Ametek Land Fibroptic FG User manual

Fibroptic Model FG Thermometer
with Emissivity Adjustment
© Land Instruments International, 2012
User Guide
Issue 6: September 2012
Publication Nº 198.052
Language: English

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 specied 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 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]
E-Mail: [email protected].uk
Web: www.landinst.com
USA - Pittsburgh
AMETEK Land, Inc.
Tel: [phone]
E-Mail: [email protected]
Web: www.ametek-land.com
For further details on all LAND/Ametek of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
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 classications 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.

Fibroptic Model FG Thermometer User Guide

User Guide Fibroptic Model FG Thermometer
Contents
1 Introduction 1
2 Specication 2
3 Installation 3
3.1 Positioning the Optic Head 3
3.2 Mounting Assemblies 3
3.3 Positioning the Processor 4
4 Dimensional Information 7
4.1 Optic Head dimensions 7
4.2 Processor dimensions 7
5 Electrical Connections 8
5.1 Power supply connections 8
5.2 Display connections 9
5.3 Cable requirements 10
5.4 Screening and earthing details 10
6 Checking the System 11
6.1 Over voltage protection 11
6.2 Using the TEST switch 11
6.3 Setting the Emissivity 12
6.4 Emissivity Tables 13
7 Maintenance 14
7.1 Lens assembly maintenance 14
7.2 Flexible lightguide maintenance 14
7.3 Processor maintenance 14
8 System Output 15

Fibroptic Model FG Thermometer User Guide
Fig. 1-1 Fibroptic Model FG Thermometer

Page 1
User Guide Fibroptic Model FG Thermometer
1 Introduction
Fibroptic Model FG is a bre optics based radiation thermometer, intended prima-
rily for use in the glass industry on forehearths, reners and melters.
The thermometer is designed to provide accurate and stable temperature meas-
urement. Five models are available covering the ranges: 980 to 1300°C, 1000 to
1400°C, 1200 to 1650°C, 1800 to 2400°F and 2200 to 3000°F.
The thermometer comprises an optic head and light guide assembly, coupled to a
detector/processing assembly.
The key features of Fibroptic Model FG are:
1) A 4 to 20mA linear temperature sensor, powered on a two wire loop.
2) A test function which allows the thermometer, interconnections and indicator
to be functionally checked.
3) High accuracy linearisation.
4) Very low drift with ambient temperature and time.
5) Over-voltage protection.
6) Adjustable emissivity setting, in the range 0.10 to 1.00

Page 2
Fibroptic Model FG Thermometer User Guide
2 Specification
Measurement Ranges
Fibroptic Model FG 9.8/13C : 980 to 1300°C
Fibroptic Model FG 10/14C : 1000 to 1400°C
Fibroptic Model FG 12/16.5C : 1200 to 1650°C
Fibroptic Model FG 18/24F : 1800 to 2400°F
Fibroptic Model FG 22/30F : 2200 to 3000°F
Optic Head
Lens aperture : 10mm/0.4in
Sighting angle : 100:1 (0.57°) (nominal)
Focusing distance : innity (nominal)
Maximum ambient temperature : 200°C/392°F
Light Guide
Length : 6.1m/20ft
Minimum bend radius : 50mm/2.0in
Maximum ambient temperature : 175°C/347°F
Processor
Detector : Silicon photovoltaic cell, 0.7 to 1µm
Output : Linear 4 to 20 mA
Response time : 0.5s
Maximum loop resistance : 1 kW
Accuracy:
Resolution : <0.1°C/<0.2°F
Temperature coefcient : <0.04°/° mid span
: <0.07°/° extremities
Linearisation conformity : <0.5°C/<1.0°F
Interchangeability : ±2°C/±4°F
Absolute accuracy : 5°C/9°F
Ambient temperature limits : 10 to 60°C/50 to 140°F
Power supply : 24V dc (nominal) 18 to 40 Volts
across the instrument terminals
System test output : 1275°C/2325°F ± 3°C/5°F indicated
temperature in test mode.
Emissivity : Adjustable in the range 0.10 to 1.00
in steps of 0.01

Page 3
User Guide Fibroptic Model FG Thermometer
3 Installation
3.1 Positioning the Optic Head
Refer to Fig. 3-1 for the target size table. The thermometer has a circular eld of
view with a conical sight path. The eld of view is 100:1.
To mount the optic head, use the two clamping nuts on the external M16 thread
of the optic head.
NOTES
When installing the optic head, ensure that the target lls the eld of view
at the chosen distance.
If possible, mount the optic head so that the line of sight is at right angles
to the target surface.
Ensure that the sight path is not obstructed or obscured.
Fig. 3-1 Target Size Diagram
3.2 Mounting Assemblies
A special air purge assembly, Part Nº 091.446, provides air purging and a quick,
no-tools disconnection facility for the Fibroptic Model FG thermometer.
The “Universal” adapter (Part Nº 028.825) enables the air purge assembly (Part
Nº 091.446) to be attached to other manufacturer’s ttings (e.g. Leeds & North-
rup and Honeywell). Refer to Fig. 3-3.
The Adapter (Part Nº 028.826) enables the air purge assembly (Part Nº 091.446)
to be connected to Land refractory sighting tubes type STO. Refer to Fig. 3-4.
Fig. 3-2 shows the complete range of Fibroptic Thermometer optic head mounting
accessories.
10/0.4 15/0.6 20/0.8 30/1.2 60/2.4
0 500/19.7 1000/39.4 2000/78.7 5000/196.9
Target Distance mm/in
Target Diameter mm/in
Target Diameter = Distance + 10mm/0.4in
100

Page 4
Fibroptic Model FG Thermometer User Guide
3.2.1 Installing the Model FG thermometer in a mounting assembly
1) Bolt the adapter securely to the air purge assembly via the three holes in
the lower ange of the air purge casting.
It is possible that the air purge assembly will be supplied as Part Nº
091.274 (ready tted with a simple right-angle bracket) or as Part Nº
091.262 (tted with an adjustable ange)
2) Disconnect the quick release adapter (028.823) from the bayonet tting on
the air purge assembly by rotating the adapter anti-clockwise.
3) Screw the adapter fully on to the M16 threaded optic head until it is trapped
lightly against the optic head lock nuts (Refer to Fig. 3-2).
4) Fasten the air purge assembly securely to a supporting member.
5) Connect a supply of clean air and establish a ow rate of approximately
1ltr/s/2.12cu.ft/min.
6) Connect the optic head to the air purge assembly via the bayonet tting.
3.3 Positioning the Processor
Warning
Risk of electric shock. Ensure that the processor is disconnected from the
power supply before removing the lid of the processor.
Caution
The Fibroptic Model FG Thermometer processor contains components
which can be damaged by an electrostatic discharge. Always ground n-
gers or screwdrivers before touching internal components (including con-
nector terminals and the test switch).
The bre optic light guide linking the optic head with the processor allows the
processor to be positioned in a safe place up to 6.1m/20ft from the measurement
point. The minimum bend radius of the exible lightguide is 50mm/2in.
1) To prevent the lightguide fouling machinery or causing a hazard, secure it
along its length to suitable points on the installation.
2) Do not strain the lightguide along its length when installing the thermometer.
3) Do not allow the lightguide to be immersed in oil or water etc.
The processor has four corner mounting screw holes through the base of
the box which allows it to be mounted securely on a wall, rack or console.
The holes are on 148mm/5.83in x 45mm/1.77in centres. The mounting
screw holes clearances are shown on the dimensional drawing, Fig. 4-2.
4) To gain access to the mounting screw holes, unscrew the four screws in the
lid of the processor and remove the lid.
5) Use 4.5mm/0.18in diameter screws through the mounting holes to secure
the processor in the required location.
6) Replace the processor lid and tighten the screws.