97
8024493/AE00/V1-0/2020-09| 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-2K
Subject to change without notice
MAINTENANCE
12
12.6.3
Exchanging the protection tube O-ring
Exchange criterion: In case of damage.
Ex-condition:
Replacement can be carried out in the Ex-area when the absence of a
potentially 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. Disconnect the potential equalization line.
2
Loosen the four flange screws. Remove the sender/receiver unit from the duct. Allow to
cool down.
3
Switch off the purge gas supply.
4
Place the enclosure rear side of the sender/receiver unit on a flat surface.
5
Loosen both screws (SW 7) of the protective hood. Remove the protective hood.
6
Loosen the four protection tube screws (PN 5340709). Turn the protection tube lightly
and pull it off upwards.
7
Position a suitable tool (e.g. small screwdriver) under the “top” O-ring (5329376).
Remove it from the groove - lightly rub the new O-ring with silicone grease. Put this back
in the groove.
8
Position a suitable tool (e.g. small screwdriver) under the “bottom” O-ring (5340711).
Remove it from the groove - lightly rub the new O-ring with silicone grease. Put this back
in the groove.
9
Refit the probe protection tube. Fasten with the four protection tube screws (torque
15 Nm).
10
Switch on the purge gas supply.
11
Fit the sender/receiver unit on the duct flange (torque 20 Nm).
12
Put the complete device back into operation (connect potential equalization, switch on
voltage and check measured and status values).
12.6.4
Exchanging the protection tube O-ring
Exchange criterion: Every 2 years (manufacturer's recommendation).
Ex-condition:
Replacement can be carried out in the Ex-area when the absence of a
potentially 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. Disconnect the potential equalization line.
2
Unscrew screw 5328477 until you can unscrew the coupling sleeve by turning it to the
left and remove it downwards.
3
Remove the female connector from the male connector.
4
Position a suitable tool (e.g. small screwdriver) under the “top” O-ring (5338626).
Remove it from the groove - lightly rub the new O-ring with silicone grease. Put this back
in the groove.
5
Position a suitable tool (e.g. small screwdriver) under the “bottom” O-ring (5338625).
Remove it from the groove - lightly rub the new O-ring with silicone grease. Put this back
in the groove.
6
Plug the female connector back into the male connector.
7
Screw the coupling sleeve on again so that the screw 5328477 can be screwed tight
between the teeth again.
8
Put the complete device back into operation (connect potential equalization, switch on
voltage and check measured and status values).