Operating instructions Electronic level sensor LR3300 704805
Contents
1. gt Apply operating voltage gt Initial display is shown gt Press Mode Enter briefly gt LEnG is displayed 3 gt Press SET and keep it pressed E bit 717 gt nonE flashes for 5 s Sane rat gt After 5 s The initial value is BEBE ric y displayed and changed incremen tally by pressing the button once or continuously by keeping the button pressed The value is incremented continuously For reducing the value let the display move to the maximum setting value Then the cycle starts again at the minimum setting value Note on delivery the values are displayed in inch gt Press Mode Enter briefly gt LEnG is displayed again The new setting value is stored Then the unit changes to the operating mode For further parameter setting the menu can be opened 9 3 You can open LEnG directly like any other parameter It is therefore possible to change the value for the probe length at any time 21 9 3 Basic settings 9 3 1 Selection of the display unit gt Select Uni and set the unit of measurement cm inch Factory setting inch 9 3 2 Offset setting the switching limits shift by the value of the set offset gt Select OFS and enter the distance between bottom of the tank and lower edge of the probe Afterwards display and switch points refer to the real level Factory setting OFS 0 Note Set OFS before setting the switching limits SP1 rP1 Otherwis2. upper value rP1 lower value L level HY hysteresis FE window For the switching output a switch off delay of max 5 s can be set e g for especially long pump cycles Offset for indicating the real level in the tank The zone between tank bottom and lower edge of the probe can be entered as offset value OFS So display and switch point refer to the actual level Probes for different tank heights The unit can be installed in tanks of different sizes Probes in different lengths are available To adapt to the tank height each probe can be shortened The minimum probe length is 15 cm the maximum probe length 160 cm e Probe and housing can be rotated without restriction This enables easy instal lation and orientation of the head of the unit after installation Safe state n case of a fault a safe state can be defined for each output e Ifa fault is detected or if the signal quality is below a minimum value the out puts pass into the safe state For this case the response of the outputs can be set via the parameters FOU1 FOU2 Temporary loss of signal caused e g by turbulence or foam formation can be suppressed by a delay time 9 4 6 dFo During the delay time the last measured value is frozen If the measured signal is received again in sufficient strength within the delay time the unit continues to work in normal operation If however it is not received again in sufficient strength with
3. Probe or process connection soiled a nection carry out a reset Installation conditions were not Follow the instructions in chapter 5 adhered to Installation Block distance exceeded by more than Lower the level follow the instructions 10 mm in chapter 5 installation Atypical abrupt level changes Carry out a reset ISCx Flashing short circuit in switching Seinaucuhecho circuit SC Flashing short circuit in all switching Remove he shot arcuk The unit carries out plausibility checks to increase the operational reliability Atypical level changes can be caused e g by contact with the probe They can also be caused by strong soiling or turbulence With the parameter dFo the response of the unit can be delayed 9 4 6 Carry out a reset power off and on again after rectifying the fault and to reset the error message 10 4 Output response in different operating states OUT1 OUT2 niialisation according to the level and according to the level and OU1 setting OU2 setting Normal operation Error Err0 Err OFF for FOU1 OFF 4 mA 0 V for FOU2 OFF ON for FOU1 on 20 mA 10 V for FOU2 on 25 11 Scale drawing Toate 5 0 Alacivezone 10 L 5 ooo i cea zone a 2 inacivezone2 m 26 12 Technical data Operating voltage V Current rating mA Short circuit protection pulsed reverse polarity overload protection Voltage drop V Current consumption
4. a fault Analogue output goes to 4 mA 0 V in case of a fault Factory setting FOU1 and FOU2 OFF Faults faulty hardware too low a signal quality untypical level curve Overflow is not considered to be a fault 9 4 6 Setting of the delay time after signal loss gt Select dFo and set the value between 1 and 5 s At 0 factory setting the delay time is not active Mind the dynamics of your application In case of fast level changes it is recommended to adapt the value step by step 9 5 2 Reset of all parameters to factory setting gt Select rES then press Set and keep it pressed until is dis played gt Press Mode Enter briefly gt During the storage operation WAIT is displayed for several seconds Then the unit restarts and the factory settings are restored Note On delivery the unit is not operational You first must enter the value for the probe length 9 2 9 6 Entering of the probe length after changing the probe length Required after a factory reset rES or in case of subsequent changes of the probe length gt Measure the probe length L to a precision of 2 mm 0 1 inch L lower edge of the process connection to the probe end gt Round up the measured value step increment 0 5 cm 0 2 inch gt Select LEnG and set the value between 15 0 and 160 0 cm 6 0 und 63 0 inch Note After changing the probe length the values for OFS and the switch ing limits
5. current or voltage output 4 20 mA U 0 10 V Offset value for level measurement Extended functions opening of menu level 2 Response of OUTx in case of a fault 9 Parameter setting During parameter setting the unit remains in the operating mode It continues its monitoring function with the existing parameters until the parameter setting has been completed 9 1 General parameter setting 3 steps must be taken for each parameter setting Selection of the parameter gt Press Mode Enter until the re ZUW quested parameter is displayed SERA gt Setting of the parameter value gt Press Set and keep it pressed BRE gt Current setting value of the param Modetter Set gt IGG eter flashes for 5 s OG gt After 5 s Setting value is changed incrementally by pressing the button once or continuously by keeping the button pressed Numerical values are incremented continuously For reducing the value let the dis play move to the maximum setting value Then the cycle starts again at the minimum setting value 3 Acknowledgement of the parameter value DnH b Press Mode Enter briefly Mente Se Sat D gt The parameter is displayed again The new setting value is stored Setting of other parameters gt Start again with step 1 Finishing the parameter setting gt Press Mode Enter several times until the current measured value is displayed or wait for 15 s The unit returns to the operatin
6. mA Analogue output 4 20 mA max 500 Q 0 10 V min 2000 Q Zero sional MAJ Wesa EEEE GAGA 3 6 4 0 0 0 0 2 Full signal mA V 20 0 20 8 10 0 10 3 Resolution mm 0 5 0 2 A Measuring sensitivity mA V per mm 16 mA A 10V A ORELENOFJOM asa OR AO A Z A RR AG Z A o dat 1 0 Characteristics deviation CM ccccscsccsescscscssssessssscscsesesecssescsssseesesseesssseeeeesaees 1 0 Swiich point accuracy CIM imminent 1 5 0 590 A BS ett INN CIC ho Go EA AA EU5 Max speed of the level change mm s Dielectric constant medium Max tank pressure bar Housing materials stainless steel 304815 FKM NBR PBT PC PEI TPE V PTFE Materials wetted parts Stainless steel 303822 PTFE NBR Protection Operating temperature C asesor a 0 60 Medium temperature C ccecccssscscsesscscsssssssssesesssseessesssesecsssesessssecesessesesasseeess 0 80 Storage temperature C Shock resistance g 12 DIN EN 60068 2 29 11 ms Vibration resistance g kaca 2 5 RMS 1 1000 Hz IEC60947 1 A active zone Scale drawing active zone A up to 250 mm 2 active zone A 250 1550 mm 27 12 1 Setting ranges LEnG Setting range 15 160 Step increment OFS Setting range 0 100 0 39 4 Step increment The setting ranges for the set point SP1 and reset point rP1 depend on the probe length L In general the following applies O O
7. must also be re entered 23 10 Operation After power on the unit is in the Run mode normal operating mode It carries out its measurement and evaluation functions and generates output signals ac cording to the set parameters 10 1 Operation indication ll Level below the active zone FULL numerical value Level has reached or exceeded the maximum measuring alternately range warning overflow CAL Initialisation phase after power on On delivery the unit is not operational Entering of the probe length is required 9 2 Loc Unit electronically locked parameter setting impossible For unlocking press the two setting buttons for 10 s Unit is unlocked parameter setting is possible again WANT Factory reset takes place LED 3 LED 7 not used 10 2 Reading of the set parameters gt Press Mode Enter briefly to scroll the parameters gt Press Set briefly to indicate the corresponding parameter value for about 15 s After another 15 s the unit returns to the Run mode 24 10 3 Error indication ErrO Fault in the electronics Replace the unit Err1 Measurement disturbed by foam forma Install the unit in a still pipe or bypass tion or strong turbulence Set or increment dFo 9 4 6 Measurement disturbed by separation Remove the oil layer by suction stir the layers e g oil layer on water medium verify the composition Clean the probe and the process con
8. surfaces media which are very inhomogeneous separate from each other thus forming separation layers e g oil layer on water Check the function by an application test In case of signal loss the unit displays Err1 and switches the outputs to a defined state 9 4 5 The unit is not suitable for applications where the probe is subjected to per manent and high mechanical stress e g strongly moving viscous media or strongly flowing media 4 Function 4 1 Measuring principle The unit operates to the principle of guided wave radar It measures the level using electromagnetic pulses in the nanosecond range The pulses are transmitted by the sen sor head and guided along the probe fig 1 When they hit the medium to be detected they are reflected and guided back to the sensor fig 2 The time between transmitting and receiv ing the pulse directly relates to the travelled distance D and the current level The reference for distance measurement is the lower edge of the process connec tion 4 2 Features of the unit Easy set up When operating voltage is applied to the unit for the first time the probe length must be entered Afterwards the unit is in principle operational 9 2 Entering of the probe length unit on delivery e f necessary parameters for the output signals and optimisation of the monitor ing functions can be set 9 4 e All settings can also be carried out before inst
9. unit on delivery susssaaaanassaaa 21 9 3 Basie SENGS waski AAAA EEEE AERO RAR ANA pc 22 94 Setting Ol output Signals sstcnrecawextamirnistadvenietinntenteusinndenateetenicmetaeceniends 22 9 5 2 Reset of all parameters to factory setting ssssaaaaaaaaascaa 23 9 6 Entering of the probe length after changing the probe length 23 UO OPETANOM A AO ARE R L ARE GE 24 10 1 Operation indication ae o OG G GRE OG GEO WEAR 24 10 2 Reading of the set parameters aaaa aaa aaa aaa aaa aaa iaia 24 MOS jie MONG AOU WP EA 25 10 4 Output response in different operating States 25 UE SCIC CM dO E AAA A 26 12 WC ali ez NC LE PAROWE OC 27 12 LSPRNGTANGEE oss EO EE Ef AE AEGEE E 28 To MC CC a Sas A AA OO GEE GOA SE 28 AE CIONS CI NA ET 29 Preliminary note Operating elements are indicated in these instructions as follows Mode Enter Mode Enter button Displays are indicated as follows OU1 parameter OUT Hno parameter value Hno An instruction is indicated by gt Example Check whether the unit operates correctly A reaction to the action is indicated by gt Example gt LED 8 lights 1 Safety instructions The unit must be connected by a qualified electrician The national and international regulations for the installation of electrical equip ment must be adhered to The unit complies with the standa
10. 14 5 5 Installation of the unit using a flange plate The following flange plate is available as accessories Flange plate 73 90 84 NPT u ccccccscsssessssescsessscseseeececscssseseseeesscscsesees order no E43206 gt Arrange for a bore hole in the tank lid It must have a minimum diameter d to enable sufficient transfer of the measured signal to the probe The diameter depends on the wall thickness of the tank lid Wall thickness mm 8 11 Bore hole diameter mm gt Install the flange plate with the flat surface showing to the tank and fix it with appropriate screws A seal A can be placed between the flange plate and the tank gt Ensure cleanness and evenness of the sealing areas especially if the tank is under pressure Tighten the fixing screws sufficiently gt If necessary appropriate sealing material e g Teflon tape can be applied to the thread of the sensor gt Screw the unit in the flange plate and tighten firmly After installation the sensor housing can be aligned It can be rotated without restriction Even if rotated several times there is no risk of damage to the unit 6 Electrical connection The unit must be connected by a qualified electrician The national and international regulations for the installation of electrical equipment must be adhered to Voltage supply to EN 50178 SELV PELV For the scope of validity cULus The device shall be supplied from an isolating transformer havin
11. 15 L 16 Step increment The values apply if OFS 0 e P1 is always smaller than SP1 If the value for SP1 is reduced to a value lt rP1 the posi tion of rP1 also shifts e If rP1 and SP1 are close together about 3 x step increment rP1 is changed automatically when increasing SP1 If there is a greater difference between rP1 and SP1 rP1 maintains the set value even if SP1 is increased 13 Maintenance b Keep the process connection free of deposits and foreign bodies gt In case of strong pollution clean the process connection and the probe at regular intervals In case of longer operation separation layers can form in the medium e g oil on water This applies especially to still pipes or bypasses gt Remove separation layers at regular intervals 28 14 Factory setting Factory setting 100 SPmax 100 rPmax SPmax LEnG value in inch minus 1 6 rPmax LEnG value in inch minus 1 8 When the LEnG value is entered the program calculates the basic setting Further information at www ifm com 29
12. CE 05 2010 704805 00 ifm electronic Operating instructions Electronic level sensor efectoriso LR3300 Contents Toalety IS UC OD nasi ARA EO E EEE EEE A 3 2 RSIS SUD 8 4 3 Functions and features ua ao OE OE Atea 4 I CAN OND Ied ei OOO EEC AP AEON e OEO Ao 4 3 2 Restriction of the application area eesaaaa aaa aaa aaa aaaaaaaazaaza aa aa 5 dE OE OM RER 5 4 1 Measuring principle PZ OCE 5 4 2 Features of the UNII orc wawa wi EEE WEAR ESEE AE GA Ada 6 MNS VAM AU OWN ERC ZE PON 9 5 1 Installation location environment cccccseecceceeeceeeseeeeeceeeeeeseaeeeees 9 5 2 Installation of the probe u eee aaa aa aaa aaa aaa aaa aaa aaaaaaaaaaaaaaaaaaakaa ia 12 5 3 Sh0reniig OF the probe eko Ao Abb 12 5 4 Installation of the unit in A TANK waza cat EE ARE O REA 13 5 5 Installation of the unit using a flange plate sssssaaaaasasaaa 15 6 Electrical cometo serseri nias narei anaa a Eaa 16 7 Operating and display eCleMent ccccccssssseeeecceeeseeeeeeseaesseeeeessaneaees 17 VM T tsar ets emoci essen eee este ae otek eee c ena teas atelectasis EA ae 18 UPS MIC E ias aE USEE ADDERE ERACE RARE 18 8 2 Explanation of the MOM aaa wia WA A EO AEO ECOLE 18 9 Parameter seling innnvsaienisiimiiitamanatantanieriniemalsainvanunidmiapeaiGbantenaiiniantensies 19 9 1 General parameter Setin ao aa ao O AA AAAA 19 9 2 Entering of the probe length
13. allation of the unit e Reset to the factory settings is possible Electronic lock can be set to prevent unintentional operations Display functions The unit displays the current level selectable in cm or inch Factory setting for inch The set unit of measurement and the switching status for OUT1 are indicated by LEDs Analogue function The unit provides an analogue signal proportional to level The analogue output OUT2 can be set as current or voltage output e Current output analogue 4 20 mA OU2 I e Voltage output analogue 0 10 V OU2 U Curve of the analogue signal L level A active zone gt 11 Scale drawing S1 zero signal 4 mA 0 V S2 full signal 20 mA 10 V Note the tolerances and accuracy limits during the evaluation of the analogue signal 12 Technical data data sheet Switching functions The unit signals via the switching output OUT1 that a set limit value has been reached or that the level is below the limit value SP1 rP1 The following switching functions can be selected e Hysteresis function normally open OU1 Hno e Hysteresis function normally closed OU1 Hnc First the set point SP1 is set then the reset point rP1 at the requested level Window function normally open OU1 Fno Window function normally closed OU1 Fnc The width of the window can be set by means of the difference between SP1 and rP1 SP1
14. e 9 4 Setting of output signals 9 4 1 Setting of the switching limits for OUT1 gt Select SP1 and set the measured value at which the output switches gt Select rP1 and set the measured value at which the output switches back rP1 is always smaller than SP1 The unit only accepts values which are lower than SP1 9 4 2 Setting of the output function for OUT1 switching output gt Select OU1 and set the switching function Hno hysteresis function NO Hnc hysteresis function NC Fno window function NO Fnc window function NC Note If the switch point is used as an overflow protection the setting OU1 Hnc NC function is recommended The principle of normally closed operation ensures that wire break is also detected 9 4 3 Setting of the output function for OUT2 analogue output gt Select OU2 and set the output function I current output 4 20 mA U voltage output 0 10 V 22 9 4 4 Setting of the switch off delay for OUT1 gt Select dr1 and set the value between 0 2 and 5 0 s At 0 0 factory setting the delay is not active The switch off delay is only active if hysteresis has been set as switching function OU1 Hno or Hne 9 4 5 Response of the outputs in case of a fault gt Select FOU1 FOU2 and set the value on output switches ON in case of a fault Analogue output goes to 20 mA 10 V in case of a fault OFF switching output switches OFF in case of
15. g a secondary Listed fuse rated as noted in the following table Overcurrent protection Control circuit wire size Maximum protective device rating AWG Ampere 1 gt Disconnect power b Connect the unit as follows Pin connection Lr 2 OUT2 analogue output 4 OUT1 switching output Note When operating voltage is applied to the unit for the first time the probe length must be entered Afterwards the unit is in principle operational 9 2 Entering of the probe length unit on delivery 16 7 Operating and display elements 00909090000 1 to 8 Indicator LEDs LED 1 green indication of the level in cm LED 2 green indication of the level in inch LED 3 LED 7 not used LED 8 yellow output 1 is switched 9 alphanumeric display 4 digits Indication of the current level Operation and fault indication Indication of the parameters and parameter values 10 Set button Setting of the parameter values continuously by keeping the button pressed incremen tally by pressing the button once 11 Mode Enter button Selection of the parameters and acknowledgement of the parameter values 17 8 Menu 8 1 Menu structure 8 2 Explanation of the menu SP1 rP1 Upper lower limit level values OU1 Output function for switching output OUT1 hysteresis function or window function normally closed or normally open OU2 Output function for analogue output OUT2
16. g mode if no button is pressed for 15 s after acknowledgement of the new parameter value 19 Change from menu level 1 to menu level 2 b Press Mode Enter until EF is displayed BBB ModeEnter Set DO gt Press Set briefly gt The first parameter of the sub menu is displayed here dr1 e Locking unlocking The unit can be locked electronically to prevent unintentional settings gt Make sure that the unit is in the normal operating mode Vora Coc le gt Press Mode Enter Set for 10 s Nora ES gt Loc is displayed lt i 105 7 During operation gt Loc is briefly displayed if you try to change parameter values For unlocking gt Press Mode Enter Set for 10 s BBB D gt uLoc is displayed a a os On delivery unlocked Timeout If no button is pressed for 15 s during parameter setting the unit returns to the operat ing mode with unchanged values 20 9 2 Entering of the probe length unit on delivery On delivery of the unit you must first enter the probe length The complete param eter setting menu cannot be accessed before this gt Ensure that the correct probe length is entered In particular it has to be considered Is the measurement of the probe length correct lower edge of the process connection to the probe end chapter 5 3 Does the unit of the eae cm ge correspond to the unit of measurement set in the sensor 9 3 1
17. hi cecesssescsssseeesseseesreeesesvenseassaneeansenes order no E43207 Probe L 120 cm 47 2 inch aaa owak A A W AAA AAAA order no E43208 Probe L 140 cm 55 1 MEN sca AAAA ARRAL order no E43209 Probe L 160 cm 63 0 inchi cecesssescsssseseseeseeecssesesrevanssessanesaneenes order no E43210 Fixing of the probe gt Screw the probe to the unit and tighten Recommended tightening torque 4 Nm For ease of installation and removal the probe connection can be rotated without restriction Even if rotated sev eral times there is no risk of damage to the unit Lmin 15 cm 6 0 inch In case of high mechanical stress strong vibration moving viscous media it may be necessary to secure the screw connection e g by a screw retaining com pound Note Such substances may migrate into the medium Make sure that they are harmless When using mechanical means of securing e g tooth lock washer protruding edges must be avoided They may cause interference reflection 5 3 Shortening of the probe The probe can be shortened to adapt to different tank heights NOTE Ensure that the probe length is not below the minimum permissible length of 15 cm 6 0 inch Lmin Proceed as follows gt Screw the probe to the unit gt Mark the desired length L on the probe The reference point is the lower edge of the process connection gt Remove the probe from the unit 12 gt Shorten the p
18. in the delay time the outputs pass into the safe state 5 Installation 5 1 Installation location environment e Vertical installation from the top is preferred For optimum operation the sensor should be installed as near as possible to the tank wall Distance between the probe and the tank wall minimum 40 mm maximum 300 mm The following minimum distances between the probe and tank walls objects in the tank B tank bottom and other level sensors must be adhered to For tank walls which are not straight steps supports or other structures in the tank a distance of 50 mm to the tank wall must be adhered to For probe lengths gt 70 cm the probe can be considerably deflected by move ment of the medium To avoid contacting the tank wall or other structures in the tank in such cases the minimum distances should be increased Reference values Probe length Distance to the tank wall or structures in the tank 10 100 om 100 160 om If the medium is strongly polluted there is the risk that a bridge forms between the probe and the tank wall or structures in the tank To avoid incorrect meas urements adhere to increased minimum distances depending on type and intensity of the pollution e For installation in pipes The inside pipe diameter d must be at least 100 mm Only install the unit in metal pipes e For installation in connection pieces The diameter of the connection piece d must be at least 50 m
19. m The height of the connection piece h must not exceed 40 mm The maximum level must not ex ceed the limit of the block distance BD 40 mm If it is exceeded by more than 10 mm malfunctions can occur Remedies Arrange for a spout in Stall the unit in a connection piece 10 Do not install the unit in the immediate vicinity of a fill opening If possible install a fill pipe A in the tank Minimum distance between the fill pipe and the probe 50 mm higher for probe lengths gt 70 cm and in case of strong pollution see above Strong foam formation and strongly moving surfaces can lead to malfunctions Recommended remedies installation of a still pipe or a bypass Note minimum diameter d 100 mm The upper access to the bypass A and the fill openings of the still pipe B must be above the maximum level The lower edges of the bypass C and the still pipe D must be below the minimum level This ensures that neither foam nor waves impact the sensor zone 5 2 Installation of the probe The probe is not included in the scope of supply It must be ordered separately The following probes are available as accessories Probe L 24 CM 9 5 INCH eee ceceeeesecescenscesecsseeeseeseseceeseaeeeevanesseseeeareenes order no E43203 Probe L 45 em 17 7 ING ca AE AAAA OE ALA GAGA order no E43204 Probe L 70 cm ZZO MC cmesatictadmtmtsmtt us at immi tg mts order no E43205 Probe L 100 cm 39 4 inc
20. rd EN 61000 6 4 and is a class A product The radiated energy of the microwaves is for example much below that of mobile phones According to the current state of science the operation of the unit can be classified to be harmless to human health The unit may cause radio interference in domestic areas If interference occurs the user must take appropriate remedial actions Improper or non intended use may lead to malfunctions of the unit or to un wanted effects in your application That is why installation electrical connec tion set up operation and maintenance of the unit must only be carried out by qualified personnel authorised by the machine operator 2 Items supplied e Level sensor LR3300 In addition for installation and operation the following is necessary Probe Mounting material The following components are available as accessories Probe L 24 em 9 5 INCH cd doza AAA AGA order no E43203 Probe L 45 em 17 7 MCN AGE AE AAAA order no E43204 Probe L 70 cm 27 6 Menta order no E43205 Probe L 100 cm 39 4 INCH eee eeccesesccsscesecsssesseerecesseesersesesausereversetens order no E43207 Probe LSTZUEM 472 MENiS ARA ROEE order no E43208 Probe L 140 cm 5510 na sasiad EW AR AARD order no E43209 Probe L 160 cm 63 0 NCR aaa A i EAC AEG order no E43210 Flange plate 73 90 4 NPT a ae aaa aaa aaa aaa aaa aaa aaa nans order no E43206 Only use ifm probes If other probes are used op
21. robe gt Remove all burrs and sharp edges gt Screw the probe again to the unit and tighten Recommended tightening torque 4 Nm gt Measure exactly the probe length L note the value It must be entered during parameter setting of the unit 9 2 Entering of the probe length unit on delivery 5 4 Installation of the unit in a tank NOTE In all cases the unit needs a metal surface to transfer the measured sig UK nals transfer plate For installation in closed metal tanks the metal lid serves as a transfer plate R 2 ways of installation are possible Screwing in a process connection G34 NPT in the tank lid fig A Installation in the tank lid using a flange plate e g for tanks with thin walls fig For installation in open tanks the unit must be installed using a metal fixture It serves as a transfer plate R Minimum size 150 x 150 mm for a square fixture 150 mm diameter for a circular fixture If possible mount the unit in the middle of the fixture The distance D2 must not be below 40 mm fig C higher for probe lengths gt 70 cm and in case of strong pollution 5 1 The lower edge of the process connec tion should be flush with the installa tion environment Use seals or wash ers D to reach the required height The height can be slightly corrected by means of appropriate sealing material such as Teflon tape When using the ifm flange plates flush installation is ensured
22. timum function is not ensured For correct function the unit needs a large enough metal transfer plate It is neces sary for transferring the microwave pulse to the tank with optimum transmission power For installation in closed metal tanks the tank lid serves as a transfer plate For installation in open tanks a large enough fixing plate or similar must be used gt chapter 5 Installation 3 Functions and features The unit continuously detects the level in tanks and generates output signals ac cording to the parameter settings 2 outputs are available one analogue output and one switching output They can be set separately 3 1 Application area e Hydrous media e Medium temperature 0 80 C Tank pressures 1 4 bar Application examples Detection of coolant emulsion in a machine tool Detection of cleaning liquid in a parts cleaning system 3 2 Restriction of the application area The unit can only be used in metal tanks The unit is not suitable for media with a dielectric constant lt 20 e g oils fats plastic granulates bulk material f the unit is to be used in acids or alkalis in hygienic areas or in electroplating applications First check the compatibility of the product materials gt chapter 12 Technical data with the media to be monitored Incorrect measurements or signal loss may be caused by the following media highly absorbing surfaces e g foam intensely bubbling
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