Keithley 515 Ander
Fabrikant:
Model:
515
Datum:
1967
Categorie:
Groep:
Omschrijving:
Megohm Bridge

Informatie

The model 515 Megohm Bridge is a Wheatstone Bridge for measuring resistors from 10⁵ ohms to 10⁻¹⁵ ohms with accuracies from 0.05% to 1.0%. It is complete, with an electrometer null detector, shielded enclosure for the unknown, and a bridge voltage supply. A unique system of switches is provided to allow corrections to be made for the slow changes in resistance of the standard high megohm resistors. This enables all values of resistance to be read with rated accuracy, directly from the bridge dials. Bridge voltages in one volt steps up to 10 volts are available from the internal supply. With external supplies, voltages as high as 1,000 volts can be used. A connector is provided so that unknown resistors can be measured outside the instrument as well as in the built-in shielded enclosure.

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english
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Service-en gebruikershandleiding
Handleidingen type:
Service-en gebruikershandleiding
Pagina’s:
46
Grootte:
2.04 Mbytes (2141300 Bytes)
Taal:
english
Herziening:
Handleidingen-ID:
Datum:
1962 01 01
Kwaliteit:
Gescande document, lezen deels slecht, deels niet leesbaar.
Upload datum:
2018 08 23
MD5:
a8eb2a5fe2f3f6b9a7908a7608248c9c
Downloads:
635

Informatie

III-9 1. Null Detector Sensitivity ... III-9 2. Null Detector Zero Drift ... 111-10 3. Resolution of the Readout ... 111-10 4. Accuracy of the Read- out and Standard Resistors ... . 111-10 5. Temperature and Voltage Coefficients in the Bridge Resistors ... III-I2 6. Leakage Resistance Across the Unknown, . . 111-12 7. Errors Caused by Guard to Ground Resistance, . Ill-12 Section Page 8. Time Constants - Slow Response ... 111-13 9. Transients Caused by Push-to-Read Switch. , 111-14 10. Verification of the Accuracy ... 111-14 IV. CIRCUIT DESCRIPTION ... IV-1 A. Power Supply ... IV-1 B. Null Detector ... IV-1 C. Bridge Circuitry ... IV-3 D. Overvoltage Protection. . . IV-4 V. MAINTENANCE ... V-l 6. REPLACEABLE PARTS ... 6-1 6-1. Replaceable Parts List. . 6-1 6-2. How to Order Parts, . . . 6-1 model 515 Replaceable Parts List ... 6-2 model 515 Schematic Diagram 14522D ... 6-10

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