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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...
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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.
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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...
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...
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: •...
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...
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.
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: •...
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.
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.
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.
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.
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.
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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...
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...
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.
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.
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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.
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• 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 .
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