Wika LH-10 Manual do Utilizador descarregar pdf (Página 12)

12 WIKA operating instructions submersible pressure transmitter, model LH-10

14075011.01 08/2013 GB/D/F/E

6. Commissioning, operation

6.2.2 Pin assignment

Cable outlet 2-wire 3-wire

brown brown

green green

- white

Shield grey grey

6.2.3 Setting up a voltage supply

The power supply for the pressure transmitter must be made via an energy-limited electrical circuit in accordance with

section 9.3 of UL/EN/IEC 61010-1, or an LPS to UL/EN/IEC 60950-1, or (for North America) class 2 in accordance with

UL1310/UL1585 (NEC or CEC). The power supply must be suitable for operation above 2,000 m should the pressure

transmitter be used at this altitude.

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Power supply

The power supply depends on the selected output signal.

4 ... 20 mA: DC 10 ... 30 V

0 ... 20 mA: DC 10 ... 30 V

DC 0 ... 5 V: DC 10 ... 30 V

DC 0 ... 10 V: DC 14 ... 30 V

DC 0.5 ... 2.5 V:

5 ... 30 V (suitable for battery operation)

■

LoadinΩ

Current output (2-wire): ≤ (power supply - 10 V) / 0.02 A - (cable length in m x 0.14 Ω)

Current output (3-wire): ≤ (power supply - 3 V) / 0.02 A - (cable length in m x 0.14 Ω)

Voltage output (3-wire): > 100 kΩ

6.3 Functional check

The output signal must be proportional to the prevailing pressure. If this is not the case, this may indicate a damaged

diaphragm. In this case, see chapter 8 “Faults”.

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Wika LH-10 Manual do Utilizador Página 12