Keithley 2302 - 488.1 Protocol

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This appendix provides information on the 488.1 protocol, which increases GPIB

operating speed, as well as special trigger commands to be used with that protocol.

G

488.1 Protocol

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176

TestEquipmentDepot.com

Table of Contents

Default Chapter3
- Limitation of Warranty3
- Safety Precautions7
- Table of Contents9
- Gpib Operation18
- Status Structure18
- List of Tables19
- Common Commands20
- Replaceable Parts21
Getting Started23
- General Information24
- Power Supply Overview26
- Remote Display Option29
- Power-Up30
- Display Modes32
- Default Settings33
  - Setups - Save, Power-On, and Recall36
- Menu36
  - Getting Around the MENU39
- SCPI Programming40
Basic Power Supply Operation41
- Test Connections42
- Outputting Voltage and Current45
- Output Bandwidth50
- Output Impedance51
  - Changing the Battery Channel's Output Impedance51
- SCPI Programming - Outputting Voltage and Current52
  - Command Notes (Outputting Voltage and Current)53
- Reading Back V and I55
- SCPI Programming - Measure V and I, and DVM Input57
  - Command Notes (Measure V and I, and DVM Input)58
- Independent Voltage Measurements (DVM)58
  - DVM Input Display Mode58
  - Measurement Configuration59
- SCPI Programming - DVM59
- Sink Operation59
2 Basic Power Supply Operation60
- Figure 2-3 Sink Operation60
- Figure 2-4 Preferred Method60
- Programming Examples61
  - Outputting and Reading Back V and I61
  - DVM Measurements62
Pulse Current Measurements Overview63
- Trigger Level65
- Trigger Level Range65
- Trigger Delay65
- Integration Times66
- Average Readings Count67
- Measurement Configuration68
- Pulse Current Measurement Procedure72
  - Determining Correct Trigger Level (Pulse Current)72
- SCPI Programming - Pulse Current Measurements75
  - Command Notes (Pulse Current Measurements)77
  - Using FAST, Search, and Detect79
- Pulse Current Digitization84
- Pulse Current Step Method85
3 Pulse Current Measurements92
- Measurement Configuration103
- Long Integration Measurement Procedure106
  - General Notes107
  - Determining Correct Trigger Level (Long Integration)107
- SCPI Programming109
4 Long Integration Measurements112
- Programming Examples115
Relay Control117
- Overview118
5 Relay Control119
- Figure 5-1 External Source Relay Control119
- Figure 5-2 Internal Source Relay Control119
- Connections120
- Controlling Relays121
  - SCPI Programming122
External Triggering (Model 2306-VS Only)123
- Overview124
  - Model 2306-VS Features124
  - Typical Trigger Sequence124
6 External Triggering (Model 2306-VS Only)125
- Trigger Connections125
- Commands127
  - Command Notes128
  - External Trigger Sequences134
- Programming Examples138
GPIB Operation143
- Introduction144
- GPIB Bus Connections144
- Primary Address146
- Setting the GPIB Timeout for Responses146
  - Long Integration Readings147
  - Pulse Current Readings147
  - MAV (Message Available Bit)147
- General Bus Commands148
- Ren (Remote Enable)148
- Ifc (Interface Clear)148
- Llo (Local Lockout)149
- Sdc (Selective Device Clear)149
- Front Panel Aspects of GPIB Operation150
- Programming Syntax151
- Command Words151
- Query Commands152
- Case Sensitivity153
- Long-Form and Short-Form Versions153
- Single Command Messages154
- Multiple Command Messages154
- Command Path Rules155
- Program Message Terminator (Pmt)155
- Sending a Response Message156
- Multiple Response Messages156
Status Structure157
- Overview158
- Status Byte and Srq158
- Clearing Registers and Queues160
- Programming and Reading Registers161
  - Programming Enable Registers161
  - Reading Registers161
- Status Byte and Service Request (SRQ)162
- Status Register Sets166
- Queues175
Common Commands179
- Overview180
  - Command Notes (IEEE-488.2 Common Commands and Queries)181
Signal Oriented Measurement Commands185
- Overview186
  - Command Notes (Signal Oriented Measurement Commands and Queries)187
Display, Format, and System191
- Display Subsystem192
  - Command Notes (SCPI Commands - Display)192
- Format Subsystem194
  - Command Notes (SCPI Commands - Data Format)195
- System Subsystem197
  - Command Notes (SCPI Commands - System)198
SCPI Tables199
- SCPI Command Subsystems Reference Tables200
Performance Verification221
- Introduction222
- Verification Test Requirements223
- Recommended Test Equipment224
  - Resistor Connections224
  - Resistor Considerations224
- Verification Limits225
  - Example Limits Calculation225
- Performing the Verification Test Procedures225
  - Test Summary225
  - Test Considerations225
- Output Voltage Accuracy226
- Voltage Readback Accuracy228
- Compliance Current Accuracy229
- Current Readback Accuracy231
- Digital Voltmeter Input Accuracy236
Calibration239
- Introduction240
- Environmental Conditions240
- Calibration Considerations241
  - Calibration Cycle241
- Recommended Calibration Equipment241
  - Resistor Connections242
  - Resistor Considerations242
- Front Panel Calibration242
- Remote Calibration249
  - Remote Calibration Display249
  - Remote Calibration Procedure250
- Changing the Calibration Code255
- Viewing Calibration Date and Count257
  - Viewing Date and Count from the Front Panel257
  - Acquiring Date and Count by Remote257
Disassembly259
- Introduction260
- Handling and Cleaning260
- Assembly Drawings261
- Disassembly Procedures262
- Instrument Reassembly264
Replaceable Parts265
- Introduction266
- Ordering Information266
- Factory Service266
- Parts Lists and Component Layouts266
  - Specifications297
A Specifications299
Error and Status Messages299
C Calibration Reference305
- Introduction306
  - Command Summary306
- Miscellaneous Commands306
- Detecting Calibration Errors310
- Detecting Calibration Step Completion312
- Calibration Program313
- Applications Guide319
  - Simulating Battery Impedance320
    - Variable Output Impedance Control on Channel #1320
F Model 2302 Specifics327
- General Information328
  - Specifications328
  - Power Supply Overview328
- Operational Differences328
488.1 Protocol331
- GPIB 488.1Protocol332
- Trigger on Talk both Channels335
  - Bus Commands335
  - Command Notes336
- Trigger Continuous Mode336
- Index339

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