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Датчик предельной проводимости Conductive Level Limit Switch LKL-P* Pepperl+Fuchs

Каталожный номер T33194
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Directive conformity
Electromagnetic compatibility
Directive 2014/30/EUEN 61326-1:2006 , EN 61326-2-3:2006
Low voltage
Directive 2014/35/EUEN 61010-1:2001
Conformity
Electromagnetic compatibilityNE 21
Degree of protectionIEC 60529:2001
Vibration resistanceEN 60068-2-64
Climate classEN 60068, part 2-38 (test Z/AD)
Function and system design
Measuring principleAn alternating voltage exists between the probes in an empty tank.
As soon as the conductive liquid in the tank creates a connection between the ground probe and, for example, the maximum probe, a measurable current flows and the device switches. With level limit detection, the device switches back as soon as the liquid clears the maximum probe. With two-point control, the device does not switch back until the max and min probe is cleared.
Using alternating voltage prevents corrosion of the probes and electrolytic destruction of the product. The material used for the tank walls is not important for measurement because the system is designed as a closed potential-free circuit between the probes and the electronics. There is absolutely no danger if the probes are touched during operation.
Equipment architectureprobe with integrated electronic insert (compact instrument version)
probe without integrated electronic insert (separate instrument version) for one, two or multiple point detection respectively, see section measuring system
Input characteristics
Measured variableresistance change between two conductors caused by the presence or absence of a conductive product.
Measurement rangeThe measuring range is dependent on the mounting location of the probes.
Rod probes can have a max. length of 4000 mm (13 ft) and rope probes up to 15000 mm (49 ft).
Output characteristics
Output signalsee section electrical connection
Measurement rangeA total of four measuring ranges (100 &Omega, 1 k&Omega, 10 k&Omega, 100 k&Omega) can be set via two DIL switches (SENS). The setting on delivery is 100 k&Omega.
Auxiliary energy
Electrical connectionsee section electrical connection
Supply voltageOutput E5 (FEW52):
supply voltage 10.8 ... 45 V DC
load connection: open collector PNP
switching voltage: max. 45 V
Output WA (FEW54):
supply voltage 20 ... 55 V DC or 20 ... 253 V AC, 50/60 Hz
peak inrush current: max. 2 A, max. 400 µs
output: two potential-free change-over contacts
output N1 (FEW58): refer to datasheet of the connected switch amplifier acc. to IEC 60947-5-6 (NAMUR)
Power consumptionOutput E5 (FEW52): P < 1.1 W
output WA (FEW54): P < 2.0 W
Current consumptionOutput E5 (FEW52): I < 25 mA (without load)
output WA (FEW54): 60 mA
Measurement accuracy
Reference operating conditionsambient temperature: 23 °C (296 K), medium temperature: 23 °C (296 K),
medium viscosity: medium must release the probe again (drain off), medium pressure pe: 0 bar,
probe installation: vertically from above
Maximum measured error± 10 % at 0.1 ... 100 k&Omega
± 5 % at 1 ... 10 k&Omega
Non-repeatability± 5 % at 0.1 ... 100 k&Omega
± 1 % at 1 ... 10 k&Omega
Hysteresis-10 % for the max probe, in reference to the switch point, &Deltas function deactivated
Influence of ambient temperature< 0.05 %/K
Switching time< 3 s
Operating conditions
Installation conditions
Mounting locationThe rod and rope probes are mounted predominantly in tanks made of plastic or metal.
Mounting examplessee section example applications
Ambient conditions
Ambient temperature-40 ... 70 °C (-40 ... 158 °F)
-40 ... 60 °C (233 ... 333 K) for output N1 (FEW58)
Storage temperature-40 ... 80 °C (-40 ... 176 °F)
Climate classtropicalized
Shock resistancepractical test
Vibration resistance20 ... 2000 Hz, 1 (m/s2)2/Hz
Process conditions
Medium temperature-40 ... 100 °C (-40 ... 212 °F)
Medium pressure-1 ... 10 bar (-14.5 ... 145 psi)
Conductivity&ge 10 µS
Mechanical specifications
Degree of protectionIP66
Data for application in connection with hazardous areas
EC-Type Examination CertificateTÜV 03 ATEX 2295
Group, category, type of protectionEx-Hexagon II 2G Ex ia/ib IIC T4
Directive conformity
Directive 2014/34/EUEN 60079-0:2009 , EN 60079-11:2007
Mechanical construction
DimensionsLKL-P1:
- housing: max. Ø85 mm (3.3 inch), height max. 145 mm (5.7 inch)
- rod: length 100 ... 4000 mm (4 in ... 13 ft)
LKL-P2:
- housing: max. Ø85 mm (3.3 inch), height max. 145 mm (5.7 inch)
- rope: length 250 ... 15000 mm (10 in ... 49 ft)
Massseparate instrument version:
- rod, 1 m (3 ft) long, LKL-P1 with 2, 3 or 5 rods: 415 g, 530 g, 760 g
- rope, 1 m (3 ft) long, LKL-P2 with 2, 3 or 5 ropes: 390 g, 470 g, 640 g
compact instrument version:
- rod, 1 m (3 ft) long, LKL-P1 with 2 or 3 rods (600 g/720 g)
- rope, 1 m (3 ft) long, LKL-P2 with 2 or 3 ropes (710 g/800 g)
Materialprobes:
- rods: rod 1.4404/316L, insulation: PP
- ropes: rope 1.4571/316Ti, insulation FEP, weight 1.4435/316L
housing:
- output NA (separate instrument version): housing PPS, cover PBT
- output E5/WA/N1 (compact instrument version): housing PBT, cover PBT, adapter PBT
process connections: PPS
Certificates and approvals
Overspill protectionsee approval (ZE)

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Производитель Pepperl+Fuchs

 

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