Wika LH-20 Manual de usuario descargar pdf (Pagina 25)

8 Supplement

WIKA Operating instructions - Submersible pressure transmitter model LH-20

Voltage supply

Operating voltage 4 … 20 mA

Ʋ Deviation < 0.2 % 8 … 30 V DC

Ʋ Deviation < 0.1 % 9.6 … 30 V DC

Operating voltage 4 … 20 mA/HART 9.6 … 30 V DC

Permissible residual ripple

Ʋ < 100 Hz U

< 1 V

Ʋ 100 Hz … 10 kHz U

< 10 mV

Reverse voltage protection Integrated

load max. ≤ (U

-10 V)/0.022 A

Integrated overvoltage protection

Nominal leakage current (8/20 µs) 5 kA

Min. response time < 25 ns

Electrical protective measures

Protection transmitter IP 68 (30 bar)

Overvoltage category III

Protection class III

CE conformity

ATEX 94/9/EG (optional)

4 … 20 mA:

EMC directive 2004/108/EG, EN 61326 Emission (group 1, class B) and interference resistance

(industrial area)

4 … 20 mA/HART:

EMC directive 2004/108/EG, EN 61326 Emission (group 1, class A) and interference resistance

(industrial area)

Warning:

according to EN 55011 or CISPR 11

This is an equipment of class A for emitted interference and is designed for use in

industrial environment. In other environments such as e.g. in living or business areas, this

equipment can interfere other instruments.

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Wika LH-20 Manual de usuario Pagina 25