SICK DUSTHUNTER SP100 Ex-3K, Руководство по эксплуатации

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105 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
12.6.6 Replacing the potential equalization screw
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 and remove the sender/receiver unit from the duct and allow it
to cool down, if necessary.
4
Loosen potential equalization screw ( see Fig. 59

) and replace all parts of the set with
new ones.
5
Fit the sender/receiver unit back on the duct flange (torque 20 Nm).
6
Connect the potential equalization line.
7
Put the complete device back into operation (switch on voltage and check measured and
status values).
12.6.7 Replacing the protection tube
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. Allow to cool
down, if necessary.
4
Place the enclosure rear side of the sender/receiver unit on a flat surface.
5
Switch off purge gas supply, if necessary.
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
Visually inspect O-rings ( see Fig. 58

,

) at this opportunity and replace if there is any
visible wear or damage ( see “Replacing the protection tube O-ring”, page 103 ).
9
Fit a new probe protection tube. Fasten with the six protection tube screws (torque 5
Nm).
10
Replace the hood and fasten it again with the two screws (torque 2 Nm)
11
Switch on the purge gas supply.
12
Fit the sender/receiver unit on the duct flange (torque 20 Nm).
13
Connect the potential equalization line.
14
Put the complete device back into operation (switch on voltage and check measured and
status values).