Keithley 515 Autre
Fabricant:
Modèle:
515
Date:
1967
Catégorie:
Groupe:
Description:
Megohm Bridge

Information

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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Service et Manuel de l'utilisateur
Type manuel:
Service et Manuel de l'utilisateur
Pages:
46
Taille:
2.03 Mbytes (2130136 Bytes)
Langue:
english
Révision:
Manuel-ID:
Date:
Qualité:
Document scanné, la lecture en partie mal, en partie illisible.
Date de transfert:
2013 01 13
MD5:
356195009ba7e0413669651cc6c9fbbb
Téléchargements:
867
Service et Manuel de l'utilisateur
Type manuel:
Service et Manuel de l'utilisateur
Pages:
46
Taille:
2.04 Mbytes (2141300 Bytes)
Langue:
english
Révision:
Manuel-ID:
Date:
1962 01 01
Qualité:
Document scanné, la lecture en partie mal, en partie illisible.
Date de transfert:
2018 08 23
MD5:
a8eb2a5fe2f3f6b9a7908a7608248c9c
Téléchargements:
642

Information

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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