5
14063434.02 10/2019 EN/DE
WIKA operating instructions transmitter, models GDT-20, GDHT-20
EN
1. General information / 2. Safety
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 equipment or the environment, if not avoided.
Information
... points out useful tips, recommendations and information for efficient and
trouble-free operation.
2. Safety
WARNING!
Before installation, commissioning and operation, ensure that the appropriate
transmitter in terms of measuring range, design and specific measuring condi
-
tions, has been selected.
Non-observance can result in serious injury and/or damage to the equipment.
Further important safety instructions can be found in the individual chapters of
these operating instructions.
2.1 Intended use
These transmitters are designed for use at SF
6
gas-filled systems. There, the state variables
pressure, temperature and humidity (only model GDHT-20) are measured permanently. From
these, the transmitter calculates the values gas density and dew point/frost point (only model
GDHT-20) information of the SF
6
gas in order to evaluate the state of the system. All stated
parameters can be read from the Modbus
protocol via the RS-485 interface. The model
GDT-20 or GDHT-20 transmitters are therefore used for permanently monitoring the stated
status parameters in SF
6
gas tanks.
The instrument has been designed and built solely for the intended use described here, and
may only be used accordingly.
The technical specifications contained in these operating instructions must be observed.
Improper handling or operation of the instrument outside of its technical specifications
requires the instrument to be taken out of service immediately and inspected by an authorised
WIKA service engineer.
The manufacturer shall not be liable for claims of any type based on operation contrary to the
intended use.
