Equipment information

Keithley 427 Amplifier
Manufacturer:
Model:
427
Date:
1975
Category:
Group:
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.

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Service Manual
Manual Type:
Service Manual
Pages:
47
Size:
2.00 Mbytes (2095471 Bytes)
Language:
english
Revision:
Manual-ID:
29103
Date:
1975 01 01
Quality:
Scanned document, all readable.
Upload date:
2018 08 23
MD5:
088fbadd6dbec7b7fbbb5f66d479b13e
Downloads:
446

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

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Service and User Manual
Manual Type:
Service and User Manual
Pages:
47
Size:
3.27 Mbytes (3428964 Bytes)
Language:
english
Revision:
Manual-ID:
29103
Date:
Quality:
Scanned document, reading partly badly, partly not readable.
Upload date:
2012 05 31
MD5:
f4f7bd42be0c2c47be6b1f63f0a76a17
Downloads:
785