Keithley 6514 User Manual

3Volts and Ohms Measurements
Measurement overview ............................................................... 3-2
Guarding ..................................................................................... 3-2
Test circuit leakage .............................................................. 3-2
Input cable leakage and capacitance ................................... 3-3
Volts and ohms measurement procedure .................................... 3-4
V-Drop and I-Source for ohms ............................................ 3-6
SCPI programming ..................................................................... 3-7
Programming example ........................................................ 3-8
Volts and ohms measurement considerations ............................. 3-9
Loading effects .................................................................... 3-9
Cable leakage resistance ...................................................... 3-9
Input capacitance (settling time) ....................................... 3-10
Guarding input cable ......................................................... 3-12
Application ............................................................................... 3-14
Capacitor dielectric absorption .......................................... 3-14
4 Amps Measurements
Measurement overview ............................................................... 4-2
Amps measurement procedure ................................................... 4-2
Damping .............................................................................. 4-4
High impedance measurement techniques ................................. 4-5
SCPI programming ..................................................................... 4-8
Programming example ........................................................ 4-9
Amps measurement considerations ............................................ 4-9
Input bias current ................................................................. 4-9
Voltage burden ..................................................................... 4-9
Noise .................................................................................. 4-10
Applications .............................................................................. 4-13
Diode leakage current ........................................................ 4-13
Capacitor leakage current .................................................. 4-14
Cable insulation resistance ................................................ 4-14
Surface insulation resistance (SIR) ................................... 4-15
5 Coulombs Measurements
Measurement overview ............................................................... 5-2
Auto discharge ............................................................................ 5-2
Coulombs measurement procedure ............................................ 5-3
SCPI programming ..................................................................... 5-5
Programming example ........................................................ 5-6
Coulombs measurement considerations ..................................... 5-6
Input bias current ................................................................. 5-6
External voltage source ....................................................... 5-6
Zero check hop and auto discharge hop .............................. 5-7
Application ................................................................................. 5-7
Capacitance measurements ................................................. 5-7

Keithley 6514 Specifications

General

Brand	Keithley
Model	6514
Category	Measuring Instruments
Language	English