Keithley 246 Netzteil
Hersteller:
Modell:
246
Datum:
1967
Kategorie:
Gruppe:
Beschreibung:
High Voltage Supply

Information

GENERAL The Keithley model 246 is a high voltage supply which provides accurate, stable outputs from 0 to 3100 volts dc. Accuracy is ±1% of the dial setting for all outputs. Stability is ±0.01% ±2 millivolts the first hour or in subsequent 8-hour periods, after a 1-hour warm-up. Line regulation is 0.001% plus 2 millivolts for a 10% change in line voltage, and load regulation is 0.002% plus 2 millivolts from no load to full load. FEATURES. a. Three in-line calibrated dials set the output voltage in 10-volt steps. The fourth dial is a potentiometer that permits interpolation between steps with 50-millivolt resolution. Output can be selected positive or negative with respect to ground. b. Repeated overloading or operation in an overload condition for long periods will not damage the model 246. 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. The circuit for the model 246 takes advantage of the reliability and stability of a solid-state comparator amplifier, and the high voltage capability of two stacked series regulator tubes to provide a high performance circuit. Metal-film range resistors and a selected zener diode contribute to its overall accuracy and stability. 1-3. APPLICATIONS. a. The model 246 is an ideal high voltage biasing supply for photomultiplier tubes, ion chambers, photocells and other current detectors. It is also suited for use in applications such as voltage gradient studies, surface and volume resistivity measurements and capacitor leakage measurements. b. The output of the Voltage Supply may be remotely controlled or programmed by adding connectors to the rear panel. Mounting holes are provided to easily modify the model 246.

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Service- und Bedienungsanleitung
Dokumenttyp:
Service- und Bedienungsanleitung
Seiten:
50
Größe:
4.30 Mbytes (4508326 Bytes)
Sprache:
english
Revision:
Dokument-ID:
Datum:
1967 01 01
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Gescanntes Dokument, teilweise schwer oder teilweise nicht zu lesen.
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2018 08 23
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model 246 SPECIFICATIONS. . . . 1, , GENERAL DESCRIPTION ... 1-1. General ... 1-2. 1-3. Applications ... 2, . OPERATION ... 2-1. Connections ... 2-2. Preliminary Procedures. 2-3. Operating Checks. . . . 2-4. Setting Output Voltage. 2-5. Overload Operation. . . 2-6. Capacitive Loads. . . . 2-7. Output Noise ... 2-8. Short-Term Stability, . 2-9. Temperature Coefficient 2-10. Remote Programing . . . 2-11. model 246 Modifications for Resistance Programing ... 2-12. Circuit for Resistance Programing ... 2-13. Operation for Resistance j Programing ... 2-14. model 246 Modifications for Voltage Programing. 2-15. Circuit for Voltage Programing ... 2-16. Operation for Voltage Programing ... . 11 3. , CIRCUIT DESCRIPTION. . . . . 13 3-1. General ... . 13 3-2. High and Low Voltage Supplies ... . 13 3-3. Voltage Control. . . . . 13 3-4. Output Voltage ... . 14 3-5. Current Control. . , . . 14 4. . SERVICING ... . 15 4-1. General. ... . 15 4-2. Servicing Schedule . . . 15 4-3. Parts Replacement. . . . 15 4-4. Troubleshooting. . . . . 17 4-5. Procedures to Guide Troubleshooting. . . . . 17 4-6. Transformer Check.. , . . 18 4-7. Troubleshooting the Volt- age Control Amplifier. . 18 4-8. Troubleshooting the Current Limit Circuits . 18 4-9. Troubleshooting the Overload Lamp Circuit. . 19 4-10. Output Noise ... . 20 5. CALIBRATION ... 5-1. General ... . 21 5-2. Calibration Schedule. . . 21 5-3. Zero Balance Adjustment . 21 5-4. Voltage Calibration . . . 21 5-5. Current Limit Circuit 6. Accessories ... 6-1. Rack Mounting ... . 29 6-2. Model 3008 Bench Mounting Kit ... 6-3. MHV Mating Connector Cable Assemblage. . . . . 30 7. REPLACEABLE PARTS ... 7-1. Replaceable Parts List. . 33 7-2. How to Order Parts. . . . 33 model 246 Replaceable . 34 model 246 Schematic Diagram 21176E ... . 41 Green Calibration and ^Change Notice Last page * Yellow change notice sheet is in- eluded only for instrument modifi-

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