Safety Instructions; Risks Of Explosions; Labeling; Figure 3 Risk Of Explosion - Nokia 9500 MPR User Manual

Release 7.0.0 3DB 19286 ACAA Issue 01
Safety awareness
1.3.1.2
Danger:
Carefully observe the specific procedures for installation / turn-up and commissioning /
maintenance of equipment parts where D.C. power is present, described in the relevant
installation / turn-up and commissioning / maintenance documents and the following
general rules:
•Personal injury can be caused by -48VDC. Avoid touching powered terminals with any
exposed part of your body.
•Short circuiting, low-voltage, low-impedance, DC circuits can cause severe arcing that can
result in burns and/or eye damage. Remove rings, watches, and other metal jewelry before
working with primary circuits. Exercise caution to avoid shorting power input terminals.

1.3.2 Risks of explosions

1.3.2.1
This risk is present when batteries are used, and it is signaled by the label in
Figure 3 Risk of explosion
1.3.2.2
Therefore, slits or apertures are made to let air circulate freely and allow dangerous
gases to down flow (battery-emitted hydrogen). A 417-IEC-5641 Norm. compliant
label, as shown in
be covered up.
50

Safety instructions:

Labeling:

Safety instructions:
Figure 4, is affixed next to it indicating that the openings must not
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Figure 3: