Keithley DMM7510 User manual

Reference Manual
DMM7510-901-01 Rev. B / May 2015
*PDMM751090101B*
DMM7510-901-01B
www.keithley.com
Model DMM7510
7½ Digit Graphical Sampling Multimeter
A Greater Measure of Confidence

7½ Digit Graphical Sampling Multimeter
Reference Manual
© 2015, Keithley Instruments
Cleveland, Ohio, U.S.A.
All rights reserved.
Any unauthorized reproduction, photocopy, or use of the information herein, in whole or in part,
without the prior written approval of Keithley Instruments is strictly prohibited.
TSP®, TSP-Link®, and TSP-Net®are trademarks of Keithley Instruments. All Keithley Instruments
product names are trademarks or registered trademarks of Keithley Instruments. Other brand
names are trademarks or registered trademarks of their respective holders.
The Lua 5.0 software and associated documentation files are copyright © 1994 - 2013, Tecgraf,
PUC-Rio. Terms of license for the Lua software and associated documentation can be accessed at
the Lua licensing site (http://www.lua.org/license.html).
Document number: DMM7510-901-01 Rev. B / May 2015
Model DMM7510

Safety precautions
The following safety precautions should be observed before using this product and any associated instrumentation. Although
some instruments and accessories would normally be used with nonhazardous voltages, there are situations where hazardous
conditions may be present.
This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions
required to avoid possible injury. Read and follow all installation, operation, and maintenance information carefully before using
the product. Refer to the user documentation for complete product specifications.
If the product is used in a manner not specified, the protection provided by the product warranty may be impaired.
The types of product users are:
Responsible body is the individual or group responsible for the use and maintenance of equipment, for ensuring that the
equipment is operated within its specifications and operating limits, and for ensuring that operators are adequately trained.
Operators use the product for its intended function. They must be trained in electrical safety procedures and proper use of the
instrument. They must be protected from electric shock and contact with hazardous live circuits.
Maintenance personnel perform routine procedures on the product to keep it operating properly, for example, setting the line
voltage or replacing consumable materials. Maintenance procedures are described in the user documentation. The procedures
explicitly state if the operator may perform them. Otherwise, they should be performed only by service personnel.
Service personnel are trained to work on live circuits, perform safe installations, and repair products. Only properly trained
service personnel may perform installation and service procedures.
Keithley Instruments products are designed for use with electrical signals that are measurement, control, and data I/O
connections, with low transient overvoltages, and must not be directly connected to mains voltage or to voltage sources with high
transient overvoltages. Measurement Category II (as referenced in IEC 60664) connections require protection for high transient
overvoltages often associated with local AC mains connections. Certain Keithley measuring instruments may be connected to
mains. These instruments will be marked as category II or higher.
Unless explicitly allowed in the specifications, operating manual, and instrument labels, do not connect any instrument to mains.
Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable connector jacks or test
fixtures. The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than
30 V RMS, 42.4 V peak, or 60 VDC are present. A good safety practice is to expect that hazardous voltage is present in any
unknown circuit before measuring.
Operators of this product must be protected from electric shock at all times. The responsible body must ensure that operators
are prevented access and/or insulated from every connection point. In some cases, connections must be exposed to potential
human contact. Product operators in these circumstances must be trained to protect themselves from the risk of electric shock. If
the circuit is capable of operating at or above 1000 V, no conductive part of the circuit may be exposed.
Do not connect switching cards directly to unlimited power circuits. They are intended to be used with impedance-limited
sources. NEVER connect switching cards directly to AC mains. When connecting sources to switching cards, install protective
devices to limit fault current and voltage to the card.
Before operating an instrument, ensure that the line cord is connected to a properly-grounded power receptacle. Inspect the
connecting cables, test leads, and jumpers for possible wear, cracks, or breaks before each use.
When installing equipment where access to the main power cord is restricted, such as rack mounting, a separate main input
power disconnect device must be provided in close proximity to the equipment and within easy reach of the operator.
For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under
test. ALWAYS remove power from the entire test system and discharge any capacitors before: connecting or disconnecting
cables or jumpers, installing or removing switching cards, or making internal changes, such as installing or removing jumpers.
Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth)
ground. Always make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the
voltage being measured.

For safety, instruments and accessories must be used in accordance with the operating instructions. If the instruments or
accessories are used in a manner not specified in the operating instructions, the protection provided by the equipment may be
impaired.
Do not exceed the maximum signal levels of the instruments and accessories, as defined in the specifications and operating
information, and as shown on the instrument or test fixture panels, or switching card.
When fuses are used in a product, replace with the same type and rating for continued protection against fire hazard.
Chassis connections must only be used as shield connections for measuring circuits, NOT as protective earth (safety ground)
connections.
If you are using a test fixture, keep the lid closed while power is applied to the device under test. Safe operation requires the use
of a lid interlock.
If a screw is present, connect it to protective earth (safety ground) using the wire recommended in the user documentation.
The symbol on an instrument means caution, risk of danger. The user must refer to the operating instructions located in the
user documentation in all cases where the symbol is marked on the instrument.
The symbol on an instrument means caution, risk of electric shock. Use standard safety precautions to avoid personal
contact with these voltages.
The symbol on an instrument shows that the surface may be hot. Avoid personal contact to prevent burns.
The symbol indicates a connection terminal to the equipment frame.
If this symbol is on a product, it indicates that mercury is present in the display lamp. Please note that the lamp must be
properly disposed of according to federal, state, and local laws.
The WARNING heading in the user documentation explains dangers that might result in personal injury or death. Always read
the associated information very carefully before performing the indicated procedure.
The CAUTIONheading in the user documentation explains hazards that could damage the instrument. Such damage may
invalidate the warranty.
Instrumentation and accessories shall not be connected to humans.
Before performing any maintenance, disconnect the line cord and all test cables.
To maintain protection from electric shock and fire, replacement components in mains circuits — including the power
transformer, test leads, and input jacks — must be purchased from Keithley Instruments. Standard fuses with applicable national
safety approvals may be used if the rating and type are the same. Other components that are not safety-related may be
purchased from other suppliers as long as they are equivalent to the original component (note that selected parts should be
purchased only through Keithley Instruments to maintain accuracy and functionality of the product). If you are unsure about the
applicability of a replacement component, call a Keithley Instruments office for information.
To clean an instrument, use a damp cloth or mild, water-based cleaner. Clean the exterior of the instrument only. Do not apply
cleaner directly to the instrument or allow liquids to enter or spill on the instrument. Products that consist of a circuit board with
no case or chassis (e.g., a data acquisition board for installation into a computer) should never require cleaning if handled
according to instructions. If the board becomes contaminated and operation is affected, the board should be returned to the
factory for proper cleaning/servicing.
Safety precaution revision as of January 2013.

Introduction...............................................................................................................1-1
Welcome .............................................................................................................................. 1-1
Extended warranty............................................................................................................... 1-1
Contact information.............................................................................................................. 1-1
CD-ROM contents................................................................................................................ 1-2
Organization of manual sections.......................................................................................... 1-2
Capabilities and features...................................................................................................... 1-3
General ratings..................................................................................................................... 1-3
General operation.....................................................................................................2-1
Instrument power ................................................................................................................. 2-1
Connect the power cord............................................................................................................2-2
Turn the Model DMM7510 on or off ..........................................................................................2-2
Front-panel overview............................................................................................................ 2-3
Rear panel overview ............................................................................................................ 2-6
Touchscreen display............................................................................................................ 2-8
Select items on the touchscreen...............................................................................................2-8
Scroll bars.................................................................................................................................2-8
Enter information.......................................................................................................................2-9
Adjust the backlight brightness and dimmer............................................................................ 2-10
Event messages......................................................................................................................2-11
Screen descriptions............................................................................................................ 2-12
Home screen...........................................................................................................................2-12
Menu overview........................................................................................................................2-22
Trigger menu...........................................................................................................................2-45
Scripts menu...........................................................................................................................2-47
System menu..........................................................................................................................2-49
Examples in this manual.................................................................................................... 2-55
Display features ................................................................................................................. 2-55
Setting the number of displayed digits....................................................................................2-55
Setting the display format........................................................................................................2-56
Customizing a message for the USER swipe screen.............................................................. 2-58
Creating messages for interactive prompts.............................................................................2-59
Saving screen captures to a USB flash drive.......................................................................... 2-59
Dimensions ........................................................................................................................ 2-60
Handle and bumpers.......................................................................................................... 2-62
Removing the handle and bumpers ........................................................................................2-62
Remote communications interfaces................................................................................... 2-64
Supported remote interfaces...................................................................................................2-64
Comparison of the communications interfaces........................................................................2-65
GPIB setup..............................................................................................................................2-66
LAN communications..............................................................................................................2-70
USB communications..............................................................................................................2-78
Model DMM7510 web interface...............................................................................................2-82
How to install the Keithley I/O Layer.......................................................................................2-88
Table of Contents

Table of Contents
Model DMM7510 7½ Digit Graphical Sampling Multimeter
Reference Manual
Modifying, repairing, or removing Keithley I/O Layer software................................................2-89
Determining the command set you will use ....................................................................... 2-89
System information ............................................................................................................ 2-90
Instrument sounds.............................................................................................................. 2-91
Test connections................................................................................................................ 2-92
Basic connections...................................................................................................................2-93
Front- or rear-panel test connections......................................................................................2-93
DMM measurement overview ............................................................................................ 2-94
DMM measurement capabilities..............................................................................................2-95
Warmup time...........................................................................................................................2-95
High-energy circuit safety precautions....................................................................................2-95
DC voltage measurements......................................................................................................2-96
AC voltage measurements......................................................................................................2-99
DC current measurements....................................................................................................2-100
AC current measurements ....................................................................................................2-102
Resistance measurements....................................................................................................2-104
Continuity measurements......................................................................................................2-113
Frequency measurements.....................................................................................................2-115
Period measurements...........................................................................................................2-116
Diode measurements............................................................................................................2-118
Temperature measurements.................................................................................................2-120
Capacitance measurements..................................................................................................2-122
DC voltage ratio measurements............................................................................................2-124
Digitize functions................................................................................................................... 2-127
Display results of two measure functions.............................................................................. 2-133
Displayed measurements...................................................................................................... 2-134
Using Quick Setups...............................................................................................................2-135
Auto Delay........................................................................................................................ 2-137
Voltage autodelay and autorange times................................................................................2-138
Current autodelay and autorange times................................................................................ 2-138
Resistance autodelay and autorange times..........................................................................2-139
Frequency and period autodelay and autorange times.........................................................2-139
Temperature autodelay and autorange times........................................................................2-139
Capacitance autodelay and autorange times........................................................................2-140
Diode autodelay and autorange times...................................................................................2-140
DCV ratio autodelay and autorange times ............................................................................2-140
Detector bandwidth .......................................................................................................... 2-140
Graphing .......................................................................................................................... 2-141
Setting up the Graph tab.......................................................................................................2-141
Using the Graph tab..............................................................................................................2-146
Binning data with the Histogram ...................................................................................... 2-148
Setting up the Histogram....................................................................................................... 2-148
Automatic reference measurements................................................................................ 2-149
Setting autozero....................................................................................................................2-150
Saving setups................................................................................................................... 2-150
Save a user setup to internal memory...................................................................................2-151
Save a user setup to a USB flash drive.................................................................................2-151
Copy a user setup.................................................................................................................2-152
Delete a user setup...............................................................................................................2-152
Recall a user setup ...............................................................................................................2-152
Define the setup used when power is turned on...................................................................2-153
Using the event log .......................................................................................................... 2-154
Information provided for each event log entry.......................................................................2-154

Model DMM7510
7½ Digit Graphical Sampling Multimeter Reference Manual Table
of Contents
Event log settings..................................................................................................................2-154
Effects of errors on scripts.....................................................................................................2-155
Resets.............................................................................................................................. 2-155
Reset the instrument.............................................................................................................2-156
Functions and features ............................................................................................3-1
Instrument access................................................................................................................ 3-1
Changing the instrument access mode.....................................................................................3-2
Changing the password ............................................................................................................3-2
Switching control interfaces.......................................................................................................3-3
Ranges................................................................................................................................. 3-3
Selecting the automatic measurement range............................................................................3-4
Relative offset ...................................................................................................................... 3-4
Establishing a relative offset value............................................................................................3-5
Calculations that you can apply to measurements.............................................................. 3-7
mx+b ......................................................................................................................................... 3-7
Percent......................................................................................................................................3-8
Reciprocal (1/X) ........................................................................................................................3-8
Setting percent math operations ...............................................................................................3-9
Setting mx+b math operations ..................................................................................................3-9
Setting reciprocal math operations..........................................................................................3-10
Switching math on the SETTINGS swipe screen....................................................................3-10
Filtering measurement data ............................................................................................... 3-11
Repeating average filter..........................................................................................................3-11
Moving average filter...............................................................................................................3-11
Filter window...........................................................................................................................3-12
Setting up the averaging filter..................................................................................................3-12
Reading buffers.................................................................................................................. 3-13
Getting started with buffers.....................................................................................................3-13
Remote buffer operation .........................................................................................................3-30
Saving front-panel settings into a macro script.................................................................. 3-35
Recording a macro script........................................................................................................ 3-36
Running a macro script...........................................................................................................3-36
Front-panel macro recording limitations..................................................................................3-37
Configuration lists............................................................................................................... 3-37
Instrument configuration..........................................................................................................3-37
What is a configuration list? ....................................................................................................3-37
What is a configuration index?................................................................................................ 3-38
What settings are stored in a configuration list?......................................................................3-38
Creating, storing, and performing operations on configuration lists and indexes.................... 3-39
Using the front panel for configuration list operations.............................................................3-39
Using remote commands for configuration list operations.......................................................3-43
Saving a configuration list.......................................................................................................3-43
Auto calibration .................................................................................................................. 3-44
Running auto calibration .........................................................................................................3-44
Scheduling auto calibration.....................................................................................................3-45
Reviewing calibration information............................................................................................3-46
Monitoring internal temperature ..............................................................................................3-47
Digital I/O ........................................................................................................................... 3-47
Digital I/O connector and pinouts............................................................................................3-48
Digital I/O port configuration....................................................................................................3-49
Digital I/O lines........................................................................................................................3-51
Remote digital I/O commands.................................................................................................3-55

Table of Contents
Model DMM7510 7½ Digit Graphical Sampling Multimeter
Reference Manual
Digital I/O bit weighting ...........................................................................................................3-57
Digital I/O programming examples..........................................................................................3-57
External I/O ........................................................................................................................ 3-59
Setting up the external I/O.......................................................................................................3-59
External trigger I/O pinouts......................................................................................................3-60
Remote external I/O commands..............................................................................................3-61
Measurement methods ...................................................................................................... 3-62
Continuous measurement triggering.......................................................................................3-62
Trigger key triggering..............................................................................................................3-62
Trigger model triggering..........................................................................................................3-62
Switching between measurement methods.............................................................................3-63
Triggering........................................................................................................................... 3-63
Command interface triggering.................................................................................................3-63
Triggering using hardware lines..............................................................................................3-64
Analog triggering overview......................................................................................................3-64
LAN triggering overview..........................................................................................................3-69
Trigger timers..........................................................................................................................3-70
Event blenders........................................................................................................................3-73
Interactive triggering................................................................................................................3-74
Trigger model..................................................................................................................... 3-76
Trigger model blocks...............................................................................................................3-76
Predefined trigger models.......................................................................................................3-93
Assembling trigger model blocks.............................................................................................3-95
Running the trigger model.......................................................................................................3-97
Using trigger events to start actions in the trigger model ........................................................3-99
Limit testing and binning .................................................................................................. 3-102
Limit testing using the front-panel interface...........................................................................3-102
TSP-Link System Expansion Interface ............................................................................ 3-104
TSP-Link connections...........................................................................................................3-105
TSP-Link nodes.....................................................................................................................3-106
Master and subordinates.......................................................................................................3-107
Initializing the TSP-Link system ............................................................................................3-108
Sending commands to TSP-Link nodes................................................................................3-108
Using the reset() command...................................................................................................3-109
Terminating scripts on the TSP-Link system.........................................................................3-109
Triggering using TSP-Link synchronization lines...................................................................3-109
Running simultaneous test scripts......................................................................................... 3-110
Using Model DMM7510 TSP-Link commands with other TSP-Link products........................3-115
TSP-Net ........................................................................................................................... 3-116
Using TSP-Net with any ethernet-enabled instrument ..........................................................3-117
Remote instrument events ....................................................................................................3-118
TSP-Net instrument commands: General device control ......................................................3-118
TSP-Net instrument commands: TSP-enabled device control..............................................3-118
Example: Using tspnet commands........................................................................................3-119
Measure considerations...........................................................................................4-1
Line cycle synchronization................................................................................................... 4-1
Using aperture or NPLCs to adjust speed and accuracy..................................................... 4-1
DMM resistance measurement methods............................................................................. 4-3
Constant-current source method...............................................................................................4-4
Ratiometric method................................................................................................................... 4-5
Low-level voltage measurement considerations.................................................................. 4-7
Thermoelectric potentials..........................................................................................................4-7

Model DMM7510
7½ Digit Graphical Sampling Multimeter Reference Manual Table
of Contents
Magnetic fields..........................................................................................................................4-9
Radio frequency interference..................................................................................................4-10
Shielding.................................................................................................................................4-10
Cable effects on dry-circuit ohms....................................................................................... 4-11
Cable effects...........................................................................................................................4-12
Solutions.................................................................................................................................4-14
Offset-compensated ohm calculations............................................................................... 4-14
Order of operations............................................................................................................ 4-15
Introduction to SCPI commands..............................................................................5-1
Introduction to SCPI............................................................................................................. 5-1
Command execution rules.........................................................................................................5-1
Command messages................................................................................................................5-1
SCPI command programming notes.................................................................................... 5-3
SCPI command formatting........................................................................................................5-3
Using the SCPI command reference.........................................................................................5-5
SCPI command reference.........................................................................................6-1
:FETCh?....................................................................................................................................6-1
:MEASure?................................................................................................................................ 6-4
:MEASure:DIGitize?..................................................................................................................6-7
:READ?.....................................................................................................................................6-9
:READ:DIGitize? .....................................................................................................................6-12
*RCL .......................................................................................................................................6-14
*SAV .......................................................................................................................................6-14
ACAL subsystem................................................................................................................ 6-15
:ACAL:COUNt? .......................................................................................................................6-15
:ACAL:LASTrun:TEMPerature:INTernal?................................................................................ 6-16
:ACAL:LASTrun:TEMPerature:DIFFerence?...........................................................................6-17
:ACAL:LASTrun:TIME?...........................................................................................................6-18
:ACAL:NEXTrun:TIME? ..........................................................................................................6-19
:ACAL:REVert.........................................................................................................................6-19
:ACAL:RUN.............................................................................................................................6-20
:ACAL:SCHedule ....................................................................................................................6-21
CALCulate subsystem........................................................................................................ 6-22
:CALCulate2:<function>:LIMit<Y>:AUDible.............................................................................6-22
:CALCulate2:<function>:LIMit<Y>:CLEar:AUTO.....................................................................6-23
:CALCulate2:<function>:LIMit<Y>:CLEar[:IMMediate]............................................................6-24
:CALCulate2:<function>:LIMit<Y>:FAIL?................................................................................6-26
:CALCulate2:<function>:LIMit<Y>:LOWer[:DATA]..................................................................6-27
:CALCulate2:<function>:LIMit<Y>:STATe...............................................................................6-29
:CALCulate2:<function>:LIMit<Y>:UPPer[:DATA]...................................................................6-30
:CALCulate[1]:<function>:MATH:FORMat...............................................................................6-31
:CALCulate[1]:<function>:MATH:MBFactor.............................................................................6-33
:CALCulate[1]:<function>:MATH:MMFactor............................................................................6-34
:CALCulate[1]:<function>:MATH:PERCent.............................................................................6-36
:CALCulate[1]:<function>:MATH:STATe.................................................................................6-37
DIGital subsystem.............................................................................................................. 6-38
:DIGital:LINE<n>:MODE .........................................................................................................6-38
:DIGital:LINE<n>:STATe.........................................................................................................6-40
:DIGital:READ?.......................................................................................................................6-41
:DIGital:WRITe <n>.................................................................................................................6-42