LT3-F measuring system
O₂ and COe measurement with KS1D probes for CO/H₂ trim control with LAMTEC burner controls
LAMTEC · LT3-F
- O₂ + COe
- KS1D ECO · KS1D-BF
LT3-F is a microprocessor-based version of the LAMTEC lambda transmitter that works with KS1D combination probes; unlike LT3 and LT2 it adds a monitoring processor, and its fail-safe electronics run on two microprocessors. The KS1D probe measures O₂ and oxidisable components such as CO/H₂ (COe) directly in the flue gas with a single sensor. Each LT3-F takes one probe only, and the types it accepts are KS1D ECO and KS1D-BF. The COe range is 0…1000 ppm, or 0…10 000 ppm on request.
LT3-F is intended solely for SIL2, type-approved CO/H₂ control with LAMTEC burner controls (BT300, ETAMATIC, FMS, VMS, CMS), where it is the measuring system for adaptive CO/H₂ combustion optimisation. CO/O₂ control, tested by TÜV Bavaria, holds SIL2 certification under DIN EN 61508 for natural gas and light fuel oil EL applications, and LT3-F and KS1D are SIL2-approved system components of CO/O₂ control. Fail-safety applies only to the complete system of LT3-F, KS1D and LAMTEC burner control, and the safety manual must be followed.
The transmitter always comes with a user interface on its front door, which shows O₂ and CO values, calibrates the measurement, reports probe and measurement status, and sets filter time, analogue output, probe replacement and maintenance mode. The powder-coated sheet steel housing is rated IP54, or IP65 with an additional cover; an IP65 housing in stainless steel 304L is also available. The unit operates at -20…+60 °C and is ready to measure roughly 10 minutes after switching on the mains; a probe put into service for the first time needs 60 minutes. On SIL-certified device variants, the permissible temperature at the KS1D ECO and KS1D-BF probe head is 300 °C.
LT3-F measuring system
- Direct O₂ and COe measurement in flue gas with a single KS1D sensor
- Extra monitoring processor compared with LT3 and LT2; fail-safe electronics with two microprocessors
- SIL2 to DIN EN 61508 and DIN EN 16340 approval as a component of CO/O₂ control in natural gas and light fuel oil EL applications
- Direct communication with LAMTEC burner control systems over LSB; PROFIBUS DP connection as an option
- Operation from a laptop and configuration backup with the LSB remote software
- Cost-effective, field-proven design that needs little maintenance
LT3-F measuring system
KS1D combination probe
Combination probe with a heated zirconium dioxide (ZrO₂) cell whose O₂, COe and reference electrodes let it measure O₂ together with oxidisable components such as CO/H₂ (COe). With LT3-F, KS1D ECO (up to 300 °C with GED ECO, IP42) and KS1D-BF (IP65; up to 550 °C with GED BASE, up to 1400 °C with GED FLEX depending on material) are used. COe accuracy is ±25 % of reading, not better than ±20 ppm.
Key specifications
| Specification | LT3-F |
|---|---|
| Measuring range | O₂: 0 … 21 % · COe (KS1D): 0 … 1000 ppm (0 … 10 000 ppm on request) |
| Measuring accuracy (O₂) | ±5 % (of reading, not better than ±0.3 vol.%) |
| Response time (t90) | O₂: < 9 s · COe: < 13 s |
| Supply voltage | 120 V AC -30 % … 230 V AC +10 %, 50–60 Hz |
| Interfaces | LSB · PROFIBUS DP (optional) |
| Degree of protection | IP54 · IP65 (with additional cover) |
| Ambient temperature | -20 … +60 °C |
| Safety integrity level | SIL2 (in CO/H₂ trim control with KS1D, for natural gas and light fuel oil EL) |
| Specification | KS1D ECO + GED ECO | KS1D-BF + GED BASE | KS1D-BF + GED FLEX |
|---|---|---|---|
| Max. flue gas temperature | ≤ 300 °C | ≤ 550 °C | ≤ 1400 °C (material-dependent) |
| Degree of protection | IP42 | IP65 | IP65 |
Approvals and standards
- CE declaration of conformity (2014/35/EU, 2014/30/EU, 2011/65/EU)
- EU type examination certificate — DIN EN 16340 (with KS1D; natural gas and light fuel oil EL applications)
- DIN EN 60730-1
- DIN EN 13611
- SIL2 — DIN EN 61508 (complete system with KS1D and LAMTEC burner control only; natural gas and light fuel oil EL)
Accessories
- Analogue output LSB module: 4 × 0/4…20 mA in the current version or 4 × 0/2…10 V DC in the voltage version; for the O₂ and COe readings
- Digital LSB module with 4 outputs for fault, warning and limit value messages
- Digital LSB module with 4 inputs (8 with two modules linked by a jumper plug): fault reset, offset calibration, switching to a fuel's COe curve
- PROFIBUS DP module (PBM100): mounted directly on LT3-F or externally, for example in the control cabinet; remote diagnosis via the fault history
- Efficiency calculation module: 2 Pt100 inputs (flue gas and ambient temperature), 2 × 0/4…20 mA outputs (flue gas temperature, efficiency); 24 V DC / 50 mA
- LSB remote software (657R9000) with USB/CAN module and 4 m cable: operation from a laptop, configuration and parameter backup
More products in this group
LT1 measuring system
Modular system with the LS1 probe for O₂ measurement in flue gas; automatic calibration with ambient air and SIL1
- O₂ 0 … 21 %
- SIL1
- LS1 HT: ≤ 1400 °C
LT2 measuring system
Versatile, modular system for O₂ and CO/H₂ measurement in flue gas with LS2 and KS1D probes
- O₂ + COe
- LS2/KS1D: ECO · BF · KAF · Ex
- SIL1 (KS1D, special configuration)
LT3 measuring system
Compact, robust measurement of O₂ and CO/H₂ in flue gas
- O₂ + COe
- SIL1 / SIL2
LT3-Ex explosion-protected measuring system
O₂ and COe measurement in flue gas for Ex zones 1 and 2 with LS2-Ex and KS1D-Ex probes
- O₂ + COe
- Ex zones 1 and 2
- SIL1 · SIL2 (2 × LT3-Ex)
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