Keithley 28970B(Model178) free download

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SERVICE MANUAL Digital Multimeter Model 178 @ COPYRIGHT 1978, KElTHLEY INSTRUMENTS, INC. FIRST PRINTING, FEBRUARY 1978, CLEVELAND, OHIO, U. S. A. SECOND PRINTING, FEBRUARY 1979, CLEVELAND, OHIO, U. S. A. DOCUMENTSNO. i8970 \ INSTRUCTION MANUAL olgltal Multimeter Model 178 CONTENTS Section Page CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ii ILLUSTRATIONS i ii SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v I. GENERAL INFORMATION 1-l l-l. INTRODUCTION . . . , . . . . . . , . . . . . . . . . . . . . . , . . . . i-i l-2. WARRANTY INFORMATION l-l l-3. CHANGE NOTICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-I 2. OPERATION 2-l 2-l. GENERAL . . . . . . . . . . . . . . . . . , . . , . . . . . . . . . . . 2-1 2-2. INSPECTION 2-I 2-3. PREPARATION FOR USE . . . . , . . . . . . . . . . . . . . . . . . . . . 2-l 2-4. OPERATION ON LINE POWER 2-l 2-5. OPERATION ON BATTERY PACK POWER . . . , , , . . . , . . . . . . . . , . 2-2 2-6. BATTERY CHARGING 2-2 2-7. OPERATING INSTRUCTIONS . . , . . . . , . . . . . , . . . . . . . . . . . 2-3 2-8. DC VOLTAGE MEASUREMENT 2-4 2-9. AC VOLTAGE MEASUREMENT , , . . , . . , . . . . . . . , . . . . , . . . . 2-5 2-10. RESISTANCE (n) MEASUREMENT