Transcription of LTU 401 - Xylem US
1 ltu 401 TechnicalSpecificationTable of ContentsLTU 401 Submersible Level 2 Technical 2 Approvals and 2 Electrical 3 4 Part 5 Table of ContentsLTU 401 Technical Specification1 ltu 401 Submersible Level SensorProductThe Flygt Level Transmitting Unit, ltu 401 -sensoris used for measuring a liquid level. Theheart of ltu 401 is a ceramic thick-film sensor and the unit is specifically engineered towithstand the harsh environmental conditions typically encountered by Flygt pumps:sewage, slurry and viscous liquids. The output is a standard 4 20 mA direct current,proportional to the measured level.
2 The sensor is therefore well adapted to the prevalentcontrol systems on the market including, of course the Flygt controllers of the APP, FGCand Quick switch-on time - Suitable for use with battery operated controllers, such as FlygtATU 401. Low supply voltage - Suitable in a broad range of installations, including batteryoperation. Compact design - The sensor body fits inside a 1 inch pipe. Resistance to grime and deposits. Wearability and high resistance to chemicals (pH 4 12). Attractive & robust design - Including laser printed part nr Features Output 4 20 mA 2-wire system (max 25 mA) Response time 20 ms Switch-on time < 150 ms Calibration accuracy (20 C) < FS (linearity, hysteresis, repeatability) Supply 8 30 V DC Long term stability < % FS per year Insulation > 100 MW at 500 V DC Process medium temperature.
3 Nominal 5 40 C Storage temperature -25 80 C Membrane protection cap Membrane vent fitted on reference pipe Cable holder includedApprovals and StandardsCE conformityEMC directive 2004/108/CEIn accordance with EN 61000-6-2,EN 61000-6-3, EN 61326-1 ( )Pressure directive 97/23/CEProtection ratingIP 68 Vibration, mm (10-57 Hz),10 g (58 Hz 2 kHz)10 cycles within h per axisLTU 401 Submersible Level Sensor2 ltu 401 Technical SpecificationShock, IEC60068-2-2750 g/11 ms 100 g/6 ms10 x Imp. per axis and directionBump, IEC60068-2-29100 g/2 ms4000 x Imp.
4 Per axis and directionRandom, g2/Hz (20 Hz 1 KHz)30 min per axis (>10 g RMS)Electrical specificationSensor main supply, passive sensor8 - 30 V DC, two-wire systemLoad impedanceRW = (Usupply - 8 V) ACurrent output insulation resistance>100 MW at 500 V DCDimensionsSizeSensor body (with cap): 22 x 132 mmSensor body (without cap): 22 x 122 mmCable: kg + kg/m cableMaterialsSensor bodyStainless steel, AISI 316 LDiaphragmCeramic, Al2O3 (96%)CablePUR (Polyurethane rubber)O-ring sensor sealFKM "Viton" (Fluorocarbon rubber)Cable gland sealFKM "Viton" ltu 401 Submersible Level SensorLTU 401 Technical Specification3 Connection/InstallationConnection123AB(4 )Wiring1 Red+ 24 V DC2 Blue (out)4 - 20 mA ( supply)3 Wire (shield)P/E connection (ground)(4)White(Not connected)PartsAMembrane vent.
5 Prevents moisture from entering reference pipe - DO NOT REMOVE!BMembrane protection cap (stainless steel). Removing cap increases risk of damage to 401 Submersible Level Sensor4 ltu 401 Technical SpecificationInstallationCDThe sensor is mounted hanging from its cable (C). To prevent it from swinging violentlydue to turbulence and surge from pumps and tank inlets, it is recommended to hang itinside a PVC pipe (D).Part numbersLTU 401 sensor, complete w. cable and holderRange interval (m)Cable length (m)Part number0 - 77 230 - 77 240 - 77 250 - 77 260 - 77 27 Pressure rangesRange interval (m)Pressure range(bar)Overpressure/Burst pressure (bar)0.
6 / 40 - .. / 4 AccessoryPart numberJunction box, including surge arrestor83 95 05 ltu 401 Submersible Level SensorLTU 401 Technical Specification5 AccessoryPart numberCable holder83 21 74 ltu 401 Submersible Level Sensor6 ltu 401 Technical Specification Xylem | z l m|1) The tissue in plants that brings water upward from the roots2) A leading global water technology companyWe're 12,000 people unified in a common purpose: creatinginnovative solutions to meet our world's water needs. Developing newtechnologies that will improve the way water is used, conserved, andre-used in the future is central to our work.
7 We move, treat, analyze,and return water to the environment, and we help people use waterefficiently, in their homes, buildings, factories and farms. In more than150 countries, we have strong, long-standing relationships withcustomers who know us for our powerful combination of leadingproduct brands and applications expertise, backed by a legacy more information on how Xylem can help you, go to Water Solutions ABGes llv gen 33174 87 SundbybergSwedenTel. +46-8-475 60 00 Fax +46-8-475 69 00 our Web site for the latest version of this document andmore informationThe original instruction is in English.
8 All non-Englishinstructions are translations of the original instruction. 2011 Xylem
