Hach-Lange SC 60 - Manual (Page 43)

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Section 5 Maintenance
DANGER
Only qualified personnel should conduct the tasks described
in this section of the manual.
DANGER
Explosion hazard. Do not connect or disconnect equipment
unless power has been switched off or the area is known to be
non-hazardous.
5.1 Cleaning the Controller
With the enclosure securely closed, wipe the exterior with a
damp cloth.
5.2 Fuse Replacement
The instrument contains two mains fuses. Failed fuses are an
indication that an equipment problem could exist. Problem
resolution and fuse replacement should be performed only by
qualified service personnel. Refer to
Figure 24on page 40 and the
following steps to replace the fuses:
1. Disconnect power to the controller (including power to relays
and other components, if powered).
2. Open the hinged controller cover by completely loosening all
four captive screws in the cover.
3. Remove the high voltage barrier; pull out the lever of the
captive fastener then pull straight out on the barrier. Set the
barrier aside for reinstallation.
4. Remove the fuses and install new fuses of the same type and
rating:
• AC powered sc60: T, 1.6 A, 250 V, slow blow
• 24 V DC powered sc60: T, 3 A, 250V, slow blow
5. Reinstall the high voltage barrier.
6. Close the controller cover and hand-tighten the four screws.
7. Reconnect power to the instrument.