User manual

User Manual 2253i / 2253iX
SAFETY SUMMARY
This power source contains high voltage and current circuits, which are potentially lethal. Because
of its weight, proper placement on a work surface or installation in a cabinet must be ensured. The
following safety guidelines must be followed when operating or servicing this equipment. These
guidelines are not a substitute for vigilance and common sense. California Instruments assumes no
liability for the customer’s failure to comply with these requirements. If the power source is used in
a manner not specified by California Instruments, the protection provided by the equipment may be
impaired.
BEFORE APPLYING POWER
1. Verify the correct input voltage is applied to the unit. Allowable input ratings are shown on the model
and serial number tag located at the rear of the unit. The selected input voltage setting is visible on the
voltage selector slide switch on the rear panel of the unit.
2. The chassis and cabinet of this power source must be grounded to minimize shock hazard. A chassis
ground is provided at the input terminal block. This is located on the rear panel of the unit. The
chassis ground must be connected to an electrical ground through an insulated wire of sufficient
gauge.
FUSES
Use only fuses of the specified current, voltage, and protection speed (slow blow, normal blow, fast blow)
rating. Do not short out the fuse holder or use a repaired fuse.
DO NOT OPERATE IN A VOLATILE ATMOSPHERE
Do not operate the power source in the presence of flammable gases or fumes.
DO NOT TOUCH ENERGIZED CIRCUITS
Disconnect the power cable before servicing this equipment. Even with the power cable disconnected, high
voltage can still exist on some circuits. Discharge these voltages before servicing. Only qualified service
personnel may remove covers, replace components or make adjustments.
DO NOT SERVICE ALONE
Do not remove covers, replace components, or make adjustments unless another person, who can
administer first aid, is present.
DO NOT EXCEED INPUT RATINGS
Do not exceed the rated input voltage or frequency. Additional hazards may be introduced because of
component failure or improper operation.
DO NOT MODIFY INSTRUMENT OR SUBSTITUTE PARTS
Do not modify this instrument or substitute any parts. Additional hazards may be introduced because of
component failure or improper operation.
MOVING THE POWER SOURCE
When moving the power source, observe the following:
1. Remove all AC power to unit.
2. Do not carry unit using front panel handles. Handles are intended for pulling power source out of cabinet
only. Support unit at bottom when moving.
3. Do not lift alone. Two man lift recommended.
ALLOW CAPACITORS TO DISCHARGE
Capacitors in the power source may hold a hazardous electrical charge even if the power source has been
disconnected from the mains supply. Allow capacitors to discharge to a safe voltage before servicing internal
circuits or touching exposed pins of the mains supply connectors.
California Instruments 3