Keithley 2010 Service Manual

Model 2010

Multimeter

Service Manual

Contains Calibrating and Servicing Information

W ARRANTY

Keithley Instruments, Inc. warrants this product to be free from defects in material and workmanship for a
period of 3 years from date of shipment.

Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes,
cables, rechargeable batteries, diskettes, and documentation.

During the warranty period, we will, at our option, either repair or replace any product that proves to be
defective.

T o e xercise this w arranty, write or call your local K eithley representati v e, or contact K eithle y headquarters in
Cleveland, Ohio. You will be given prompt assistance and return instructions. Send the product, transporta­tion prepaid, to the indicated service facility. Repairs will be made and the product returned, transportation
prepaid. Repaired or replaced products are warranted for the balance of the original warranty period, or at
least 90 days.

LIMIT A TION OF W ARRANTY

This warranty does not apply to defects resulting from product modification without Keithley’s express writ­ten consent, or misuse of any product or part. This warranty also does not apply to fuses, software, non­rechargeable batteries, damage from battery leakage, or problems arising from normal wear or failure to fol­low instructions.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUD­ING ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE.
THE REMEDIES PROVIDED HEREIN ARE B UYER’S SOLE AND EXCLUSIVE REMEDIES.

NEITHER KEITHLEY INSTRUMENTS, INC. NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE
FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARIS­ING OUT OF THE USE OF ITS INSTRUMENTS AND SOFTWARE EVEN IF KEITHLEY INSTRU­MENTS, INC., HAS BEEN ADVISED IN ADVANCE OF THE POSSIBILITY OF SUCH DAMAGES.
SUCH EXCLUDED DAMAGES SHALL INCLUDE, BUT ARE NOT LIMITED TO: COSTS OF
REMOVAL AND INSTALLATION, LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY PER­SON, OR DAMAGE TO PROPERTY.

Keithley Instruments, Inc. • 28775 Aurora Road • Cleveland, OH 44139 • 440-248-0400 • Fax: [phone] • http://www.k eithley.com

BELGIUM: Keithley Instruments B.V. Bergensesteenweg 709 • B-1600 Sint-Pieters-Leeuw • 02/363 00 40 • Fax: [phone]
CHINA: Keithley Instruments China Y uan Chen Xin Building, Room 705 • 12 Yumin Road, Dewai, Madian • Beijing 100029 • 8610-62022886 • Fax: [phone]
FRANCE: Keithley Instruments Sarl B.P. 60 • 3, allée des Garays • 91122 Palaiseau Cédex • 01 64 53 20 20 • Fax: [phone]
GERMANY: Keithley Instruments GmbH Landsberger Strasse 65 • D-82110 Germering • 089/84 93 07-40 • Fax: [phone]
GREAT BRITAIN: Keithley Instruments Ltd The Minster • 58 Portman Road • Reading, Berkshire RG30 1EA • 0118-9 57 56 66 • Fax: [phone]
INDIA: Keithley Instruments GmbH Flat 2B, WILOCRISSA • 14, Rest House Crescent • Bangalore 560 001 • 91-80-509-1320/21 • Fax: [phone]
ITALY: Keithley Instruments s.r.l. Viale S. Gimignano, 38 • 20146 Milano • 02/48 30 30 08 • Fax: [phone]
NETHERLANDS: Keithley Instruments B.V. Postbus 559 • 4200 AN Gorinchem • 0183-635333 • Fax: [phone]
SWITZERLAND: Keithley Instruments SA Kriesbachstrasse 4 • 8600 Dübendorf • 01-821 94 44 • Fax: [phone]
TAIWAN: Keithley Instruments Taiwan 1 Fl. 85 Po Ai Street • Hsinchu, Taiwan, R.O.C. • 886-3572-9077• Fax: [phone]

6/99

Model 2010 Multimeter

Service Manual

©1996, Keithley Instruments, Inc.

All rights reserved.

Cleveland, Ohio, U.S.A.

Third Printing, September 1999

Document Number: 2010-902-01 Rev. C

Manual Print History

The print history shown below lists the printing dates of all Revisions and Addenda created
for this manual. The Revision Le vel letter increases alphabetically as the manual under goes sub­sequent updates. Addenda, which are released between Revisions, contain important change in­formation that the user should incorporate immediately into the manual. Addenda are numbered
sequentially . When a new Re vision is created, all Addenda associated with the previous Re vision
of the manual are incorporated into the new Revision of the manual. Each ne w Revision includes
a revised copy of this print history page.

Revision A (Document Number 2010-902-01)............................................................January 1996

Revision B (Document Number 2010-902-01)................................................................. June 1999

Addendum B (Document Number 2010-902-02).................................................... September 1999

Revision C (Document Number 2010-902-01)....................................................... September 1999

All Keithley product names are trademarks or registered trademarks of Keithley Instruments, Inc.
Other brand names are trademarks or registered trademarks of their respective holders.

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 non-hazardous v oltages, 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 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 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 installation and service procedures.
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 30V RMS, 42.4V peak, or 60VDC are present.

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 prevented 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 circuit is capable of operating at or above 1000 volts,

of the circuit may be exposed.

As described in the International Electrotechnical Commission (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 system and discharge an y capacitors before:
connecting or disconnecting cables or jumpers, installing or removing switching cards, or making internal
changes, such as installing or removing jumpers.

A good safety practice is to

no conductive part

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 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.
Chassis connections must only be used as shield connections 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 com­bined effect of normal and common mode voltages. Use standard safety precautions 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 associated information very carefully before performing the indicated 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 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.

T o clean an instrument, use a damp cloth or mild, water based cleaner . Clean the e xterior 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 becomes contaminated and op­eration is affected, the board should be returned to the factory for proper cleaning/servicing.

Rev. 2/99

T able of Contents

1

Performance Verification

Introduction......................................................................................... 1-2

Verification test requirements.............................................................. 1-3

Performing the verification test procedure..........................................1-6

Verifying DC voltage .......................................................................... 1-7

V erifying A C voltage........................................................................... 1-8

Verifying DC current......................................................................... 1-10

V erifying A C current.........................................................................1-11

Verifying resistance........................................................................... 1-12

Verifying temperature ....................................................................... 1-14

Verifying frequency........................................................................... 1-17

Verifying ratio ................................................................................... 1-18

2

Calibration

Introduction......................................................................................... 2-2

Environmental conditions...................................................................2-3

Calibration considerations................................................................... 2-4

Calibration code..................................................................................2-5

Comprehensive calibration..................................................................2-6

Front panel calibration........................................................................2-8

Remote calibration............................................................................2-16

Manufacturing calibration................................................................. 2-24

Routine Maintenance

3

Introduction......................................................................................... 3-2

Setting the line voltage and replacing the line fuse.............................3-2

Replacing the AMPS fuse................................................................... 3-4

T roubleshooting

4

Introduction......................................................................................... 4-2

Repair considerations.......................................................................... 4-2

Power-on self-test................................................................................4-2

Front panel tests..................................................................................4-3

Principles of operation........................................................................4-4

Troubleshooting................................................................................4-10

Analog signal switching states.......................................................... 4-13

No comm link error........................................................................... 4-18

Disassembly

5

Introduction.........................................................................................5-2

Handling and cleaning.........................................................................5-2

Static sensitive devices........................................................................5-3

Assembly drawings .............................................................................5-4

Case cover removal .............................................................................5-5

Changing trigger link lines..................................................................5-6

Motherboard removal..........................................................................5-7

Front panel disassembly......................................................................5-8

Main CPU firmware replacement........................................................5-9

Removing power components...........................................................5-10

Instrument re-assembly .....................................................................5-12

6

Replaceable Parts

Introduction.........................................................................................6-2

Parts lists..............................................................................................6-2

Ordering information...........................................................................6-2

Factory service ....................................................................................6-3

Component layouts..............................................................................6-3

Specifications

A

Accuracy calculations.........................................................................A-7

Calibration Command Reference

B

Introduction........................................................................................B-2

Command summary ........................................................................... B-2

Miscellaneous calibration commands ................................................ B-4

DC calibration commands.................................................................. B-8

AC calibration commands................................................................ B-14

Manufacturing calibration commands.............................................. B-16

Remote error reporting..................................................................... B-18

Detecting calibration step completion.............................................. B-21

Calibration Program

C

Introduction........................................................................................C-2

Computer hardware requirements...................................................... C-2

Software requirements........................................................................ C-2

Calibration equipment........................................................................ C-3

General program instructions............................................................. C-3

List of Illustrations

1

Performance Verification

Connections for DC volts verification.................................................1-7

Connections for AC volts verification................................................. 1-8

Connections for DC current verification........................................... 1-10

Connections for AC current verification...........................................1-11

Connections for resistance verification (10 Ω -10M Ω ranges)........... 1-12

Connections for resistance verification (100M Ω range)................... 1-13

Connections for frequency verification.............................................1-17

Verifying ratio ................................................................................... 1-18

2

Calibration

Low-thermal short connections........................................................... 2-9

Calibrator connections for DC volts and ohms portion

of comprehensive calibration........................................................ 2-10

Connections for DC and AC amps comprehensive calibration......... 2-12

Connections for AC volts calibration................................................ 2-13

Synthesizer connections for manufacturing calibration....................2-25

Routine Maintenance

3

Power module......................................................................................3-3

T roubleshooting

4

Power supply block diagram............................................................... 4-5

Digital circuitry block diagram........................................................... 4-7

Analog circuitry block diagram .......................................................... 4-8

5

Disassembly

Trigger link connectors.......................................................................5-6

List of T ables

1

Performance Verification

Recommended verification equipment................................................1-4

DCV reading limits .............................................................................1-7

ACV reading limits..............................................................................1-9

DCI limits..........................................................................................1-10

ACI limits..........................................................................................1-11

Limits for resistance verification.......................................................1-13

Thermocouple temperature verification reading limits.....................1-15

Four-wire RTD temperature verification reading limits....................1-16

2

Calibration

Recommended equipment for comprehensive, DC-only,

or AC-only calibration......................................................................2-6

Comprehensive calibration procedures...............................................2-8

DC volts calibration summary...........................................................2-11

Ohms calibration summary ...............................................................2-11

DC current calibration summary.......................................................2-12

AC voltage calibration summary.......................................................2-13

AC current calibration summary.......................................................2-14

DC voltage calibration programming steps.......................................2-18

Resistance calibration programming steps........................................2-19

DC current calibration programming steps.......................................2-20

AC voltage calibration programming steps.......................................2-21

AC current calibration programming steps.......................................2-22

Recommended equipment for manufacturing calibration.................2-24

3

Routine Maintenance

Power line fuse....................................................................................3-3

4

T roubleshooting

Power supply components...................................................................4-4

Display board checks ........................................................................ 4-10

Power supply checks.........................................................................4-11

Digital circuitry checks .....................................................................4-12

DCV signal switching .......................................................................4-13

ACV and FREQ signal switching......................................................4-13

Ω

2 signal switching...........................................................................4-14

Ω 4 signal switching...........................................................................4-14

2/ Ω 4 reference switching...............................................................4-15

Ω

DCA signal switching .......................................................................4-15

ACA signal switching........................................................................4-15

DCV signal multiplexing and gain....................................................4-16

ACV and ACA signal multiplexing and gain.....................................4-16

DCA signal multiplexing and gain....................................................4-16

Ω 2 signal multiplexing and gain........................................................4-17

Ω 4 signal multiplexing and gain........................................................4-17

Circuit section locations for switching devices.................................4-17

6

Replaceable Parts

Mother board parts list.........................................................................6-4

Display board parts list......................................................................6-11

Connector board parts list..................................................................6-11

Mechanical parts list..........................................................................6-12

B

Calibration Command Reference

Remote calibration command summary.............................................B-2

DC calibration commands ..................................................................B-8

AC calibration commands ................................................................B-14

Calibration error summary................................................................B-18

1

Performance

V erification

1-2 Performance Verification

Introduction

Use the procedures in this section to verify that the Model 2010 Multimeter accuracy is within
the limits stated in the instrument’s one-year accuracy specifications. You can perform verifica­tion procedures:

• When you first receive the instrument to make sure that it w as not damaged during ship­ment, and that the unit meets factory specifications.

• If the instrument’s accuracy is questionable.

• Following calibration.

WARNING The information in this section is intended only for qualified service person-

nel. Do not attempt these procedures unless you are qualified to do so.

NOTE

If the instrument is still under warranty and its performance is outside specified lim­its, contact your Keithle y repr esentative or the factory to determine the corr ect course
of action.

Performance Verification 1-3

V erification test requirements

Be sure that you perform the verification tests:

• Under the proper environmental conditions.

• After the specified warm-up period.

• Using the correct line voltage.

• Using the proper calibration equipment.

• Using the specified reading limits.

Environmental conditions

Conduct your performance verification procedures in a test environment that has:

• An ambient temperature of 18-28°C (65-82°F).

• A relative humidity of less than 80% unless otherwise noted.

W arm-up period

Allow the Model 2010 Multimeter to warm up for at least two hours before conducting the

verification procedures.

If the instrument has been subjected to temperature extremes (those outside the ranges stated
above), allow additional time for the instrument’s internal temperature to stabilize. T ypically , al­low one extra hour to stabilize a unit that is 10°C (18°F) outside the specifi ed temperature range.

Also, allow the test equipment to warm up for the minimum time specified by the manufac­turer.

Line power

The Model 2010 Multimeter requires a line voltage of 100V/120V/220V/240V, ±10% and a
line frequency of 45Hz to 66Hz and 360Hz to 440Hz.

1-4 Performance Verification

Recommended test equipment

Table 1-1 summarizes recommended verification equipment. Use the Fluke Model 5700A
Calibrator (or the equivalent) to v erify Model 2010 Multimeter measurement accurac y. You can
use alternate equipment as long as that equipment has specifications at least as good as those
listed in T able 1-1. K eep in mind, ho wev er , that the calibrator will add to the uncertainty of each
measurement. Table 1-1 lists the uncertainties of the recommended Fluke 5700A at each source
value.

Table 1-1

Recommended verification equipment

Fluke 5700A Calibrator:

DC voltage

100mV:±14ppm

1.0V:±7ppm
10V:±5ppm
100V:±7ppm
1000V:±9ppm

Fluke 5725A Amplifier:

AC Voltage, 50kHz: 700V, ±375ppm

Keithley 3930A or 3940 Frequency Synthesizer:

1V RMS, 1kHz, ±5ppm

General Radio 1433-T Precision Decade Resistance Box:

10 Ω -400 Ω , ±0.02%

*1kHz specifications shown. 5725A amplifier required to source 700V at 50kHz.

NOTE: The Fluke 5725A amplifier is necessary only if you wish to verify the 750V AC range at 50kHz. Verifi­cation at 220V, 50kHz using only the 5700A calibrator is adequate for most applications.

AC voltage

(1kHz, 50kHz)*

100mV:±200ppm

1.0V:±82ppm
10V:±82ppm
100V:±90ppm
700V:±85ppm

DC current

10mA:±60ppm
100mA:±70ppm
1A:±110ppm

2.2A:±94ppm

AC current

(1kHz)

1A:±690ppm

2.2A:±682ppm

Resistance

10

Ω :±28ppm

100

Ω :±17ppm

1k

Ω :±12ppm

10k

Ω :±11ppm

100k

Ω :±13ppm

1M

Ω :±18ppm

10M

Ω :±37ppm

100M

Ω :±120ppm

V erification limits

The verification limits stated in this section have been calculated using only the Model 2010
one-year accuracy specifications. All ranges do not include the verification equipment’s uncer­tainty. If a particular measurement falls slightly outside the allowable range, recalculate new
limits based on both Model 2010 specifications and pertinent calibration equipment specifica­tions.

Example reading limit calculation

The following is an example of how reading limits have been calculated:

Assume you are testing the 10V DC range using a 10V input value. Using the Model 2010
one-year accuracy specification for 10V DC of ± (24ppm of reading + 4ppm of range), the cal­culated limits are:

Performance Verification 1-5

Reading limits = 10V ± [(10V

Reading limits = 10V ± (.00024 + .00004)

Reading limits = 10V ± .00028V

Reading limits = 9.99972V to 10.00028V

Calculating resistance reading limits

Resistance reading limits must be recalculated based on the actual calibration resistance val­ues supplied by the equipment manufacturer . Calculations are performed in the same manner as
shown in the preceding example, except you should use the actual calibration resistance values
instead of the nominal values when performing your calculations.

Restoring factory defaults

Before performing the verification procedures, restore the instrument to its factory defaults
as follows:

1. Press SHIFT and then SETUP. The instrument will display the following prompt:
RESTORE: FACT

NOTE Pressing either range key toggles the RESTORE selection between USER and FACT.

2. Select FACT, and then restore the factory default conditions by pressing ENTER.

3. Factory defaults will be set as follows:
Speed: medium

Filter: 10 readings

× 24ppm) + (10V × 4ppm)]

1-6 Performance Verification

Performing the verification test procedures

T est summary

Verification test procedures include:

• DC volts

• AC volts

• DC current

• AC current

• Resistance

• Temperature

• Frequency

• Ratio

If the Model 2010 is not within specifications and not under warranty , see the calibration pro-

cedures in Section 2.

T est considerations

When performing the verification procedures:

• Be sure to restore factory defaults as outlined above.

• Restore factory defaults and choose the measurement function to be tested.

• Make sure that the equipment is properly warmed up and connected to the front panel
input jacks. Also mak e sure that the front panel input jacks are selected with the INPUTS
switch.

• Do not use autoranging for any verification tests because autorange hysteresis may cause
the Model 2010 to be on an incorrect range. For each test signal, you must manually set
the correct range for the Model 2010 using the range keys.

• Make sure the calibrator is in operate before you verify each measurement.

• Always let the source signal settle before taking a reading.

• Do not connect test equipment to the Model 2010 through a scanner or other switching
equipment.

W ARNING The maximum common-mode voltage (voltage between INPUT LO and chas-

sis ground) is 500V peak. Exceeding this value may cause a breakdown in in­sulation, creating a shock hazard. Some of the procedures in this section may
expose you to dangerous voltages. Use standard safety precautions when
such dangerous voltages are encountered to avoid personal injury caused by
electric shock.

V erifying DC voltage

Check DC voltage accuracy by applying accurate v oltages from the DC v oltage calibrator to
the Model 2010 INPUT jacks and verifying that the displayed readings fall within specified lim­its. Follow these steps to verify the DC voltage:

CAUTION Do not exceed 1000V peak between INPUT HI and INPUT LO because in-

strument damage may occur.

1. Connect the Model 2010 HI and LO INPUT jacks to the DC voltage calibrator as sho wn
in Figure 1-1.

NOTE Use shielded, low-thermal connections when testing the 100mV and 1V ranges to

avoid errors caused by noise or thermal ef fects. Connect the shield to the calibr ator’s
output LO terminal.

Performance Verification 1-7

Figure 1-1

Connections for
DC volts verifica­tion

5700A Calibrator (Output DC Voltage)

Model 2010

2000 MULTIMETER

Input HI

Output HI

!

R

Input
LO

Output
LO

Note : Use shielded, low-thermal cables
for 100mV and 1V ranges.

2. Select the DC volts function by pressing the DCV key, and set the Model 2010 to the
100mV range.

3. Set the calibrator output to 0.00000mV DC, and allow the reading to settle.

4. Enable the Model 2010 REL mode. Leave REL enabled for the remainder of the DC
volts verification tests.

5. Source positive and negative full-scale voltages for each of the ranges listed in Table 1-

2. For each voltage setting, be sure that the reading is within stated limits.

Table 1-2

DCV reading limits

Range

100mV

1V

10V

100V

1000V

* Source positive and negative values for each range.

Applied DC

voltage*

100.0000mV

1.000000V

10.00000V

100.0000V

1000.000V

Reading limits

(1 year, 18°C–28°C)

99.99540 to 100.00460mV

0.9999730 to 1.0000270V

9.999720 to 10.000280V

99.99600 to 100.00400V

999.9530 to 1000.0470V

1-8 Performance Verification

V erifying AC voltage

Check AC voltage accuracy by applying accurate AC voltages at specific frequencies from
the A C v oltage calibrator to the Model 2010 inputs and verifying that the displayed readings f all
within specified ranges.

Figure 1-2

Connections for
AC volts verifica­tion

CAUTION Do not exceed 1000V peak between INPUT HI and INPUT LO, or 8

V•Hz input, because instrument damage may occur.

Follow these steps to verify AC voltage accuracy:

1. Connect the Model 2010 HI and LO INPUT jacks to the A C voltage calibrator as sho wn
in Figure 1-2.

5725 Amplifier (Connect to calibrator)

Note: 5725 Amplifier required only
for 700V, 50kHz output.

Model 2010

2000 MULTIMETER

Input HI

Output HI

!

R

Input
LO

Shielded cable

Output
LO

5700A Calibrator (Output AC Voltage)

2. Select the AC volts function by pressing the ACV key.

3. Set the Model 2010 for the 100mV range; make sure that REL is disabled.

4. Source 1kHz and 50kHz AC voltages for each of the ranges summarized in Table 1-3,
and make sure that the respective Model 2010 readings fall within stated limits.

7

×

10

Table 1-3

ACV reading limits

Performance Verification 1-9

ACV

range

Applied

AC voltage

(1 year, 18°C–28°C)

1kHz 50kHz

Reading limits

100mV

1V

10V
100V
750V

*If the 5725A amplifier is not available, change the 700V at 50kHz step to 220V at 50kHz.

(Reading limits for 220V at 50kHz = 219.361 to 220.639V).

100.0000mV

1.000000V

10.00000V

100.0000V

700.000V*

99.910 to 100.090mV

0.99910 to 1.00090V

9.9910 to 10.0090V

99.910 to 100.090V

699.36 to 700.64V

99.830 to 100.170mV

0.99830 to 1.00170V

9.98300 to 10.0170V

99.830 to 100.170V

698.79 to 701.21V

1-10 Performance Verification

V erifying DC current

Check DC current accuracy by applying accurate DC currents from the DC current calibrator
to the AMPS input of the Model 2010 and v erifying that the displayed readings f all within spec­ified limits. Follow these steps to verify DC current accuracy:

1. Connect the Model 2010 AMPS and INPUT LO jacks to the calibrator as shown in Fig­ure 1-3.

2. Select the DC current measurement function by pressing the DCI key.

3. Set the Model 2010 for the 10mA range.

4. Source positive and negati v e full-scale currents for each of the ranges listed in Table 1-4,
and verify that the readings for each range are within stated limits.

Figure 1-3

Connections for
DC current verifi­cation

5700A Calibrator (Output DC Current)

Model 2010

2000 MULTIMETER

Input
LO

Output HI

!

R

Amps

Output
LO

Note: Be sure calibrator is set for

normal current output.

Table 1-4

DCI limits

DCI
range

10mA

100mA

1A
3A

*Source positive and negative currents with values shown.

Applied DC

current*

10.0000mA

100.0000mA

1.000000A

2.20000A

Reading limits

(1 year, 18°C–28°C)

9.994600 to 10.005400mA

99.94600 to 100.05400mA

0.9991600 to 1.0008400A

2.197315 to 2.202685A

V erifying AC current

Check A C current accurac y by applying accurate AC current at specific frequencies from the
AC current calibrator to the Model 2010 input and verifying that the displayed readings fall
within specified limits. Follow these steps to verify AC current:

1. Connect the Model 2010 AMPS and INPUT LO jacks to the calibrator as shown in Fig­ure 1-4.

2. Select the AC current function by pressing the ACI key.

3. Set the Model 2010 for the 1A range.

4. Source 1A and 2.2A, 1kHz full-scale AC currents as summarized in T able 1-5, and verify
that the readings are within stated limits.

Performance Verification 1-11

Figure 1-4

Connections for
AC current verifi­cation

Model 2010

Table 1-5

ACI limits

ACI

range

1A
3A

!

2000 MULTIMETER

R

Amps

Applied DC

voltage

1.000000A

2.20000A

Output HI

Input
LO

Output
LO

5700A Calibrator (Output AC Current)

Reading limits

(1 year, 18°C–28°C) 1kHz

0.99860 to 1.00140A

2.1949 to 2.2051A

1-12 Performance Verification

V erifying resistance

Check resistance by connecting accurate resistance values to the Model 2010 and verifying

that its resistance readings are within the specified limits.

CAUTION Do not apply more 1000V peak between INPUT HI and LO or more than

350V peak between SENSE HI and LO, or instrument damage could occur.

Follow these steps to verify resistance accuracy:

1. Using shielded 4-wire connections, connect the Model 2010 INPUT and SENSE jacks
to the calibrator as shown in Figure 1-5.

Figure 1-5

Connections for
resistance verifi-

Ω

cation (10

-

10MΩ ranges)

5700A Calibrator

Sense LO

Model 2010

2000 MULTIMETER

Sense LO

Sense HI

!

R

Sense HI

Input
HI

Output
HI

InputLOOutput

LO

Note : Use shielded low-thermal cables to
minimize noise. Enable or disable
calibrator external sense as indicated
in procedure.

2. Set the calibrator for 4-wire resistance with external sense on.

3. Select the Model 2010 4-wire resistance function by pressing the

4. Set the Model 2010 for the 10
calibrator output to 0

Ω , then enable Model 2010 REL.

Ω range, and make sure the FILTER is on. Set the

Ω 4 key.

5. Recalculate reading limits based on actual calibrator resistance values.

6. Source the nominal full-scale resistance values for the 10

Ω -10M Ω ranges summarized

in Table 1-6, and verify that the readings are within calculated limits.

7. Connect the Model 2010 INPUT and SENSE jacks to the calibrator as shown in Figure
1-6.

8. Disable external sense on the calibrator.

9. Set the Model 2010 for the 100M

10. Source a nominal 100M
lated limits for the 100M

Ω resistance value, and verify that the reading is within calcu-

Ω range.

Ω range.

Table 1-6

Limits for resistance verification

Nominal

Ω range

applied

resistance

Nominal reading limits

Performance Verification 1-13

(1 year, 18°C–28°C) Recalculated limits*

10 Ω

100 Ω

1k Ω

10k Ω

100k Ω

1M Ω

10M Ω

100M Ω

* See verification limits.

Figure 1-6

Connections for
resistance verifi-

Ω

cation (100M
range)

10 Ω

100 Ω

1k Ω

10k Ω

100k Ω

1MΩ

10MΩ

100MΩ

9.999310 to 10.000690Ω

99.99390 to 100.00610Ω

0.9999480 to 1.0000520kΩ

9.999480 to 10.000520kΩ

99.99080 to 100.00920kΩ

0.9999260 to 1.0000740MΩ

9.995960 to 10.004040MΩ

99.84960 to 100.15040MΩ

Sense HI

Model 2010

2000 MULTIMETER

Sense LO

!

R

Input
HI

InputLOOutput

______________to_____________ Ω
______________to_____________ Ω
______________to_____________ kΩ
______________to_____________ kΩ
______________to_____________ kΩ
______________to_____________ MΩ
______________to_____________ MΩ
______________to_____________ MΩ

5700A Calibrator (Output 2-wire Resistance)

Output
HI

LO

Note : Use shielded cables to minimize noise.
Disable calibrator external sense mode.

1-14 Performance Verification

V erifying temperature

Thermocouple and RTD temperature readings are derived from DC volts and ohms readings
respectively. For this reason, it is not necessary to independently verify the accuracy of temper­ature measurements. As long as the DC v olts and ohms functions meet or exceed their respecti ve
specifications, temperature function accuracy is automatically verified. However, temperature
verification procedures are provided belo w for those who wish to separately v erify temperature
accuracy.

Thermocouple temperature

1. Connect the DC voltage calibrator output terminals to the Model 2010 INPUT jacks us­ing low-thermal shielded connections. (Use 2-wire connections similar to those shown
in Figure 1-1.)

2. Configure the Model 2010 for °C units, type J temperature sensor, and 0°C simulated ref­erence junction as follows:
A. Press SHIFT then SENSOR, and note the unit displays the temperature units:

UNITS: C. (If necessary, use the cursor and range keys to select °C units.)

B. Press ENTER, and note the unit displays the sensor type: SENS: TCOUPLE. (Use

the cursor and range keys to select a thermocouple type temperature sensor.)
C. Press ENTER. The unit then displays the thermocouple type: TYPE: J.
D. Select a type J temperature sensor, and then press ENTER. The unit displays the ref-

erence junction type: JUNC: SIM.
E. Make sure the simulated reference junction type is selected, and then press ENTER.

The unit displays the current simulated reference junction temperature: SIM: 023.
F . Using the cursor and range keys, set the reference junction temperature to 0°C, and

then press ENTER to complete the temperature configuration process.

Performance Verification 1-15

3. Select the temperature function by pressing the TEMP key.

4. Source each of the voltages summarized in Table 1-7, and verify that the temperature
readings are within limits. Be sure to select the appropriate thermocouple type for each
group of readings. (See step 2.)

Table 1-7

Thermocouple temperature verification reading limits

Thermocouple

type

J

K

* Voltages shown are based on ITS-90 standard using 0°C reference

junction temperature. See text for procedure to set reference junction
temperature.

Applied DC

voltage*

-7.659mV
0mV

42.281mV

-5.730mV
0mV

54.138mV

Reading limits

(1 year, 18°C–28°C)

-190.60 to -189.40°C

-0.50 to +0.50°C

749.50 to 750.50°C

-190.60 to -189.40°C

-0.50 to +0.50°C

1349.20 to 1350.80°C

1-16 Performance Verification

RTD temperature

1. Connect the precision decade resistance box (listed in Table 1-1) to the Model 2010
INPUT and SENSE jacks using 4-wire connections. (See Figure 1-1 for a similar
connecting scheme.)

2. Configure the Model 2010 temperature function for °C units and RTD temperature sen­sor (α=0.00385) as follows:
A. Press SHIFT then SENSOR, and note the unit displays the temperature units:

UNITS: C.
B. Press ENTER, and note the unit displays the sensor type: SENS: TCOUPLE.
C. Using the cursor and range keys, set the display as follows: SENS: 4W-RTD.
D. Press ENTER, and note the unit displays: TYPE: PT100.
E. Using the cursor and range keys, set the unit for the following display: TYPE:

PT385.
F. Press ENTER to complete the temperature configuration process.

3. Select the temperature function by pressing the TEMP key.

4. Set the decade resistance box to each of the values shown in Table 1-8, and verify that
the temperature readings are within the required limits.

Table 1-8

Four-wire RTD temperature verification reading limits

Applied
resistance*

22.80Ω

100.00Ω

313.59Ω

* Based on a = 0.00385. See text.

Reading limits (°C)

(1 year, 18°C–28°C)

-190.14 to -189.86°C

-0.08 to +0.08°C

599.86 to 600.14°C

V erifying frequency

Follow the steps below to verify the Model 2010 frequency function.

1. Connect the frequency synthesizer to the Model 2010 INPUT jacks. See Figure 1-7.

2. Set the synthesizer to output a 1kHz, 1V RMS sine wave.

3. Select the Model 2010 frequency function by pressing the FREQ key.

4. Verify that the Model 2010 frequency reading is between 999.9000Hz and 1.000100kHz.

Performance Verification 1-17

Figure 1-7

Connections for
frequency verifi­cation

Model 2010

2000 MULTIMETER

!

R

BNC-to-Dual

Banana Plug

Adapter

50Ω BNC Coaxial Cable

Model 3930A or 3940 Synthesizer

Main

Function

Output

1-18 Performance Verification

V erifying ratio

CAUTION When verifying ratio or using sense volts, the SENSE LO terminal must be

1. Connect SENSE HI to INPUT HI, and connect SENSE LO to INPUT LO.

2. Connect the DC calibrator output HI and LO terminals to the Model 2010 HI and LO
terminals respectively, as shown in Figure 1-8.

3. Select the Model 2010 DCV function, and select the 1V range.

4. Set the DC calibrator output to +1.000000V DC, and turn on its output.

5. Press SHIFT then RATIO, then select and enable both RATIO:ON and SENSEIN:ON.

6. Verify that the ratio reading is between 0.9999460 and 1.0000540.

referenced to INPUT LO. Exceeding 350V DC from SENSE HI to SENSE
LO will cause instrument damage.

Figure 1-8

Verifying ratio

STEP CH2 CH3 CH4 CH5 CH6 CH7 CH8 CH9 CH10
TALK
LSTN
SRQ
SHIFT
TIMER

HOLD TRIG FAST MED SLOW AUTO ERR

MX+B

SHIFT

DCV

LOCAL

EX TRIG

POWER

SAVE SETUP

OPEN CLOSE

Model 2010

CH1REM

SCAN

REL FILT

dBm

%

dB

ACI

ACV

DCI

HOLD

LIMITS ON/OFFDELAY

TRIG

STORE

RECALL

CONFIG HALT

STEP SCAN

CONT

DIGITS RATE

Ω2 Ω4

TYPE

GPIB

BUFFER

RATIO

RELFILTER

RS232

SENSE HI

MATH
REAR

4W

STAT

2010 MULTIMETER

PERIOD SENSOR

FREQ

TEMP

DRYCKT O COMP

CAL TEST

EXIT ENTER

Model 5700A

HI

SENSE

INPUT

Ω 4 WIRE

HI

350V

1000V

!

PEAK

PEAK

LO

500V
PEAK

INPUTS

F

R

RANGE

AUTO

FRONT/REAR

3A 250V

AMPS

RANGE

Short SENSE HI to INPUT HI
Short SENSE LO to INPUT LO

LOSENSE LO

2

Calibration