LAR-361, LAR-761
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SENSORS FOR FOOD AND BIOPHARMA. Application / Specified usage Climatic Independent Level Sensor LAR · Hydrostatic level measurement in humid ambiance · Special applicable for exterior storage vessels TYPE EL · Level measurement with LAR, linearization and evaluation with PEM-DD (6 standard geometries, 1 geometry programmable; see separate product information) · Difference pressure measurement with 2 x LAR and evaluation device PEM-DD Hygienic design / Process connection · By using the Negele weld-in sleeve EMZ-352 or the build-in system EHG-.../1" a front-flush, hygienic and easy cleanable measurement point will be achieved. · EHEDG certificate for hygienic process connection CLEANadapt (LAR-361) · Conforming to 3-A Sanitary Standard for versions with Tri-Clamp DIRECTadapt (LAR-761) · CIP-/ SIP-cleaning up to 140 °C (284 °F) / max. 30 min · Front-flush stainless steel sensor cell · All wetted materials are FDA-conform · Sensor completely made of stainless steel · Protection class IP 69 K (with cable connection) · Available process connections (adapter): Tri-Clamp, SMS, DRD, Varivent, BioControl Features / Advantages · Measurement cell without any contact to atmosphere, fully closed measurement system · No drift problems caused by condensation · Very high accuracy and long term stability · Measurement up to 130 °C (265 °F) medium temperature · Oil filling, FDA approved · Factory or field calibration · Integrated two-wire measurement trancducer 4...20 mA · 3 years warranty Options / Accessories · · · · Material certificate 3.1 Special pressure ranges, specific pressure calibration ex works Electrical connection with M12 plug-in connector Preassembled cable for M12 plug-in connector Measuring principle hydrostatic pressure + atmospherical pressure temperature sensor 1 hydraulic coupling piezoelectrictransducer Measuring principle The pressure sensor utilizes an internal piezoelectric transducer to convert the mechanical pressure into a corresponding mV signal. The mV signal then passes through custom linearization and conditioning circuitry. The resulting signal is an industry standard 4...20 mA, according to the specified range. In addition, onboard circuitry handles temperature compensation to ensure a stable reading during all phases of operation. hydraulic coupling temperature sens

Specification Specification

Mechanical connection / Installation ■ Pay attention to the maximum tightening torque of 20 Nm if using Negele CLEANadapt system! ■ Pay attention to remain open the 4 ports of atmospheric vent location.

Electrical Connection | InstallationElectrical connection With Ml2-plug Configuration Ml2-plug 1: supply +24 V DC 2: output 4...20 mA 3: not connected 4: not connected Start up ■ Connect the sensor with power supply (12...36VDC) -> see "electrical connection LAR". ■ The sensor is now ready for use. ■ At standard factory-setting 0...100 % of the full range are equivalent to 4...20 mA of the current output. Example: LAR-xxx/1 = 0...1 bar -> 0 bar = 4 mA; 1 bar = 20 mA ■ In case of specific factory calibration the customized measurement range is equal to 4...20 mA of the current...

Installation 2. Utilizing on-board setup If "wet calibration" (by vessel filling) is not possible, full adjustment can be done by on-board setup. First of all, the desired range (full value) must be calculated to a corresponding current value. Afterwards, the calculated current will be adjusted by multimeter to perform new calibration. In the following, a current calibration procedure is described as an example. 2.1 Calculating the current to adjust For calculating the current to adjust the "upper linearization value" is needed (see table calibration values). This linearization value is...

Warnings | Application Examples FOOD Hydrostatic Level Measurement and Linaerization with LAR and PEM-DD Difference Pressure Measurement and Linearization with 2 x LAR and PEM-DD Phydrostatic + Po Pdifference = (Phydrostatic + Po) - Po Pdifference = Phydrostatic Advice for differential pressure measurement in pressurized vessels Po < 4 x Phydrostatic To guarantee a stable differential pressure measurement in pressurized vessels the overpressure must not be higher than 4 times of the hydrostatic pressure! · Cleaning with fluids does not effect operation · Metal diaphragm (process and...

Troubleshooting | Process Connections Troubleshooting Symptom Action Conditions for a measuring point according to 3-A Sanitary Standard 74-06 ■ The sensors LAR-761 / TC conforming to the 3-A Sanitary Standard. ■ The sensors are designed for CIP-/ SIP-cleaning. Maximum 140 °C / 30 minutes. ■ Only with 3-A conforming Tri-Clamp connection. ■ Mounting position, self draining and the position of the leackage hole must be in accordance to current 3-A Sanitary Standard. Overview of possible process connections for LAR-361. The complete overview of all available adapters you will find at...

Product Information LAR-361 | LAR-761 Order Code LAR-361 (Climatic independent level sensor, process connection CLEANadapt G1") LAR-761 (Climatic independent level sensor, process connection DIRECTadapt) Measuring range (relative) 0 (0...0.35 bar) Process connection (only for LAR-761) TC1 (Tri-Clamp 1W, incl. 3-A TPV verification acc. to standard 74-06) TC2 (Tri-Clamp 2", incl. 3-A TPV verification acc. to standard 74-06) D40 (Dairy Flange DIN 11851 DN40) SM3 (SMS 38 mm with union nut) EHL (Endress+Hauser universal adapter Uni 65 6" D85) EHS (Endress+Hauser universal...