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Thermometer

User Guide

Issue 3: January 2012

Part Nº is 801450

Publication Nº PP309

Language: English

RT8A

Содержание LAND RT8A

Страница 2: ...n It is possible that this equipment is to be installed on or near to machinery or equipment operating at high temperatures and high pressures Suitable protective clothing along with face and eye prot...

Страница 3: ...s etc Design and Manufacturing Standards The Quality Management System of Land Instruments International is approved to BS EN ISO 9001 for the design manufacture and on site servicing of combustion en...

Страница 4: ...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 addre...

Страница 5: ...lation 4 3 Electrical Connections 5 3 1 General Connections 5 3 2 Loop Resistance 6 4 Thermometer Operation 7 4 1 General 7 4 2 Location of Controls 7 4 3 Adjusting the Emissivity Setting 8 4 4 Adjust...

Страница 6: ...Thermometer User Guide RT8A...

Страница 7: ...in this User Guide This User Guide should be read thoroughly before proceeding with any operations detailed within it and it is advisable that it is kept readily available for reference when the equip...

Страница 8: ...se time 3t 1 to 10s adjustable Resolution 0 2 C Accuracy absolute of span within specified temperature range Ambient temperature limits 5 to 50 C 23 to 122 F specified 5 to 70 C 23 to 158 F storage Dr...

Страница 9: ...et spot size table 309003 114 4 49 80 5 3 17 158 6 22 Mounting pad 2 holes 1 4in BSW 7 0 3 deep on 25 0 98 centres All dimensions in mm in Not to scale 0 83 1 02 1 34 2 13 3 39 4 80 6 14 Minimum Targe...

Страница 10: ...nting the RT8A thermometer the following criteria should be considered If the installation area is not clean or free from dust smoke or water spray then a Land air purge system must be utilised to ens...

Страница 11: ...Electrical Connections To connect the 6 way plug to the RT8A thermometer see Fig 4 Align the red marker near the lugs of the plug with the red marker located above the keyway in the thermometer socket...

Страница 12: ...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 Fig...

Страница 13: ...ket and back cap 4 2 Location of Controls The Emissivity and Response Speed control switches are located on the rear face of the thermometer The controls are protected by a screw on cap see Fig 6 NOTE...

Страница 14: ...switches see Fig 7 Switch SW1 denotes the first figure after the decimal point of the emissivity value Switch SW2 denotes the second figure after the decimal point of the emissivity value e g for an e...

Страница 15: ...witches Turn the potentiometer P1 anti clockwise When P1 is turned fully anti clockwise the response speed is 1 second 3t To decrease the response speed value i e make the response slower Remove the s...

Страница 16: ...must be housed in a protective cooling jacket If the thermometer is to be used in an area where the atmosphere contains a high proportion of dust smoke steam etc then the thermometer must be used in...

Страница 17: ...tective assembly dimensions 309009 3x equi spaced mounting holes 6 5 to 7 0 0 26 to 0 28 clearance for M6 bolts Thermometer removal clearance Approx 200 8 0 150 5 9 170 6 7 110 4 4 430 17 0 117 4 6 Al...

Страница 18: ...tes S4 J Cooling Jacket Assembly Requirement Conditioned water supply clean and free from any contaminants Flow rate 1ltr min or 0 035cu ft min S4 P Air Purge Assembly Requirement Conditioned air supp...

Страница 19: ...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 It is recommended...

Страница 20: ...t either the thermometer is not suitable for the measurement application or the temperature of the target is outside the thermometer s measurement span If you have a query regarding the emissivity of...

Страница 21: ...Material Emissivity Value Brass Oxidised 0 30 0 60 Chromel Alumel Oxidised 0 30 0 80 Constantin Manganin Oxidised 0 05 0 35 Inconel Oxidised 0 10 0 85 Monel Oxidised 0 10 0 70 Nichrome Oxidised 0 20 0...

Страница 22: ...per Oxidised 0 03 0 80 Gold 0 02 Iron Steel Oxidised 0 10 0 80 Lead Oxidised 0 13 0 65 Magnesium Oxidised 0 07 0 75 Molybdenum Oxidised 0 10 0 80 Nickel Oxidised 0 04 0 85 Palladium 0 05 Platinum 0 07...

Страница 23: ...Cloth all types close weave Open weave reduces emissivity 0 85 Paper Cardboard 0 80 to 0 95 Plastics opaque transmission 0 1 transmission 0 4 0 85 0 75 0 45 Paints oils enamels lacquers aluminium 0 9...

Страница 24: ...Page 18 Thermometer User Guide RT8A...

Страница 25: ...rs accessories and mountings and special instruments based on UNO Application dedicated processors based on LANDMARK Graphic ABTS S and ABTS U FTS VDT S and VDT U DTT FLT5 A This 36 month warranty is...

Страница 26: ...onditions outside the Ambient Temperature Humidity and Vibration rating of the product environmental contamination solvent vapours deposition of airborne contamination cooling liquids of non neutral p...