.4 7.9 10.1 10.9 1500.0 1.4 2.0 2.8 6.8 7.4 8.1 8.7 11.0 11.9 1600.0 1.6 2.3 3.1 7.5 8.1 8.9 9.5 11.9 12.7 1700.0 1.8 2.5 3.5 8.2 8.9 9.7 10.3 12.8 13.7 1800.0 1.9 2.8 3.8 8.9 9.6 10.5 11.1 13.7 14.6 1900.0 2.1 3.0 4.2 9.6 10.4 11.3 12.0 14.6 15.5 2000.0 2.3 3.3 4.5 10.4 11.2 12.1 12.8 15.
