Switch-On After Sensor Replacement - Dräger Polytron SE Ex PR M1 DD Gebrauchsanweisung

Sensing Heads Polytron SE Ex PR M
SE Ex LC M
3 DD
 After having
switched-off the volt-
age open the termi-
nal box of the sens-
ing head and remove
the upper section.
1 Disconnect the
sensor leads from
the terminals and
unscrew old sen-
sor.
2 Remove old sensor. Shorten sensor leads of the
new sensor adequately and nd cut-off the isolation
by approx. 8 to 10 mm. Use ferrules enclosed.
3 Screw in new sensor and secure it against self-
loosening e.g. with Loctite No. 221.
To maintain the ingress protection IP 66 and for rea-
sons of explosion protection observe that the sensor's
O-ring is tightly fitted.
4 Connect sensor leads to terminals:
Terminal 1 – brown lead
Terminal 2 – yellow lead
Terminal 3 – black lead
 Close the terminal box ensuring it is dust free.
Sensing Heads Polytron SE Ex PR NPT1 DD and
SE Ex LC NPT1 DD
 After having
switched-off the volt-
age open the termi-
nal box of the sens-
ing head and remove
the upper section.
1 Disconnect the
sensor leads from
the terminals 1, 2
and 3.
2 Unscrew and re-
move old sensor. Cut-off sensor connector, short-
en the sensor leads adequately and cut-off the
insulation by approx. 8 to 10 mm. Use ferrules en-
closed.
Screw the new sensor tightly into the port. Five
threads must be engaged to ensure the type of
protection "d".
3 Connect sensor leads to terminals:
Terminal 1 – brown lead
Terminal 2 – yellow lead
Terminal 3 – black lead
Terminal 4 (if existing) is not connected
 Close the terminal box while considering the relevant
explosion protection rules. Ensure the housing is
free of dust and lock the headless screw of the cover.
40
DD and
3
1
2
WARNING
1
2
Sensing Head Polytron SE Ex HT M
 After having
switched-off the volt-
age open the termi-
nal box of the sens-
4
ing head and remove
3
2
the upper section.
1
1 Disconnect the
sensor leads from
the terminals 1, 2,
and 3.
2 Remove old sen-
sor and replace it by a new sensor. Shorten the
sensor cables adequately and cut-off the isolation
by approx. 8 to 10 mm. Use ferrules enclosed.
3 Screw in new sensor and secure it against self-
loosening e.g. with Loctite No. 221.
To maintain the ingress protection IP 66 and for rea-
sons of explosion protection observe that the sensor's
silicone gasket is tightly fitted.
4 Connect sensor leads to terminals:
Terminal 1 – brown lead
Terminal 2 – yellow lead
Terminal 3 – black lead
Terminal 4 (if existing) is not connected
 Securely fit the cover to the body of the enclosure
and tighten the cover fixing screws by a torque of
3.5 Nm.
Make sure the enclosure is free of dust and the sili-
cone gasket is secured between the body and the
cover.
4
3

Switch-on after Sensor Replacement

2
1
 Switch on power of the controller resp. insert the cor-
responding channel module.
Observe warm-up time of the new sensor of at least
30 minutes.
 Start the calibration procedure, page 37 - after each
sensor replacement.
For reasons of explosion protection the DrägerSensor
of the sensing heads Polytron SE Ex LC M1/2/3 DD
and Polytron SE Ex LC NPT1 DD is only allowed to be
disassembled (opened and closed) by the Dräger Ser-
vice using a special tool.
1
2
3
4
PE
2
WARNING
NOTICE
WARNING
1