Replacing Spare Parts; Replacing Fuses - Siemens ULTRAMAT 23 Series Equipment Manual

Service and maintenance
10.2 Maintenance work
10.2.3

Replacing spare parts

Incorrect fitting of replacement parts
Special work is required when replacing spare parts, especially on the IR analyzer unit, which
can only be carried out by a Siemens certified service center or by qualified, specially trained
personnel.
Incorrect interventions can result in a reduction in measuring accuracy or malfunctioning of
the analyzer.
To maintain the measuring accuracy of the ULTRAMAT 23, it may be necessary to carry out a
temperature compensation following the replacement of certain parts. Parts to which this
statement apply are identified in the spare parts list (see ) by "*".
This particularly applies if brief temperature fluctuations > 5 °C (41 °F) occur at the installation
location. This temperature dependence will not occur if you activate a cyclic AUTOCAL of e.g.
3 hours.
We recommend having temperature compensation performed by a Siemens certified service
center.
10.2.4

Replacing fuses

Explosion hazard
If a flammable or ignitable atmosphere exists, plugs must never be disconnected or lamps/
fuses replaced when the analyzer is supplied with power.
• Make sure when replacing fuses that an explosive atmosphere is not present (fire permit)!
To replace the fuses, proceed as follows:
1. Remove the fuse holder above the appliance plug.
Use a small screwdriver to do this.
2. Remove the blown fuse from the holder.
3. Insert a new fuse.
4. Insert the fuse holder into the compartment again.
Note
Only fuses of the type printed on the rear of the analyzer may be used (see also
section Electronics (Page 194)).
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CAUTION
DANGER
Equipment Manual, 04/2022, A5E37100388-012
ULTRAMAT 23