OMEGA OS643W Infrared Thermometer
omega.com TM OMEGAnetSM On-Line Service http://www.omega.com Servicing North America: USA: ISO 9001 Certified Canada: One Omega Drive, Box 4047 976 Bergar Stamford, CT 06907-0047 Laval (Quebec) H7L5A1 Tel: (203) 359-1660 Tel: (514) 856-6928 FAX: (203)359-7700 FAX: (514) 856-6886 e-mail: info@omega.com e-mail: info@omega.com Internet e-mail info@omega.
INTRODUCTION This instrument is a portable easy use 3½ digit, compact-sized digital thermometer designed to use infrared or K-type thermocouple as input. Meter with Backlit LCD, Auto-hold function and auto power off (15 seconds approx.) feature after releasing MEAS button to extend battery life and with analog signal output function. Temperature indication follows Reference Temperature/Voltage Tables N.I.S.T. Monograph 175 Revised to ITS-90 for K-type thermocouple.
WARNING To avoid damage or burns, do not make temperature measurement in microwave ovens. The symbol on the instrument indicates that the operator must refer to an explanation in this manual.
CAUTION • Do not use the unit near any device which generates strong electromagnetic radiation or near a static electrical charge, as these may cause errors. • Do not point the lens at the sun or at any other source of strong light. If you do, the sensor may be damaged. • Do not contact the lens against the object whose temperature is to be measured, or get it dirty, allow it to be scratched, or allow any foreign material to adhere to it. Doing so may cause errors. • Do not touch or hold by the front cone.
SPECIFICATIONS GENERAL Display: 3½ digit liquid crystal display (LCD) with maximum reading of 1999. Overrange: (OL) or (-OL) is displayed. Low battery indication: the " " is displayed when the battery voltage drops below the operating level. Measurement rate: 2.5 times per second, nominal. Operating Environment: 32°F to 122°F (0°C to 50°C) at < 70% relative humidity. Storage Temperature: 40°F to 140°F (-20°C to 60°C), 0 to 80% R.H. with battery removed from meter. Auto power off: 15 seconds approx.
Infrared Radiation ELECTRICAL Temperature Range: 0°F to 500°F, -20°C to 260°C. Display Resolution: 1°F / 1°C. Accuracy: ±3% of reading or ±6°F/3°C, whichever is greater @ 64.4 to 82.4°F (@ 18 to 28°C) ambient operating temperature. Temperature Coefficient: ±0.2% of reading or ±0.36°F/0.2°C, whichever is greater, change in accuracy per °F/°C change in ambient operating temperature above 82.4°F/28°C or below 64.4°F/18°C. Response Time: 1 second. Spectral Response: 6 to 14µm nominal. Emissivity: Pre-set 0.95.
Spot size increases with distance from the probe tip as shown 6
K-type thermocouple ELECTRICAL Temperature Range: -58°F to 1999°F, -50°C to 1300°C. Display Resolution: 1°F / 1°C. Accuracy: Accuracy is specified for operating temperatures over the range of 64°F to 83°F (18°C to 28°C), for 1 year, not including thermocouple error. ±(0.3% rdg + 2°F) -58°F to 1999°F ±(0.3% rdg + 1°C) -50°C to 1000°C ±(0.5% rdg + 1°C) 1000°C to 1300°C Temperature Coefficient: 0.
OPERATING INSTRUCTIONS MEAS (MEASURE) Button Depress MEAS button to turn on the meter for measuring temperature. Releasing MEAS button to stop measuring temperature and automatically hold the display reading, the meter turns off automatically after 15 seconds.
OPERATION Infrared Radiation Measurements 1. 2. 3. 4. 5. 6. When the power is off, pressing the MEAS button turns on the power. Use "IR / K" switch to select IR Temperature function. Use " " switch to turn on or turn off the display Back-Light. Use "°F/°C" switch to select °F or °C the Temperature Range. Point the lens at the object whose temperature is to be measured. Press the MEAS button. Measurement is performed as long as the MEAS button is kept pressed. 7. Referring to the spot size figure.
K-type thermocouple Measurements 1. When the power is off, pressing the MEAS button turns on the power. 2. Use "IR / K" switch to select K Temperature function. 3. Use " " switch to turn on or turn off the display Back-Light. 4. Use "°F/°C" switch to select °F or °C the Temperature Range. 5. Connect a type K thermocouple to the jack on the instrument. Place the probe or thermocouple tip on or in the material to be measured. 6. Press the MEAS button.
MEASUREMENT CONSIDERATIONS 1. Theory of Measurement Every object emits infrared energy in accordance with its temperature. By measuring the amount of this radiant energy, it is possible to determine the temperature of the emitting object. 2. About Infrared Infrared radiation is a form of energy (electromagnetic radiation), and has the property that it passes easily through air while it is easily absorbed by solid matter.
4. Emissivity All objects emit invisible infrared energy. The amount of energy emitted is proportional to the object's temperature and its ability to emit IR energy. This ability, called emissivity, is based upon the material that the object is made of and its surface finish. Emissivity values range from 0.10 for a very reflective object to 1.00 for a black body. Factory set emissivity value of 0.95, which cover 90% of typical applications. 5.
MAINTENANCE Battery Replacement Power is supplied by four 1.5V (AAA size) batteries. The " " appears on the LCD display when replacement is needed. To replace the batteries, remove the screw from the back of the meter and lift off the battery cover case. Remove the batteries from battery contacts. Cleaning Periodically wipe the case with a damp cloth and detergent, do not use abrasives or solvents.
Substance Asphalt Concrete Cement Sand Earth Water Ice Snow Glass Ceramic Marble Plaster Mortar Brick (red) Thermal emissivity 0.90 to 0.98 0.94 0.96 0.90 0.92 to 0.96 0.92 to 0.96 0.96 to 0.98 0.83 0.90 to 0.95 0.90 to 0.94 0.94 0.80 to 0.90 0.89 to 0.91 0.93 to 0.96 Substance Thermal emissivity Cloth (black) 0.98 Human skin 0.98 Lather 0.75 to 0.80 Charcoal (powder) 0.96 Lacquer 0.80 to 0.95 Lacquer (matt) 0.97 Rubber (black) 0.94 Plastic 0.85 to 0.95 Timber 0.90 Paper 0.70 to 0.94 chromium oxides 0.
WARRANTY OMEGA warrants this unit to be free of defects in materials and workmanship and to give satisfactory service for a period of 13 months from date of purchase. OMEGA Warranty adds an additional one (1) month grace period to the normal one (1) year product warranty to cover handling and shipping time. This ensures that OMEGA's customers receive maximum coverage on each product. If the unit should malfunction, it must be returned to the factory for evaluation.
It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that apply. OMEGA is constantly pursuing certification of its products to the European New Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification. The information contained in this document is believed to be correct but OMEGA Engineering, Inc. accepts no liability for any errors it contains, and reserves the right to alter specifications without notice.
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