Keithley 7158 901 01B free download

File name 7158_901_01B.pdf

Model 7158 low Current Scanner Card Instruction Manual Contains Operating and Servicing Information Model 7158 Low Current Scanner Card Instruction Manual 0 1987, Keithley Instruments, Inc. Test Instrumentation Group All rights reserved. Cleveland, Ohio, U.S.A. June 1990, Second Printing Document Number: 7158-901-01 Rev. B SAFETY PRECAUTIONS The following safety precautions should be observed before using this product and any associated instrumentation. Although 6ome instruments and accessories would normally be used with non-hazardous voltages, there are situations where hazardous conditions may be present. This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury. Read the operating information carefully before us- ing the product. Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable connector jacks or test fixtures. The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than 30V RMS, 42.4V peak, or 60VDC are present. A good safety practice is to expect that hazardous voltage is present in any unknown circuit before measuring. Before operating an instrument, make sure the line cord is connected to a properly grounded power receptacle. Inspect the connecting cables, test leads, and jumpers for possible wear, cracks, or breaks before each we. For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under test. ALWAYS re- move power from the entire test system and discharge any capacitors be- fore: connecting or disconnecting cables or jumpers, installing or removing switching cards, or making internal changes, such as installing or removing jumpers. Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth) ground. Always make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the voltage being measured. Do not exceed the maximum signal levels of the instruments and awes- series, as defined in the specifications and operating information, and as shown on the instrument or test fixture rear panel, or switching card. Do not connect switching cards directly to unlimited power circuits. They are intended to be used with impedance limited sources. NEVER connect switching cards directly to AC main. When connecting sources to switch- ing cards, install protective devices to limit fault current and voltage to the card. When fuses are used in a product, replace with same type and rating for continued protection against fire hazard. Chass