WIKA GDT-20 Mode D'emploi page 47

9. Specifications
9. Specifications
Accuracy specifications
Accuracy The specifications only valid for pure, gaseous SF
Dew point → See graphic in Annex
Span T
Span T
Density ±0.6 %, ±0.35 g/litre (-40 ... 80 °C [-40 ... +176 °F])
Temperature ±1 K
Pressure -40 ... < 0 °C [-40 ... +32 °F]
0 ... 80 °C [32 ... 176 °F]
Long-term drift per IEC 61298-2
Temperature ≤ ±0.1 % of span/year
Pressure ≤ ±0.05 % of span/year
Dew point ≤ ±0.5 % of span/year
Measuring range
Dew point at atmospheric pressure
Density
Temperature
Pressure at 20 °C [68 °F]
Pressure
Burst pressure
Overload limit
Pressure reference
Output signal
Signal type
Retrievable measured
values
Density
Temperature
Absolute pressure
Humidity
Dew point
WIKA operating instructions transmitter, models GDT-20 and GDHT-20
- T < 60 K
gas d
- T < 80 K
gas d
-60 ... +40 °C [-76 ... +104 °F] T
0 ... 60 g/litre (8.87 bar abs. SF₆ gas at 20 °C [68 °F])
-40 ... +80 °C [-40 ... +176 °F]
0 ... 8.87 bar abs. SF₆ gas
0 ...16 bar abs.
52 bar abs.
Up to 30 bar abs.
Absolute
Modbus output

Measured values with alternative units can be retrieved directly in the
Modbus registers.

g/litre, kg/m
3
°C, °F, K
mbar, Pa, kPa, MPa, psi, N/cm
ppm ppm
v, w
°C at tank pressure
■
°C at atmospheric pressure
■
6
Measured value deviation < ±2 K
Measured value deviation < ±3 K
±0.2 %, ±32 mbar
±0.06 %, ±10 mbar
d
, bar
2
EN
47