Related Manuals for Lamtec LT2
Summary of Contents for Lamtec LT2
- Page 1 User Manual Lambda Transmitter LT2 Lambda Probe LS2 Sensors and Systems for Combustion Engineering www.lamtec.de...
-
Page 3: Table Of Contents
4.2.1 LT2 Lambda Transmitter in Wall Mounting Case ......13 Cold-start Delay ............14 Options. - Page 4 8.2.1 Checking the LT2's Measuring Input ....... . . 36 Maintenance .
-
Page 5: General Information
This Operating Manual explains the functioning, mounting, installation, maintenance and op- eration of the Lambda Transmitter LT2. Other booklets, such as Product Information for exam- ple, provide further information but must never be used as a substitute for this Operating Manual. -
Page 6: Safety
Safety Safety Explanation of the Symbols in the Safety Notes The following symbols are used in this document to draw the user's attention to important safe- ty information. They are located at points where the information is required. It is essential that the safety information is observed and followed, and that applies particularly to the warnings. -
Page 7: Proper Use - Conditions Of Use
Safety Proper Use - Conditions of Use Application The LT2 Lambda Transmitter is an O measuring instrument for the continuous measurement of O concentration in non-combustible gases in the super-stoichiometric domain, in conjunc- tion with the LS2 Lambda Probe. Suitable for gas measurements with a small proportion of combustible components (<... -
Page 8: Permissible Users
User groups For the handling of the Lambda Transmitter LT2, three user groups are required: • Service technicians of LAMTEC or its OEM customers and/or trained customer personnel: –... -
Page 9: Safety Equipment/Safety Measures
To avoid damage, always observe the respective security notices. Preventive measures for improving operating safety If the LT2 is used in conjunction with control and steering technology, the operator must ensure that any breakdown or failure of the LT2 device does not cause inadmissible damage or dan- gerous operating states. -
Page 10: Important Notes On Shutdown/Return To Service
Safety Important Notes on Shutdown/Return to Service The Lambda Transmitter and the Lambda Probe form a high quality electronic system. Treat them with care at all times, including during shut-down, transport and storage. Shut-down NOTICE Do not switch the Lambda Transmitter off as long as the Lambda Probe is mounted; including when the relevant facility has been shut down. -
Page 11: Overview
Overview Overview System Overview The LT2 Lambda Transmitter is an all-purpose O measuring device based on microprocessor for direct measurement of the O concentration under super-stoichiometric range (λ > 1) used together with LS2 Lambda Probe. Fig. 3-1 System overview LT2 Lambda Transmitter... -
Page 12: Brief Description
(EL) and gas com- bustion systems in the super-stoichiometric domain ( > 1)without special gas purification. Fig. 3-2 LT2 Lambda Transmitter wall-mounting housing IP65 400x300x150 mm (HxWxD) type 657R102-... -
Page 13: Technical Description
Technical Description Technical Description Advantages of the Measurement Principle • No gas treatment needed, measurement directly in the humid flue gas • Setting time at 90 %-value (T ) < 20 s • Measuring gas temperature depending on the design up to 300 °C (572 °F)/up to 1200 °C (2192 °F) •... -
Page 14: Lt2 Lambda Transmitter
10 Mains connection (plug) 11 Terminal bar x 2 12 Relay module type 660R0017 Fig. 4-1 LT2 Lambda Transmitter in wall-mounting housing type 657R1025 with dis- play and operating unit type 657R0831 Accessible after removing the front panel with the main switch (POWER) Fig. -
Page 15: Cold-Start Delay
Technical Description Cold-start Delay Serves to suppress false measurements while the probe warms up to operating temperature. Cold-start delay is always activated after POWER OFF and probe replacement. The cold-start delay can be aborted at any time • via the multifunction key •... -
Page 16: Options
Technical Description Options 4.4.1 Display and Operating Unit Type 657R0831 Fig. 4-3 Optional with LT2 in wall-mounting housing type 657R102... -
Page 17: Remote Display Software
Technical Description 4.4.2 Remote Display Software The Remote Display Software is a PC software to configure the LT2. Use it instead of the dis- play and operating unit, and to store and restore the data set. • Remote Display Software including interface RS 232 module for PC type 657R1101 •... -
Page 18: Calculation Of Combustion Efficiency
Technical Description 4.4.3 Calculation of Combustion Efficiency The calculation follows the formula: 100 (q Exhaust gas loss through free heat Exhaust gas loss through bounded heat ) * [A /21 - O + B] Calculation of exhaust gas losses is based on the following mean fuel values: = 0.68;... -
Page 19: Firing Rate Dependent And Fuel Specific Limit Values/Limit Curves
Firing Rate Dependent and Fuel Specific Limit Values/Limit Curves The burner firing-rate value or some other measured quantity is supplied via analogue input 4 or via LAMTEC SYSTEM BUS. Instead of fixed limit values you can enter fuel-specific curves with 2 up to a maximum of 8 checkpoints. -
Page 20: Lamtec System Bus (Lsb)
Function NOTICE The data of the LT2 is only transferred by LAMTEC SYSTEM BUS if the device is set to MEAS- URING and not to MAINTENANCE or ERROR. If the communication works properly LED 1 and LED 2 are flashing. -
Page 21: Commissioning/Decommissioning
(optional) display and operating unit, or by a PC in combination with the Remote Display Software. The LT2 itself has only limited operating capabilities, which do not allow LT2 to display or process all the functions necessary for operation, maintenance and servicing. -
Page 22: Internal Display And Operating Elements
Commissioning/Decommissioning 6.1.3 Internal Display and Operating Elements Legend: LED is off flashes lights up Multifunction key T 2 Operation (green) LED 6 Operating mode (green) LED 5 Maintenance switch S 1 Operation Measurement Calibration Offset compensation (flashes slowly) With test gas/comparative measure- ment (flashes quickly) Maintenance mode off Maintenance mode on... -
Page 23: Decommissioning
The measurement site should be protected on site against direct contact with rainwater, through a sufficient large roof. NOTICE The connecting cable of the probe has a length of 2 m. The LT2 or the PCB must be installed in the vicinity of the probe. WARNING! Escape of hot, explosive, and harmful gases! Hot, explosive, and harmful gases can escape during work on the flue gas channel. - Page 24 NOTICE Apply the collar’s thread, the PIF’s thread and the clamping ring with anti-size-paste type 650R1090. This avoids the seizing and guaranties a smooth dismounting of the LT2 probe. 3. Screw in the PIF without probe, and tighten. 4. Seal the PIF aperture with a blank plug if necessary.
- Page 25 Commissioning/Decommissioning Fig. 6-3 Correct probe installation in flue gas duct Fig. 6-4 Wrong probe installation CAUTION! Hot probe! The probe may be hot during mounting/demounting! Risk of burns! Wear appropriate protective clothing. Be careful. Do not place the hot probe on flammable material. NOTICE To ensure that there is enough air circulation, the probe must be freely insulated from its en- vironment in a radius of 5 cm.
-
Page 26: Measurement Start-Up
Commissioning/Decommissioning Measurement Start-up • Connect the probe but do not install it Switch to MAINTENANCE either via the display and operating unit in menu [diag] or with the maintenance switch S1 Fig. 6-6 Maintenance (orange) LED 1 NOTICE The maintenance switch always has priority. –... - Page 27 NOTICE "Probe temperature T" The LT2 Lambda Transmitter and LS2 Lambda Probe are not adjusted to each other. The LS2 Lambda Probe is subject to production dispersion, which can be compensated by offset cali- bration and probe temperature. A probe calibration with test gas is not necessary.
-
Page 28: Install The Probe In The Pif And Align The Ged
(GED)/flue gas bypass tube. Measurement takes place directly in the probe. The LS2 probe is connected to the probe connection box (PCB) or LT2 via a 4 strand cable with two plugs. Union nut... - Page 29 11.4 Electric Connections Device Side until chapter 11.4 Electric Connections Device Side Alternatively, direct connection LS2 LT2 without SAK is possible via a customised cable (2 m, 5 m, 10 m and 20 m), see wiring diagram chapter 11.4 Electric Connections Device Side.
-
Page 30: Setting Up Service Warnings
Commissioning/Decommissioning 6.4.2 Setting up Service Warnings Service warnings 1 and 2 are designed to draw attention to regular servicing. The service warnings can be freely defined by the operator, e.g. Service warning 1 check probe Service warning 2 dismantle and clean probe The appropriate cycle times can be specified via the parameters 1260 and 1261 in the range 1 to 65535 hours. -
Page 31: Operation
Operation Operation Operation/Measurement Value Display • Display and operating unit (optional) is included as a standard in LT2 19” for panel installation. • Service and diagnostic software (optional) • Limited by multifunction key and monitor output 7.1.1 Measurement Value •... -
Page 32: Commands
Operation 7.1.2 Commands • Abort ’Cold-start delay’ Directly during measurement • Offset compensation Compensate probe to ambient air, 21 % vol O • Calibration Perform measured value compensation by compara- tive measurement. Test calibration only in connection with a special testing device or with LS2-HT possible. •... -
Page 33: General Instructions For Operation
Operation General Instructions for Operation 7.2.1 Measurement During Distinct Pressure Surges at the Measuring Site If the display jumps badly, damping can be increased via the (optional) display and operating unit and the service and diagnostic software (i.e. by increasing the integration's time-con- stant);... -
Page 34: Service And Maintenance
6 seconds. If probe voltage is outside the permissible range, the warning ’Offset calibration to air invalid’ is indicated. • Read out probe voltage at LT2 either by – the display and operating unit (option) – the service and diagnostic software (option) –... - Page 35 Service and Maintenance NOTICE Do not forget! Perform a new offset-calibration in ambient air and enter the probe’s new temperature value after replacing the probe. Limit value 4 is set at the factory: An automatic check of the probe is possible at downtime and at pre-purge of the plant.
-
Page 36: Checking By Counter Measurement
Service and Maintenance 8.1.2 Checking by Counter Measurement Precise checking of the measurements is only possible through counter measurement with a second probe, or by comparing the measured values after probe replacement. NOTICE During counter measurement, check whether the instrument being used measures wet or dry. Those with an advance gas cooler are always used for dry measurement. -
Page 37: Checking The Lt2
(U Range: -30 mV … +300 mV. If the difference is less than 1 mV, the LT2 is operating correctly. If the difference exceeds 1 mV, repeat the above step with another digital voltmeter. -
Page 38: Faults/Warnings
(optional) display and operating unit, in menu [diag] • by Remote-display software (optional) • by LED row, LED 7 to 12, on LT2's processor board If several faults/warnings are present, they can be called up in sequence by activating the T2 multifunction key. Faults... -
Page 39: Warnings
Faults/Warnings Warnings Legend: LED is off flashes lights up Message by LED row, LED 7 to 12, LED 12 lights up. Warnings (LED ON) Warning No.: No warnings/faults active Internal resistance too high Offset voltage to air invalid Display of active warnings (red), Analogue input 1: input value too LED(s) permanently on. -
Page 40: Resetting Faults/Warnings
Limit values are displayed only if they are activated in parameters 930/940/950/960 (access level ’Service’). NOTICE Reset all warnings or faults by quitting them. If necessary eliminate the cause of the warning/ fault. See chapter 6.1.1 The LT2 Lambda Transmitter's Display and Operating Elements. -
Page 41: Faults - Causes And Solutions
The probe is heated with direct current at approx. 13 V, cyclically reversed. Therefore the use of a multimeter to measure it is somewhat difficult. NOTICE The current heating data can be read out from LT2 operating parameters 41/42/43. 9.3.1.3 Broken Wire Probe/Defective Probe This message is indicated if the AC internal resistance (R... -
Page 42: 9.3.1.4 No Probe Dynamics
Has the relationship between wet/dry measurement been taken into account? see chapter 11.5 Wet/Dry Measurement Deviations, Conversion Table • Check LT2 and probe, see chapter 8.2 Checking the LT2 • Commission the new probe as described in chapter 6 Commissioning/Decommissioning •... -
Page 43: Warnings - Causes And Solutions
– Fault in supply section electronics replace Check the Lambda Transmitter’s electronic: Measure the AC voltage across LT2 terminals 33 and 34, using a multimeter. The result in mV corresponds approx. to half the AC internal resistance. 9.4.2 Offset Voltage to Air Invalid The voltage determined during offset compensation is not permissible. -
Page 44: Spare Parts
1 Analogue output module 0/4 ... 20 mA; 0 ... 10 V 657R0050 1 Analogue output module0/4 ... 20 mA; 0 ... 10 V floating, Max. potential difference 20 V 657R0051 1 Analogue input module LT1/LT2 Potentiometer 1 ... 5 657P6000 1 Analogue input module 0/4 ... 20 mA 663P6001 1 Analogue input module 0/4 ... -
Page 45: Spare Parts Ls2-Ht Lambda Probe
Spare Parts 10.3 Spare Parts LS2-HT Lambda Probe Spare parts Type 1 Replacement probe average lifetime ca. 2 ... 5 years (depending on fuel) with PTFE-connecting cable, in 650R1515 housing, in connection with flue gas bypass tube for measuring temperature up to 1200 °C (2192 °F), 1 Replacement sensor, consists of sensor, seal for connecting head, filter discs and metal c-ring 650R1520 1 Mounting compound - Anti-seize-paste (5 pcs. -
Page 46: Appendix
Appendix Appendix 11.1 Technical Data LT2 Lambda Transmitter 11.1.1 Technical Data LT2 in Wall Mounting Housing LT2 in wall mounting housing Housing Housing in sheet steel, powder-coated Dimensions (HxWxD) 400x300x150 mm/15.75"x11.81"x5.91" in - without reference gas pump 500x300x200 mm/19.69"x11.81"x7.87" in - with reference... - Page 47 Appendix Analogue inputs Analogue inputs: 1 ... 4 via plug-in card on LT2 power pack electronic – Analogue input module potentiometer 1 ... 5 k type 657P6000 – Analogue input module 0/4 ... 20 mA type 663P6001 – Analogue input module 0/4 ... 20 mA with supply 24 VDC for transducer type 663P6002 –...
-
Page 48: Technical Data Ls2 Lambda Probe
Appendix 11.2 Technical Data LS2 Lambda Probe Fig. 11-1 Lambda Probe LS2 in housing with gas extraction device (GED) and probe installation fitting (PIF) Fig. 11-2 Lambda Probe LS2 in housing with gas extraction device (GED) and probe installation fitting (PIF) Probe in housing 650R1000... - Page 49 Appendix Characteristics Probe internal resistance R in air at 20°C (68 °F) 15 ... 30 and 17 W heat output Probe voltage in air 20° C (68 °F) and 17 W heat 0 ... -15 mV output (new probe) Heat output at room temperature 16 ...
-
Page 50: Technical Data Ls2-Ht Lambda Probe
Appendix 11.3 Technical Data LS2-HT Lambda Probe Fig. 11-3 Dimensional drawing Lambda Probe LS2-HT (high temperature) with flue gas bypass tube Lambda Probe LS2-HT high temperature type 650R1515 Connection head max. 100 °C (212 °F) Flange seal Novaphit type 656P0263 Flange seal graphite type 655P4211 Counter flange with tube socket KTL coated type 655R0179 or Counter flange with tube socket stainless steel 1.4571 type... - Page 51 Appendix Fig. 11-4 Flue gas bypass tube delay time as function of the velocity in the exhaust air channel depending on the varying lengths of the flue gas bypass tube The figure shows the delay time t [s] resulting from the length of the flue gas bypass EGDT tube L [mm] as a function of a flow velocity in the middle of the flue air channel v [m/s].
-
Page 52: Terminal Assignment Terminal Socket For Probe Ht
Appendix 11.3.1 Terminal Assignment terminal socket for Probe HT (-) Probe signal (grey) (+) Probe signal (black) without configuration Probe heating (white) Probe heating (white) Fig. 11-5 Terminal socket LS2-HT up to 6/2015 (+) Probe signal (black) without configuration Probe heating (white) Probe heating (white) not equipped (-) Signal (grey) -
Page 53: Electric Connections Device Side
LAMTEC SYSTEM BUS BR101: Selection of connection resistance: 1-2 off, 2-3 on. BR105: Position 2-3 The new processor card must also be set up for the LAMTEC SYSTEM BUS (BR12 and BR13 in position “C“). Digital inputs BR106, 107: Position 1-2: Digital inputs referenced to instrument potential. -
Page 54: Lt2 Power Electronic Type 657E1882
Appendix 11.4.4 LT2 Power Electronic Type 657E1882 Fig. 11-7 LT2 Power electronic type 657E1882 Transformer LT2 230/115 V change over BR 106, BR 107 Module 1-4 Analogue outputs Analogue outputs Plug connector for interface modules, Probe connection e.g. RS232 in combination with interface module... -
Page 55: Wet/Dry Measurement Deviations, Conversion Table
Wet/Dry Measurement Deviations, Conversion Table NOTICE The LT2 carries out measurements directly in the humid flue gases (wet measurement). When extractive devices are used, flue gases are removed and prepared. "Dry Measurements" are normally used here, since the humidity has been extracted from the flue gas. As a result, O measurement values vary (see diagrams below). -
Page 56: Declaration Of Conformity
Declaration of Conformity Declaration of Conformity... - Page 57 Declaration of Conformity...
- Page 58 The information in this publication is subject to technical changes. LAMTEC Meß- und Regeltechnik für Feuerungen GmbH & Co. KG Wiesenstraße 6 D-69190 Walldorf Telefon: +49 (0) 6227 6052-0 info@lamtec.de Telefax: +49 (0) 6227 6052-57 www.lamtec.de Printed in Germany | Copyright 2018...
Need help?
Do you have a question about the LT2 and is the answer not in the manual?
Questions and answers