Equipment information

Keithley 242 Power supply
Manufacturer
Keithley
Model 242
Date 1965
Category: Measurement instruments
Group Power supply
Description REGULATED HIGH VOLTAGE SUPPLY
Information
                                    The Keithley Model 242 Regulated High Voltage Supply provides accurate,
stable outputs between 300 and 3500 volts dc. Accuracy is -0.1% for all loads up to 25
milliamperes. Stability is 20.01% for six months after a 30-minute warm-up. Line regulation
is within ?O.OOS% for a 10% change in line voltage, and load regulation is within
+/- O.OOS% from zero to full load.

These manuals are available for the above equipment:

Keithley -- 242 -- Service and User Manual
File name Keithley-3532-Manual-Page-1-Picture
Manual Type Service and User Manual
Pages 28
Size 1.38 Mbytes (1447944 Bytes)
Language english
Revision
Manual-ID/Number
Date October 1965
Quality Scanned document, reading partly badly, partly not readable.
Upload date
MD5 44e49f140bc75a86188128d789d571f2
Downloads 213 since 27 May 2012
Information
GENERAL DESCRIPTION ........ 1
l-1. General ........... 1
1-2. Features .......... 1
l-3. Applications ........ 1
1-4. Specifications ....... 2
1-5. Accessories ......... 2
l-6. Equipment Received ..... 2
OPERATION. ............ 3
2-1. Front Panel Controls and
Terminals ......... 3
2-2. Operating Procedures .... 4
2-3. Overloads .......... 4
2-4. Floating Operation ..... 4
CIRCUIT DESCRIPTION ........ 5
3-l. General ........... 5
3-2. AC Control Circuits ..... 5
3-3; Low and High Voltage Supplies 5
3-4. Regulator Circuit ...... 6
SERVICING. ............ 7
4-1. General ........... 7
4-2. Servicing Schedule ..... 7
Section Page
5.
6.
4-3. Parts Replacement . . . . . . 7
4-4. Troubleshooting . . . . . . . 7
4-5. Procedures to Guide
Troubleshooting , . . . , , 8
4-6. Correcting for No Output , . 9
4-7. Correcting for Inaccurate
Voltage Output . . . . . . . 9
4-a. Bias Adjustment , . . . . . .lO
4-9. Improperly Working Overload .lO
CALIBRATION . . . . . . . . . . . .ll
5-1. General . . . . . . . . . . .ll
5-2. Calibration Schedule . . . .ll
5-3. Output Calibration . . . . .ll
REPLACEABLE PARTS . . . . . . . . .17
6-l. Replaceable Parts List . . .17
6-2. How to Order Parts . . . . .17
Model 242 Replaceable Parts
List . . . . . . . . . . .~ .18
Model 242 Schematic Diagram
14661D . . . . , . , . . . .25
'*Change Notice
QkYellow Change Notice sheet is included only
for instrument modifications affecting the
Instruction Manual.
Keithley-3532-Manual-Page-1-Picture
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