Tektronix KEITHLEY 2750 User manual

User’s Manual
2750-900-01 Rev. G June 2023
*P2750-900-01G*
2750-900-01G
tek.com/keithley
Model 2750
Multimeter/Switch System

Multimeter/Switch System
User's Manual
Model 2750

© 2023, Keithley Instruments, LLC
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, LLC, is strictly prohibited.
These are the original instructions in English.
All Keithley Instruments product names are trademarks or registered trademarks of Keithley
Instruments, LLC. Other brand names are trademarks or registered trademarks of their
respective holders.
Microsoft, Visual C++, Excel, and Windows are either registered trademarks or trademarks of
Microsoft Corporation in the United States and/or other countries.
Document number: 2750-900-01 Rev. G June 2023

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 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 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. Maximum signal levels are defined in the
specifications and operating information and shown on the instrument panels, test fixture panels, and switching cards.
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 hazard. 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 warning, 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 hazards that might result in personal injury or death. Always read
the associated information very carefully before performing the indicated procedure.
The CAUTION heading in the user documentation explains hazards that could damage the instrument. Such damage may
invalidate the warranty.
The CAUTION heading with the symbol in the user documentation explains hazards that could result in moderate or minor
injury or damage the instrument. Always read the associated information very carefully before performing the indicated
procedure. Damage to the instrument 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. Standard fuses with applicable national safety
approvals may be used if the rating and type are the same. The detachable mains power cord provided with the instrument may
only be replaced with a similarly rated power cord. 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 to maintain accuracy and functionality of the product). If you are unsure about the applicability of a replacement
component, call a Keithley office for information.
Unless otherwise noted in product-specific literature, Keithley instruments are designed to operate indoors only, in the following
environment: Altitude at or below 2,000 m (6,562 ft); temperature 0 °C to 50 °C (32 °F to 122 °F); and pollution degree 1 or 2.
To clean an instrument, use a cloth dampened with deionized water 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 June 2018.

Introduction...............................................................................................................1-1
Welcome .............................................................................................................................. 1-1
Extended warranty ............................................................................................................... 1-1
Contact information.............................................................................................................. 1-1
Customer documentation..................................................................................................... 1-2
Product software and drivers ............................................................................................... 1-2
What you should have received........................................................................................... 1-3
About this manual ................................................................................................................ 1-3
General ratings..................................................................................................................... 1-4
Installation.................................................................................................................2-1
Introduction .......................................................................................................................... 2-1
Switching module installation and connections ................................................................... 2-1
Module installation ....................................................................................................................2-2
Connections..............................................................................................................................2-2
Turning the instrument on and off........................................................................................ 2-3
Power-up sequence ............................................................................................................. 2-4
Warmup period..................................................................................................................... 2-5
Identifying installed switching modules................................................................................ 2-5
Keyclick................................................................................................................................ 2-5
Display.................................................................................................................................. 2-6
Status and error messages.................................................................................................. 2-6
Defaults and user setups ..................................................................................................... 2-6
Saving a user setup ..................................................................................................................2-7
Saving a power-on setup ..........................................................................................................2-7
Restoring a setup......................................................................................................................2-8
Default settings .........................................................................................................................2-8
Instrument description.............................................................................................3-1
Front panel........................................................................................................................... 3-1
1 Special keys and power switch ..............................................................................................3-1
2 Function and operation keys..................................................................................................3-2
3 Range keys............................................................................................................................3-3
4 Display annunciators..............................................................................................................3-4
5 Slot indicators.........................................................................................................................3-5
6 INPUTS switch....................................................................................................................... 3-5
7 Front-panel inputs.................................................................................................................. 3-5
Rear panel............................................................................................................................ 3-5
Table of contents

Table of contents
Model 2750 Multimeter/Switch System
User's Manual
Operation...................................................................................................................4-1
Introduction .......................................................................................................................... 4-1
Basic DMM measurements using front-panel inputs.................................................................4-2
Closing and opening channels using system channel operation...............................................4-3
Simple scanning........................................................................................................................ 4-5
Basic DMM operation........................................................................................................... 4-7
DMM measurement capabilities................................................................................................4-8
High energy circuit safety precautions ......................................................................................4-9
Voltage measurements (DCV and ACV).................................................................................4-10
Current measurements (DCI and ACI)....................................................................................4-14
Resistance measurements (Ω2 and Ω4) .................................................................................4-16
Temperature measurements...................................................................................................4-25
Frequency and period measurements..................................................................................... 4-36
Continuity testing..................................................................................................................... 4-39
Range................................................................................................................................. 4-40
Measurement ranges and maximum readings........................................................................ 4-41
Relative offset .................................................................................................................... 4-41
Rate.................................................................................................................................... 4-42
Switch module channel operation...........................................................................5-1
Closing and opening switching module channels................................................................ 5-1
Close/open overview............................................................................................................ 5-1
Channel assignments........................................................................................................... 5-3
System channel operation ................................................................................................... 5-3
2-wire functions.........................................................................................................................5-4
4-wire functions (paired channels) ............................................................................................5-5
Controlling the system channel.................................................................................................5-6
Non-amp and non-measure switching modules........................................................................5-9
Identifying installed modules................................................................................................ 5-9
CARD menu............................................................................................................................5-10
Maintenance..............................................................................................................6-1
Introduction .......................................................................................................................... 6-1
Finding the serial number of the instrument......................................................................... 6-1
AMPS fuse replacement (front-panel AMPS input) ............................................................. 6-2
Setting line voltage and replacing fuse................................................................................ 6-3
Status and error messages......................................................................................7-1
Status and error messages.................................................................................................. 7-1
Next steps .................................................................................................................8-1
Additional 2750 information ................................................................................................. 8-1

In this section:
Welcome.................................................................................. 1-1
Extended warranty................................................................... 1-1
Contact information.................................................................. 1-1
Customer documentation......................................................... 1-2
Product software and drivers.................................................... 1-2
What you should have received............................................... 1-3
About this manual .................................................................... 1-3
General ratings......................................................................... 1-4
Welcome
Thank you for choosing a Keithley Instruments product. The Model 2750 combines precision
measurement, switching, and control in a tightly integrated enclosure for benchtop
applications. The Model 2750 offers extended low ohms measurement capability and
supports up to five 7700 switch cards for a maximum of 200, 2-pole multiplexed channels. It
also contains a built-in 20 mV clamp that helps protect sensitive devices from damage and
prevents self-heating errors during dry circuit testing.
This manual describes basic operation of the Model 2750.
Extended warranty
Additional years of warranty coverage are available on many products. These valuable
contracts protect you from unbudgeted service expenses and provide additional years of
protection at a fraction of the price of a repair. Extended warranties are available on new
and existing products. Contact your local Keithley Instruments office, sales partner, or
distributor for details.
Contact information
If you have any questions after you review the information in this documentation, please
contact your local Keithley Instruments office, sales partner, or distributor. You can also call
the Tektronix corporate headquarters (toll-free inside the U.S. and Canada only) at
1-800-833-9200. For worldwide contact numbers, visit tek.com/contact-tek.
Section 1
Introduction

Section
1: Introduction Model 2750 Multimeter/Switch System
User's Manual
1-2 2750-900-01 Rev. G June 2023
Customer documentation
The documentation for the 2750 includes a User's Manual and Reference Manual. You can
access them from tek.com/keithley.
•User's Manual: Includes installation, instrument description, operation, and
maintenance information.
•Reference Manual: Includes advanced operation topics and maintenance information.
Programmers looking for a command reference and users looking for an in-depth
description of how the instrument works should refer to the Reference Manual.
Product software and drivers
Go to the Product Support and Downloads web page to download drivers and software for
your instrument.
Available drivers and software include:
•KickStart Software: Enables quick test setup and data visualization when using one or
more instruments.
•IVI-COM Driver: An IVI instrument driver you can use to create your own test
applications in C/C++, VB.NET, or C# programming languages. It can also be called
from other languages that support calling a DLL or ActiveX (COM) object. Refer to IVI
Foundation (ivifoundation.org) for additional information.
•LabVIEW™Software drivers: Drivers to communicate with NITM LabVIEWTM Software.
•Keithley I/O layer: Manages the communications between Keithley instrument drivers
and software applications and the instrument itself. The I/O Layer handles differences in
communications required to support GPIB, serial, ethernet, and other communications
buses so that drivers and software applications do not need to handle the differences
themselves.

Model 2750
Multimeter/Switch System User's Manual Section 1:
Introduction
2750-900-01 Rev. G June 2023 1-3
What you should have received
Model 2750 was carefully inspected electrically and mechanically before shipment. After
unpacking all items from the shipping carton, check for any obvious signs of physical
damage that may have occurred during transit. There may be a protective film over the
display lens, which you can remove. Report any damage to the shipping agent immediately.
Save the original packing carton for possible future shipment.
The following items are included with every Model 2750 order:
•Model 2750 with line cord
•Safety test leads
•Accessories as ordered
•Certificate of calibration
About this manual
This manual provides installation and basic operating information for the 2750. It includes:
Installation: Installation and power up information.
Instrument description: Descriptions of the options on the instrument front and
rear panels.
Operation: Basic operating information and quick start exercises.
Switch module channel operation: Basic information on using the front panel to
control switching.
Maintenance: Information on finding the serial number of the instrument, replacing the
fuses, and setting the line voltage.
Status and error messages: The status and event numbers and messages.
Next steps: Provides information on additional resources for using your
Model 2750 instrument.

Section
1: Introduction Model 2750 Multimeter/Switch System User's Manua
l
1-4 2750-900-01 Rev. G June 2023
General ratings
Category Specification
Power supply
100 V / 120 V / 220 V / 240 V
Line frequency
50 Hz to 60 Hz and 400 Hz, automatically sensed at power-up
Input and output connections
See Front panel (on page 3-1) and Rear panel (on page 3-5)
Environmental conditions
For indoor use only.
Altitude: Maximum 2,000 meters (6,562 feet) above sea level
Operating: 0 °C to 50 °C, 80% relative humidity up to 35 °C.
Storage: −40 °C to 70 °C

In this section:
Introduction...............................................................................2-1
Switching module installation and connections ........................2-1
Turning the instrument on and off.............................................2-3
Power-up sequence..................................................................2-4
Warmup period.........................................................................2-5
Identifying installed switching modules.....................................2-5
Keyclick ....................................................................................2-5
Display......................................................................................2-6
Status and error messages ......................................................2-6
Defaults and user setups..........................................................2-6
Introduction
This section provides the information you need to install switching modules, power on the
instrument, and save or restore setups.
Switching module installation and connections
To use switching functions, a switching module must be installed in the mainframe. A
switching module can be installed by the user, however external connections to the
switching module are only to be performed by qualified service personnel.
The following information is intended for qualified service personnel. Do not make module
connections unless qualified to do so.
To prevent electric shock that could result in serious injury or death, adhere to the following
safety precautions:
Before removing or installing a switch module in the mainframe, make sure the mainframe
is turned off and disconnected from line power.
Before making or breaking connections, make sure the power is removed from all
external circuitry.
Do not connect signals that may exceed the maximum specifications of the model or external
wiring. Complete specifications for the 2750 are available on tek.com/keithley.
Section 2
Installation

Section
2: Installation Model 2750 Multimeter/Switch System
User's Manual
2-2 2750-900-01 Rev. G June 2023
Module installation
Slot covers must be installed on unused slots to prevent personal contact with high-voltage
circuits. Failure to recognize and observe standard safety precautions could result in
personal injury or death due to electric shock.
To install a switching module into the Model 2750:
1. Turn the Model 2750 off.
2. Disconnect the power line cord and any other cable connected to the rear panel.
3. Position the Model 2750 so you are facing the rear panel.
4. Remove the slot cover plate from the mainframe slot. Retain the plate and screws for
future use.
5. With the top cover of the switching module facing up, slide the module into an empty
slot. For the last ¼ inch, press in firmly to mate the module connector to the mainframe
connector.
6. On each side of the module, there is a mounting screw. Tighten these two screws to
secure the module to the mainframe. Do not overtighten.
7. Reconnect the power line cable and any other cables to the rear panel.
8. Turn on the Model 2750. The model number of the switching module is briefly displayed.
Connections
If the front-panel terminals and the switching module terminals are connected at the same
time, the test lead insulation must be rated to the highest voltage that is connected. For
example, if 1000 V is connected to the front-panel input, the test lead insulation for the
switching module must also be rated for 1000 V.
Dangerous arcs of an explosive nature in a high energy circuit can cause severe personal
injury or death. If the multimeter is connected to a high energy circuit when set to a current
range, low resistance range, or any other low impedance range, the circuit is virtually
shorted. Dangerous arcing can result even when the multimeter is set to a voltage range if the
minimum voltage spacing is reduced in the external connections. For details on how to safely
make high energy measurements, see High energy circuit safety precautions (on page 4-9).
As described in the International Electrotechnical Commission (IEC) Standard IEC 664, the
Model 2750 is Installation Category I and must not be connected to mains.
For the switching modules, detailed connection and wiring information is provided in the
documentation for the switching module, available at tek.com/keithley.

Model 2750
Multimeter/Switch System User's Manual Section 2:
Installation
2750-900-01 Rev. G June 2023 2-3
Turning the instrument on and off
The 2750 operates from a line voltage of 100 V to 240 V at a frequency of 50 Hz or 60 Hz.
Make sure the operating voltage in your area is compatible. The 2750 operates at line
frequencies from 45 Hz to 66 Hz, and 360 Hz to 440 Hz. There are no user settings for line
frequency. It is automatically sensed at power-up.
Follow the procedure below to connect the 2750 to line power and turn on the instrument.
Operating the instrument on an incorrect line voltage may cause damage to the instrument,
possibly voiding the warranty.
To turn a 2750 on and off:
1. Verify that the line voltage shown in the window of the fuse holder assembly is correct
for the operating voltage in your area. The window is shown in the following figure.
Figure 1: 2750 power module
If the line voltage is not correct, refer to Setting line voltage and replacing fuse (on
page 6-3).

Section
2: Installation Model 2750 Multimeter/Switch System
User's Manual
2-4 2750-900-01 Rev. G June 2023
2. Make sure that the front-panel POWER switch is in the off (O) position.
3. Connect the socket end of the supplied power cord to the AC receptacle on the
rear panel.
4. Connect the other end of the power cord to a grounded AC outlet.
The power cord supplied with the 2750 contains a separate protective earth (safety ground)
wire for use with grounded outlets. When proper connections are made, the instrument
chassis is connected to power-line ground through the ground wire in the power cord.
5. To turn your instrument on, press the front-panel POWER switch to place it in the
on (I) position.
6. To turn your instrument off, press the front-panel POWER switch to place it in the
off (O) position.
Power-up sequence
On power-up, the Model 2750 performs self-tests on its EPROM and RAM and momentarily
lights all segments and annunciators. If a failure is detected, the instrument momentarily
displays an error message and the ERR annunciator turns on. Error messages are listed in
Status and error messages (on page 7-1).
If the instrument passes the self-tests, the firmware revision levels are displayed. An
example of this display is:
REV: A01 A01
The first A01 is the main board ROM revision and the second A01 is the display board
ROM revision.
The installed switching modules are then displayed. For example, if there is a Model 7700
switching module installed in all five slots, the following messages are displayed:
1: 7700 2: 7700
3: 7700 4: 7700
5: 7700
If a slot is empty, the message NONE is displayed instead.
If the saved power-on setup is not the factory defaults setup (:SYSTem:POSetup PRESet),
a message to identify the setup is briefly displayed. Refer to Defaults and user setups (on
page 2-6).
After the power-up sequence, the instrument begins its normal display of readings.

Model 2750
Multimeter/Switch System User's Manual Section 2:
Installation
2750-900-01 Rev. G June 2023 2-5
The serial number of the Model 2750 can be displayed by selecting the SNUM item of the
SETUP menu. Press SHIFT and then SETUP to access the menu.
Warmup period
After the Model 2750 is turned on, it must be allowed to warm up for at least two hours to
allow the internal temperature to stabilize. If the instrument has been exposed to extreme
temperatures, allow extra warmup time.
Identifying installed switching modules
On power-up, the model numbers of installed switching modules are displayed briefly. While
in the normal display state, slot indicators on the right side of the display indicate which slots
have a switching module or pseudocard installed.
If a Model 7700, 7701, 7702, 7703, 7705, 7708, or 7709 switching module is removed while
the Model 2750 is on, the slot indicator for that slot remains on and the instrument operates
as if the module is installed. That is, the Model 2750 operates as if the pseudocard
is installed.
If a Model 7706 or 7707 is removed while power is on, error +523, Card hardware error,
occurs and the module is removed from the system.
In general, it is not recommended to install or remove switching modules with the power on.
You can use the CARD menu to identify modules installed in the mainframe.
Keyclick
When keyclick is enabled, an audible click sounds when a front-panel key is pressed.
To disable or enable keyclick:
1. Press SHIFT and then LOCAL to display the present state of KEYCLICK (ON or OFF).
2. Press ▲ or ▼ to display the keyclick state and press ENTER.
Keyclick ON is the default for FACTORY, *RST, and :SYSTem:PRESet.

Section
2: Installation Model 2750 Multimeter/Switch System
User's Manual
2-6 2750-900-01 Rev. G June 2023
Display
Readings are displayed in engineering units, such as 100.23 mV, while annunciators
indicate various states of operation. Refer to Display annunciators (on page 3-4) for a
complete listing of display annunciators.
The display test allows you to test display digit segments, annunciators, and the red slot
indicator LEDs. The key test checks the functionality of front-panel keys. To access these
tests, press SHIFT and then TEST. Refer to the Model 2750 Service Manual for details.
Status and error messages
Status and error messages are displayed momentarily. During operation and programming,
you encounter a front-panel messages. Typical messages are either of status or error, as
listed in Status and error messages (on page 7-1).
Defaults and user setups
The 2750 can be restored to one of two default setup configurations (FACTory or *RST), or
three user-saved (SAV0, SAV1, or SAV2). As shipped from the factory, the 2750 powers up
to the factory (FACT) default settings.
Closed channels can be saved in a user setup (SAV0, SAV1, or SAV2). When the setup is
restored, those channels (and only those channels) are closed. The FACT and *RST
defaults open all channels.
The factory default setup provides continuous triggering, while the *RST default setup
places the 2750 in the one-shot trigger mode. With one-shot triggering, a measurement is
made whenever the TRIG key is pressed or an initiate command is sent over the
remote interface.
The factory and *RST default settings are listed in Default settings (on page 2-8).

Model 2750
Multimeter/Switch System User's Manual Section 2:
Installation
2750-900-01 Rev. G June 2023 2-7
For remote programming, the SYSTem:PRESet and *RST commands reset the instrument.
The *RST command returns the instrument to the *RST defaults. In most situations, the
SYSTem:PRESet command returns the instrument to the factory default conditions. The
exceptions are:
•Autoscan and autochannel configuration: FACTory defaults disable autoscan and
autochannel configuration. SYSTem:PRESet has no effect. The *RST defaults
(front-panel and remote operation) have no effect.
•Memory buffer autoclear: FACTory defaults enable buffer autoclear. SYSTem:PRESet
has no effect. The *RST defaults (front-panel and remote operation) have no effect.
The instrument powers up to whichever default setup is saved as the power-on setup.
At the factory, the factory default setup is saved as the SAV0, SAV1, or SAV2 setup.
Saving a user setup
To save a user setup:
1. Configure the 2750 for the measurement application.
2. Press SHIFT and then SAVE to access the save setup menu.
3. Press ► to place the cursor on the present setup (SAV0, SAV1, or SAV2).
4. Use the ▲ or ▼ key to display the setup and press ENTER. The instrument returns to
the normal measurement state.
If you make firmware upgrades, you lose all your saved settings.
Saving a power-on setup
To save a power-on setup:
1. Configure the 2750 for the measurement application.
2. Press SHIFT and then SAVE to access the save setup menu.
3. Press the ▲ key to display the present power-on (PWR-ON) setup: FACT, *RST, SAV0,
SAV1, or SAV2.
4. Press ► to place the cursor on the present power-on setup.
5. Use the ▲ or ▼ key to display the setup and press ENTER. The instrument returns to
the normal measurement state.

Section
2: Installation Model 2750 Multimeter/Switch System
User's Manual
2-8 2750-900-01 Rev. G June 2023
Restoring a setup
To restore a setup:
1. Press SHIFT and then SETUP to access the restore setup menu.
2. Press ► to place the cursor on the present RESTORE setup (FACT, *RST, SAV0,
SAV1, or SAV2).
3. Use the ▲ or ▼ key to display the setup and press ENTER. The instrument returns to
the normal measurement state.
If the settings for a user setup or power-on setup do not match the switching module types
presently installed in the Model 2750, error +520, Saved setup scancard mismatch, occurs
when the setup is recalled. The scan list resets to the factory defaults and all channels
open. However, the saved setup is retained and can be restored if the matching switching
module is later installed.
Default settings
The Set Diff column indicates that there are differences between the Factory and *RST
default setups.
Setting Factory *RST Set Diff
Autochannel configuration
No (off)
No effect
Yes
Autozero
On
On
Buffer
No effect
No effect
Autoclear
Yes (on)
No effect
Yes
Channel average
Off
Off
Closed channels
None
None
Closure count interval
No effect
No effect
Continuity
Beeper
On
On
Digits
4½ digits
4½ digits
Range
1 kΩ
1 kΩ
Rate
Fast (0.1 PLC)
Fast (0.1 PLC)
Threshold level
10 Ω
10 Ω
Current (AC and DC)
Bandwidth (AC)
30
30
Digits (AC)
5½ digits
5½ digits
Digits (DC)
6½ digits
6½ digits
Filter
On
Off
Yes
Window
0.1%
0.1%
Count
10
10
Type
Moving
Repeat
Yes

Model 2750
Multimeter/Switch System User's Manual Section 2:
Installation
2750-900-01 Rev. G June 2023 2-9
Setting Factory *RST Set Diff
Range
Auto
Auto
Rate (DC)
Slow (5 PLC)
Slow (5 PLC)
Rel
Off
Off
Dry circuit ohms
Off
Off
Frequency and Period
Digits
6½ digits
6½ digits
Range
10 V
10 V
Rate (aperture)
1 second
1 second
Rel
Off
Off
Function
DCV
GPIB
No effect
No effect
Address
No effect (16 at factory)
No effect (16 at factory)
Keyclick
On
On
Limits
Off
Off
LO Limit 1
−1
−1
HI Limit 1
+1
+1
LO Limit 2
−2
−2
HI Limit 2
+2
+2
Line Synchronization
Off
Off
Math
mX+B
Off
Off
Scale Factor
1.0
1.0
Offset
0.0
0.0
Units
"X"
"X"
Percent
Off
Off
Reference
1.0
1.0
1/X (Reciprocal)
Off
Off
Monitor
Off
Off
Output
Beeper
Never
Never
Digital Output
Off
Off
Logic Sense
High
High
Pulse
No (off)
No (off)
Ratio
Off
Off
Resistance (Ω2 and Ω4)
Digits
6½ digits
6½ digits
Filter
On
Off
Yes
Window
0.1%
0.1%
Count
10
10
Type
Moving
Repeat
3
Offset compensation (OCOMP)
Off
Off
Dry circuit
Off
Off
Range
Auto
Auto
Rate
Slow (5 PLC)
Slow (5 PLC)
Rel
Off
Off
RS-232
Off
Off
Baud rate
No effect
No effect
Flow control
XonXoFF
XonXoFF
Terminator
No effect
No effect