Installing accessories
36
5 Slide the measuring unit with pump module into the docking station and
lower it into position, see page 25.
6 Turn the eccentric catches clockwise with an Allen key to lock the measur-
ing unit ( = approx. 180
o
).
Installing the sensor and pump adapter
Unscrew the bayonet ring from the transmitter and remove the blanking
disc.
Place the sensor in the opening with the Dräger logo facing the front, and
push upwards gently until the connector engages.
1 Place the fastening ring over the sensor opening.
2 Secure the sensor with the bayonet ring.
The assembly direction of the pump adapter is determined by the gas flow
direction between pump and sensor:
— Connectors for intake and exhaust air point to the left, the symbol is vis-
ible from the front; the pump is positioned in front of the sensor in gas flow
direction; the sensor is positioned on the positive pressure side of the
pump. This is the preferred operating mode for all sensors.
— Connectors for intake and exhaust air point to the right, the symbol is
visible from the front; the pump is positioned behind the sensor in gas flow
direction; the sensor is positioned on the negative pressure side of the
pump. This operating mode should only be selected for special reasons.
Insert the pump adapter sleeves into the holes on the underside of the
docking station. The seal slides over the sensor.
1 Turn the securing ring clockwise until the pump adapter is secure.
Notes on installation of the inlet line
The material selected for the inlet hose or inlet pipe and the length of the inlet
line will affect the reaction time of the measured signal. In the worst cases,
reactions with the selected material, or absorption in this material, will prevent
a measurable gas concentration from reaching the sensor.
— Please contact your Dräger sales partner for choice on suitable selection of
tubing/hose.
— Maximum permissible pressure difference between flow inlet and the envi-
ronment of the transmitter: 50 mbar
CAUTION
This operating mode is not permissible for DrägerSensor O
2
LS (6809630)
and DrägerSensor O
2
(6809720)!
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