Informações do equipamento

Keithley 515 Outro
Fabricante:
Keithley
Modelo: 515
Data: 1967
Categoria: Instrumentos de medição
Grupo: Outro
Descrição: Megohm Bridge
Informações:
                                    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.

Estes manuais estão disponíveis para os equipamentos acima:

Tipo manual: Serviço e Manual do Usuário Keithley-3956-Manual-Page-1-Picture
Páginas: 46
Tamanho: 2.03 Mbytes (2130136 Bytes)
Língua: Inglês
Revisão:
Manual-ID/número:
Data: 1967
Qualidade: Documento Scaned, a leitura parcialmente mal, não parcialmente legível.
Upload de data:
MD5: 356195009ba7e0413669651cc6c9fbbb
Downloads: 199 desde 13 Janeiro 2013
Informações:
Keithley-3956-Manual-Page-1-Picture


Tipo manual: Serviço e Manual do Usuário Keithley-11280-Manual-Page-1-Picture
Páginas: 46
Tamanho: 2.04 Mbytes (2141300 Bytes)
Língua: Inglês
Revisão:
Manual-ID/número:
Data: 01 Janeiro 1962
Qualidade: Documento Scaned, a leitura parcialmente mal, não parcialmente legível.
Upload de data:
MD5: a8eb2a5fe2f3f6b9a7908a7608248c9c
Downloads: 7 desde 23 Agosto 2018
Informações:
I.	INTRODUCTION....................1-1

II.	SPECIFICATIONS.........II-1

III.	OPERATION............III-l

A.	Outline of Procedure ....	III-l

B.	Description of Controls

and Terminals .......	III-2

C.	Operation Steps.......III-3

D.	Standardization.......III-4

E.	Connecting the Unknown

Resistor..........III-4

F.	External Bridge Voltage

Supply...........III-8
G.	Voltage Across Unknown and

Standard Resistors. .... III-8

H.	Accuracy Considerations. . . 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
Keithley-11280-Manual-Page-1-Picture


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