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Instruction Manual
ExTox Transmitter ExSens(-I) and Sens(-I)
5
Installation and Initial Operation
Mechanical Installation
5.1
The ExSens(-I) is mounted with in maximum three screws (max.
wall whereas the Sens(-I) is mounted with only two screws (max.
and wall plugs for fixing Sens(-I) are part of delivery. The fixing screws for the
Sens(-I) are only accessible when the cover is opened. A drilling jig for all transmit-
ter types is available on the Internet Homepage for download.
By means of a fixing square – being available as accessory – the transmitter could
be mounted on the ceiling. An adapter for measurement in pipes is also available.
When mounting the transmitter it has to be ensured that the transmitter remains
accessible for maintenance. Especially the calibration adapter has to be put upon
the sensor element. Therefore it is necessary to keep a distance of min. 10 cm be-
tween sensor gas inlet and other fixtures.
Please protect the gas inlet of the transmitter against direct shower and beam wa-
ter, for example by means of a weather proof housing.
In both Transmitter Series the housing can be opened by removing the cover. If the
transmitter is mounted in hazardous areas please follow the instructions in Chapter
0.
For opening the ExSens(-I) the interlock of the cover has to be loosened first by
unscrewing the hexagon socket screw. Then the cover could be opened. The two
elevations support the use of an open-ended wrench or a screw driver shaft to open
the housing. When closing the housing the cover simply has to be turned off by
hand as far as it will go. Then the cover is turned back only as far as the interlock
screw fits in one of the depressions of the housing.
The cover of the Sens(-I) can be taken off after loosening the four screws of the
cover.
Electrical Installation
5.2
Installation is only to be done by qualified personnel keeping the respective instal-
lation regulations. For use in hazardous areas the hints in Chapter 0 have to be
kept additionally.
Selection of Cable and Wiring
5.2.1
The connection of the transmitter is done via a double shielded line. For the ExSens
and Sens it has to be a 3- or 4-wire line, for the ExSens-I and Sens-I it has to be a
5- or 6-wire line. The 6-wire and 4-wire line respectively are necessary in case the
connection to ground cannot be done directly at place of installation of the trans-
mitter. The sixth and four wire of the line have to be worked out as PE.
The types ExSens-I and Sens-I can if necessary also be used with 3- or 4-wire line.
The RS 485-Interface remains in this case disconnected. The features and the op-
eration correspond then to the types ExSens and Sens.
The ExTox-Transmitter-Cable disposes of the described features and is suitable for
use in hazardous areas.
The wire cross-section and the corresponding line resistance determine the maxi-
mum distance between transmitter and control unit ( DB). The outer diameter of
the cable has to be between 6 und 12 mm for the cable gland of the ExSens-I, be-
tween 4 and 8.5 mm for the ExSens and between 5 und 9 mm for the Sens(-I).
8 mm) on the
4 mm). Screws
Page 13 of 20
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