Keithley 2000 Manual de usuario

Model 2000

Multimeter

Quick Reference Guide

title page/TOC Page 1 Thursday, December 23, 1999 7:59 AM

Model 2000 Multimeter

Quick Reference Guide



1995, Keithley Instruments, Inc.

Cleveland, Ohio, U.S.A.

Second Printing, December 1999

Document Number: 2000-903-01 Rev. B

title page/TOC Page 3 Thursday, December 23, 1999 7:59 AM

Table of Contents

Safety Precautions....................................................... 1

Introduction ................................................................ 5

Front Panel Operation Summary ................................. 6

Remote Operation Summary..................................... 22

title page/TOC Page 5 Thursday, December 23, 1999 7:59 AM

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

2000-903-01A Page 1 Thursday, December 23, 1999 7:52 AM

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.

2000-903-01A Page 2 Thursday, December 23, 1999 7:52 AM

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

2000-903-01A Page 3 Thursday, December 23, 1999 7:52 AM

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

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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.

2000-903-01A Page 5 Thursday, December 23, 1999 7:52 AM

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

▲

and

▼

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

▲

and

▼

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

2000-903-01A Page 6 Thursday, December 23, 1999 7:52 AM

INPUTS switch in the REAR position. Note that current

(DCI and ACI) measurements cannot be made from the

rear panel terminals.

MULTIMETER

RANGE

500V

PEAK

FRONT/REAR

2A 250V

AMPS

INPUT

SENSE

Ω4 WIRE

INPUTS

350V

PEAK

1100V

PEAK

AUTO

RANGE

Model 2000

Measure DCV, ACV,

Ω2, FREQ (PERIOD)

or TEMP *

* Temperature measurements are typically

performed through a thermocouple

scanner card, such as the Model 2001-TCSCAN.

See the User's Manual for details.

MULTIMETER

RANGE

500V

PEAK

FRONT/REAR

2A 250V

AMPS

INPUT

SENSE

Ω4 WIRE

INPUTS

350V

PEAK

1100V

PEAK

AUTO

RANGE

Model 2000

Measure

DCI or ACI

MULTIMETER

RANGE

500V

PEAK

FRONT/REAR

2A 250V

AMPS

INPUT

SENSE

Ω4 WIRE

INPUTS

350V

PEAK

1100V

PEAK

AUTO

RANGE

Model 2000

Measure

Ω4

Figure 1. Basic measurement connections

2000-903-01A Page 7 Thursday, December 23, 1999 7:52 AM

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