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Model 3550 LCR Meter Instruction Manual Preparation for Use
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Use the Proper Fuse
To avoid fire hazard, use only the correct fuse type as specified for the AC power supply in the
“Preparation for Use”” or “Service” sections of this manual. Please note that the fuse rating for 100
& 120-volt operation is different than the rating for 200 & 240-volt operation. Information about
the proper fuse type is also printed on the rear panel of the instrument.
Refer fuse replacement to qualified service personnel.
Do Not Use in Explosive Environments
WARNING: The 3550 is not designed for operation in explosive environments.
Do not Operate Without Covers
WARNING:
This device should be operated with all panels and covers in place. Operation with
missing panels or covers could result in personal injury.
FOR QUALIFIED SERVICE PERSONNEL ONLY
Servicing Safety Summary:
Do Not Service Alone
Do not perform service or adjustment on this product unless another person capable of rendering
first aid is present.
Use Care When Servicing with Power On or Off
Dangerous voltages may exist at several points in this product. To avoid personal injury or
damage to this equipment, avoid touching exposed connections or components while the power is
on. Assure that the power is off by unplugging the instrument when removing panels, soldering, or
replacing components.
WARNING:
The instrument power source is electronically controlled meaning that there is power
present throughout the instrument even when the instrument is in the OFF state.
Always unplug the instrument and wait 5 minutes before accessing internal components.
Power Source
This product is intended to connect to a power source that will not apply more than 250V RMS
between the supply conductors or between either supply conductor and ground. A protective
ground connection by way of the grounding conductor in the power cord is essential for safe
operation.
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