Dräger Polytron 3000, Инструкция по эксплуатации

Страница: 6 / 68

Installing the transmitter
6
Installing the transmitter
Preparing for installation
The performance and effectiveness of the entire system depends essentially on the
position chosen for installing the transmitter.
The following should be noted during installation:
— Local requirements and regulations governing the installation of gas measuring
systems.
— Relevant regulations concerning the connection and routing of electric power
supply and signal lines.
— The full scope of environmental factors to which the transmitter may be exposed
(ambient conditions: see Technical data, page 19).
— Physical properties of the gas to be measured:
For gases with a density lower than that of air, the transmitter must be lo-
cated above any possible leak or at the highest point at which large concen-
trations of gas may occur.
For gases and vapours with a density greater than that of air, the transmitter
must be located below a possible leak or at the lowest point at which such
gases and vapours may occur.
— The specific uses (e.g. possible leaks, ventilation conditions, etc.).
— Accessibility for the necessary maintenance work (see Installation instructions
for the Polytron docking station).
— All other factors and conditions which could have a negative effect on the instal-
lation and operation of the system (such as vibrations or varying temperatures).
— We recommend installing a reflective shield if the unit is exposed to strong sun-
light.
— The transmitter must be installed vertically (sensor facing downwards).
— The transmitter has been tested with regard to its weather-resistance and may
be installed out of doors. Use of a splash guard is recommended to protect the
sensor from splashing water, dust and wind.
The Dräger Polytron 3000 transmitter consists of two main components:
— Dräger docking station
This can be pre-installed anywhere and contains the electrical installation com-
ponents.
— The measuring unit Dräger Polytron 3000
contains the electronics of the transmitter.
If the measuring unit is not fitted immediately after installing the docking station, the
latter should be covered with the raincover provided (dust and water protection) to
protect against dust and splashing water.
NOTE
In explosion-hazard areas:
Observe the national regulations concerning electrical equipment in
explosion-hazard areas.