SICK DUSTHUNTER SP100 Ex-3K, Руководство по эксплуатации

Страница: 103 / 140

103 8020216/19YN/V3-0/2020-12| SICK O P E R A T I N G I N S T R U C T I O N S | DUSTHUNTER SP100 Ex-3K
Subject to change without notice
MAINTENANCE
12
12.6.2 Replacing the protection tube O-ring
Replacement criterion: In case of damage.
Ex-condition: Replacement can be carried out in the Ex-area when the absence
of an explosive atmosphere has been verified with a gas warning
device.
Work steps:
1
Disconnect the entire device (control unit and sender/receiver unit) from the power
supply.
2
Disconnect the potential equalization line, if necessary.
3
Loosen the flange screws. Remove the sender/receiver unit from the duct. If necessary,
allow to cool down.
4
Place the enclosure rear side of the sender/receiver unit on a flat surface.
5
Switch off the purge gas supply.
6
Loosen both screws ( see Fig. 58
à
) (SW 7) of the hood ( see Fig. 58

). Remove the
hood.
7
Loosen the six protection tube screws ( see Fig. 58
â
). Turn the protection tube lightly
and pull it off upwards.
8
Position a suitable tool (e.g. small screwdriver) under the “top” O-ring ( see Fig. 58

).
Remove it from the groove - lightly rub the new O-ring with silicone grease. Put this back
in the groove.
9
Position a suitable tool (e.g. small screwdriver) under the “bottom” O-ring ( see Fig. 58

). Remove it from the groove - lightly rub the new O-ring with silicone grease and lay it
in the groove.
10
Refit the probe protection tube. Fasten with the six protection tube screws (torque
5 Nm).
11
Replace the hood and fasten it again with the two screws (torque 2 Nm)
12
Switch on the purge gas supply.
13
Fit the sender/receiver unit on the duct flange (torque 20 Nm).
14
Connect the potential equalization line.
15
Put the complete device back into operation (switch on voltage and check measured and
status values).
12.6.3 Replacing the seal in the cleaning opening
Replacement criterion: As required (manufacturer recommendation).
Ex-condition: Replacement can be carried out in the Ex-area when the absence
of an explosive atmosphere has been verified with a gas warning
device.
Work steps:
1
Disconnect the entire device (control unit and sender/receiver unit) from the power
supply.
2
Disconnect the potential equalization line, if necessary.
3
Using an Allen key (SW 12), unscrew screw ( see Fig. 58

) on the cleaning opening in an
anti-clockwise direction (caution: Hot, aggressive and explosive gases may escape; the
measuring probe may be hot).
4
Replace old sealing ring ( see Fig. 58

) with a new one.
5
Retighten the screw (torque 30 Nm).
6
Connect the potential equalization line.
7
Put the complete device back into operation (switch on voltage and check measured and
status values).