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WIKA operating instructions, model GDM-100-T
EN
14535893.01 01/2022 EN/DE
3. Safety
3.1 Explanation of symbols
WARNING!
... indicates a potentially dangerous situation that can result in serious
injury or death, if not avoided.
CAUTION!
... indicates a potentially dangerous situation that can result in light injuries
or damage to property or the environment, if not avoided.
Information
... points out useful tips, recommendations and information for efficient
and trouble-free operation.
3.2 Intended use
Wherever the gas density of SF
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gas must be indicated locally and, at the same time,
circuits need to be switched, the model GDM-100-T hybrid gas density monitor finds its
use.
The integrated or attached digital transmitter transmits the parameters of gas density,
pressure and temperature as electrical signals via a Modbus
®
RTU protocol.
The integrated or attached analogue transmitter transmits the absolute pressure refer-
enced to 20 °C or the gas density in g/l for SF
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gas as a 4 ... 20 mA signal.
Gas density monitors are modified contact pressure gauges, specially developed for the
use of SF
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gas. Temperature influences acting on the enclosed SF
6
gas are compensat-
ed by a compensation system.
The gas density monitors are specially designed for the respective application in switch-
gear (pure SF₆ gas, gas mixtures, calibration pressure, switch points ...). Before use,
check whether this instrument is suitable for the intended application.
Only use the instrument in applications that lie within its technical performance limits
(e.g. max. ambient temperature, material compatibility, ...).
→ For performance limits, see chapter 9 “Specifications”.
This instrument is not permitted to be used in hazardous areas!
The instrument has been designed and built solely for the intended use described here,
and may only be used accordingly.
3. Safety
