Equipment information

Keithley 240A Power supply
Model: 240A
Date: 1978
Category: Measurement instruments
Group: Power supply
Description: High Voltage Supply

GENERAL The Keithley Model 240A is a compact high voltage supply which provides accurate, stable outputs from 0 to 1200 volts dc. Accuracy is +1% of the dial setting for all outputs. Stability is +0.02% +2 millivolts the first hour or in subsequent 8-hour periods, after a 30-minute warm-up. Line regulation is +0.005% +2 millivolts for a 10% change in line voltage, and load regulation is +0-0057o +2 millivolts from no load to full load. FEATURES. a. Three Digit Resolution. Three in-line calibrated dials set the output voltage in 1-volt steps. A TRIM Control permits interpolation between steps with better than 5-millivolt resolution. Output can be selected positive or negative with respect to ground. b. Overload Protection. Repeated overloading or operation in an overloaded condition for long periods will not damage the Model 240A. Overload protection limits the output current to less than 13 milliamperes and, when the overload is removed, automatically returns the Supply to its set value. c. Solid-State Design. The circuit for the Model 240A takes advantage of the reliability and stability of a solid-state comparator amplifier, and the high voltage capability of a series regulator tube to provide a high performance circuit.

These manuals are available for the above equipment:

Manual Type: Service and User Manual Keithley-11247-Manual-Page-1-Picture
Pages: 27
Size: 1.87 Mbytes (1961726 Bytes)
Language: english
Date: 01 May 1978
Quality: Scanned document, reading partly badly, partly not readable.
Upload date:
MD5: 0167cf382edd6092ef6267d8df66c210
Downloads: 165 since 22 August 2018

1 Front Panel. --------------------------------------------ii 2 Front Panel Controls. --------------------------1 3 Rear Panel Terminals. --------------------------2 4 Output Impedance VS Frequency. --------4 5 Overall Block Diagram. ------------------------6 6 Voltage Control Comparator. --------------7 7 Test Points, Current Limit Circuit. 10 8 Test Box for Noise Check.------------------11 9 Chassis, Top View. --------------------------------12 10 Component Layout, PC-116. ------------------13 11 Component Layout, PC-117 (Part 1). 14 12 Component Layout, PC-117 (Part 2). 15


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