Keithley - 242 - Power Supply
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Equipment:
242
Date:
1965
Category:
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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.
1 Manual
Service and user manual
Manual type:
Service and user manual
Pages:
28
Size:
1.4 MB
Language:
english
Revision:
Manual-ID:
Date:
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
May 27, 2012
MD5:
44e49f14-0bc7-5a86-1881-28d789d571f2
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.
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