WIKA 890.09.2190 - Manual (Page 7)

WIKA operating instructions differential pressure transmitter model 890.09.2190 7
GB
11171545.02 08/2010 GB/D/F/E
3. Specifications
General
Process connection 2 x 7/16 UNF male thread
Materials
„ Pressure connections
„ Sealings
„ Media chamber
„ Sensor element
Cu alloy - wetted
FPM/FKM - wetted
Zinc diecast - wetted
Ceramic Al
2
O
3
- wetted
Differential pressure measuring
ranges
0 ... 1 bar, 0 ... 2 bar, 0 ... 4 bar, 0 ... 6 bar or
0 ... 10 bar
Max. working pressure (stat.) 21 bar
Overpressure safe either side
max.
2.5 x end value of measuring range, max. 21 bar
Pressure spikes are to be reduced through
constructive measures (e.g. capillaries)
Measurement time constant T
mess
= 10 ms (sensor + electronics)
Accuracy (error band) ± 2 % of span (linearity, hysteresis, temperature
error 10 ... 70 °C)
Linearity, hysteresis ± 1 % of span
Temperature coefficient 0.2 % of span / 10 K
Zero offset ± 0.1 mA
Permissible ambient temperature -10 °C ... 50 °C
Permissible medium temperature -10 °C … 80 °C
Ingress protection IP 55 per EN 60529 / IEC 529
Electrical data
Nominal voltage DC 24 V
Permissible supply voltage DC 18 … 30 V
Electrical connection 3-wire
Output signal 4 ... 20 mA
Max. load 500 Ohm
Current supply
„ at output max.
„ at current limitation
approx. 32 mA normal (typical)
approx. 36 mA (at overpressure)
Wiring protection Short-circuit-proof, after eliminating the fault the
operability is recovered
Electrical connection
„ 3-wire numbered cable
„ Connection with snap-in M8
connector (3-pin)
0.34 mm², 0.8 m to 2.5 m long
replaceable at the instrument, outer cable end
with single wires for clamping
3. Specifications