Keithley 662 Wzmacniacz
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Model:
662
Date:
1965
Category:
Group:
Description:
Information
The Keithley model 662 Guarded dc Differential Voltmeter is an extremely precise self-contained, guarded potentiometer. It measures from 100 millivolts to 500 volts with 0,01% limit of error, and below 100 millivolts within 10 microvolts. Since the limit of error includes all stability considerations, the unit need not be periodically calibrated or manually restandardized for a full year. The 500-volt reference supply permits infinite impedance at null for measurements from 0 to 500 volts. Six dials assure that every voltage setting has at least 5-dial resolution.
b. Features for convenient use include: six in-line readout dials with automatically lighted decimal points; 10 to 25-millivolt recorder output; input polarity switch; floating operation up to 500 volts off chassis ground; line frequency rejection greater than 45 db. Also, full guarding minimizes leakage problems.
OPERATING MODES. The model 662 can be used as a potentiometer or as a conventional vacuum tube voltmeter. As a potentiometer, it measures from 100 millivolts full scale to 500 volts with +/-0.01% limit of error and from 100 microvolts full scale to 100 millivolts within 10 microvolts. As a VTVM, the model 662 measures from 1 millivolt full scale to 500 volts with an accuracy of +/- 3% of full scale. It can also measure resistances from 1 megohm to 100,000 megohms within +/- 5%.
Manual type:
Serwis i User Manual
Pages:
49
Size:
3.51 Mbytes (3677370 Bytes)
Language:
english
Revision:
Manual-ID:
Date:
1965 01 01
Quality:
Skanowany dokument, czytając częściowo źle, nie częściowo czytelny.
Upload date:
2020 07 24
MD5:
5cba3597bd6589e1978a4cded0b354a2
Downloads:
283
Information
1. GENERAL DESCRIPTION ...
1-1. Description ... . 1
1-2. . 1
1-3. Applications ... . 1
1-4. Specifications ... . 2
1-5. Accessories ... . 3
1-6. Equipment Shipped ...
2. OPERATION . • ... . 5
2-1. Front Panel Controls
. 5
2-2. Rear Controls and
Terminals ... . 5
2-3. Preliminary Procedures. . . . 6
2-4. Operating Procedures. . . . . 6
2-5. Recorder Output ... . 8
2-6. Effects Due to Kelvin-
Varley Divider Out-
put Resistance ... . 9
2-7. Effective Input Resis-
tcinc^ « ••••»■«** . 9
2-8. Thermal EMF Precau-
. 10
2-9. AC Effects on Measurement . . 10
3. APPLICATIONS ... . 11
3-1. Procedures for Measuring
Resistances ... . 11
3-2. Theory of Measuring Resis-
. U
4. CIRCUIT DESCRIPTION ... 13
4-1. . 13
4-2. Reference Voltage Supply. . . 13
4-3. Kelvin-Varley Divider . . . . 14
4-4. Null Detector ... . 14
4-5. . 15
5. SERVICING ... 17
5-1. . 17
5-2. Servicing Schedule ... . 17
5-3. . 17
5~4. Troubleshooting ... . 17
5-5. Adjusting Hum Bal Control . . 19
5-6. Zener Diode Replacement , . . 19
5-7. Meter Adjustment ... . 19
6. CALIBRATION ... . 21
6-1. General ... . 21
6-2. Calibration Schedule. . . . . 22
6-3. Kelvin-Varley Divider . . .
Verification ... . , . 23'
6-5. Reference Voltage Supply
Stability Test ... . 25
6-6. Oscillator Adjustment . . . . 27
7. ACCESSORIES ... . 35
7-1. Model 6601A High Voltage
Divider ... . 35
7-2. Rack Mounting ...
7-3. Placing in Rack ... . 36
8. REPLACEABLE PARTS ... . 37
8-1. Replaceable Parts List. . . . 37
8-2. How to Order Parts ... . 37
model 662 Replaceable
Parts List ... . 38
Model 6601A Replaceable
Farts List ...
model 662 Schematic Diagram
1855 IE ... . 47
Model 6601A Schematic Diagram
16321B ... , 49
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