SICK DUSTHUNTER SP100 Ex-2K, Руководство по эксплуатации, Страница: 96 / 130

96 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
12
MAINTENANCE
12.6.2 Checking laser alignment
To be done: As required.
Ex-condition: Check must be performed outside the Ex-area.
24 V DC power supply must be available 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.
7
Place the enclosure rear side of the sender/receiver unit on a flat surface.
8
Loosen both screws (SW 7) of the cover and remove the cover.
9
Switch the sender/receiver unit power supply on.
10
Check the alignment of the light trap with a suitable object or finger, as shown in the
following Figure, the laser must be exactly in the middle.
11
Disconnect the sender/receiver unit from the power supply.
12
If necessary, adjust the alignment ( see “Setting the laser alignment”, page 112 ).
13
Fit the cover and tighten the screws (2 Nm).
14
Bring the sender/receiver unit to the measuring location.
15
Fit the purge gas hose and switch on the purge gas supply.
16
Fit the sender/receiver unit on the duct. Tighten the four flange screws with a torque of
20 Nm.
17
Plug the female connector into the male connector.
18
Slide the coupling sleeve over the receiving bushing and screw on.
19
Tighten the securing screw of the Ex-Plug-Connector with 3 Nm, the coupling sleeve may
have to be turned back a little bit for this purpose.
20
Put the complete device back into operation (connect potential equalization, switch on
voltage and check measured and status values).
Fig. 49: Checking laser alignment