Ametek LAND RT8A Manual de usuario
Thermometer
Copyright © 2005 - 2012 Land Instruments International
User Guide
Issue 3: January 2012
Part Nº is 801450
Publication Nº PP309
Language: English
RT8A
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
personal injury.
CAUTION
Indicates a potentially hazardous situation which, if not avoided, could result in minor or
moderate injury to the user or users, or result in damage to the product or to property.
NOTE
Indicates a potentially hazardous situation which, if not avoided, could result in damage or the loss of
data.
Equipment Operation
Use of this instrument in a manner not specied by Land Instruments International may be hazardous.
Read and understand the user documentation supplied before installing and operating the equipment.
Protective Clothing, Face and Eye Protection
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 protection
must be worn. Refer to the health and safety guidelines for the machinery/equipment before installing
this product. If in doubt, contact Land Instruments International.
Electrical Power Supply
Before working on the electrical connections, all of the electrical power lines to the equipment must
be isolated. All the electrical cables and signal cables must be connected exactly as indicated in these
operating instructions. If in doubt, contact Land Instruments International.
Storage
The instrument should be stored in its packaging, in a dry sheltered area.
Unpacking
Check all packages for external signs of damage. Check the contents against the packing note.
Lifting Instructions
Where items are too heavy to be lifted manually, use suitably rated lifting equipment. Refer to the
Technical Specication for weights. All lifting should be done as stated in local regulations.
IMPORTANT INFORMATION - PLEASE READ
Contact Us
UK - Droneld
Land Instruments International
Tel: +44 (0) 1246 417691
E-Mail: [email protected].uk
Web: www.landinst.com
USA - Pittsburgh
AMETEK Land, Inc.
Tel: +1 412 826 4444
E-Mail: [email protected]
Web: www.ametek-land.com
For further details on all LAND/Ametek ofces, 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. Damage caused in transit is the responsibility of the carrier not the supplier.
DO NOT RETURN a damaged instrument to the sender as the carrier will not then consider a claim. Save
the packing with the damaged article for inspection by the carrier.
Return of Goods for Repair
If you need to return goods for repair please contact our Customer Service Department. They will be
able to advise you on the correct returns procedure.
Any item returned to Land Instruments International should be adequately packaged to prevent damage
during transit.
You must include a written report of the problem together with your own name and contact information,
address, telephone number, email address 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, environmental monitoring and non-contact
temperature measuring instrumentation.
Approvals apply in the USA
This instrument complies with current European directives relating to Electromagnetic
Compatibility 89/336/EEC and Low Voltage Directive 73/23/EEC.
Operation of radio transmitters, telephones or other electrical/electronic devices in close proximity
to the equipment while the enclosure doors of the instrument or its peripherals are open, may cause
interference and possible failure where the radiated emissions exceed the EMC directive.
The protection provided by both CE and IP classications to this product may be invalidated if alterations
or additions are made to the structural, electrical, mechanical or pneumatic parts of this system. Such
changes may also invalidate the standard terms of warranty.
Copyright
This manual is provided as an aid to owners of Land Instruments International’s products and contains
information proprietary to Land Instruments International. This manual may not, in whole or part, be
copied, or reproduced without the expressed written consent of Land Instruments International Ltd.
Copyright © 2012 Land Instruments International.
Thermometer User Guide
RT8A
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:
User Guide Thermometer
RT8A
Contents
1 Introduction 1
1.1 General Introduction 1
1.2 About the RT8A thermometer 1
2 Instrument Specications 2
2.1 Specication Table 2
2.2 Thermometer Dimensions 3
2.3 Target Spot Size 3
2.4 Thermometer Installation 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 Adjusting the Averager ‘Response Speed’ Setting 9
4.5 Settings Archive 9
5 Mountings and Accessories 10
5.1 General 10
5.2 Services 12
6 Maintenance 13
6.1 General 13
7 Emissivity 14
7.1 Refractories 14
7.2 Alloys 15
7.3 Metals 16
7.4 Miscellaneous 17
Thermometer User Guide
RT8A
Page 1
User Guide Thermometer
RT8A
1 Introduction
1.1 General Introduction
This publication provides the necessary information required to safely operate
the Land RT8A Thermometer.
It is important to fully check all equipment with which you have been
supplied.
The equipment must only be used, maintained and serviced by suitably
trained personnel, capable of carefully following the procedures and guidelines
given 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 equipment is in general use.
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:
• stand alone operation
• adjustable response speed
• 4 to 20mA loop powered output, linear over the temperature span of
the instrument
• built-in emissivity controls
Fig. 1 Land RT8A thermometer 309001
Page 2
Thermometer User Guide
RT8A
Operating Temperature Range:
(focused at innity)
RT80A
RT81A
RT82A
RT83A
0 to 250°C
0 to 500°F
0 to 500°C
0 to 1000°F
Specied Temperature Range: RT80A
RT81A
RT82A
RT83A
0 to 250°C
30 to 500°F
0 to 500°C
30 to 1000°F
Output: Linear 4 to 20mA over temperature range
Field of view: See section 2.2
Emissivity: 0.10 to 1.00 (adjustable in 0.01 increments)
Waveband: 8 to 14μm (nominal)
Response time(3t): 1 to 10s (adjustable)
Resolution: <0.2°C
Accuracy (absolute): <½° of span
(within specied temperature range)
Ambient temperature limits: -5 to 50°C/23 to 122°F (specied)
-5 to 70°C/23 to 158°F (storage)
Drift with ambient temperature: <1.5° per 10° change in ambient temperature
Drift with time: <1°C (2°F) per year
Power supply voltage limits: 11 to 45V d.c. (26V d.c. nominal)
Maximum load resistance: 1KΩ
EMC: EN 50 082-2 (immunity)
EN 50 081-1 (emission)
IEC 61010 (electrical safety)
Sealing: Designed to meet IP65/NEMA4 requirements
Vibration: 3g any axis (10 to 300Hz)
Weight: 0.5kg/1.1lb
2 Instrument Specifications
2.1 Specification Table
Page 3
User Guide Thermometer
RT8A
2.2 Thermometer Dimensions
Fig. 2 - Land RT8A thermometer dimensions 309002
2.3 Target Spot Size
Fig. 3 - Land RT8A thermometer target 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 Target Size (mm)
Distance to Target (mm)
Minimum Target Size (in)
Distance to Target (in)
0 300 500 1000 1500 2000 2500
21 26 34 54 86 122 156
0 11.8 19.7 39.4 59.1 78.7 98.4
Page 4
Thermometer User Guide
RT8A
The Land RT8A thermometer operates by sensing radiation from within a well
dened ‘eld of view’. The intersection of this eld of view with the intended
target, determines the ‘target spot’, the area where the temperature is
measured. Fig. 3 shows the RT8A thermometer target spot size table.
2.4 Thermometer Installation
The location of the RT8A thermometer should be carefully chosen, such that
it is easily accessible and in a position not unnecessarily exposed to heat,
fumes or liquid spray. The sight path between the thermometer and the
target, should be as free as possible from smoke, liquid spray and from the
intrusion of machinery. The axis of the thermometer should be at right angles
to the target surface, however, an angle of up to 45° from the normal is
acceptable. It is also important that the intended target completely lls the
thermometer eld of view at the selected installed distance and that no part
of the sight path is obstructed.
When choosing a suitable location for mounting 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 ensure that the
thermometer lens is kept free from such airborne contaminants. Ensure that a
suitably conditioned air supply is available.
• If the surrounding ambient temperatures of the installation area are
outside the thermometer specication, then a Land water cooled protective
jacket must be utilised to ensure that the thermometer operates at the
specied ambient temperature. Ensure that a suitably conditioned water
supply is available.
NOTE
In some RT8A applications, a sighting tube may be required to
eliminate any unwanted reections from entering the thermometer
and to keep the sight path clear from obstructions. Sighting tubes can
also be used to create a ‘stand-off’, between the thermometer and the
process under observation.
When selecting a suitable sighting tube, it is important to ensure that
the internal bore of the tube is at least 25% greater than the largest
target spot size over the tubes length. All distances must be measured
from the thermometer datum, which is located at the front of the
thermometer.
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