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WIKA operating instructions transmitter, models GDT-20, GDHT-20
14063434.02 10/2019 EN/DE
EN
3. Specifications
3.
Specifications
Measuring ranges
Dew point at ambient pressure: -50 ... +30 °C (GDHT-20 only)
Density
1)
:
0 ... 60 g/litre (8.87 bar abs. SF₆ gas at 20 °C)
Temperature:
-40 ... +80 °C
Pressure at 20 °C:
0 ... 8.87 bar abs. SF₆ gas
Pressure:
0 ... 16 bar abs.
Burst pressure:
52 bar abs.
Overpressure limit:
up to 30 bar abs.
Pressure reference:
Absolute
1) The pressure conditions are configured during the calculation of the gas mixture.
Permissible temperature ranges
Operating temperature: -40 ... +80 °C, -40 ... +176 °F
Storage temperature:
-40 ... +80 °C, -40 ... +176 °F
Permissible humidity
≤ 90 % r. h. (non-condensing)
Voltage supply U
B+
DC 17 ... 30 V
Power consumption
GDT-20: max. 0.5 W
GDHT-20: max. 3 W
Electrical connection
Circular connector M12 x 1 (5-pin)
Modbus
RTU via RS-485 interface
Ingress protection
IP 65, only when plugged in and using mating connectors with the corresponding ingress
protection
Weight
approx. 0.40 kg
EMC directive
2004/108/EC, EN 61326 emission (group 1, class B) and interference immunity (industrial
application)
EMC tests
■
Interference immunity per IEC 61000-4-3: 30 V/m (80 MHz ... 2.7 GHz)
■
Burst per IEC 61000-4-4: 4 kV
■
ESD per IEC 61000-4-2: 8 kV/15 kV, contact/air
