WIKA GDT-20 Mode D'emploi page 48

9. Specifications
Output signal
Frost point
EN
Relative humidity
Absolute pressure at
20 °C [68 °F]
Gauge pressure at
20 °C [68 °F] (based
on 1,013 mbar)
Alternative gases
Voltage supply
Supply voltage U
Power consumption
Refresh rate
Density
Temperature
Pressure
Dew point
Electrical connection
Connection type
Ingress protection
Electrical safety
Material
Material (in contact with the environment)
Case
Operating conditions
Ambient temperature range
Permissible air humidity
48
°C at tank pressure
■
°C at atmospheric pressure
■
%
bar, MPa
bar, MPa
Gas mixtures and components can be freely configured and combined
from the gases SF₆, N₂, CF₄, O₂, CO₂, 3M™ Novec™ 4710, He and Ar
via Modbus The calculation is based on the physical principle of the
®.
partial pressure method.
+ DC 17 ... 30 V
B
Max. 0.5 W (max. 3 W during the heating phase of the
humidity sensor)
20 ms
20 ms
20 ms
2 s (typical)
■
Auto-adjustment cycle, every 30 min., adjustable
■
Circular connector M12 x 1 (5-pin)
■
Modbus RTU via RS-485 interface

■
IP65, only when plugged in and using mating connectors with the corre-
sponding ingress protection
Protected against reverse polarity, protected against overvoltage
Stainless steel
-40 ... +80 °C [-40 ... +176 °F]
≤ 90 % r. h. (non-condensing)
WIKA operating instructions transmitter, models GDT-20 and GDHT-20