Keithley 197A-901-01 (C - Feb 2001)(Users) free download

File name 197A-901-01 (C - Feb 2001)(Users).pdf

Model 197A AutorangingMicrovolt DMM User'sManual MY A GREATER MEASURE:~OF CONFIDENCE Model 197AAutoranging Microvolt DMM User's Manual 01990, Keithley Instruments, Inc. All rights reserved. Cleveland, Ohio, U.S.A. Third Printing, February 2001 Document Number: 197A-901.01 Rev. C SAFETY PRECAUTIONS The following safety precautions should be observed before operating the Model 197A. This instrument is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury. Read over the manual carefully before operating this instrument. Exercise extreme caution when a shock hazard is present at the instrument's input. The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than 30V ms or 424V peak are present. A good safety practice is to expect that a hazardous voltage is present in any unknown circuit before measuring. Inspect the test leads for possible wear, cracks or breaks before each use. If any defects are found, replace the test leads. For optimum safety do not touch the test leads or the instrument while power is applied to the circuit under test. Turn the power off and discharge all capacitors, before connecting or disconnecting the instrument. Do not touch any object which could provide a current path to the cmnmon 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 with- standing the voltage being measured. Exercise extreme safety when testing high energy power circuits (AC line or mains, etc). Refer to High Energy Circuit Safety Precautions found in paragraph 2.2. Do not exceed the instrument's maximum allowable input as defined in the specifications and operation section. Instrumentation and accessories should not be connected to humans. Safety Precautions The following safety precautions should be observed before using Exercise extreme caution when a shock hazard is present. Lethal this product and any associated instrumentation. Although some in- voltage may be present on cable connector jacks or test fixtures. The struments and accessories would normally be used with non-haz- American National Standards Institute (ANSI) states that a shock ardous voltages, there are situations whcrc hazardous conditions hazard exists when voltage levels greater than 30V RMS, 42.4V may be present. peak, or 60VDC are present. A good safety practice is to expect This product is intended for use by qualified personnel who recog- that hazardous