Switch-On After Sensor Replacement - Dräger Polytron SE Ex PR NPT1 DD Instructions For Use Manual

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
2

Switch-on after Sensor Replacement

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
Service using a special tool.
1
2
3
4
PE
2
WARNING
NOTICE
WARNING
1