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8 Supplement
Electromechanical data
Suspension cable
Ʋ Configuration
Ʋ Wire cross-section
Ʋ Wire resistance
Ʋ Tensile strength
Ʋ Max. length
Ʋ Min. bending radius
Ʋ Diameter approx.
Ʋ Cable extraction force
Ʋ Colour
Voltage supply
Operating voltage 4 ... 20 mA
Ʋ Deviation < 0.2 %
Ʋ Deviation < 0.1 %
Operating voltage 4 ... 20 mA/HART
Permissible residual ripple
Ʋ < 100 Hz
Ʋ 100 Hz ... 10 kHz
Reverse voltage protection
load max.
Integrated overvoltage protection
Discharge current (8/20 µs)
Min. response time
Electrical protective measures
Protection transmitter
Connection of the feeding power supply
unit
Altitude above sea level
Ʋ by default
Ʋ with connected overvoltage protection up to 5000 m (16404 ft)
Pollution degree
2)
Protection class
EU conformity
Directive for hazardous materials (RoHS) 2011/65/EU
Explosion protection directive (ATEX) 2014/34/EU (optional)
When used with fulfilled housing protection.
2)
WIKA Operating instructions - Submersible pressure transmitter model LH-20
All manuals and user guides at all-guides.com
two wires with 4 ... 20 mA or up to six wires with
4 ... 20 mA/HART Pt100, one suspension wire, one
breather capillary, screen braiding, foil, mantle
0.5 mm²
≤ 0.036 Ω/m
≥ 1200 N (270 pound force)
550 m (1804 ft)
25 mm (at 25 °C/77 °F)
8 mm (0.315 in)
≥ 650 N (146.1 lbf)
Blue
8 ... 30 V DC
9.6 ... 30 V DC
9.6 ... 30 V DC
U
< 1 V
ss
U
< 10 mV
ss
Integrated
≤ (U
-10 V)/0.022 A
B
5 kA
< 25 ns
IP 68 (30 bar)
Networks of overvoltage category III
up to 2000 m (6562 ft)
4
III
25
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