SICK DUSTHUNTER SP100 Ex-2K, Operating Instructions Manual, Page: 99 / 130

99 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
12.6.7 Exchanging the flange seal
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 the four flange screws and remove the sender/receiver unit from the duct
(Caution: hot, aggressive and explosive gases may escape; the measuring probe may be
hot) and allow it to cool down if necessary.
3
Replace the old flange seal (7047036) with a new one.
4
Fit the sender/receiver unit back on the duct flange (torque 20 Nm).
5
Put the complete device back into operation (connect potential equalization, switch on
voltage and check measured and status values).
12.6.8 Replace potential equalization screw
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
Unscrew the four flange screws and remove the sender/receiver unit from the duct
(Caution: hot, aggressive and explosive gases may escape; the measuring probe may be
hot) and allow it to cool down if necessary.
3
Loosen the grounding screw and replace all parts of the set ( see “Device views for
sender/receiver unit maintenance”, page 95 , view 4) with new parts.
4
Fit the sender/receiver unit back on the duct flange (torque 20 Nm).
5
Put the complete device back into operation (connect potential equalization, switch on
voltage and check measured and status values).
12.6.9 Exchanging the enclosure cover O-ring
Exchange criterion: In case of damage.
Ex-condition: Exchange must be performed outside the Ex-area.
Work steps:
1
Disconnect the entire device (control unit and sender/receiver unit) from the power
supply. Disconnect the potential equalization line.
2
Unscrew the four flange screws and remove the sender/receiver unit from the duct
(Caution: hot, aggressive and explosive gases may escape; the measuring probe may be
hot) and allow it to cool down if necessary.
3
Switch off the purge gas supply. Remove the purge gas hose.
4
Unscrew screw 5328477 ( see “Device views for sender/receiver unit maintenance”,
page 95 , views 1 and 2) until you can unscrew the coupling sleeve by turning it to the left
and remove it downwards.
5
Remove the socket ( see “Device views for sender/receiver unit maintenance”, page 95 ,
view 3) from the connector plug.
6
Move the sender/receiver unit to an Ex-free zone.