4-l
4-2
4-3
4-4
4-5
4-6
4-7
4-8
4-9
4-10
4-11
4-12
Insulation Resistance Measurement (Ungaurded)
..........
Insulation Resistance Measurement (Guarded) ............
Insuiation Resistance Measurement Using V/I Ohms Mode.
Measuring High Impedance Gate-Source Voltage ..........
Leakage Current Measurement .........................
Diode Characterization ...............................
DiodeCurves.. .....................................
Capacitor Leakage Tests
..............................
Capacitor Measurement. ..............................
Configuration for Voltage Coefficient Studies ...........
Farady Cup Construction .............................
Using the Model 617 with an External High Voltage Source
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5-l
5-2
5-3
5-4
5-5
5-6
5-7
5-8
5-9
Test Fixture Construction
.....................................
Connections for Amps Verification (200nA-2mA Ranges) ...........
Connections for Amps Verification (2pA-20nA Ranges) ............
Connections for Coulombs Verification ..........................
Connections for Volts Verification
..............................
Connections for Ohms Verification (2kQ-20MQ Ranges) ............
Connections for Ohms Verification (200MR. 2G0 and 20Gfl Ranges).
Input Impedance Verification ..................................
Connections for Voltage Source Verification ......................
6-l
6-2
6-3
b-4
b-5
6-b
6-7
6-8
6-9
6-10
6-11
6-12
b-13
b-14
b-15
6-16
Overall Block Diagram ............................
Basic Configuration Electrometer Preamplifier
.........
Electrometer Preamplifier Configuration ..............
Simplified Schematic of Input Stage
..................
GainStage .......................................
Output Stage Configuration (Volts and Ohms) .........
Output Stage Configuration (Amps and Coulombs)
.....
Ohms Voltage Source Simplified Schematic ...........
Zero Check Configuration (Volts and Ohms) ..........
Zero Check Configuration (Amps and Coulombs) ......
Simplified Schematic of Ranging Amplifier ............
Multiplexer and Buffer
.............................
Multiplexer Phases ...............................
-2V Reference Source.
............................
A/D Converter. ..................................
Simplified Schematic of Voltage Source Output Stage ...
.., ..,
6-2
6-3
b-4
b-5
6-5
6-5
6-b
b-6
b-7
6-7
b-8
6-8
6-9
6-9
b-10
6-13
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..........
..........
...................
...................
7-l
7-2
7-3
7-4
7-5
7-6
7-7
7-8
7-9
7-10
7-11
Test Fixture Construction .......................................
Calibration Jumper Location .....................................
Input Offset Adjustment Locations.
...............................
Connections for Amps Calibration (20pA Range) ....................
Connections for Amps Calibration (20nA. 20/rA and 20mA Ranges)
Connections for Coulombs Calibration ............................
Connections for Volts Calibration ................................
Connections for Ohms Calibration (20GQ and 2OOMO Ranges) .........
Connections for Ohms Calibration (2Ok%ZOMQ)
....................
Connections for Voltage Source Calibration
.....................
Model617ExplodedView .......................................
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7-l
7-3
7-5
7-6
7-7
7-a
7-8
7-9
7-10
7-10
7-13
vii