Keithley 410C(Model410 252C410C) free download

File name 410C(Model410_252C410C).pdf

r \ MODEL 410 and MODEL 410C MICRO-MICROAMMETER KEITHLEY INSTRUMENTS, INC. CLEVELAND, OHIO CONTENTS SECTION ... INT'ROD'JCTION .. ... ... ... DESCRIPTION .. ... ... Currznt ranges Input Impedance Input connectors Input Switch Grid Current Zero Drift Zero Control Rocordor Output Response Speed Amplifier Noise Circuit Description Calibration OPERATION... .. ... .. ... Input Connections Input Connections Using Direct Leads Grid Current Recording Speed of Response MAINTENANCE... .. .*a..., Maintenance Adjustments Insulation Connector Caps SPECIAL INSTRUCTIONS THE MODEL FOR 41OC.. .. ,..#... KEITHI. INSTRUMENTS CZWELAN3, OHIO SECTIONI INTRODUCTION Model 410 The Keithley Model 410 Micro-microammeter is a line operated vacuum tube electrometer designed and constructed especially for measuring small currents. Full scale ranges are from 10-3 to j x 13-13 ampere, The fsaturos include full-scale voltage drop at the lnptit of less than five millivolts, zero drift of less than 2% of full scale in eight hours, good accuracy and calibration stability, and simpli- city of operation. It also has an output which will drive a O-l or 0-3 milliampere recorder as weli as the numerous potentiometer - rebalance recorders; one output terminal is at ground, making it convenient to connect cathode ray oscilloscopes or pen-driving amplifiers, similar to the Brush and Sanborn equipment. The major panel controls are the rsngo switch (amperes full- scale) and the zero. Minor controls are the Zero Check, used to short circuit the input and in setting the zero, Meter Polarity Tar providing up-scale readings for currents flowing in either di- rection, and an ON-OFFpower switch. The mater dial is illuminated, and these bulbs serve as the pilot light. Model 41OC The Keithley Model 41OC is identical to the Model 410, except that the panel meter is provided with contacts which can be set to close at any predetermined meter pointer deflection. The delicate contacts of the meter operate a relay in the 410~7, and the relay contacts (SPDL') are available for external switching functions through an AN connector on the rear of the chassis. - I-1 - KEITHI,EY