WIKA LH-20 Betriebsanleitung Seite 27

8 Supplement
Determination of characteristics
Characterstic curve
Reference installation position
Influence of the installation position
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
Influence of the product 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 %
Turn down 1 : 1
-
Turn down up to 5 : 1
-
Average temperature coefficient of the zero signal upon execution < 0.1 %
Turn down 1 : 1
-
Turn down up to 5 : 1
-
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
Process conditions
Product temperature
Suspension cable PE
-
Suspension cable PUR, FEP
-
Storage and transport temperature
Vibration resistance
Electromechanical data
Suspension cable
Configuration
-
Wire cross-section
-
Wire resistance
-
Tensile strength
-
WIKA Operating instructions – Submersible pressure transmitter model LH-20
Limit point adjustment according to IEC 61298-2
Linear
upright, diaphragm points downward
< 0.2 mbar/20 Pa (0.003 psig)
< 0.2 %, optionally < 0.1 %
< 0.15 %/10 K
< 0.2 %/10 K
< 0.05 %/10 K
< 0.1 %/10 K
< (0.1 % x TD)/year
-40 ... +60 °C (-40 ... +140 °F)
-40 ... +80 °C (-40 ... +176 °F)
-40 ... +80 °C (-40 ... +176 °F)
mechanical vibrations with 4 g and 5 ... 100 Hz
(tested according to the regulations of German
Lloyd, GL characteristics 2)
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
0.5 mm²
≤ 0.036 Ω/m
≥ 1200 N (270 pound force)
27