Keithley 660A(Model660A) free download

File name 660A(Model660A).pdf

INSTRUCTION MANUAL MODEL 660A GUARDED DC DIFFERENTIAL VOLTMETER WARRANTY We warrant each of our products to be free from defects in material and workmanship. Our obligation under this warranty is to repair or replace any instrument or part thereof (except tubes and batteries) which, within a year after shipment, proves defective upon examination. We will pay domestic surface freight costs. To exercise this warranty, call your local field representative or the factory, DDD 216. 795-2666. You will be given assistance and shipping instructions. REPAIRS AND RECALIBRATION Keithley Instruments maintains a complete re- pair service and standards laboratory in Cleve- land, and has an authorized field repair facility in Los Angeles. To insure prompt repair or recalibration serv- ice, please contact your local field representa- tkve or the plant directly before returning the instrument. Estimates for repairs, normal recalibrations, and calibrations traceable to the National Bureau of Standards are available upon request. MODEL 660A DIFFERENTIAL VOLTMETER CONTENTS TABLE OF CONTENTS Section Page Section Page 1. GENERAL DESCRIPTION ... 1 5-5. Adjusting Hum Bal Control . 19 5-6. Zener Diode Replacement . . 19 1-1. Description ... 1 5-7. Meter Adjustment . . . . . 19 1-2. Operating Modes ... 1 l-3. Applications ... 1 6. CALIBRATION . . . . . . . . . 21 l-4. Specifications ... 2 1-5. Accessories ... 3 6-l. General . . . . . . . . . . 21 1-6. Equipment Shipped ... ... 3 6-2. Calibration Schedule . . . 22 6-3. Kelvin-Varley Divider 2. OPERATION. ... 5 Verification . . . . . . . 22 6-4. Range Calibration , . . . . 23 2-l. Front Panel Controls 6-5. Reference Voltage Supply and Terminals . . . . . . . 5 Stability Test . . . . . . 25 2-2. Rear Controls and 6-6. Oscillator