Wika LH-20 Bedienungsanleitung PDF herunterladen (Seite 24)

8 Supplement

WIKA Operating instructions - Submersible pressure transmitter model LH-20

Deviation determined according to the limit point method according to IEC 60770

Specications refer to the set span. Turn down (TD) is the ratio: nominal measuring range/set span.

Deviation with turn down 1 : 1 bis 5 : 1 < 0.2 %, optionally < 0.1 %

Inuence of the medium or ambient temperature

Specications refer to the set span. Turn down (TD) = nominal measuring range/set span.

Average temperature coecient of the zero signal

In the compensated temperature range of 0 … +80 °C (+32 … +176 °F), reference temperature

20 °C (68 °F).

Average temperature coecient of the zero signal upon execution < 0.2 %

Ʋ Turn down 1 : 1 < 0.15 %/10 K

Ʋ Turn down up to 5 : 1 < 0.2 %/10 K

Average temperature coecient of the zero signal upon execution < 0.1 %

Ʋ Turn down 1 : 1 < 0.05 %/10 K

Ʋ Turn down up to 5 : 1 < 0.1 %/10 K

Long-term stability (according to DIN 16086, DINV 19259-1 and IEC 60770-1)

Specications refer to the set span. Turn down (TD) = nominal measuring range/set span.

Long-term drift of the zero signal < (0.1 % x TD)/year

Process conditions

Product temperature

Ʋ Suspension cable PE -40 … +60 °C (-40 … +140 °F)

Ʋ Suspension cable PUR, FEP -40 … +80 °C (-40 … +176 °F)

Storage and transport temperature -40 … +80 °C (-40 … +176 °F)

Vibration resistance mechanical vibrations with 4 g and 5 … 100 Hz (tested

according to the regulations of German Lloyd, GL cha-

racteristics 2)

Electromechanical data

Suspension cable

Ʋ Conguration 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

Ʋ Wire cross-section 0.5 mm²

Ʋ Wire resistance ≤ 0.036 Ω/m

Ʋ Tensile strength ≥ 1200 N (270 pound force)

Ʋ Max. length 550 m (1804 ft)

Ʋ Min. bending radius 25 mm (with 25 °C/77 °F)

Ʋ Diameter approx. 8 mm (0.315 in)

Ʋ Cable extraction force ≥ 650 N (146.1 lbf)

Ʋ Colour Blue

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Wika LH-20 Bedienungsanleitung Seite 24