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Model 2000 Multimeter
Quick Reference Guide
2000-903-01 Rev.B / December 1999
A G R E A T E R M E A S U R E O F C O N F I D E N C E
Model 2000 Multimeter
Quick Reference Guide
1995, Keithley Instruments, Inc.
All rights reserved.
Cleveland, Ohio, U.S.A.
Second Printing, December 1999
Document Number: 2000-903-01 Rev. B
Table of Contents
Safety Precautions ....................................................... 1
Introduction ................................................................ 5
Front Panel Operation Summary ................................. 6
Remote Operation Summary ..................................... 22
Safety Precautions
The following safety precautions should be observed be-
fore using this product and any associated instrumenta-
tion. Although some instruments and accessories would
normally be used with non-hazardous 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
the operating information carefully before using the
product.
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 elec-
tric shock and contact with hazardous live circuits.
Maintenance personnel perform routine procedures on
the product to keep it operating, for example, setting the
line voltage or replacing consumable materials.
Maintenance procedures are described in the manual.
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, and
perform safe installations and repairs of products. Only
properly trained service personnel may perform installa-
tion and service procedures.
Exercise extreme caution when a shock hazard is present.
Lethal voltage may be present on cable connector jacks or
1
test fixtures. The American National Standards Institute
(ANSI) states that a shock hazard exists when voltage lev-
els greater than 30V RMS, 42.4V peak, or 60VDC are
present. A good safety practice is to expect that hazard-
ous voltage is present in any unknown circuit before
measuring.
Users of this product must be protected from electric
shock at all times. The responsible body must ensure that
users are prevented access and/or insulated from every
connection point. In some cases, connections must be ex-
posed to potential human contact. Product users in these
circumstances must be trained to protect themselves from
the risk of electric shock. If the circuit is capable of oper-
ating at or above 1000 volts, no conductive part of the
circuit may be exposed.
As described in the International Electrotechnical Com-
mission (IEC) Standard IEC 664, digital multimeter mea-
suring circuits (e.g., Keithley Models 175A, 199, 2000,
2001, 2002, and 2010) are Installation Category II. All
other instruments' signal terminals are Installation Cate-
gory I and must not be connected to mains.
Do not connect switching cards directly to unlimited
power circuits. They are intended to be used with imped-
ance 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, make sure 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.
2
For maximum safety, do not touch the product, test cables,
or any other instruments while power is applied to the cir-
cuit under test. ALWAYS remove power from the entire
test system and discharge any capacitors before: connect-
ing or disconnecting cables or jumpers, installing or re-
moving 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.
The instrument and accessories must be used in accor-
dance with its specifications and operating instructions
or the safety of the equipment may be impaired.
Do not exceed the maximum signal levels of the instru-
ments and accessories, as defined in the specifications
and operating information, and as shown on the instru-
ment or test fixture panels, or switching card.
When fuses are used in a product, replace with same type
and rating for continued protection against fire hazard.
Chassis connections must only be used as shield connec-
tions for measuring circuits, NOT as safety earth 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 safety earth ground
using the wire recommended in the user documentation.
The ! symbol on an instrument indicates that the user
should refer to the operating instructions located in the
manual.
The symbol on an instrument shows that it can
source or measure 1000 volts or more, including the
3
combined effect of normal and common mode voltages.
Use standard safety precautions to avoid personal con-
tact with these voltages.
The WARNING heading in a manual explains dangers
that might result in personal injury or death. Always read
the associated information very carefully before perform-
ing the indicated procedure.
The CAUTION heading in a manual explains hazards that
could damage the instrument. Such damage may invali-
date 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, re-
placement components in mains circuits, including the
power transformer, test leads, and input jacks, must be pur-
chased from Keithley Instruments. Standard fuses, with ap-
plicable 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 functional-
ity 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.,
data acquisition board for installation into a computer)
should never require cleaning if handled according to in-
structions. If the board becomes contaminated and oper-
ation is affected, the board should be returned to the
factory for proper cleaning/servicing.
10-99
4
Introduction
This quick reference guide includes summary informa-
tion on front panel and remote operation for the Model
2000 Multimeter. For detailed operating information,
consult the Model 2000 User's Manual.
All Keithley product names are trademarks or registered trade-
marks of Keithley Instruments, Inc.
Other brand and product names are trademarks or registered
trademarks of their respective holders.
5
Front Panel
Operation Summary
Power-on defaults
Power-on defaults are those settings the instrument
assumes when it is turned on. The Model 2000 offers
two choices for the settings: user or factory. With user,
the instrument will power-on to the last configuration
that you saved. With factory, the instrument will power
on to the factory default settings.
To store a user configuration in memory:
1. Configure the instrument as desired for USER
default.
2. Press SHIFT and then SAVE.
3. Use the L and M keys to select YES or NO.
Note: Select NO if you do not wish to change the
last configuration that you saved.
4. Press ENTER.
To restore factory or user settings:
1. Press SHIFT and then SETUP.
2. Use the L and M keys to select FACTory or USER.
3. Press ENTER.
NOTE: Factory default settings are listed in Table 2.
Instrument connections
Basic connections for Model 2000 measurements are
shown in Figure 1. These drawings show connections to
the front panel terminals (INPUTS switch in the FRONT
position). If using the rear panel terminals, place the
6
INPUTS switch in the REAR position. Note that current
(DCI and ACI) measurements cannot be made from the
rear panel terminals.
Model 2000
SENSE
4 WIRE INPUT
HI
Measure DCV, ACV,
350V
PEAK
! 1100V
PEAK 2, FREQ (PERIOD)
0 MULTIMETER or TEMP *
LO 500V
PEAK
INPUTS
RANGE F R
* Temperature measurements are typically
AUTO
RANGE
FRONT/REAR
2A 250V
AMPS
performed through a thermocouple
scanner card, such as the Model 2001-TCSCAN.
See the User's Manual for details.
Model 2000
SENSE
4 WIRE INPUT
HI
350V ! 1100V
PEAK PEAK
0 MULTIMETER
LO 500V
PEAK
Measure
RANGE F
INPUTS
R
DCI or ACI
AUTO FRONT/REAR
2A 250V
RANGE AMPS
Model 2000
SENSE
4 WIRE INPUT
HI
350V ! 1100V
R Measure
4
PEAK PEAK
0 MULTIMETER
LO 500V
PEAK
INPUTS
RANGE F R
AUTO FRONT/REAR
2A 250V
RANGE AMPS
Figure 1. Basic measurement connections
7
For resistance measurements (2 and 4) greater than
100k, more stable readings can be achieved by using
shielding. Place the resistance in a shielded enclosure
and connect the shield to INPUT LO. Shielded cable
should be used such that the shield (INPUT LO) encir-
cles the other cable conductor(s).
Maximum inputs for the Model 2000 are summarized in
Table 1.
Table 1. Maximum inputs
Function Maximum input
DCV 1000V peak
ACV 750V rms, 1000V peak, 8