WIKA LH-20 Manual De Instrucciones página 24

8 Supplement
Reference conditions and influencing variables (according to DIN EN 60770-1)
Reference conditions according to DIN EN 61298-1
Ʋ Temperature
Ʋ Relative humidity
Ʋ Air pressure
Determination of characteristics
Characteristic 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 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
Ʋ Turn down up to 5 : 1
Average temperature coefficient of the zero signal upon execution < 0.1 %
Ʋ Turn down 1 : 1
Ʋ 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
Ʋ Suspension cable PE
Ʋ Suspension cable PUR, FEP
Storage and transport temperature
Vibration resistance
Shock resistance
24
+15 ... +25 °C (+59 ... +77 °F)
45 ... 75 %
860 ... 1060 mbar/86 ... 106 kPa (12.5 ... 15.4 psig)
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 cha-
racteristics 2)
50 g, 2,3 ms according to EN 60068-2-27 (mechanical
shock)
WIKA Operating instructions - Submersible pressure transmitter model LH-20