58
9 Supplement
WIKA Operating Instructions - Process pressure transmitter IPT-2x
Thermal change, current output
< 0.05 %/10 K, max. < 0.15 %, each with -40 … +80 °C
(-40 … +176 °F)
0,3 %
-0,15 %
-40°C
-20°C
20°C
40°C
60°C
80°C
0,15 %
-0,3 %
Fig. 29: Thermal change, current output
Long-term stability (according to DIN 16086)
Applies to the respective
digital
signal output (e.g. HART, Profibus PA) as well as to
analogue
cur-
rent output 4 … 20 mA under reference conditions. Specifications refer to the set span. Turn down
(TD) is the ratio nominal measuring range/set span.
14)
Long-term staibility - Ceramic/metallic measuring cell
Time period
One year
< 0.05 % x TD
Five years
< 0.1 % x TD
Ten years
< 0.2 % x TD
Long-term stability - Piezoresistive/Strain gauge measuring cell
Version
Measuring ranges > 1 bar
< 0.1 % x TD/year
Measuring ranges > 1 bar, isolating liquid, synthetic oil,
diaphragm Elgiloy (2.4711)
< 0.15 % x TD/year
Measuring range 1 bar
< 0.15 % x TD/year
Measuring range 0.4 bar
< 0.35 % x TD/year
Ambient conditions
Version
Ambient temperature
Storage and transport temperature
Standard version
-40 … +80 °C (-40 … +176 °F) -60 … +80 °C (-76 … +176 °F)
Version IP66/IP68 (1 bar)
-20 … +80 °C (-4 … +176 °F)
-20 … +80 °C (-4 … +176 °F)
Version IP68 (25 bar), with connection
cable PUR
-20 … +80 °C (-4 … +176 °F)
-20 … +80 °C (-4 … +176 °F)
Version IP68 (25 bar), connection ca-
ble PE
-20 … +60 °C (-4 … +140 °F)
-20 … +60 °C (-4 … +140 °F)
14)
With ceramic/metallic measuring cell with gold-coated diaphragm, the values must be multiplied with factor 3.
