Related Manuals for Ametek LAND RT8A
Summary of Contents for Ametek LAND RT8A
- Page 1 RT8A Thermometer User Guide Issue 3: January 2012 Part Nº is 801450 Publication Nº PP309 Language: English Copyright © 2005 - 2012 Land Instruments International...
- Page 2 IMPORTANT INFORMATION - PLEASE READ Health and Safety Information Read all of the instructions in this booklet - including all the WARNINGS and CAUTIONS - before using this product. If there is any instruction which you do not understand. DO NOT USE THE PRODUCT. Safety Signs WARNING Indicates a potentially hazardous situation which, if not avoided, could result in death or...
- Page 3 E-Mail: irsales@ametek.com Web: www.landinst.com Web: www.ametek-land.com For further details on all LAND/Ametek offices, distributors and representatives, please visit our websites. Return of Damaged Goods IMPORTANT If any item has been damaged in transit, this should be reported to the carrier and to the supplier immediately.
- Page 4 Thermometer User Guide Technical support Technical support for the LAND RT8A Thermometer can be obtained by either contacting the address/telephone number on the cover of this User Guide or by e-mail at the following address: landsupport@ametek.co.uk RT8A...
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Page 5: Table Of Contents
User Guide Thermometer Contents Introduction General Introduction About the RT8A thermometer Instrument Specifications Specification Table Thermometer Dimensions Target Spot Size Thermometer Installation Electrical Connections General Connections Loop Resistance Thermometer Operation General Location of Controls Adjusting the ‘Emissivity’ Setting Adjusting the Averager ‘Response Speed’ Setting Settings Archive Mountings and Accessories General... - Page 6 Thermometer User Guide RT8A...
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Page 7: Introduction
1.2 About the RT8A thermometer The Land RT8A Thermometer is a highly accurate, non-contact infrared thermometer, designed for independent or ‘stand alone’ applications. The thermometer features include: •... -
Page 8: Instrument Specifications
Thermometer User Guide Instrument Specifications 2.1 Specification Table Operating Temperature Range: RT80A 0 to 250°C (focused at infinity) RT81A 0 to 500°F RT82A 0 to 500°C RT83A 0 to 1000°F Specified Temperature Range: RT80A 0 to 250°C RT81A 30 to 500°F RT82A 0 to 500°C RT83A... -
Page 9: Thermometer Dimensions
2500 Distance to Target (mm) Minimum Target Size (in) 0.83 1.02 1.34 2.13 3.39 4.80 6.14 11.8 19.7 39.4 59.1 78.7 98.4 Distance to Target (in) Fig. 3 - Land RT8A thermometer target spot size table 309003 RT8A Page 3... -
Page 10: Thermometer Installation
Thermometer User Guide The Land RT8A thermometer operates by sensing radiation from within a well defined ‘field of view’. The intersection of this field of view with the intended target, determines the ‘target spot’, the area where the temperature is measured. -
Page 11: Electrical Connections
User Guide Thermometer Electrical Connections 3.1 General Connections The electrical connections for the RT8A thermometer power supply and temperature output are made via the 6-way socket on the rear of the thermometer (see Fig. 6). The connection to the thermometer can be made via any of the following: •... -
Page 12: Loop Resistance
Thermometer User Guide Lugs Keyway Locking Sleeve Red Markers Fig. 4 - Connecting the 6-way plug to the RT8A Thermometer 309004 3.2 Loop Resistance The maximum allowable loop resistance in the RT8A thermometer current loop, for a given power supply voltage, is illustrated in Fig. 5. NOTE The system load resistance includes the cable resistance and the indicator resistance. -
Page 13: Thermometer Operation
User Guide Thermometer Thermometer Operation 4.1 General It is recommended that the ‘Emissivity’ and ‘Response Speed’ controls are set to match the requirements of the specific application and measurement location, before installation. This is particularly relevant if the thermometer is to be used in a location which is difficult to access and/or is used in conjunction with a protective jacket and back cap. -
Page 14: Adjusting The 'Emissivity' Setting
Thermometer User Guide 4.3 Adjusting the ‘Emissivity’ Setting To ensure that the Land RT8A thermometer makes consistent accurate temperature measurements, an emissivity correction value must be set in the thermometer which accurately corresponds with the target under observation. The emissivity value can be set in the range 0.10 to 1.00 in adjustable increments of 0.01. -
Page 15: Adjusting The Averager 'Response Speed' Setting
Thermometer 4.4 Adjusting the Averager ‘Response Speed’ Setting The response speed setting allows the time constant of the Land RT8A thermometer to be adjusted to suit the application. The response speed relates to the signal output rate and gives an average reading over the duration of the response speed time value and can be set via potentiometer P1 (see Fig. -
Page 16: Mountings And Accessories
Thermometer User Guide Mountings and Accessories 5.1 General A comprehensive range of mountings and accessories is available for the RT8A thermometer, ensuring it is environmentally protected when utilised in hostile or challenging applications. NOTE If the thermometer is to be used in an area of ambient temperature higher than that specified, then the thermometer must be housed in a protective cooling jacket. - Page 17 User Guide Thermometer 3x equi-spaced mounting Thermometer removal clearance holes 6.5 to 7.0/0.26 to 0.28 Approx. 200/8.0 clearance for M6 bolts Side View 150/5.9 170/6.7 110/4.4 Top View 430/17.0 All dimensions in mm/in Not to scale Fig. 9 - RT8A thermometer protective assembly dimensions 309009 RT8A Page 11...
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Page 18: Services
Thermometer User Guide 5.2 Services When any cooling or purging accessories are utilised, it is important that the air and water supply to these facilities are fully conditioned and supplied at the recommended flow rates. The following information details the specified flow rates: S4-J Cooling Jacket Assembly Requirement: Conditioned water supply (clean and free from any... -
Page 19: Maintenance
User Guide Thermometer Maintenance 6.1 General RT8A thermometer maintenance consists mainly of ensuring that the thermometer lens is kept clean and free from contaminants and that all services to the system (water and air supplies) are set correctly and are routinely checked. -
Page 20: Emissivity
Thermometer User Guide Emissivity In order to obtain accurate temperature measurements, the emissivity value of the target surface must be known. This section of the RT8A Thermometer User Guide contains typical emissivity values of the most commonly measured materials. Where no emissivity value is quoted, this means that either the thermometer is not suitable for the measurement application or the temperature of the target is outside the thermometer’s measurement span. -
Page 21: Alloys
User Guide Thermometer 7.2 Alloys Alloys Material Emissivity Value Brass 0.30 Oxidised 0.60 Chromel & Alumel 0.30 Oxidised 0.80 Constantin & Manganin 0.05 Oxidised 0.35 Inconel 0.10 Oxidised 0.85 Monel 0.10 Oxidised 0.70 Nichrome 0.20 Oxidised 0.85 Fig. 11 - Typical Emissivity Values for Alloys 309011 RT8A Page 15... -
Page 22: Metals
Thermometer User Guide 7.3 Metals Metals Material Emissivity Value Aluminium 0.03 Oxidised 0.35 Chromium 0.07 Oxidised 0.85 Cobalt 0.04 Oxidised 0.35 Copper 0.03 Oxidised 0.80 Gold 0.02 Iron & Steel 0.10 Oxidised 0.80 Lead 0.13 Oxidised 0.65 Magnesium 0.07 Oxidised 0.75 Molybdenum 0.10... -
Page 23: Miscellaneous
User Guide Thermometer 7.4 Miscellaneous Miscellaneous Material Emissivity Value Asphalt 0.95 Asbestos (board/paper/cloth) 0.90 0.85 Graphite Brick 0.80 soot 0.95 Cement & Concrete 0.90 Cloth (all types - close weave) 0.85 [Open weave reduces emissivity] Paper & Cardboard 0.80 to 0.95 Plastics opaque 0.85... - Page 24 Thermometer User Guide RT8A Page 18...
- Page 25 PRODUCT WARRANTY Thank you for purchasing your new product from Land Instruments International. This Land manufacturer’s ‘back-to-base’ warranty covers product malfunctions arising from defects in design or manufacture. The warranty period commences on the instrument despatch date from the Land Instruments International Ltd.
- Page 26 • Tel: +44 (0) 1246 417691 • Fax: +44 (0) 1246 410585 Email: land.infrared@ametek.co.uk • www.landinst.com A M E T E K L a n d , I n c . • 1 5 0 F r e e p o r t R d .