LFT RADAR MICROONDE GUIDATE CONTROLLI DI LIVELLO LFT level sensor the all-round talent with TDR technology Latest technology: TDR sensor with coaxial probe for continual level measurements with analog and switching output, e.g., as alternative for capacitive sensors. Measurement principle The LFT uses the TDR technology (TDR = Time Domain Reflectometry) a process for determining run times of electromagnetic waves. A low-energy, electromagnetic impulse is generated in the electronics of the sensor, coupled into the coaxial probe and run in the inside of this probe. When this impulse reaches the fluid on the surface to be measured, part of the impulse is reflected there and runs along the probe back to the electronics, which then calculates the level from the time difference between the impulse sent out and the received on. The sensor can output this as continual measurement value (analog output) as well as derive a freely positionable switching point [S] from it (switching output). Area of use Innovative TDR technology enables inexpensive, reliable level measurements largely independent of applications. The LFT is suitable both for continual level measurements and for limitlevel detection in almost all fluids; changes in the properties of fluids to be measured do not influence it. It is the solution for precise and reliable measurements, especially in small tanks and containers independent of installation conditions. Typical applications are, for example, in: - Coolant lubricants - Oil - Other fuel types Dimensional drawing Measuring range 3...,99 TDR sensor Installation The sensor is installed vertically from above into the container or tub using its connection thread screw. For example, it can be screwed in directly into a weldin socket or a mounting bracket. Minimum bracket diameter and maximal bracket height do not apply here. Install the sensor, so that it does not touch other tank installations (e.g., feed pipes or other measurement equipment), the container wall or the container bottom (the use of the supplied gasket with a height of might be sufficient here). Minimum distances do not apply here. Select the installation spot, so that the sensor is not exposed directly to filling. The sensor should not be installed in a calm area of the container, in which sediment could settle over time (e.g., sanding dust). Continual rinsing of the sensor via moving fluid is recoended. Operation The sensor can be configured completely via the button. Visual feedback via the LEDs help here. You can make the following settings directly on the sensor: - Set and delete via Teach-in the switching point [S] for the switching output - Set the hysteresis for the switching outputs - Set the actual measurement range for the current output - Reset the sensor to the ex works state Please read the operating instructions for a detailed explanation of operation Approvals No special, application-related approvals are currently required for the sensor. Riels Instruments Srl +39 9 9677 +39 9 7736 www.riels.it info@riels.it
Connection type Pin Male connector -pin Wire colour cable terminal box Male connector -pin Wire colour cable terminal box 3 6 7 +UV (... 3 V DC) Analog output QA V Q brown (brn) white (wht) blue (blu) black (blk) don t connect Analog output QA +UV (... 3 V DC) Q3 Q Q Q V white (wht) brown (brn) green (grn) yellow (yel) gray (gra) pink (pnk) blue (blu) don t connect Technical data Electric data Output functions Analogue output Burden by Lower signal level Upper signal level Operating time Signal voltage HIGH Signal voltage LOW Output current IA Output load Capacitive load Inductive load Operating time Supply voltage Vs 3) Residual ripple Current consumption ) Protection class Initialization time Connection types Analog output Namur and/or switching output PNP ) < Ω 3..... ma.... ma ms VS V V V < ma nf H ms... 3 VDC VPP < 9 ma at VDC III < s Plug M, -pin Plug M, -pin Measurement performance ) Accuracy Reproducibility Resolution Hysteresis switching output Temperature drift Measuring range [M] Inactive area 6) Application conditions Dielectricity constant [er] 7) Conductivity 7) Temperature 9) Ambient temperature 9) Container pressure Separating layer (e.g., oil on water) ) ± 3 < < 3 or free adjustable. /K 3...,99 (at probe length, ) Each. ) No restrictions... + C Operation... +6 C Storage... + C bar rel. (during filling and emptying processes) > 7 Riels Instruments Srl +39 9 9677 +39 9 7736 www.riels.it info@riels.it
Mechanical data Enclosure rating screw Probe length [L] Material Housing Material Probe Material Seal/probe end ) Freely positionable in the complete measurement range ) short-circuit protected 3) Connections reverse-polarity protected ) Without load ) Reference condition: Dielectricity constant [e r ] = (water); with changed e r, measurement performance and the inactive range change. 6) At top and bottom plus tolerances of measurement accuracy 7) Fluid to be measured IP 67 ; 3/ NPT..., PBT 36 L /.. /.3 / PTFE ) Suitable for all oils, e.g., cutting, grinding and hydraulic oils, coolant lubricants, erosion dielectrics, cleaning and degreasing agents, all fluid lubricants, water and water-based fluids 9) We recoend using a distance sleeve with simultaneous max. medium temperature and max. ambient temperature (see accessories). ) The sensor does not detect an oil layer of < 7 on water, i.e., the sensor detects the water level. Starting from an oil layer of > 7, the complete level is detected, i.e., the level incl. the oil layer. code LFT Probe length in (value x ) LFT - Optional From To 3/ NPT Connection Mx, -pin (max. switching output possible) (min. switching outputs) Analog output Measurement value output (only with switching outputs) (NC) Normally open (NO) x NC and x NO (only for switching points) s/switching points (number), hysteresis locked, 3 s, hysteresis locked, 3 s, hysteresis locked, 3, hysteresis adjustable s, hysteresis adjustable A B A B C 6 Optional: Device type Customized factory settings W Customized factory settings ) Switching point hysteresis locked, (3 ) Position switching point [S] (-) Switching point, hysteresis adjustable Position of upper switching thresholds [S] (-) Position of lower switching thresholds [S] (-) Analog current output Upper value [ ma] Lower value [ ma] Order information You can obtain the sensor pre-configured for your requirements by selecting the appropriate options in the order code. Default setting: - Measurement range [M] has the maximum extension between the inactive areas at the top and bottom (each ). - The lower signal level of the analog output ( ma) is at the lower probe end, the upper signal level ( ma) at the upper probe end. ) The sealing surface of the screw-in thread of the probe is the reference point for customer-specific setting (see dimensional drawing) Riels Instruments Srl +39 9 9677 +39 9 7736 www.riels.it info@riels.it
Order information* Output: current output () and switching output/hysteresis: 3 Probe length LFT-AA LFT3-AA LFT-AA LFT-AA LFT6-AA LFT7-AA LFT-AA LFT9-AA LFT-AA LFT-AA LFT-AA LFT3-AA LFT-AA LFT-AA LFT6-AA LFT7-AA LFT-AA LFT9-AA LFT-AA 393 39 39 396 397 39 399 36 36 36 363 36 36 366 367 36 369 36 36 3 6 7 9 3 6 7 9 M x, -pin M x, -pin M x, -pin M x, -pin M x, -pin M x, -pin M x, -pin M x, -pin M x, -pin M x, -pin M x, -pin M x, -pin M x, -pin M x, -pin M x, -pin M x, -pin M x, -pin M x, -pin M x, -pin Output: switching output/hysteresis: 3 Probe length LFT-BA LFT3-BA LFT-BA LFT-BA LFT6-BA LFT7-BA LFT-BA LFT9-BA LFT-BA LFT-BA LFT-BA LFT3-BA LFT-BA LFT-BA LFT6-BA LFT7-BA LFT-BA LFT9-BA LFT-BA 36 363 36 36 366 367 36 369 36 36 36 363 36 36 366 367 36 369 363 3 6 7 9 3 6 7 9 Output: current output () and switching outputs/hysteresis: 3 Probe length LFT-BA LFT3-BA LFT-BA LFT-BA LFT6-BA LFT7-BA LFT-BA LFT9-BA LFT-BA 363 363 3633 363 363 3636 3637 363 3639 3 6 7 9 * Other models on request. Riels Instruments Srl +39 9 9677 +39 9 7736 www.riels.it info@riels.it
Output: current output () and switching outputs/hysteresis: 3 Probe length LFT-BA LFT-BA LFT3-BA LFT-BA LFT-BA LFT6-BA LFT7-BA LFT-BA LFT9-BA LFT-BA 36 36 36 363 36 36 366 367 36 369 3 6 7 9 Output s- normaly closed and normaly open/hysteresis: 3 Probe length NC / NO LFT-BC LFT3-BC LFT-BC LFT-BC LFT6-BC LFT7-BC LFT-BC LFT9-BC LFT-BC LFT-BC LFT-BC LFT3-BC LFT-BC LFT-BC LFT6-BC LFT7-BC LFT-BC LFT9-BC LFT-BC * Other models on request. Cables and connectors 39 3 6 7 9 3 screw system M, -pin, enclosure rating IP 67 3 6 7 9 3 6 7 9 Female connector M, -pin, straight Female connector M, -pin, angled x, sheath PVC x, sheath PVC / / / / / / / / / / / / / / / / / / / DOL--GM DOL--GM DOL--GM 699 696 6 m m m DOL--WM DOL--WM DOL--WM 69 6969 6 m m m ) Minimum bend radius in dynamic use R min = x cable diameter Riels Instruments Srl +39 9 9677 +39 9 7736 www.riels.it info@riels.it
Screw-in system M, -pin, enclosure rating IP 67 Female connector M, -pin, straight x, sheath PVC Female connector M, -pin, angled x, sheath PVC DOL--GM DOL--GM DOL--GM 6633 6993 6 m m m DOL--WMA DOL--WMA 699 633 m m Female connector M, - or -pin, straight x or x., sheath PUR halogenfree Female connector M, - or -pin, angled x or x., sheath PUR halogenfree DOL--GMC DOL--GMC DOL--GMC DOL--GMC DOL--GMC DOL--GMC 696 697 69 636 636 636 ) Minimum bend radius in dynamic use R min = x cable diameter Power supply,... V AC/ V DC,. A, IP Power supply 779 m m m m m m DOL--WMC DOL--WMC DOL--WMC DOL--WMC DOL--WMC DOL--WMC 699 69 69 6363 636 636 m m m m m m Welded flange Counter-nut Distance sleeve G 3/,. 6 3/'' NPT, PA 36 G 3/, stainless steel 3/'' NPT, stainless steel 733 66 G 3/, PA 36 Riels Instruments Srl +39 9 9677 +39 9 7736 www.riels.it info@riels.it