WIKA LH-20 - Manual (Page 25)

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
ss
< 1 V
Ʋ 100 Hz … 10 kHz U
ss
< 10 mV
Reverse voltage protection Integrated
load max. ≤ (U
B
-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.