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5.5.2 Level measurement without overflow prevention

[SEL2] = [LEVL]
[MEdI] = [Auto] or [OP] = [OFF] (overflow prevention OP deactivated)

Fig. 5-6

Fig. 5-7

[ou2] = [I] or [U]

[ou2] = [InEG] or [UnEG]

I [mA] / U [V]

L

A

20 / 10

4 / 0

I [mA] / U [V]

I [mA] / U [V]

L

A

20 / 10

4 / 0

I [mA] / U [V]

A: Active zone

L: Level

[MEdI] = [Auto] or [OP] = [OFF]:

Operating mode with the smallest operational reliability

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Содержание LT30 Series

Страница 1: ...Operating instructions Electronic level and temperature sensor LT30xx UK 05 2019 80264354 00 ...

Страница 2: ...5 5 Analogue function 12 5 5 1 Level measurement with overflow prevention 12 5 5 2 Level measurement without overflow prevention 14 5 5 3 Temperature measurement 15 5 6 Switching functions 17 5 7 Offset for indicating the real level in the tank 18 5 8 Defined state in case of a fault 18 5 9 Extreme value memory 18 5 10 IO Link 18 6 Installation 19 6 1 Installation instructions for operation with o...

Страница 3: ...function ou2 for OUT2 analogue output 32 10 3 3 Define switching limits SP1 rp1 hysteresis function 32 10 3 4 Define switching limits FH1 FL1 window function 32 10 3 5 Scale analogue signal ASP2 AEP2 32 10 3 6 Set switching delay dS1 for switching output 33 10 3 7 Set switch off delay dr1 for switching output 33 10 3 8 Define switching logic P n for switching output 33 10 3 9 Define response of th...

Страница 4: ...1 Setting values OFS 37 13 2 Setting ranges switching limits for level 37 13 3 Setting ranges switching limits for temperature 37 13 4 Setting values OP 38 13 5 Calculation aids OP 39 13 5 1 Definition from the cover 39 13 5 2 Definition from the bottom 39 13 6 Setting ranges ASP2 and AEP2 40 14 Maintenance cleaning change of medium 40 14 1 Maintenance information for operation without overflow pr...

Страница 5: ...t must be suitable for the corresponding applications and environ mental conditions without any restrictions Only use the product for its intended purpose Functions and features Only use the product for permissible media Technical data If the operating instructions or the technical data are not adhered to personal injury and or damage to property may occur The manufacturer assumes no liability or ...

Страница 6: ... use in grinders increased risk of formation of deposits It is possible that foam of good conductivity is detected as level Test proper functioning in an application test For water and hydrous media with temperatures 35 C install the unit in a climatic tube Accessories For automatic medium detection 5 3 1 For media which are very inhomogeneous separate from each other and thus forming separation l...

Страница 7: ... electrical connection 7 Observe the parameter setting sequence MEdI OIL 2 10 2 6 OFS u e g u 2 0 cm 5 7 OP Set the overflow prevention OP at a distance y greater than 4 5 cm below the mounting element For distances y smaller than 4 5 cm there may be malfunctioning and error messages during the adjustment process cOP Fig 4 1 OP c Step increment and setting range 13 4 Calculation aids for OP 13 5 A...

Страница 8: ...mitted level b A distance a2 greater than 5 0 cm must be observed between maximum level b and mounting element Ensure distance a2 by means of appropriate mechanical measures e g overflow or by setting a threshold value in the PLC Observe the parameter setting sequence MEdI Auto 10 2 6 OFS u e g u 1 0 cm 5 7 Fig 4 2 c b u a2 x Switch point SP1 can be used for monitoring the medium temperature Unit ...

Страница 9: ...posed of 16 capacitive measuring segments They generate measurement signals depending on the degree of coverage Fig 5 1 A I I E I Inactive zone A Active zone 16 active segments E Electrical field Dimensions Technical data sheet 5 2 Measuring principle temperature The temperature is detected by a Pt element at the lower end of the probe and electronically evaluated Media without water content e g o...

Страница 10: ...ity The medium to be detected is set manually MEdI In addition an integrated independently functioning overflow prevention is available 2 Manual media selection without overflow prevention Medium operational reliability The medium to be detected is set manually as described under 1 However the overflow prevention is deactivated For this reason no adjustment is required 3 Automatic medium detection...

Страница 11: ...witches if as the level rises the switching output has not switched even though the corresponding switch point has been exceeded e g due to application related malfunctions Typically the overflow prevention OP reacts when the selected measuring segment has been reached a few mm before the set OP value The overflow prevention OP replies immediately and without delay The set delay times e g of a swi...

Страница 12: ... in FOU2 5 5 1 Level measurement with overflow prevention SEL2 LEVL OP value overflow prevention OP activated ou2 I or U Fig 5 2 Fig 5 3 OP positioned in the upper segment OP shifted downward I mA U V L 20 10 4 0 A OP I mA U V L 20 10 4 0 A OP A Active zone OP Measuring segment overflow prevention OP L Level The measuring range is limited by the active measuring segment OP If the level reaches the...

Страница 13: ...4 0 A OP I mA U V L 20 10 4 0 A OP A Active zone OP Measuring segment overflow prevention OP L Level The measuring range is limited by the active measuring segment OP If the level reaches the measuring segment OP the output signal jumps to its minimum value 4 mA 0 V The position of the measuring segment OP does not have any influence on the gradient of the curve ...

Страница 14: ...MEdI Auto or OP OFF overflow prevention OP deactivated Fig 5 6 Fig 5 7 ou2 I or U ou2 InEG or UnEG I mA U V L A 20 10 4 0 I mA U V I mA U V L A 20 10 4 0 I mA U V A Active zone L Level MEdI Auto or OP OFF Operating mode with the smallest operational reliability 5 3 1 ...

Страница 15: ...t function current output Fig 5 8 Fig 5 9 Maximum measuring range at ou2 I Scaled measuring range at ou2 I MAW MEW 20 5 20 4 3 8 T C F I mA I mA T C F MEW MAW AEP2 ASP2 20 5 20 4 3 8 MAW Initial value of the measuring range MEW Final value of the measuring range ASP2 Analogue start point AEP2 Analogue end point Within the measuring range 20 90 C 4 194 F the output signal is between 4 20 mA at ou2 ...

Страница 16: ...ue of the measuring range MEW Final value of the measuring range ASP2 Analogue start point AEP2 Analogue end point Within the measuring range 20 90 C 4 194 F the output signal is between 0 10 V at ou2 U or 10 0 V at ou2 UnEG without figure If the temperature value T is outside the measuring range the output signal reacts as below ou2 U ou2 UnEG T MAW ASP2 0 V 10 3 10 V T MEW AEP2 10 10 3 V 0 V ...

Страница 17: ...mally open Fig 5 12 ou1 Hno Hysteresis function normally closed Fig 5 12 ou1 Hnc First the set point SP1 is set then the reset point rP1 with the requested difference rP1 The hysteresis for the overflow prevention OP is fixed Window function normally open Fig 5 13 ou1 Fno Window function normally closed Fig 5 13 ou1 Fnc The width of the window can be set by means of the difference between FH1 and ...

Страница 18: ...a minimum value the outputs pass into a defined state For this case the response of the outputs can be set via the parameters FOU1 FOU2 10 3 9 5 9 Extreme value memory The minimum and maximum values of the temperatures occurred since the last memory reset can be retrieved via the menu items Lo T and Hi T 5 10 IO Link This unit has an IO Link communication interface which requires an IO Link capabl...

Страница 19: ...Metal object inside the tank Table 6 1 LT3022 LT3023 T3024 cm inch cm inch cm inch L probe length 26 4 10 4 47 2 18 6 72 8 28 7 M mounting zone 14 0 5 5 23 0 9 1 36 0 14 2 c max outside length Applies to installation as shown wall thickness of the tank lid was neglected mounting element does not protrude inside the tank Otherwise note mounting zone M ...

Страница 20: ...bserve the notes on the integrated overflow prevention OP The overflow prevention OP must 1 be below the mounting element 2 be set at a minimum distance y to it The minimum distance is measured between lower edge mounting element and OP value Table 6 2 MEdI CLW 1 MEdI CLW 2 OIL 1 MEdI OIL 2 cm inch cm inch cm inch x 2 0 0 8 3 0 1 2 4 0 1 6 u 1 0 0 4 1 0 0 4 1 0 0 4 y LT3022 2 5 1 0 3 5 1 4 4 5 1 8...

Страница 21: ...xceed I1 see Table 6 3 Ensure that the maximum level b1 is not exceeded after completed installation see Table 6 3 Observe further minimum distances according to Fig 6 4 Fig 6 2 A I1 c I2 b1 a1 x u I1 I2 Inactive zones A Active zone a1 Minimum distance between the inactive zone I1 and the maximum level b1 b1 Max level from the lower edge of the sensor without offset c outside length max outside le...

Страница 22: ... a2 without offset Observe further minimum distances according to Table 6 4 Fig 6 3 c b2 L u a2 x c outside length max outside length Table 6 1 a2 Minimum distance between the mounting element and the maximum level b2 b2 Max level from the lower edge of the sensor Table 6 4 MEdI CLW 1 MEdI CLW 2 OIL 1 MEdI OIL 2 Auto cm inch cm inch cm inch x 2 0 0 8 3 0 1 2 4 0 1 6 u 1 0 0 4 1 0 0 4 1 0 0 4 a2 LT...

Страница 23: ...t be 12 cm 4 8 inches Install sensor in the centre For mounting in metal pipes the inside pipe diameter d must be at least Table 6 5 MEdI CLW 1 MEdI CLW 2 OIL 1 MEdI OIL 2 Auto cm inch cm inch cm inch d 4 0 1 6 6 0 2 4 10 0 4 0 6 3 1 Marking of the installation height Fix the set installation height with the supplied stainless steel tube clip If the sensor is removed from the fixture for maintenan...

Страница 24: ...V Colours to DIN EN 60947 5 2 Example circuits 1 x positive switching 1 x analogue 1 x negative switching 1 x analogue L L 3 4 2 1 BU BK WH BN 2 OUT 2 4 OUT 1 L L 3 4 1 BU BK BN 2 OUT 2 4 OUT 1 2 WH For safe function the sensor housing must be electrically connected to the counter electrode grounding Use the housing connection see drawing and a short piece of cable with a wire cross section of min...

Страница 25: ...g status OUT1 lights when output 1 is switched 9 Mode Enter button Selection of the parameters and acknowledgement of the parameter values 10 Set button Setting of the parameter values continuously by holding pressed incremental by press ing briefly 11 Alphanumeric display 4 digits Display of the current level the current temperature Display of the parameters and parameter values Display of the op...

Страница 26: ... S ou1 Hno 0 0 ou2 dS1 dr1 0 0 S S S M I M M uni L cm S M M M M M M uni T C S S S M M OFS S M M M S 0 FOU1 OFF M S FOU2 OFF P n PnP M S M S M 19 5 M ASP2 S M M M S 10 AEP2 85 9 5 Lo T M M S Hi T M M M S SEL1 TEMP M S SEL2 LEVL M S M M M S SELd LEVL diS On Menu items highlighted in grey e g cOP are only active when assigned parameters have been selected ...

Страница 27: ...again with step 1 Finishing the parameter setting Wait for 30 s or press and hold Mode Enter The current measured value is displayed Release Mode Enter The parameter setting is completed Decrease the value let the display move to the maximum setting value Then the cycle starts again at the minimum setting value Timeout If no button is pressed for 30 s during programming the unit returns to the ope...

Страница 28: ... 10 2 2 Assign process value to the display SELd Select SELd Select process value that is to be displayed as default SELd LEVL Level is displayed TEMP Temperature is displayed 10 2 3 Define unit of measurement for level uni L Enter uni L before the limits for level are entered This avoids unintentional maladjustments Select uni L Define unit of measurement for the level uni L cm level in cm inch l...

Страница 29: ...s CLW 2 water hydrous media coolant emulsion for temperatures 35 C installation in climatic tube OIL 1 oils with an increased dielectric constant e g some synthetic oils OIL 2 oils with a low dielectric constant e g mineral oils Auto automatic medium detection In case of doubt select OIL 2 for oils Test proper functioning in an application test The settings CLW 1 and CLW 2 suppress deposits e g me...

Страница 30: ...and cleaning operations are to be considered in the verification For setting OP OFF the parameter cOP is not available 10 2 8 Adjust the overflow prevention cOP Only adjust the overflow prevention OP when the unit is installed If possible carry out the adjustment when the tank is empty The tank may be partly filled Make sure that the overflow prevention OP is not covered by the medi um Observe the...

Страница 31: ...n the sensor and the tank ground e g cable length was changed With deactivated overflow prevention MEdI Auto or OP OFF it is necessary for the unit for applying the basic settings and adaptation to the medium and installation environment 1 to be installed in the application 2 to be reinitialised Switch the operating voltage off and on again 10 3 Setting of output signals 10 3 1 Set output function...

Страница 32: ...han SP1 If SP1 is shifted rP1 also shifts provided that the lower end of the setting range is not reached 10 3 4 Define switching limits FH1 FL1 window function Make sure that for ou1 the function Fno or Fnc is set First set FH1 then FL1 Select FH1 and set the upper limit of the acceptable range FH1 Select FL1 and set the lower limit of the acceptable range FL1 FL1 is always lower than FH1 The uni...

Страница 33: ...e of a fault Analogue output switches on 3 6 mA 0 V in case of a fault OU Output reacts according to process value if possible A hardware fault too low a signal quantity overtemperature or undertemperature are considered to be a fault Overflow is not considered to be a fault 12 5 10 3 10 Configure display diS Select diS and set value diS On The display is switched on in the operating mode Update o...

Страница 34: ...via IO Link Only when the OP adjustment has been carried out successfully does the unit revert to the cyclical process data transmission After a factory reset button Restore Factory Settings the device reboots and the factory settings are restored 12 Operation After switch on of the operating voltage the unit is in the operating mode normal operating mode It carries out its measurement and evaluat...

Страница 35: ...tive temporary locking S Loc Unit is permanently locked via software This locking can only be removed with a parameter setting software 12 2 Read the set parameters Briefly press Mode Enter if required repeat several times Menu items are passed through until the requested parameter has been reached Briefly press Set Respective parameter value is displayed for 30 s 12 3 Read reset extreme value mem...

Страница 36: ...sition of the overflow prevention OP Repeat the adjustment Deactivate OP 5 3 1 cr UL Error temperature below approx 40 C 45 F Check process temperature and correct if necessary cr OL Error temperature exceeding approx 125 C 255 F Check process temperature and correct if necessary SC1 LED 8 Flashing short circuit in switching output OUT1 Remove the short circuit PArA Faulty data set Reset to factor...

Страница 37: ...d setting values Tab 12 4 apply to OFS 0 if OFS 0 they increase by the set OFS value 13 2 Setting ranges switching limits for level Table 12 2 LT3022 LT3023 LT3024 cm inch cm inch cm inch SP1 FH1 2 5 20 0 1 0 7 8 3 5 39 0 1 4 15 4 6 0 59 0 2 5 23 5 rP1 FL1 2 0 19 5 0 8 7 6 3 0 38 5 1 2 15 2 5 0 58 0 2 0 23 0 Step increment 0 5 0 2 0 5 0 2 1 0 5 13 3 Setting ranges switching limits for temperature ...

Страница 38: ... 1 10 3 39 15 2 11 8 4 7 23 6 9 3 35 13 8 10 6 4 2 21 2 8 3 31 12 3 9 4 3 7 18 8 7 4 28 10 9 8 2 3 2 16 3 6 4 24 9 5 6 9 2 7 13 9 5 5 20 8 0 OPx Setting range OP The indicated values for OP refer to the distance between OP and the lower edge of the probe The values apply if OFS 0 With OFS 0 the values increase by the set OFS value Example LT3022 According to Table 12 4 OP has to be set to segment ...

Страница 39: ...equested distance y of the overflow prevention OP from the cover is defined Without offset OFS 0 OP L c y With offset OFS u OP L c y u or OP B y Example LT3022 c 3 0 cm y 5 0 cm u 1 0 cm Without offset OP 26 4 cm 3 0 cm 5 0 cm 18 4 cm With offset OP 26 4 cm 3 0 cm 5 0 cm 1 0 cm 19 4 cm Fig 12 1 OP c z B L 13 5 2 Definition from the bottom Response level z of the overflow prevention OP from the tan...

Страница 40: ...ntenance information for operation without overflow prevention MEdI Auto or OP OFF overflow prevention OP deactivated The unit must be reinitialised in the following cases switch the operating voltage briefly off and on again After all maintenance operations After cleaning operations e g water jet cleaning of the sensor probe If the sensor was removed from the tank and then installed again during ...

Страница 41: ... 67 C ASP2 0 0 C 0 0 C 0 0 C AEP2 90 0 C 90 0 C 90 0 C MEdI OIL 2 OIL 2 OIL 2 OP 20 4 cm 40 7 cm 61 0 cm cOP rES ou1 Hno ou2 I dS1 0 0 dr1 0 0 uni L cm uni T C P n PnP Lo T Hi T OFS 0 FOU1 OFF FOU2 OFF SEL1 TEMP SEL2 LEVL SELd LEVL diS On Parameter only available for SEL2 TEMP More information at www ifm com ...

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