5520A
Operators Manual
2-8
2-8. Placement and Rack Mounting
You may place the calibrator on a bench top or mount it in a standard-width, 24-inch
(61-cm) deep equipment rack. For bench-top use, the calibrator is equipped with non-
slipping, non-marring feet. To mount the calibrator in an equipment rack, use the 5520A
Rack Mount Kit, Model Y5537. Instructions for rack mounting the calibrator are packed
with the rack mount kit.
2-9. Cooling Considerations
Warning
To avoid risk of injury, never operate or power the calibrator
without the fan filter in place.
Caution
Damage caused by overheating may occur if the area around
the air intake is restricted, the intake air is too warm, or the air
filter becomes clogged.
Baffles direct cooling air from the fan throughout the chassis to internally dissipate heat
during operation. The accuracy and dependability of all internal parts of the calibrator
are enhanced by maintaining the coolest possible internal temperature. You can lengthen
the life of the calibrator and enhance its performance by observing the following rules:
• The area around the air filter must be at least 3 inches from nearby walls or rack
enclosures.
• The exhaust perforations on the sides of the calibrator must be clear of obstructions.
• The air entering the instrument must be at room temperature: make sure the exhaust
air from another instrument is not directed into the fan inlet.
• Clean the air filter every 30 days or more frequently if the calibrator is operated in a
dusty environment. (See Chapter 7, “Maintenance” for instructions on cleaning the
air filter.)
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