Equipment information

Keithley 427 Amplifier
Manufacturer
Keithley
Model 427
Date 1975
Category Measurement instruments
Group Amplifier
Description Current Amplifier
Information
                                    
GENERAL

The model 427 Current Amplifier is a high-speed,
feedback-type Amplifier with particular features useful for
automated semiconductor testing, mass spectrometry, and gas
chromatography applications.

FEATURES.

a.	Wide Dynamic Range. Selectable rise times permit
low-noise operation important when resolving small current
levels.

b.	High Speed. Typical resolution is 20 picoamperes out of a
10⁻⁸ ampere signal with a 100 microsecond rise time.

c.	Built-in Current Suppression. Small changes in the signal
level can be measured since large ambient current levels can
be easily suppressed.

d.	Overload Indication. Accurate measurements are assured
since overloads are automatically indicated.

e.	Variable Gain. The GAIN Switch is designated in eight
gain positions from 10⁴ to 10¹¹ volts per ampere - therefore
gain adjustment is straight forward.

f.	Variable Rise Time. Optimum response can be selected for
each gain setting since a separate RISE TIME switch is
provided on the front panel.

These manuals are available for the above equipment:

Manual Type Service and User Manual Keithley-3542-Manual-Page-1-Picture
Pages 47
Size 3.27 Mbytes (3428964 Bytes)
Language english
Revision
Manual-ID/Number 29103
Date 1975
Quality Scanned document, reading partly badly, partly not readable.
Upload date
MD5 f4f7bd42be0c2c47be6b1f63f0a76a17
Downloads 337 since 31 May 2012
Information
Keithley-3542-Manual-Page-1-Picture


Manual Type Service Manual Keithley-11274-Manual-Page-1-Picture
Pages 47
Size 2.00 Mbytes (2095471 Bytes)
Language english
Revision
Manual-ID/Number 29103
Date 01 January 1975
Quality Scanned document, all readable.
Upload date
MD5 088fbadd6dbec7b7fbbb5f66d479b13e
Downloads 37 since 23 August 2018
Information
SPECIFICATIONS
— ... iv

1.	GENERAL DESCRIPTION------------------------------------— — 1

2.	OPERATION ...  4

3.	APPLICATIONS ... ------------------------------ 9

4.
ACCESSORIES------------------------------------------------ 10

5.	CIRCUIT
DESCRIPTION ...  12

6.	REPLACEABLE
PARTS- ... ------------------------------------ 17

7	•
CALIBRATION------------------------------------------------26

SCHEMATICS----------------------------------------------------33
Keithley-11274-Manual-Page-1-Picture


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