FMU231E-AA32 ultrasonic level meter 
 Applications 
 Prosonic T for the liquid and particulate material level of non-contact continuous level measurement of the integrated instrument. There are two different measuring range of the transmitter available. 
 ? FMU 230 
 Solid Range: 2m 
 Liquid measuring range: 4m 
 ? FMU231E-AA32 
 Solid measurement range: 3.5m 
 Liquid measuring range: 7m 
 Two transmitters are equipped with integrated temperature sensors for measuring principle of compensation for travel time. 
 Features and benefits 
 ? Threaded connection G1? ", 1? NPT" or G2 ", 2" NPT 
 ? Rotating shell 
 ? With optional on-site displays, buttons, simple operation 
 ? LED light display to quickly monitor the operational status 
 ? Two-wire power supply 
 Operation 
 Through the four keys on the panel -, +, V, H, can set parameters, display, and access to Endress + Hauser matrix operations and other functions: 
 ? Of three fixed target echo suppression automatically 
 ? Linear correction (11 points) 
 ? Zero and full scale calibration 
 ? An echo detection (second echo) 
 ? Automatic suppression of interference echoes 
 ? Parameter lock 
 The main technical parameters FMU231E-AA32 
 ? Blind spot: FMU230 0.25M FMU231 0.4M 
 ? Vibration frequency: FMU230 70HZ FMU231 35HZ 
 ? Acoustic divergence angle: а <5.5 ° 
 ? Protection class: IP67 
 ? Measurement error: the maximum measured value of 0.2 5% 
 ? Resolution: 3MM 
 ? Medium temperature: -40 ... +80 ° C (containing the temperature sensor) 
 ? Working pressure: Threaded 3bar 
 FMU231E-AA32 installation instructions 
 ? Install the probe, should ensure the highest Level in the blind spot below the probe end should be inserted into the tank. (Plus installation of pipe exception) 
 ? Note installation angle of the probe should be vertical with the object surface to avoid feeding sector 
 ? Not be installed in a tank two ProsonicT 
 ? Can not be installed in the tank center of the probe 
 Packing factory original packaging 
 Model FMU230E-AA32, FMU231E-AA32 
 Measuring range 0-4m; 0-7m 
 0.25% accuracy 
 4-20mA output signal wire 
 Power and Power 24VDC 0.8W 

 FMU231E-AA32 advantages: 
 ■ Non-contact measurement, has little to do with the material properties 
 ■ integrated temperature sensor transmission time correction, even when the temperature changes, measurement is still accurate 
 ■ measured in any linear function of unit output 
 ■ display with optional 
 ■ through the G1? ", G2", NPT 1? "Or NPT 2" screws simple fixed 
 ■ Two-wire meters, Level 4-20 mA output current is displayed by the 
 ■ rotating shell 
 ■ with optional on-site displays, buttons, simple operation 
 ■ LED light display to quickly monitor the operational status 
 ■ Two-wire power supply 

 FMU231E-AA32 functional and system design 

 Transit time method 
 E: empty distance; 
 F: full scale (full pot distance); 
 D: the distance from the sensor to the material surface; 
 L: Level; 
 BD: Dead from 
 Prosonic T direction of the sensor to the surface of the product issued by the ultrasonic pulse is reflected back in the product surface, received by the sensor. Prosonic T transmit and receive pulses measured the time between t, instrument and sound velocity c t calculated using the sensor diaphragm 
 The distance between the product surface. 
 D = c? T / 2 
 Empty with a known user input calculated from the E Level as follows: 
 L = E - D 
 Integrated temperature sensor compensates for temperature changes caused by the speed of sound. 
 Signal assignment 
 ■ automatic suppression of interference echoes up to 3 
 ■ detection of the first echo 

 Calibration by entering the empty distance E (zero) and full cans from the F (range) calibration 
 E and F is equivalent to: 
 ■ 4 mA current output, respectively, or 20 mA 
 ■ site shows 0% or 100% 

 F can not be inserted into dead zone range from BD, the transient characteristics of the sensor will lead to measurement error, so the dead from the reflected echoes can not be assigned Level. 
 Live display of the instrument, E and F directly to digital input. No display of instruments, plus a row of container E and F points is expected to complete the calibration. 
 Prosonic T linear function of the linearity of the measured value is converted to arbitrary units of length or volume values, linearization table composed of up to 11 pairs of numbers can be entered manually or semi-automatic (in the feeding vessel under controlled conditions). . 

 FMU231E-AA32 input 
 Measured variables measuring sensor diaphragm and the material surface distance D 
 Linear features, instrumentation with the D calculation: 
 ■ Level of any units of L 
 ■ The volume V of any units 

 Maximum measuring range: from the dead 
 Instrument from the dead (BD) 
 FMU 230 0,25 m 
 FMU 231 0,4 m 
 Measure the distance limit specified by the dead (p. 2). Transient characteristics of the sensor, can not be calculated from the dead echo the value of the material level. 
 Lower limit: the sensor range 
 Measurement range determined by the sensor range, sensor range of the working conditions of the run-time decision. The actual range is estimated as follows (see also figure in the calculation examples): 

 1. To determine the impact of the measurement process 
 2. Together with the corresponding attenuation values 
 3. Based on the total attenuation, calculated using the chart range 

 Fluid surface decay 
 Still 0 dB 
 Wave 5 ... 10 dB 
 Strong turbulence 10 ... 20 dB 
 Foam query E + H 
 Solid surface decay 
 Coarse (such as crushed stone) 40 dB 
 Software (such as Cement coal, slag dust cover) 40 ... 60 dB 
 Dust attenuation 
 The formation of dust is not 0 dB 
 5 dB small amount of dust formation 
 Severe dust formation 5 ... 20 dB 
 Detection of materials within the block fading 
 No 0 dB 
 Small amount of 5 ... 10 dB 
 A large number of 10 ... 40 dB 
 Temperature sensor and material surface decay 
 to 20 ° C 0 dB 
 to 40 ° C 5 ... 10 dB 
 to 80 ° C 10 ... 20 dB 


 FMU231E-AA32 output 
 Output signal 4 ... 20mA analog signal 
 Alarm signal can be configured as: 
 3,8 mA 
 22mA 
 Finally, the value of maintaining 
 Output damping 0 ... 255s 

 FMU231E-AA32 Features 
 Reference to working conditions in the following reference conditions, the specified performance characteristics and effective: 

 ■ temperature = +20 ° C 
 ■ Pressure = 1013 mbar abs. 
 ■ humidity = 60% 
 ■ ideal reflective surface (such as calm, flat liquid surface) 
 ■ No interference reflections within signal beam 

 Measurement resolution of 3 mm 
 Measurement error of maximum measuring range 0,25% (including linearity, repeatability and hysteresis) 
 0,5 ... 1 Hz pulse frequency 
 Reaction time of about 5 s 

 FMU231E-AA32 process conditions 
 Process temperature -40 ° C ... +80 ° C 
 Process