IFM Electronic LK8122 Operating Instructions Manual Download Page 36

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15 Applications

15.1 Storage tank

Level control and min / max monitoring with 4 switching outputs

Replaces 4 float switches

Configuration of the switching outputs 1...4
SP1

Maximum value exceeded

→ alarm.

ou1

Hysteresis function, normally closed (Hnc).

SP2

Upper preset value exceeded

→

finish refilling.

ou2

Hysteresis function, normally open (Hno).

SP3

Below lower preset value

→ start refilling.

ou3

Hysteresis function, normally closed (Hnc).

SP4

Below min. value

→ alarm.

ou4b

Hysteresis function, normally open (Hno).

rP1...4 Each slightly below SPx to suppress wave movements.

SP1

SP2

OUT1

Hnc

OUT2

Hno

SP3

SP4

OUT3

Hnc

OUT4

Hno

OFS

XX.X

Summary of Contents for LK8122

Page 1: ...Operating instructions Electronic level sensor LK81xx 80264351 00 06 2017 UK ...

Page 2: ... 5 2 4 Offset for indicating the real level in the tank 11 5 2 5 Defined state in case of a fault 11 5 2 6 IO Link function 11 6 Installation 13 6 1 Notes on installation instructions for operation with overflow prevention 14 6 2 Installation instructions for operation without overflow prevention 15 6 2 1 Installation in the inactive zone 15 6 2 2 Installation in the active zone 16 6 3 Further not...

Page 3: ... P n for the outputs 27 10 3 7 Define response of the outputs in case of a fault FOUx 27 10 3 8 Configure display diS 28 10 3 9 Reset all parameters to factory settings rES 28 11 Operation 29 11 1 Operating indicators 29 11 2 Read the set parameters 29 11 3 Error indications 30 11 4 Output response in different operating states 30 12 Technical data 30 12 1 Setting values OFS 31 12 2 Setting values...

Page 4: ...e of the unit must only be carried out by qualified personnel authorised by the machine operator In order to guarantee the correct condition of the device for the operating time it is necessary to use the device only for media to which the wetted materials are sufficiently resistant Technical data It is the operator s responsibility to verify whether the device is suitable for the respective appli...

Page 5: ...ly conductive and adhesive media e g glue shampoo granulates bulk material 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 2 1 For media which are...

Page 6: ...bserve the distances x u and c x min 4 0 cm u min 1 0 cm c max 14 0 cm Fig 4 1 OP c Ground sensor and tank via an electrical connection 7 Observe the parameter setting sequence MEdI OIL 2 10 2 3 OFS u e g u 2 0 cm 5 2 4 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 ...

Page 7: ...serve the maximum permitted level b A distance a2 greater than 5 0 cm must be observed between maximum level b and mounting element Observe the parameter setting sequence MEdI Auto 10 2 3 OFS u e g u 1 0 cm 5 2 4 SP1 Set the switch point at a distance a2 Fig 4 2 c b u a2 x Adjustable step increment 0 5 cm Switch point SP1 is used as overflow prevention pump off close inlet Unit must be reinitialis...

Page 8: ...a correspondingly lower signal The active measurement zone of the sensor probe is composed 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 Operating principle features of the unit The unit can be installed in tanks of diff...

Page 9: ...a detection can only function properly under certain conditions e g compliance with special mounting specifications restrictions for operation and maintenance 5 2 2 Notes on the integrated overflow prevention With the parameter OP OP overflow prevention one of the upper measuring segments is defined as integrated overflow prevention If the overflow prevention OP is activated an adjustment to the i...

Page 10: ...functions The unit displays the current level selectable in cm or inches The set unit of measurement and the switching status of the outputs are indicated by LEDs The unit signals via four switching outputs OUT1 OUT4 that a set limit has been exceeded or that the level is below the limit The parameters of the switching outputs can be set Hysteresis function normally open Fig 5 2 oux Hno Hysteresis...

Page 11: ... parameter however is correctly transmitted via IO Link and can therefore be taken into consideration More information 5 2 6 5 2 5 Defined state in case of a fault In case of a fault a state can be defined for each output If a fault is detected or if the signal quality is below a minimum value the outputs pass into a defined state For this case the response of the outputs can be set via the parame...

Page 12: ...th a USB adapter cable The IODDs necessary for the configuration of the unit detailed information about process data structure diagnostic information parameter addresses and the necessary information about the required IO Link hardware and software can be found at www ifm com ...

Page 13: ... u y OP B Minimum distances Overflow prevention Metal object inside the tank Table 6 1 LK8122 LK8123 LK8124 cm inch cm inch cm inch L rod 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 ...

Page 14: ...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 LK8122 2 5 1 0 3 5 1 4 4 5 1 8...

Page 15: ...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 Table 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 b b1 Max level from the lower edge of the sensor without offset c Max permitted outside length obser...

Page 16: ...without offset Observe further minimum distances according to Table 6 4 Fig 6 3 c b2 L u a2 x c Max permitted outside length observe footnote Table 6 1 a2 Minimum distance between the mounting element and the maximum level b 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 ...

Page 17: ... at least be 12 0 cm 4 8 inch 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 m...

Page 18: ...T 4 OUT 1 OUT 3 L OUT 2 L BU BK WH GY PK VT BN 3 4 2 5 6 7 1 Pin Socket ifm to DIN 47100 1 BN brown white 2 WH white brown 3 BU blue green 4 BK black yellow 5 GY grey grey 6 PK pink pink 7 VT violet blue OUT1 switching output IO Link OUT2 switching output OUT3 switching output OUT4 switching output Colours to ifm Example circuits 4 x positive switching 4 x negative switching L BU BN 3 4 BK 7 6 1 L...

Page 19: ...ousing connection see drawing and a short piece of cable with a wire cross section of min 1 5 mm2 When using metal tanks the tank wall serves as the machine earth For plastic tanks a counter electrode must be provided e g a metal plate inside the tank in parallel with the probe Adhere to minimum distances to the probe ...

Page 20: ...itched LED 7 Switching status OUT2 lights when output 2 is switched LED 8 Switching 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 pressing once 11 Alphanumeric display 4 digits Display of the current level Display of...

Page 21: ... 14 5 M SP4 FH4 S M M M S 20 0 20 0 rP4 FL4 S M S M 19 5 19 5 M dS1 dS2 0 0 Hno Hno ou3 ou4 Hnc 0 0 dr1 0 0 dr2 0 0 dS3 0 0 dr3 0 0 dS4 0 0 dr4 0 0 M S M S M S M S M S M S M S M S M S M S M S M S M M M M M M M M M M M M M M S M M uni cm S M S M diS On M M M M S FOU1 OFF M S FOU2 OFF M M M M M S FOU3 OFF M S FOU4 OFF OFS 0 S M P n PnP M M S cOP 8 0 Menu items highlighted in grey e g cOP are only ac...

Page 22: ...y keeping the button pressed 3 Mode Enter Set Briefly press Mode Enter confirmation The parameter is displayed again the new parameter value becomes effective 4 Change more parameters Start 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 ...

Page 23: ...Setting ranges of all parameters 12 Factory settings of all parameters 14 10 2 1 Setting the unit of measurement uni Enter uni before entering the values for SPx rPx OP or OFS This avoids unintentional maladjustments Select uni Determine unit of measurement cm inch uni 10 2 2 Set the offset OFS The distance between tank bottom and lower edge of the measuring probe can be entered as offset value 5 ...

Page 24: ...swarf The settings OIL 1 and OIL 2 suppress a bottom layer of higher dielectric water or swarf which is a few cm high If no oil layer is present or if it is very thin the bottom layer is detected With the setting MEdI Auto no overflow prevention OP is available In that case the menu items OP and cOP are not available 10 2 4 Set the overflow prevention OP Comply with minimum distances and installat...

Page 25: ...pty The tank may be partly filled Make sure that the overflow prevention OP is not covered by the medium Observe the minimum distance between the overflow prevention OP and the level Table 10 1 Select cOP Press SET and keep it pressed cOP flashes for some seconds then the continuous display indicates that the adjustment is being made If the adjustment is successful donE is displayed Confirm with M...

Page 26: ...tion environment the unit has to be reinitialised when installed Switch the operating voltage off and on again 10 3 Setting of output signals 10 3 1 Set output function oux for OUTx Select oux and adjust the switching function ou1 ou4 Hno hysteresis function normally open Hnc hysteresis function normally closed Fno window function normally open Fnc window function normally closed If the switching ...

Page 27: ...so shifts provided that the lower end of the setting range is not reached 10 3 4 Set the switching delays dSx for switching outputs Select dSx and set the value between 0 0 and 60 s The switching delay reacts according to VDMA dS1 dS4 10 3 5 Set the switch off delay drx for switching outputs Select drx and set the value between 0 0 and 60 s The switching delay reacts according to VDMA dr1 dr4 10 3...

Page 28: ...y is switched off in the operating mode When one of the buttons is pressed the current measured value is displayed for 30 s The indicator LEDs remain on even if the display is deactivated 10 3 9 Reset all parameters to factory settings rES Select rES Press and hold SET until is displayed Briefly press Mode Enter The unit reboots and the factory settings are restored rES ...

Page 29: ...nately The overflow prevention OP is reached overflow warning or the level is above the active zone It is necessary to adjust cOP of the overflow prevention OP Loc Unit locked via operating keys parameter setting impossible For unlocking press the two setting buttons for 10 s uLoc Unit is unlocked parameter setting is possible again C Loc The unit is temporarily locked Parameter setting via IO Lin...

Page 30: ...ower the level if necessary Clean the probe Observe the notes on installation Correct the position of the overflow prevention OP Repeat the adjustment Deactivate OP 5 2 2 SCx LEDs 5 8 Flashing short circuit in switching output x Remove the short circuit SC LEDs 5 8 Flashing short circuit in all switching outputs Remove the short circuit PArA Faulty data set Reset to factory settings rES 11 4 Outpu...

Page 31: ... 1 50 19 5 15 5 6 1 31 0 12 2 46 18 1 14 3 5 6 28 5 11 2 42 16 7 13 0 5 1 26 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 If OFS 0 they increase by the set offset va...

Page 32: ...Requested 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 LK8122 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 Abb 12 1 OP c z B L 12 3 2 Definition from the bottom Response level z of the overflow prevention OP from the ta...

Page 33: ...2 LK8123 LK8124 cm inch cm inch cm inch SPx FHx 2 5 20 0 1 0 8 0 3 5 39 0 1 4 15 4 6 59 2 5 23 5 rPx FLx 2 0 19 5 0 8 7 8 3 0 38 5 1 2 15 2 5 58 2 0 23 0 Step increment 0 5 0 2 0 5 0 2 1 0 5 The values apply if OFS 0 If OFS 0 they increase by the set offset value ...

Page 34: ... prevention MEdI Auto or MEdI C or O and OP OFF 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 operation If the active zone of the sensor was touched with the hand o...

Page 35: ...2 LK8123 LK8124 SP1 6 0 12 0 18 rP1 5 5 11 5 17 SP2 10 0 19 5 29 rP2 9 5 19 0 28 SP3 15 0 29 5 44 rP3 14 5 29 0 43 SP4 20 0 39 0 59 rP4 19 5 38 5 58 OP 20 4 40 7 61 MEdI CLW 1 cOP rES ou1 3 Hno ou4 Hnc dS1 4 0 0 dr1 4 0 0 uni cm P n PnP OFS 0 FOU1 4 OFF diS On ...

Page 36: ... function normally closed Hnc SP2 Upper preset value exceeded finish refilling ou2 Hysteresis function normally open Hno SP3 Below lower preset value start refilling ou3 Hysteresis function normally closed Hnc SP4 Below min value alarm ou4b Hysteresis function normally open Hno rP1 4 Each slightly below SPx to suppress wave movements t L SP1 SP2 1 0 OUT1 Hnc 1 0 OUT2 Hno SP3 SP4 1 0 OUT3 Hnc 1 0 O...

Page 37: ...low wire break If the level reaches SP2 output 2 switches upper preset value reached finish refilling If the level is below SP3 output 3 switches below lower preset value start refilling If the level is above SP4 the output is switched If the level is below SP4 or if there is a wire break output 4 switches OFF alarm message below min value wire break ...

Page 38: ...e lower value submersible pump OFF ou3 Hysteresis function normally closed Hnc rP1 3 Each slightly below SPx to suppress wave movements L SP1 1 0 OUT1 Hnc 1 0 OUT2 Hno SP2 SP3 t 1 0 OUT3 Hnc OFS XX X A B If the level is below SP1 the output is switched If the level is above SP1 or if there is a wire break output 1 switches OFF alarm message overflow wire break If the level exceeds SP2 output 2 swi...

Page 39: ...39 UK More information at www ifm com ...

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