Technical Manual
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Dräger Polytron
®
8000 Series
11
Safety-related information
– The instrument may be equipped with a dust plug at the conduit entry. This plug
is not explosion proof nor meant to be watertight, and must be removed before
connecting the instrument to a sealed conduit or installation of a flameproof
cable gland.
– Unused openings must be closed with a plug. For correct tightening torques of
conduit hubs, cable glands, plugs and sensor see 17.7 Tightening torque.
– For non-conduit installations, an approved cable gland must be used (e.g.
Hawke A501/421/A/¾” NPT or equivalent)
–
WARNING:
Only for conduit installations: To reduce the risk of Ignition of
Hazardous Atmospheres, the conduit must be sealed within 45 cm (18") of the
enclosure.
– The flameproof / explosion proof joints are not in accordance with the relevant
minimum or maximum values of EN/IEC 60079-1. The joints are not intended to
be re-worked by the user.
To increase the safety of the instrument, the values are designed to be safer
than specified in EN/IEC 60079-1. E. g. the width of the flameproof joint is longer
than the required minimum values and the gap of the flameproof joint is smaller
than the required maximum values.
Polytron
®
8100 EC-specific:
– Recommended sensor orientation: downwards (As shown in figures C and E on
the fold-out page).
Polytron
®
8200 CAT-specific:
– Preferred orientation of the sensor: downwards. If the sensor inlet is secure from
mechanical damage, dirt and water ingress, any other orientation is permissible.
– For CSA-conform operations only:
The use of the optional splash guard (6812510) is mandatory to comply with
CSA approvals.
Polytron
®
87x0 IR-specific:
– Preferred orientation of the Dräger PIR 7x00 sensor must be observed (See
figure F on the fold-out page). Larger deviations and the use of the pre-installed
splash guard will increase the response time (see Instructions for Use for PIR
7x00).
– Any other orientation is only permissible if the PIR 7x00 is used without splash
guard, e.g. for applications in ducts. If installed in a duct, there is an increased
risk of deposits building up on the optical surfaces.
– The use of the pre-installed splash guard is recommended to protect the sensor
from water and dust.
– If the pre-installed splash guard (part number 6811911 or 6811912) is used, it
must be ensured that the status indicator lights are in a vertical line and the
Dräger logo of the splash guard must be horizontal. A maximum deviation of ±10
degree from the horizontal position is permissible.
– Liquids and/or build up of deposits on the optical surfaces of the PIR 7x00 may
result in a warning or fault.
– For the explosion proof version it is recommended to use a spacer (part number
6812617) when the instrument is mounted on a wall or to a level structure.
