Part
12470
Rev. 2 3/25/99
21
SECTION IV
SERVICE DATA
The test set utilizes straightforward circuits and components which require little or no service except
for routine cleaning, tightening of connections, etc. The test set should be serviced in a clean
atmosphere away from energized electrical circuits. The following maintenance is recommended:
Maintenance intervals depend on usage, but a maximum of every six months is recommended.
WARNING
Do not service unit unless it is disconnected from its power source.
1.
Enclosure:
The enclosure can be cleaned with a soft cloth. If heavily soiled, the cloth can be dampened
with an approved solvent that does not attack the finish or leave residue.
2.
Control Panel:
The control panel can be wiped clean with a soft, dry cloth. Do not wipe the meter lenses
with a cloth. If a breath of air will not remove dirt, brush it away lightly with a soft bristle
instrument brush.
3.
Variable Auto transformer:
The brushes are designed for long life, but should be checked periodically for excessive wear
or chipping. The brushes must be changed before the brass brush holder touches the contact
surface or serious damage will result. The brush contact area of the winding should be
inspected for burning, pitting, dirt or debris. If necessary, burnish surface with burnishing
tool, remove filings and clean surface with a swab moistened with alcohol (100% solution).
