Metrohm 921 NIRS Vial Heater - Manual (Page 13)

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5
Maintenance and Fuse Replacement
5.1 Fuse type
Fuse Type: T5A-250
Location: AC input block on back panel
To open the fuse door, use a small flatbladed
screwdriver.
Note: A blown fuse may be an indication of an electrical fault of some sort, or may be caused by
electrical transients. Whenever replacing a blown fuse, always inspect the system for items like frayed
wires, damage, or unsafe conditions. If any of these conditions are present, they must be repaired
before use of the Vial Heater Module.
The international symbol for electrical potential indicates that electrical power
may be present if AC power is applied.
The international symbol for caution indicates that the user should be aware of
danger if instructions are not followed.
5.2 Fuse replacement
1. Turn Vial Heater Module off using the
front-panel switch.
2. Remove the AC power cord from the AC
input block.
3. Open the fuse door using a small flat-
bladed screwdriver as shown.
4. Lift out the old fuse and discard.
5. Insert the new fuse into the fuse clip and
snap in place by closing fuse door.
6. Reinstall the AC power cord and turn the
Vial Heater Module on.
7. Order a spare fuse immediately.
T5A-250 fuse inserts in plastic clip