Fibroptic Model FG Thermometer
with Emissivity Adjustment
© Land Instruments International, 2012
User Guide
Issue 6: September 2012
Publication Nº 198.052
Language: English
Page 1: ...Fibroptic Model FG Thermometer with Emissivity Adjustment Land Instruments International 2012 User Guide Issue 6 September 2012 Publication N 198 052 Language English...
Page 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...
Page 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...
Page 4: ...Fibroptic Model FG Thermometer User Guide...
Page 5: ...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...
Page 6: ...Fibroptic Model FG Thermometer User Guide Fig 1 1 Fibroptic Model FG Thermometer...
Page 7: ...0 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 Fibro...
Page 8: ...6 1m 20ft Minimum bend radius 50mm 2 0in Maximum ambient temperature 175 C 347 F Processor Detector Silicon photovoltaic cell 0 7 to 1 m Output Linear 4 to 20 mA Response time 0 5s Maximum loop resis...
Page 9: ...scured Fig 3 1 Target Size Diagram 3 2 Mounting Assemblies A special air purge assembly Part N 091 446 provides air purging and a quick no tools disconnection facility for the Fibroptic Model FG therm...
Page 10: ...Fibroptic Model FG Thermometer processor contains components which can be damaged by an electrostatic discharge Always ground fin gers or screwdrivers before touching internal components including con...
Page 11: ...0 26 100 0 3 94 145 0 5 71 80 0 3 15 40 0 1 57 Quick Release Purge Bracket Part N 091 274 1 hole dia 11 0 0 43 Purge air inlet dia 6 35 0 25 6 35 0 25 145 0 5 71 Purge air inlet dia 6 35 0 25 4 holes...
Page 12: ...ighting tubes 3 x screws M4 x 10 0 4 CSK HD 1 hole dia 34 0 1 3 All dimensions in millimetres inches All dimensions in millimetres inches 4 holes dia 7 2 0 28 equi spaced on 101 6 4 0 pcd 3 holes dia...
Page 13: ...Head dimensions 4 2 Processor dimensions Fig 4 2 Processor dimensions All dimensions in millimetres inches 106 5 4 19 17 5 0 69 18 5 0 73 dia M16 x 1 0P 13 0 0 51 dia All dimensions in millimetres in...
Page 14: ...any hazardous live voltages Fig 5 1 Power Supply Voltage in Relation to Loop Resistance 1 Connect the processor power supply and indicator in a 2 wire current loop with the indicator in the negative...
Page 15: ...ond with 4mA for Tmin and 20mA for Tmax for the ther mometer connected Refer to Table 5 1 Thermometer Model Tmin Tmax Fibroptic Model FG 9 8 13C 980 C 1300 C Fibroptic Model FG 18 24F 1800 F 2400 F Fi...
Page 16: ...erence is expected use a screened cable BELDEN 9302 or equivalent For extended high temperature environments use a TEFLON insulated cable BELDEN 83319 or equivalent 5 4 Screening and earthing details...
Page 17: ...lid 3 Refer to Fig 6 1 If LED 1 is illuminated an over voltage condition exists and must be remedied as soon as possible Note It is possible that when over voltage levels are small or intermittent the...
Page 18: ...ge for repair 6 3 Setting the Emissivity To set the emissivity on a Model FG thermometer the two emissivity pots see Fig 6 1 on the main PCB should be manually set to correspond with the calcu lated e...
Page 19: ...Oxidised 0 80 Tungsten 0 39 Zinc 0 50 Oxidised 0 60 Alloys Material Emissivity Brass 0 20 Oxidised 0 70 Chromel Alumel 0 30 Oxidised 0 80 Constantin Manganin 0 25 Oxidised 0 65 Inconel 0 30 Oxidised...
Page 20: ...om its mounting to gain reasonable access to the lens If necessary clean the lens with a soft cloth and a suitable lens cleaning fluid 7 2 Flexible lightguide maintenance Make regular checks of the li...
Page 21: ...4 to 20mA linear over the system temperature range Example 1 Celsius Model For the FG 9 8 13C model the output at temperature T C is given by 4 T 980 x 16 mA 1300 980 Example 2 Fahrenheit Model For th...
Page 22: ...Page 16 Fibroptic Model FG Thermometer User Guide...
Page 23: ...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...
Page 24: ...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...
