Keithley 236 Service Manual

List of
Illustrations
SECTION
1
Performance Verification
Figure 14
Setup for Equipment Characterization 1-4
Figure 1-2
Setup for Common
Mode
Verification 1-7
Figure 1-3
Setup for
Voltage
Source
Ranges
Verification 1-9
Figure 1-4
Setup for Voltage Measure Ranges Verification 1-10
Figure 1-5
Setup for Remote Sense Verification 1-12
Figure
1-6 Setup
for Low Current Measure Ranges Verification (lnA
to
lOmA)
1-13
Figure 1-7
Setup for Low Current Source Ranges Verification (lnA
to
lOmA)
1-16
Figure 1-8
Setup for
lOOmA
Measure
Range Verification
1-19
Figure
1-9
Setup
for
lOOmA Source Range Verification
1-21
SECTION 2
Calibration
Figure 2-1
Calibration Switch (Cal Lock)
2-2
Figure
2-2 Setup for Equipment Characterization 2-4
Figure
2-3 Setup
for Volts Calibration 2-7
Figure 2-4
Setup
for lOOmA Range Calibration 2-10
Figure
2-5 Current
Ranges Calibration
(lnA
to
lOmA)
2-12
Figure
2-6 Ui
Error Status Word 2-15
Figure 2-7
U7 Calibration Status Word 2-16
SECTION
3 — Maintenance
Figure
3-1 Line
Voltage
Switch and Line
Fuse 3-1
Figure
3-2 Digital Board
3-3
Figure
3-3
Resonant
Converter Board (Model
237)
3-5
Figure
3-4 Output Board
3-6
Figure
3-5 Analog Board (Shields
Removed)
3-7
Figure
3-6 Model 237 Exploded View
3-9
SECTION 4 =
Principles of Operation
Figure 4-1
Overall
Block Diagram
4-1
Figure 4-2
Simplified Schematic
of
V/I
Control and Readback
4-3
Figure
4-3 Model
236 Output
Stage (Simplified Schematic Diagram) 4-5
Figure 4-4
Model
237 Output
Stage
(Simplified Schematic Diagram)
4-5
Figure
4-5
Simplified Schematic of
V/I
Feedback
4-6
Figure 4-6
Damping Relay Contact Bounce
4-7
Figure
4-7 Simplified Schematic of Resonant
Converter
4-9

Keithley 236 Specifications

General

Voltage Source Range	±100V
Current Source Range	±100 mA
Voltage Measure Range	±100V
Current Measure Range	±100 mA
Voltage Range	±100V
Current Range	±100 mA
Type	Source Measure Unit (SMU)
Compliance Limit	Programmable
Interface	IEEE-488
Resolution	5.5 digits
Operating Modes	Voltage source, Current source, Voltage measure, Current measure