Land Ametek RT8A User manual

RT8A Thermometer
Installation Guide
for Roadstone Applications
Issue 3
25 November 2016
Publication Nº 806007
Language: English
© Land Instruments International, 2010 - 2016

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.
Signs and Symbols used on equipment and Documentation
Caution, risk of electric shock.
Caution, attention to possibility of risk of damage to the product, process or surroundings. Refer
to instruction manual.
Caution, hot surface.
Protective Conductor Terminal.
Observe precautions for handling electrostatic discharge sensitive devices.
Equipment Operation
Use of this instrument in a manner not specied by Land Instruments International may be hazardous.
Read and understand the user documentation supplied before installing and operating the equipment.
The safety of any system incorporating this equipment is the responsibility of the assembler.
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 Specication for weights. All lifting should be done as stated in local regulations.
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
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.
Signs and Symbols used on equipment and Documentation
Caution, risk of electric shock.
Caution, attention to possibility of risk of damage to the product, process or surroundings. Refer
to instruction manual.
Caution, hot surface.
Protective Conductor Terminal.
Observe precautions for handling electrostatic discharge sensitive devices.
Equipment Operation
Use of this instrument in a manner not specied by Land Instruments International may be hazardous.
Read and understand the user documentation supplied before installing and operating the equipment.
The safety of any system incorporating this equipment is the responsibility of the assembler.
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 Specication for weights. All lifting should be done as stated in local regulations.
IMPORTANT INFORMATION - PLEASE READ
Contact Us
UK - Droneld
Land Instruments International
Tel: [phone]
Email: [email protected]
Web: www.landinst.com
USA - Pittsburgh
AMETEK Land, Inc.
Tel: [phone]
Email: [email protected]
Web: www.ametek-land.com
China
AMETEK Land China Service
Tel: [phone] ext 122
Email: [email protected]
Web: www.landinst.com
India
AMETEK Land India Service
Tel: +91 - 80 67823240
Email: [email protected]
Web: www.landinst.com
For further details on all AMETEK Land oces, 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
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 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 © 2016 Land Instruments International.
MARCOM0311, Issue 7, 01 November 2016
Approvals apply in India

RT8A Thermometer Installation Guide

RT8A ThermometerInstallation Guide
Contents
1 About this Guide 1
2 Preliminary Checks 1
3 System Overview 2
4 Positioning the Thermometer 3
4.1 Drier Exit Chute 3
4.2 Mixer 4
4.3 Mixer Discharge 5
5 Using a Sighting Tube 6
6 Mounting the Thermometer 7
7 Thermometer Cooling & Purging 7
8 Air Supply Requirements 8
9 Power Supply Requirements 8
10 Electrical Connections 9
10.1 General Connections 9
11 Thermometer Installation 10
12 Checking the System 12
12.1 Pre-operational checks 12
12.2 Checks during operation 12
12.3 Cleaning the Air Filter 12
13 Cleaning the Lens 13

RT8A Thermometer Installation Guide

Page 1
RT8A ThermometerInstallation Guide
1 About this Guide
This Installation Guide gives the basic information needed to install the RT8A
thermometer correctly and get it working. More comprehensive information is
given in the User Guide.
2 Preliminary Checks
Check the thermometer type and serial number against the details given on the
delivery note.
Check that all the accessories required have been supplied.
Also check that the indicator/controller type and serial number correspond with
the delivery note and that the ow restrictor on the air lter system is stamped
‘HF’.
Fig. 1 Components of a typical temperature measurement system
Indicator
Power Supply Unit
Air Filter System
Sight Tube Jacket Thermometer Back Cap

Page 2
RT8A Thermometer Installation Guide
3 System Overview
The Roadstone thermometer is mounted inside a protection jacket which has a
mounting ange to facilitate mounting into the mixer/drier (in some cases via a
sighting tube).
Cooling and purging air is supplied via the air purge inlet in the thermometer
jacket and electrical power is connected to the thermometer via a demountable
electrical connector.
Access to the thermometer speed of response and emissivity controls is via a
removable cover on the rear of the thermometer.
Fig. 2 System overview
Sight Tube Jacket Thermometer Back Cap
Retaining Clips
Cable Gland
Electrical
Connector
Mounting Flange
Emissivity/Speed of Response
Controls (behind cover)
Air Purge Inlet
Plug

Page 3
RT8A ThermometerInstallation Guide
4 Positioning the Thermometer
4.1 Drier Exit Chute
Mount the thermometer on a sight tube and insert the tube vertically through the
top plate of the exit chute, approximately midway along the chute.
To ensure that the sight path is not obscured by airborne dust , the tip of the
sight tube must not be more than 50mm (2 in) above the level of the stone (See
Fig. 3).
Fig. 3 Temperature Measurement at the Exit Chute
Exit Chute
Sight Tube
and collar
Flow
50mm / 2in
minimum

Page 4
RT8A Thermometer Installation Guide
4.2 Mixer
Mount the thermometer either vertically on top of the mixer, or use a sight tube
to mount it on the side of the mixer (See Fig. 4).
Choose a point where the thermometer will not see the mixer paddles or, on a
batch mixer, reected ame via the discharge chute.
Ensure that the thermometer lens cannot be splashed with the binder. If
this cannot be prevented it is suggested that a shutter is tted to protect the
thermometer during the spray period.
Fig. 4 Temperature Measurement at the Mixer
Sight Tube
Mixer
Stand Pipe
Alternative
Mounting

Page 5
RT8A ThermometerInstallation Guide
4.3 Mixer Discharge
Mount the thermometer below the mixer/storage bin discharge doors to view a
solid curtain of falling material (See Fig. 5).
Alternatively, position the thermometer such that it views into the skip or lorry
and measures the temperature of the collected material.
It is important to ensure that the thermometer’s eld of view is completely lled
by the target.
Fig. 5 Temperature Measurement at the Mixer Discharge
Solid curtain of falling material
Mixer
Collected Material
Mixer Doors
≈2m
FS6 Sighting
Tube

Page 6
RT8A Thermometer Installation Guide
5 Using a Sighting Tube
When fabricating the sighting tube be sure that the minimum internal diameter is
no less than that shown in Fig. 6 for the length of sighting tube.
Alternatively LAND offer a suitable sighting tube, i.e. Type FS6 150mm (6in) long.
An adjustable sighting tube assembly facilitates efcient temperature
measurement in the exit chute where airborne dust would otherwise adversely
affect the thermometer readings.
A locking collar welded to the top plate of the chute enables the sight tube to be
adjusted to the required height above the stone (See Fig. 3).
A plain, xed sight tube is sufcient for measurement in the mixer.
Fig. 6 Sighting tube dimensions
1.04 1.06 1.14 1.48 1.73
0 3.9 7.9 11.8 15.7
Minimum Sight Tube ID Size (in)
Sight Tube Length (in)
26.5 27 29 37.5 44
0 100 200 300 400
Minimum Sight Tube ID Size (mm)
Sight Tube Length (mm)

Page 7
RT8A ThermometerInstallation Guide
6 Mounting the Thermometer
When the sight tube has been tted to the exit chute, use (3 off) M6 x 20 screws
and nuts to attach the thermometer jacket to the mounting ange of the tube.
The thermometer jacket also has a mounting boss on its base which can be used
for mounting beneath the mixer/storage hopper.
Fig. 7 View on bottom of jacket showing mounting holes
7 Thermometer Cooling & Purging
An air supply is required for cooling and purging the thermometer.
The air keeps the thermometer electrical circuits cool as well as keeping the
thermometer lens clean.
Connect the air is supply to the 1in BSP air inlet or use the pipe adaptor, part
number 150.786 which will accept a 10mm ID pipe.
IMPORTANT
The air supply to the jacket must be left on whenever the plant is
running, and for not less than half an hour after drying/mixing is
complete.
2 Holes M6 x 1P Thread
8mm deep
75.2mm/2.9in
70mm/2.8in CRS
View on bottom of jacket
Jacket Mounting: The jacket can be mounted using
the two threaded holes (M6 x 1P) on the underside

Page 8
RT8A Thermometer Installation Guide
8 Air Supply Requirements
A relatively cool, dry, clean air supply of 1.75 to 10.5 Kg/cm2 (25 to 150 lb/in2)
pressure is required for use with the System A/A air lter system. Connect the
air supply to the thermometer jacket and set the ow rate to approximately 7
litres/second (15 cu ft per minute).
Fig. 8 Air supply system interconnections
9 Power Supply Requirements
The thermometer works on a 4 to 20mA current loop and gives a 4 to 20mA
linear output over its temperature range (either 0 to 250°C, 0 to 500°C, 0 to
500°F or 0 to 1000°F depending on the thermometer type).
The thermometer requires a power supply of 11 to 35V d.c. which is normally
supplied by the LAND power supply unit or an indicator with loop power option.
The power supply unit and the indicator require an a.c. supply of 110 or 240 volts
(specied at time of ordering).
Air Purge Inlet
Air in
Land System A/A Air Filter System

Page 9
RT8A ThermometerInstallation Guide
10 Electrical Connections
10.1 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. 9).
The connection to the thermometer can be made via any of the following:
• Pre-wired 4m cable (Land Part No. 029.673)
• 6-way plug (Land Part No. 206.551)
• 6-way plug housed in protective jacket end cap (Land Part No. 091.562)
Thermometer Pin Function Cable Colour End Cap Pin Nº
1 - - -
2 - - -
3 V+, 4 to 20mA Red 5
4 - - -
5 - - -
6 V-, 4 to 20mA Black 6
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.
• Push the plug into the socket, ensuring that the locking sleeve slides
forwards, locking the plug to the socket.
To disconnect the 6-way plug to the RT8A thermometer:
• Grip the locking sleeve portion of the plug.
• Slide the locking sleeve rearwards to release the locking mechanism and
disconnect the plug from the thermometer socket.
Fig. 9 Connecting the 6-way plug to the RT8A Thermometer
KeywayLugs
Marker
Marker
3
60V (Black)
+ve Volts (Red)
View on connector terminal

Page 10
RT8A Thermometer Installation Guide
11 Thermometer Installation
1) Insert the thermometer into the thermometer jacket.
2) Unscrew the small circular cap at the rear of the thermometer to reveal the
emissivity and time response controls (See Fig. 10).
F ast
Screw-on cap covering
thermometer controls
Rear face of RT8A
thermometer
Electrical Connector
Fig. 10 Location of RT8A thermometer controls screw-on cap
3) Set the emissivity control to 95 using a small screwdriver (see Fig. 11).
Emissivity
Example = 0.95
SW1
SW2
P1
Response Speed
Fully anticlockwise = 1 sec
Fully clockwise = 10 sec
Emissivity
0.10
0.80
0.95
0.92
1.00
SW 1
1
8
9
9
0
SW 2
0
0
5
2
0
Example settings
= 0.95
Fig. 11 Emissivity and Response Speed setting
4) For drier exit applications, set the time constant control to mid span.
For mixer/bin exit applications, set the time constant to 1 second, fully
anticlockwise.
5) Replace the circular cap.
Refer to the User Guide for a further explanation of the Emissivity and Time
Constant controls.

Page 11
RT8A ThermometerInstallation Guide
Fig. 12 Thermometer, power supply and indicator current loop
The thermometer, power supply and indicator are linked together on a current
loop. Note: the indicator in the negative conductor as shown in Fig. 12.
-
+
-+
RT8A Thermometer
Indicator
(Note: Indicator must be installed
in the negative connector)
Vo
VR1
N
E
L
AC Supply
SW1
90/130 180/260
Power Supply Unit
Output
131211
Alarms
(optional)
Thermometer
Drive RTN
+
-
Power supply
24V d.c./115V a.c./230V a.c.
Fig. 13 Thermometer, power supply and indicator electrical connections

Page 12
RT8A Thermometer Installation Guide
12 Checking the System
12.1 Pre-operational checks
Make the following checks before putting the system into operation:
1) Check that there is no obscuration of the sight path between the
thermometer and the material to be measured.
2) Check that the thermometer lens is clean. If it is dirty, see Section 12.
3) Check that the air supply is ON and the pressure/ow rates are correct.
Refer to Section 8.
4) Check that the thermometer power supply unit and indicator/controller are
correctly interconnected. Refer to Section 10.
5) Check that the Emissivity control is set to 95. Refer to Section 10.
6) Check that the speed of response control is set to suit the application (1 to
10 seconds). Refer to Section 11.
12.2 Checks during operation
During the rst day of operation make frequent checks of the lens to ensure that
it is keeping clean.
The period between the checks can be lengthened progressively depending on
site conditions.
If the lens becomes dirty, make the following checks:
1) Check the air supply.
2) Ensure that the air pressure and ow rates are being maintained (Refer to
Section 8).
3) Clean the air lter and drain it if necessary.
4) Clean the lens (see Section 12) and check again after short periods of
operation.
12.3 Cleaning the Air Filter
Periodically, drain the air lters and (if necessary) change the lter elements.
Full instructions will be found with the leaet supplied with the air system.
After cleaning, check that the ow and pressure are as listed in Section 8.

Page 13
RT8A ThermometerInstallation Guide
13 Cleaning the Lens
The RT8A thermometer has a scratch-resistant coated lens. However, reasonable
care is still needed to avoid lens damage.
To clean the lens:
1) Remove the jacket backcap and disconnect the electrical connector.
2) Remove the thermometer from the jacket.
3) Blow off any loose dust on the lens and wipe the lens with a soft cloth or
brush.
4) Clean the lens face with soap and water or alcohol.
5) Prior to replacing the thermometer in the jacket ensure that the inside of
the jacket is free of debris.
6) Replace the thermometer in the jacket.
7) Reconnect the electrical connector.
8) Replace the jacket backcap.

Page 14
RT8A Thermometer Installation Guide