Keithley 3761 User Manual

Also see for 3761: Firmware release notes

Contents

Keithley 3761 User Manual Manual pdf 4 page image

For safety, instruments and accessories must be used in accordance with the operating instructions. If the instruments oraccessories are used in a manner not specified in the operating instructions, the protection provided by the equipment may beimpaired.Do not exceed the maximum signal levels of the instruments and accessories. Maximum signal levels are defined in thespecifications and operating information and shown on the instrument panels, test fixture panels, and switching cards.When fuses are used in a product, replace with the same type and rating for continued protection against fire hazard.Chassis connections must only be used as shield connections for measuring circuits, NOT as protective earth (safety ground)connections.If you are using a test fixture, keep the lid closed while power is applied to the device under test. Safe operation requires the useof a lid interlock.If a screw is present, connect it to protective earth (safety ground) using the wire recommended in the user documentation.The symbol on an instrument means caution, risk of hazard. The user must refer to the operating instructions located in theuser documentation in all cases where the symbol is marked on the instrument.The symbol on an instrument means warning, risk of electric shock. Use standard safety precautions to avoid personalcontact with these voltages.The symbol on an instrument shows that the surface may be hot. Avoid personal contact to prevent burns.The symbol indicates a connection terminal to the equipment frame.If this symbol is on a product, it indicates that mercury is present in the display lamp. Please note that the lamp must beproperly disposed of according to federal, state, and local laws.The WARNING heading in the user documentation explains hazards that might result in personal injury or death. Always readthe associated information very carefully before performing the indicated procedure.The CAUTION heading in the user documentation explains hazards that could damage the instrument. Such damage mayinvalidate the warranty.The CAUTION heading with the symbol in the user documentation explains hazards that could result in moderate or minorinjury or damage the instrument. Always read the associated information very carefully before performing the indicatedprocedure. Damage to the instrument may invalidate the warranty.Instrumentation and accessories shall not be connected to humans.Before performing any maintenance, disconnect the line cord and all test cables.To maintain protection from electric shock and fire, replacement components in mains circuits — including the powertransformer, test leads, and input jacks — must be purchased from Keithley. Standard fuses with applicable national safetyapprovals may be used if the rating and type are the same. The detachable mains power cord provided with the instrument mayonly be replaced with a similarly rated power cord. Other components that are not safety-related may be purchased from othersuppliers as long as they are equivalent to the original component (note that selected parts should be purchased only throughKeithley to maintain accuracy and functionality of the product). If you are unsure about the applicability of a replacementcomponent, call a Keithley office for information.Unless otherwise noted in product-specific literature, Keithley instruments are designed to operate indoors only, in the followingenvironment: Altitude at or below 2,000 m (6,562 ft); temperature 0 °C to 50 °C (32 °F to 122 °F); and pollution degree 1 or 2.To clean an instrument, use a cloth dampened with deionized water or mild, water-based cleaner. Clean the exterior of theinstrument only. Do not apply cleaner directly to the instrument or allow liquids to enter or spill on the instrument. Products thatconsist of a circuit board with no case or chassis (e.g., a data acquisition board for installation into a computer) should neverrequire cleaning if handled according to instructions. If the board becomes contaminated and operation is affected, the boardshould be returned to the factory for proper cleaning/servicing.Safety precaution revision as of June 2017.