SICK DUSTHUNTER SP100 Ex-3K, Руководство по эксплуатации

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119 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
TROUBLESHOOTING
13
13.6.2 Checking the laser beam for free passage
The laser beam must pass centrically through the aperture plate, readjust the aperture
plate when this is not the case with a correctly adjusted laser.
Criterion: As required
Ex-condition: Checking and setting the aperture plate can be carried out in the Ex-
area when the purge gas supply and potential equalization remain con-
nected and 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.
2
Loosen the flange screws. Remove the sender/receiver unit from the duct. If necessary,
allow to cool down.
3
Place the enclosure rear side of the sender/receiver unit on a flat surface.
4
Loosen both screws ( see Fig. 58, page 101
à
) (SW 7) of the hood ( see Fig. 58

).
5
Remove the hood.
6
Loosen the six protection tube screws ( see Fig. 58
â
). Turn the protection tube lightly
and pull it off upwards.
7
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 ).
8
Check the beam transmission as shown in the Figure ( see “Checking the beam path”,
page 119 ).
9
Readjust the aperture plate when necessary.
10
Remove existing deposits in the beam path on the aperture opening, the sintered metal
filter and on the outlet openings of the purge gas.
11
Refit the probe protection tube (torque 5 Nm).
12
Replace the cover and fasten it again (torque 2 Nm).
13
Switch on the purge gas supply.
14
Fit the sender/receiver unit on the duct flange (torque 20 Nm).
15
Connect the potential equalization line.
16
Put the complete device back into operation (switch on voltage and check measured and
status values).
Fig. 68: Checking the beam path
Aperture plate
Control cover
Sintered metal
filter
Outlet opening for
purge gas
Fastening screw Laser beam
Fastening screws