Name: Keithley 6487
Brand: Keithley
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IEEE-488 and SCPI

Conformance Information

• GPIB 488.1 Protocol – This section introduces the GPIB 488.1 protocol.

• Selecting the 488.1 protocol – This section describes how to select the 488.1

protocol.

• Protocol differences – This section covers the differences between the 488.1 proto-

col and the SCPI protocol.

Default Chapter3
- Safety Precautions3
- Table of Contents5
1 Getting Started13
- Introduction14
- Overview of this Manual14
- General Information15
- Power-Up17
- Front Panel Operation20
- Status and Error Messages20
- Default Settings20
  - Front Panel Setup Operation21
  - Remote Setup Operation21
- Menus24
  - Main Menus24
  - Configuration Menus25
- SCPI Programming26
  - Optional Command Words26
  - Query Commands26
2 Measurement Concepts and Connections27
- Connection Fundamentals28
- Basic Connections to DUT30
- Using a Test Fixture34
- Interlock39
- Analog Output40
- Measurement Considerations42
3 Measurements and Sourcing Voltage43
- Measurement Overview44
  - Current Measurements44
  - Voltage Source44
- Performance Considerations45
- Current Measurements49
  - Procedure49
  - Programming Example53
- Ohms Measurements53
- Voltage Source Operation57
- Alternating Voltage Ohms Mode63
4 Range, Units, Digits, Rate, and Filters74
- Range, Units, and Digits75
- Rate79
  - SCPI Programming - Rate80
- Damping81
- Filters81
5 Relative, MX+B, M/X+B, and Log86
- Relative87
  - Setting and Controlling Relative87
  - SCPI Programming - Relative89
- MX+B, M/X+B (Reciprocal), and Logarithmic90
6 Buffer and Sweeps94
- Buffer Operations95
- Voltage Sweeps101
7 Triggering109
- Trigger Models110
- SCPI Programming118
  - Programming Example119
- External Triggering120
8 Limit Tests and Digital I/O125
- Limit Testing126
- Binning129
- Digital I/O Port135
- Front Panel Operation - Limit Tests140
  - Limit Test Configuration140
  - Performing Limit Tests141
- SCPI Programming - Limit Tests142
  - Programming Example145
9 Remote Operation146
- Selecting and Configuring an Interface147
- GPIB Operation and Reference149
- RS-232 Interface Reference161
10 Status Structure165
- Overview166
- Clearing Registers and Queues168
- Programming and Reading Registers169
  - Programming Enable Registers169
  - Reading Registers170
- Status Byte and Service Request (SRQ)171
- Status Register Sets174
  - Register Bit Descriptions174
    - Operation Event Status176
    - Measurement Event Status177
- Queues181
  - Output Queue182
  - Error Queue183
11 Common Commands185
12 SCPI Signal Oriented Measurement Commands190
13 Display, Format, and System194
- Display Subsystem195
- Format Subsystem197
- System Subsystem202
14 SCPI Reference Tables205
- General Notes206
15 Performance Verification224
- Introduction225
- Verification Test Requirements225
- Recommended Test Equipment226
- Verification Limits228
  - Example Reading Limits Calculation228
- Calibrator Voltage Calculations228
- Performing the Verification Test Procedures229
  - Test Considerations229
  - Restoring Factory Defaults229
- Offset Voltage Calibration230
- Current Measurement Accuracy230
  - 20Μa-20Ma Range Accuracy230
  - 2Na-2Μa Range Accuracy231
- Voltage Source Output Accuracy233
16 Calibration235
- Introduction236
- Environmental Conditions236
- Calibration Considerations237
- Calibration Cycle237
- Recommended Calibration Equipment237
- Calibration Errors238
- Calibration Menu239
- Aborting Calibration240
- Current Calculations240
- Calibration Procedure241
- Calibration Support248
17 Routine Maintenance250
- Introduction251
- Setting Line Voltage and Replacing Line Fuse251
- Front Panel Tests252
  - DISP Test253
  - KEY Test253
- Specifications254
- Status and Error Messages256
  - Eliminating Common SCPI Errors262
- DDC Emulation Commands264
  - DDC Language265
- IEEE-488 Bus Overview279
- IEEE-488 and SCPI294
Conformance Information294
- Introduction295
- GPIB 488.1 Protocol296
- Selecting the 488.1 Protocol297
- Protocol Differences298
- NDAC Hold-Off299
- Trigger-On-Talk300
- Message Available300
- General Operation Notes300
- SRQ When Buffer Fills with 200 Readings301
Remote Calibration302
- Introduction303
- Calibration Commands303
- Remote Calibration Overview304
Applications Guide307
- Measurement Considerations308
- Applications324

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Keithley 6487 Specifications

General

Type	Picoammeter/Voltage Source
Current Measurement Range	20 fA to 20 mA
Interfaces	GPIB, RS-232
Voltage Burden	< 200 µV
Input Impedance	>10^14 Ω
Power	100 V / 120 V / 220 V / 240 V
Basic Current Measurement Accuracy	0.4%

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