Keithley 2001 Manuale utente

Model 2001 Multimeter

Quick Reference Guide

Model 2001 Multimeter

Quick Reference Guide



1992, Keithley Instruments, Inc.

Cleveland, Ohio 44139

U.S.A.

Document Number: 2001-903-01 Rev. B

Table of Contents

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

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

Operation Summary....................................................6

Multiple Displays.......................................................11

Menu Structures........................................................13

Default Conditions....................................................32

Error and Status Messages .........................................48

IEEE-488.2 Common Commands and Queries...........56

SCPI Command Subsystems ...................................... 58

Safety Precautions

The following safety precautions should be observed before

using this product and any associated instrumentation. Al-

though 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 pre-

cautions 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 electric shock

and contact with hazardous live circuits.

Maintenance personnel

perform routine procedures on the

product to keep it operating, for example, setting the line volt-

age or replacing consumable materials. Maintenance proce-

dures are described in the manual. The procedures explicitly

state if the operator may perform them. Otherwise, they

should be performed only by service personnel.

Servicepersonnel

are trained to work on live circuits, and per-

form safe installations and repairs of products. Only properly

trained service personnel may perform installation and service

procedures.

Exercise extreme caution when a shock hazard is present. Le-

thal 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 30V RMS, 42.4V peak, or 60VDC are present.

A good

safety practice is to expect that hazardous 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 pre-

vented access and/or insulated from every connection point. In

some cases, connections must be exposed to potential human

contact. Product users in these circumstances must be trained

to protect themselves from the risk of electric shock. If the cir-

cuit is capable of operating at or above 1000 volts,

noconduc-

tive part of the circuit may be exposed.

As described in the International Electrotechnical Commis-

sion (IEC) Standard IEC 664, digital multimeter measuring

circuits (e.g., Keithley Models 175A, 199, 2000, 2001, 2002,

and 2010) are Installation Category II.All other instruments’

signal terminals are Installation Category 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 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, 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.

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 sys-

tem and discharge any capacitors before: connecting or dis-

connecting cables or jumpers, installing or removing

switching cards, or making internal changes, such as install-

ing or removing jumpers.

Donot touchanyobject thatcould provide a currentpath tothe

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 accordance

with its speciﬁcations and operating instructions or the safety

of 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 same type and

rating for continued protection against ﬁre hazard.

Chassisconnections must onlybeused asshieldconnections 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 us-

ing 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 combined effect of

normal and common mode voltages. Use standard safety pre-

cautions to avoid personal contact with these voltages.

The

WARNING

heading in a manual explains dangers that

might result in personal injury or death.Always read the asso-

ciated information very carefully before performing the indi-

cated procedure.

The

CAUTION

heading in a manual explains hazards that

could damage the instrument. Such damage may invalidate the

warranty.

Instrumentation and accessories shall not be connected to hu-

mans.

Before performing any maintenance, disconnect the line cord

and all test cables.

To maintain protection from electric shock and ﬁre, replace-

ment components in mains circuits, including the power trans-

former, 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 ac-

curacy 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., data acquisition

board for installation into a computer) should never require

cleaning if handled according to instructions. If the board be-

comes contaminated and operation is affected, the board

should be returned to the factory for proper cleaning/servic-

ing.

2/99

Introduction

This quick reference guide includes summary informa-

tion on front panel and IEEE-488 operation for the

Model 2001 Multimeter. For detailed information, con-

sult the Model 2001 Operator’s Manual, the Model

2001 Calibration Manual, and the Model 2001-SCAN

Scanner Card Instruction 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.

Operation Summary

Default Conﬁguration

The Model 2001 can save from one to ten user setups in

memory, depending on the installed memory option.

You can select one of the user setups as the power-on

default, or have the instrument power up to either of the

two factory defaults (optimized for “BENCH” or “GPIB”

operation). Reset the instrument to “BENCH” defaults

from the front panel by performing the following steps:

1. Press the MENU key to display the main menu:

MAIN MENU

SAVESETUP GPIB CALIBRATION

TEST LIMITS STATUS-MSG GENERAL

2. If the SAVESETUP option is not blinking, press the

key until it is blinking and then press ENTER to

view the setup menu:

SETUP MENU

SAVE RESTORE POWERON RESET

3. Select the RESET option and press ENTER to view

the reset menu:

RESET ORIGINAL DFLTS

BENCH GPIB

4. Select the BENCH option and press ENTER. The

following message is displayed:

RESETTING INSTRUMENT

ENTER to conÞrm; EXIT to abort

5. Press ENTER to conﬁrm. The display will show DC

voltage readings with autorange enabled.

Assuming the Model 2001 is set to primary address 16,

the instrument can be reset and the reading displayed

on the computer CRT from the IEEE-488 bus with the

following code fragment:

100 OUTPUT 716;“:syst:pres”

110 OUTPUT 716;“:fetc?”

120 ENTER 716;A$

130 PRINT A$

Instrument Connections

Each measurement function has an appropriate connec-

tion scheme. Connections for all functions can be found

in Section 3 of the Model 2001 Operator’s Manual. The

following steps summarize making DC voltage mea-

surements with the Model 2001:

1. Select the front input jacks with the INPUTS button

(outer position for front jacks, inner position for

rear).

2. Using the set of supplied test leads, connect the

Model 2001 to a DC voltage source (e.g., a battery)

as shown in Figure 1.

3. Use the RANGE keys to select autoranging or a

manual range. Pressing the AUTO range key tog-

gles autoranging. You can select a different range

with the RANGE and RANGE keys. The fol-

lowing code statement enables autoranging on the

DCV function:

100 OUTPUT 716;“:volt:dc:rang:auto on”

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