Keithley 440(Model 440 Picoammeter) free download

File name 440(Model 440 Picoammeter).pdf

INSTRUCTION MANUAL MODEL 440 DIGITAL PICOAMMETER INSTRUCTION MANUAL MODEL 440 DIGITAL PICOAMMETER 0 COPYRIGHT 1974 :. ,. - .I : CONTENTS Section Psq:e SpEClFIC*TIfJNS -___--__-___-____-__---------------------------- i" 1. GENEp&, DESCRIPTION--_-____------_------------------------- 1 2. OPWTlON --------------------__________I_________--------------- 3 3. Cl&-"lT DESCRIPTpJX--------------------______I_____________--- 10 `. *C(-ESSORlES -__------------------_----------I-------------------------- 25 5, CUp,UTION __-____----____----____________________I__------------ 27 lj. F\EP,dCEBLE pa?s ---------------------------------------------------- 32 SCHyJJICS -__--___-_---_-----_----------------------------- 53 i. MODEL 440 ILLUSTRATIONS Fip. NO. Title Page 1 Franc Panel. 1 2 Franc Panel Controls. 2 3 Rear Panel CmlfTOlS and Terminals. 2 4 Prinrer/Canerol Connector. 8 5 Timing Diagram. 9 6 Simplified Diagram of Feedback Ammeter. 10 7 Gain Calibration of Amplifier. 10 8 Damping for Anmeter. 11 9 Zero Check Operarion. 11 10 Block Diagram of AID Converter. 12 11 Delay Hold Circuit. 13 12 Incegratar Circuit. 13 13 Zero Crossing Decxtar. 13 14 "ode1 4401 Buffer Stage. 15 15 Chassis Top View, Showing Cal. Adjustments. 17 lb Location of Printed Circuit Boards. 18 17 Component Layout, K-207. 19 18 componenr layout, PC-208. 19 19 component Layour, PC-210.