WIKA LH-20 - Manual (Page 24)

24
8 Supplement
WIKA Operating instructions - Submersible pressure transmitter model LH-20
Deviation determined according to the limit point method according to IEC 60770
Specifications 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 %
Influence of the medium or ambient temperature
Specifications refer to the set span. Turn down (TD) = nominal measuring range/set span.
Average temperature coefficient of the zero signal
In the compensated temperature range of 0 … +80 °C (+32 … +176 °F), reference temperature
20 °C (68 °F).
Average temperature coefficient 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 coefficient 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)
Specifications 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 Configuration 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