MARATHON FA/FR Series 1-Color Fiber Optic Thermometer 2-Color Fiber Optic Thermometer Operating Instructions Rev.
Contacts Worldwide Headquarters Santa Cruz, CA USA Tel: +1 800 227 – 8074 (USA and Canada only) +1 831 458 – 3900 Fax: +1 831 458 – 1239 solutions@raytek.com European Headquarters Berlin, Germany Tel: +49 30 4 78 00 80 France info@raytek.fr United Kingdom Tel: +44 1908 630 800 ukinfo@raytek.com raytek@raytek.de Fluke Service Center Beijing, China Tel: +86 10 6438 691 Tel: +86 10 4008103435 (Service) info@raytek.com.cn Internet: http://www.raytek.com/ Thank you for purchasing this Raytek product.
WARRANTY The manufacturer warrants this instrument to be free from defects in material and workmanship under normal use and service for the period of two years from date of purchase. This warranty extends only to the original purchaser. This warranty shall not apply to fuses, batteries, or any product that has been subject to misuse, neglect, accident, or abnormal conditions of operation.
T ABLE OF C ONTENTS 1 SAFETY INSTRUCTIONS..............................................................................................................................1 2 PRODUCT DESCRIPTION ............................................................................................................................2 2.1 THEORY OF OPERATION FOR 2‐COLOR SENSORS.........................................................................................2 2.1.1 Partially Obscured Targets ............................
OPERATION................................................................................................................................................... 25 6.1 CONTROL PANEL ....................................................................................................................................... 25 6.2 OPERATION MODES ................................................................................................................................... 26 6.2.1 Temperature Display ............
10.4.2.1 Attaching the Fiber Optic Cable to the Optical Head ..........................................................51 10.4.2.2 Attaching the Fiber Optic Cable to the Electronics Housing ..............................................51 10.4.3 Fiber Calibration ...............................................................................................................................52 11 APPENDIX ..........................................................................................................
Safety Instructions 1 Safety Instructions This document contains important information, which should be kept at all times with the instrument during its operational life. Other users of this instrument should be given these instructions with the instrument. Eventual updates to this information must be added to the original document. The instrument can only be operated by trained personnel in accordance with these instructions and local safety regulations.
Product Description 2 Product Description The Marathon FA/FR fiber optic series of instruments are high‐performance infrared thermometers. Each has a front end consisting of a small, fixed focus optical head coupled to a rugged fiber optic cable wrapped with a flexible stainless steel sheath. The fiber optic cable attaches to an electronics enclosure, which can be mounted away from the hot, hostile environment. The electronics enclosure can be connected to a computer with its two‐way RS485 interface.
Product Description Another benefit is that 2‐color sensors measure closer to the highest temperature within the measured spot (spatial peak picking) instead of an average temperature. A 2‐color sensor can be mounted farther away, even if the target does not fill the resulting spot size. The convenience is that you are not forced to install the sensor at some specific distance based upon target size and the sensor’s optical resolution. 2.1.
Technical Data 3 Technical Data 3.1 Measurement Specifications 3.1.1 FA Models Temperature Range FA1A FA1B FA1C 475 to 900°C (887°F to 1652°F) 800 to 1900°C (1472°F to 3452°F) 1200 to 3000°C (2192°F to 5432°F) FA1G FA2A FA2B 750 to 1675°C (1382°F to 3047°F) 250 to 800°C (482°F to 1472°F) 400 to 1700°C (752°F to 3092°F) Spectral Response FA1 FA2 1.0 μm (Si detector) 1.6 μm (InGaAs detector) System Accuracy 1 FA1/FA2 ±(0.
Technical Data System Accuracy 1 no signal attenuation up to 95% signal attenuation up to 95% signal attenuation ±(0.3% Tmeas* + 2°C) ±(1% Tmeas* + 2°C) for FR1A/FR1B ±(1.3% Tmeas* + 2°C) for FR1C * Tmeas in °C see also appendix 11.4 and 11.5, pages 57 ff. Repeatability ±1°C (±2°F) Temperature Resolution ±1°C (±2°F) Response Time 10 msec (95%), selectable to 10 sec Temperature Coefficient ±0.1% of reading at ambient temperature from 0 to 60°C Emissivity (1‐color) 0.10 to 1.00, in 0.
Technical Data Warm up Period 15 minutes Weight Optical Head Electronics Housing 100 g (3.5 oz) 710 g (9 oz) 3.3 Electrical Specifications Power Supply 24 VDC ±20%, 500 mA (max 100 mV peak to peak of ripple) Power Consumption max.
Technical Data 3.4 Dimensions Fiber Optic Cable min. bend radius Figure 2: Dimensions of Optical Head(FA Models) Fiber Optic Cable min. bend radius Figure 3: Dimensions of Optical Head (FR Models) Mounting hole ∅ 5 mm (0.188) Max. fastener head 8 mm (0.31) Hole diameter: 21 mm (0.
Technical Data Figure 5: Adjustable Mounting Bracket for Optical Head 8 Marathon Series FA/FR
Technical Data 3.5 Optical Specifications The sensor comes as a standard focus model or one of two close focus models, see following overview for available options. For one‐color temperature measurements make sure the target completely fills the measurement spot. 3.5.1 FA Models 3.5.1.
Technical Data 3.5.1.
Technical Data 3.5.2 FR Models 3.5.2.
Technical Data 3.5.2.
Sensor Location 4 Sensor Location Sensor location and configuration depends on the application. Before deciding on a location, you need to be aware of the ambient temperature of the location, the atmospheric quality of the location (especially for 1‐color temperature measurements), and the possible electromagnetic interference in that location (a consideration only for the electronics enclosure). If you plan to use air purging, you need to have an air connection available.
Sensor Location 4.5 Sensor Placement (1‐Color Mode) Optical head placement for one‐color temperature measurements is more critical than two‐color measurements. The sensor must have a clear view of the target. There can be no obstructions on the lens, window, or in the atmosphere. The distance from the target can be anywhere beyond the minimum requirements, as long as the target completely fills the field of view. The following figure illustrates proper placement when using the one‐color mode.
Sensor Location Sighting hole smaller than the sensor’s field of view Emitted energy Dirty lens or dirty sighting window Emitted energy Smoke, steam, dust, gas in atmosphere Emitted energy Emitted energy Target smaller than field of view and/or moves or vibrates in and out of field of view (e.g. wire) Figure 11: Sensor Placement in 2‐Color Mode 4.7 Viewing Angles The optical head can be placed at any angle from the target up to 30° for one‐color mode, or 45° for two‐color mode.
Sensor Location Best Acceptable Angles 90° to target Good 1-Color Mode: 30° to 90° to target 2-Color Mode: 45° to 90° to target Bad 1-Color Mode: 0° to 30° to target 2-Color Mode: 0° to 45° to target Figure 12: Acceptable Sensor Viewing Angles 16 Marathon Series FA/FR
Installation 5 Installation 5.1 Mounting the Sensor After all preparations are complete according to section 4 Sensor Location, page 13 ff., you can install the sensor. How and where you anchor the optical head and electronics enclosure depends on the type of surface and the type of bracket you are using. You can mount the optical head through a hole, on a bracket of your own design, or on the available bracket accessory.
Installation 5.2 Aiming An effective aiming technique is to adjust the head until the highest reading is observed on the internal display. When the highest reading is reached, hold the unit in place and secure the mounting base. Make sure that the sensor is in 1‐color mode when using this aiming technique! Another aiming can be done by means of a battery powered aiming light.
Installation 5.4 Installing the Electronics Housing The distance between the electronics housing and a computer (via RS485 cable) can be up to 1200 m (4000 feet). This allows ample distance from the harsh environment where the sensing head is mounted to a control room or pulpit where the computer is located. For reliable performance it is recommended that the power supply be no more than 60 m (200 feet) away! Following you can see installation examples shown with two representative cable types.
Installation 12-wire cable +24V (red) GND (black) TxA (purple) TxB (grey) RxA (black) RxB (white) Attention: Do not confuse twisted pair black wire with single black power wire 4- wire cable +mA (green) -mA (brown) NO/NC (blue) COM (orange) TRIG (yellow) SHIELD (bare) +24V (red) GND (black) Cable compression fitting or conduit adapter +mA (green) -mA (white) Cable compression fitting or conduit adapter twisted cable pairs Figure 15: Electronics Housing Wiring Incorrect wiring can damage the senso
Installation 5.5 Power Supply Connections from a 24 VDC (500 mA or higher) power supply attach to the appropriate terminals on the electronic enclosure’s terminal strip. Isolated power is required, and this is provided by the appropriate manufacturer supplied power supply accessory. Beware of use of other power supplies which may not provide the necessary isolation and could cause instrument malfunction or damage! 5.
Installation 2. 3. 4. 5. 6. Install all electronics wiring according to the applicable sections 5.4, 5.7.x, and 5.8! Plug the RS485/RS232 interface converter into your computer’s serial port, or attach it to a serial cable connected to the computer! Use 9 pin to 25 pin converter if necessary! If the 9 VDC power supply is used, apply power to the RS485/RS232 converter! Apply power to the FA/FR sensor! Turn on your computer! You need to make sure another serial device (e.g.
Installation RS232/485 Interface Converter To Computer RS232 serial port XXX485CVT… from TxB from TxA Ground +24 VDC (optional) 9 VDC power supply or ... Electronics Housing 24 VDC power supply Figure 19: Wiring for 2‐Wire Sensor Setup 5.7.3 Connecting to Terminal Block If you need to extend the wiring or to have a complete wiring of all inputs/outputs, use the Terminal Block accessory. Make sure you connect the color‐coded wires correctly.
Installation 5.8 Installing of Multiple Sensors in a Network 5.8.1 Wiring For an installation of two or more sensors in a network, each sensor cable is wired to its own terminal block. The RS485 terminals on each terminal block are wired in parallel. The following figure illustrates the wiring of sensors in a 4‐wire multidrop installation. A network as a 2‐wire multidrop installation is to realize according to Figure 19, p. 23.
Operation 6 Operation Once you have the optical head and electronics housing positioned and connected properly, the system is ready for continuous operation. The operation of the sensor can be done by means of the control panel in the electronics housing or by means of the software that came with your sensor. 6.1 Control Panel The sensor is equipped with a control panel, which has setting/controlling buttons and an LED display. You can configure sensor settings with the control panel or with a computer.
Operation The sensor has a remote locking feature that keeps the unit from being accidentally changed from the control panel (locked by default in multidrop mode). This lockout mode denies access to all the switches on the control panel. It is available through the RS485 connection and can be unlocked only by a command from the remote computer. 6.2 Operation Modes When you first turn the unit on, the display shows the current temperature.
Operation Display current temperature Switches between °C and °F Display/Change emissivity (1-color mode) default: 1.00 Display/Change slope (2-color mode) default: 1.000 Raises and lowers emissivity or slope Display/Change peak hold setting default = 0 sec / off Raises and lowers peak hold timing Display/Change averaging setting default = 0 sec / off Raises and lowers averaging time Figure 25: Mode Selector Button Sequence (FR Models) 6.2.
Operation The slope is the deciding parameter for measurements in 2‐color mode! The emissivity affects only measurements in 1‐color mode. For information on determining an unknown slope, and for sample slopes, refer to section 11.3 Typical Slopes, p. 56. To change the unit’s slope setting, complete the following: 1. 2. 3. 4. Make sure the 2C LED is lit. Press the Mode button until the Є LED is lit. The current slope value shows on the display. Press the c or d button to change the value.
Operation Hot objects moving on a production line Standard output signal Average output signal Figure 26: Averaging Example To set and activate Averaging, do the following: 1. 2. 3. Press the Mode button until the AVG LED is lit. Press thec button to both set and activate. The display reads in 0.1 seconds. Set Average anywhere from 0.1 to 300.0 seconds. If Average is set to 0.0 seconds, the function is deactivated. Press the Mode button until the C or F LED is lit.
Operation Peak Hold with decay Advanced Peak Hold timer trigger or threshold Advanced Peak Hold timer or threshold Advanced Peak Hold with timer or decay threshold Valley Hold*** timer Valley Hold*** trigger Valley Hold with decay*** timer Advanced Valley Hold*** trigger or threshold Advanced Valley Hold*** timer or threshold Advanced Valley Hold timer or with decay*** threshold 000.1-299.9 300.0 000.0 000.0 000.0 0250-3000 -* -* 0001-9999 0000 000.1-299.9 000.0 0250-3000 -* 0000 000.1-299.
Operation 962°C Deadband Object Temperature Relay Changes State Setpoint: 960°C 958°C Time Normal State Alarm Normal State Alarm Figure 27: Deadband Example 6.2.11 Ambient Background Temperature Compensation (FA Models) The FA model is capable of improving the accuracy of target temperature measurements by taking into account the ambient, or background, temperature. This feature is useful when the target emissivity is below 1.
Operation 6.4 Factory Defaults To globally reset the unit to its factory default settings, press the c and d buttons at the same time for approximately 2 seconds. The baud rate will not change from the last value when this is done. Parameter Display mode Emissivity FA (1-color unit) °C, TEMP- Display 1.00 FR (2-color unit) 2C, °C, TEMP- Display 1.00 Slope PKH 0.0 s 1.000 0.0 s AVG VAL 0.0 s 0.0 s 0.
Options 7 Options Options are items that are factory installed and must be specified at time of order. The following are available: • Fiber optic cable lengths: 1, 3, 6, 10 m (3, 10, 20, 33 ft), 22 m (72 ft) for selected models • ISO Calibration Certificate, based on NIST/DKD certified probes (XXXFR1CERT) • High Temperature Fiber Cable (…H), rated to 315°C (600°F), not available on FA2 models • Laser Sighting (…L) only on FA1A/FA2A and FR1A/FR1B models • Cooling Platform for Electronics Housing (...
Accessories 8 Accessories 8.1 Overview A full range of accessories for various applications and industrial environments are available. Accessories include items that may be ordered at any time and added on‐site.
Accessories 8.2 Air Purge Collar The Air Purge Collar accessory is used to keep dust, moisture, airborne particles, and vapors away from the optical headʹs lens. It can be installed before or after the bracket. It must be screwed in fully. Air flows into the 1/8” NPT fitting and out the front aperture. Air flow should be a maximum of 0.5 ‐ 1.5 liters/sec (1 ‐ 3 cfm). Clean (filtered) or “instrument” air is recommended to avoid contaminants from settling on the lens. Do not use chilled air below 10°C (50°F).
Accessories 8.4 Fitting System Flexible accessory selections allow you to pick and choose the accessories you need.
Accessories 8.5 RS232/485 Interface Converter The RS232/485 interface converters have built‐in smart switching and have been designed to be fast, allowing for use in either 2‐wire or 4‐wire mode, in either multi‐drop or stand‐alone mode. The RS232/485 interface converter is required for multi‐drop communications.
Accessories 8.6 Industrial Power Supply The DIN‐rail mount industrial power supply transforms an input voltage of 85 – 264 VAC into an output voltage of 24 VDC / 1.25 A. The power supply provides short circuit and overload protection.
Programming Guide 9 Programming Guide This section explains the sensor’s communication protocol. Use them when writing custom programs for your applications or when communicating with your sensor with a terminal program. 9.1 Remote versus Manual Considerations Since the sensor includes a local user interface, the possibility exists for a person to make manual changes to parameter settings.
Programming Guide Example: Send E=0.90 instead of E=0.9; send P=001.2 instead of P=1.2 After transmitting one command, the host has to wait for the response from the unit before sending another. A response from the sensor is guaranteed within 4 seconds in Poll mode and 8 seconds in Burst mode at 300 baud. The response is faster at higher baud rates. An asterisk * will be transmitted back to the host in the event of an “illegal” instruction.
Programming Guide • • • • • • • Sensor Model Type Sensor Serial Number Relay Control Laser status Setpoints Deadband Current Output Mode (0 ‐ 20 mA or 4 ‐ 20 mA) The following items cannot be polled: • • • • Poll/Burst Mode Baud rate Relay control Set current output An example string for command $=UTQEGH The default string is as follows: C T1250 Q0400.023 E1.00 G005.5 H1400 9.
Programming Guide 9.5 Command List In depending from the specific commands, the following characters are used: ? ... host (e.g. PC) requests for a parameter value of the unit ! ... unit acknowledges a valid parameter request and responses with the parameter value = ... host forces the unit to set a certain parameter # ... unit informs the host, a parameter was set on the control panel manually * ...
Programming Guide Description Char Format (2) P (1) B (1) Wide Power Q nnnn.nnn √ √ 0000.000-9999.999 Narrow Power (FR only) R nnnn.nnn √ √ 0000.000-9999.999 Slope (FR only) S n.nnn √ √ Target temperature FR series: 2-color T nnnn √ √ √ √ Temperature unit U X Poll/Burst mode V X Target temperature FR series: 2-color wide W nnnn Burst string contents (5) X$ Multidrop address XA nnn √ Low temperature limit XB nnnn √ S (1) √ N (1) √ 0.850-1.
Programming Guide 9.6 Command Examples HOST SENSOR HOST SENSOR Description Query Answer Set Notification Burst string format 001?$ 001!$UTSI 001$=UTSI Show list of commands 001? Measured attenuation 001?B Baud rate WHERE USED (1) P B √ S N √ √ 001!B12 001!D384 001D=384 √ √ √ Emissivity 001?E 001!E0.95 001E=0.95 001#E0.95 √ √ √ √ Average time 001?G 001!G001.2 001G=001.2 001#G001.
Maintenance 10 Maintenance Our sales representatives and customer service are always at your disposal for questions regarding application assistance, calibration, repair, and solutions to specific problems. Please contact your local sales representative if you need assistance. In many cases, problems can be solved over the telephone. If you need to return equipment for servicing, calibration, or repair, please contact our Service Department before shipping.
Maintenance 10.2 Fail‐Safe Operation The Fail‐Safe system is designed to alert the operator and provide a safe output in case of any system failure. Basically, it is designed to shutdown the process in the event of a set‐up error, system error, or a failure in the sensor electronics. The Fail‐Safe circuit should never be relied on exclusively to protect critical heating processes.
Maintenance The relay is controlled by the temperature selected on the display. If any failsafe code appears on the display, the relay changes to the “abnormal” state. The exception is the “dirty window” condition. This causes the relay to change state, leaving a normal numerical temperature output. The dirty window is detected in either 1‐color or 2‐color mode.
Maintenance 10.3 Cleaning the Lens Keep the lens clean at all times. Any foreign matter on the window will affect 1‐color measurement accuracy and may affect two‐color accuracy. However, care should be taken when cleaning the lens. To clean the window, do the following: 1. 2. 3. Lightly blow off loose particles with “canned” air (used for cleaning computer equipment) or a small squeeze bellows (used for cleaning camera lenses).
Maintenance 10.4 Replacing the Fiber Optic Cable FA fiber cable assemblies are not field ʺreplaceableʺ without blackbody recalibration! As such, spare FA fiber cable assemblies are not available! If the fiber optic cable ever needs to be removed or replaced, it can be removed from both the optical head and electronics enclosure without demounting them from their brackets.
Maintenance Turn 1.3 mm (0.050“) hex wrench counter clockwise until cable is loose Put cable out Figure 36: Removing the Fiber optic Cable from the Optical Head 10.4.1.2 Removing the Fiber Optic Cable from the Electronics Housing Complete the following steps to disconnect the fiber optic cable from the electronics housing: 1. 2. 3. First loosen the cable connecting sleeve. Loosen the cable receptacle screw to release the cable.
Maintenance 10.4.2 Mounting the Fiber Optic Cable 10.4.2.1 Attaching the Fiber Optic Cable to the Optical Head Complete the following steps to attach the fiber optic cable to the optical head: 1. 2. The fiber optic cable ferrule has a key slot on its surface. Insert the ferrule into the rear of the optical head. Turn the head until the key on the ferrule’s key slot engages the key pin inside the head. Make sure cable is pushed in all the way before tightening hex screw! Tighten the hex screw with the 1.
Maintenance Tighten only after securing connecting sleeve Note keyed connecting sleeve (can be inserted only one way - slot must face mode switches) Push connecting sleeve in until it stops, approx. 15 mm (0.6 in) Tighten screw (finger tighten only) Figure 39: Attaching the Fiber Optic Cable to the Electronics Housing 10.4.3 Fiber Calibration Each replacement fiber optic cable is calibrated at the factory before shipping. The calibration constants are sent along with a label mounted on the cable.
Maintenance Figure 40: Dialog for the Calibration of the Fiber Cable Marathon Series FA/FR 53
Appendix 11 Appendix 11.1 Determination of Emissivity Emissivity is a measure of an object’s ability to absorb and emit infrared energy. It can have a value between 0 and 1.0. For example a mirror has an emissivity of 0.1, while the so‐called “Blackbody“ reaches an emissivity value of 1.0. If a higher than actual emissivity value is set, the output will read low, provided the target temperature is above its ambient temperature. For example, if you have set 0.95 and the actual emissivity is 0.
Appendix EMISSIVITY AT 1 µM FOR METALS Aluminum unoxidized oxidized roughened polished Brass polished Burnished Chromium Copper 0.1-0.2 0.4 Iron, cast oxidized unoxidized 0.9 0.35 0.2-0.8 0.1-0.2 molten Magnesium 0.35 0.3-0.8 0.35 0.65 Molybdenum oxidized unoxidized 0.5-0.9 0.25-0.35 0.4 Monel (Ni-Cu) Nickel 0.3 0.05 0.05-0.2 0.2-0.8 oxidized electrolytic Silver 0.8-0.9 0.2-0.4 0.04 Gold Haynes 0.3 Steel cold rolled Alloy Inconel oxidized 0.5-0.
Appendix 11.3 Typical Slopes The following slope settings are approximate and will vary depending on the metal alloy and surface finish, as well as the application. These are supplied here as examples. Set the slope to approximately 1.000 for measuring the following metals with oxidized surfaces: • Stainless Steel • Iron • Cobalt • Nickel • Steel Set the slope to approximately 1.
Appendix 11.4 Signal Reduction (FR Models) Maximum Allowed Signal Reduction [%] The following figures show each sensor model’s typical percentage of allowed signal reduction at all temperatures. Refer to these graphs to estimate what percentage of target area must be visible to the sensor at temperatures below the minimum temperature (95% attenuation).
Appendix 11.5 Attenuation Influence on Accuracy The ability of the FR ratio instruments to accurately measure the temperature of targets smaller than the field‐of‐view (FOV) is a key feature. As the target size becomes smaller than the FOV (thus attenuating the signal) this may cause a slight inaccuracy in the reading.
Marathon Series FA/FR Daily check at 1000, 1700, and 2500°C 760 to 2700°C High Temp Secondary (Working) Standard 760 to 2700°C High Temp Primary Standard Annual NIST Calibration and historical data results review Fluke reserves the right to make changes to this traceability and methodes without notice.
